4276 4280.output

* GB784683 (A)

Description: GB784683 (A) ? 1957-10-16

Improvements in or relating to the application of liquids to moving bands orstrips

Description of GB784683 (A)

PATENT SPECIFICATION Date of filing Complete Specification Aug -I I, 1955. Application Date Aug 12, 1954. Complete Specification Published Oct 16, 1957. Index at Ac Internatie ERRATA SPECIFICATION No 784,683 Page 3, line 53, delete "underside of the" Page 3, line 104, after" greasing" insert "device" THE PATENT OFFICE, 12th December, 1957. ti t) gr, a say the deposition thereon of a film of an oil or a fat in liquid form, prior to passing it through t Lhe oven. According to the present invention, a container for the liquid is pivotably mounted for adjustment between limits about its longitudinal axis and with a weir edge thereof closely proximate to the surface of the band to which the liquid is to be applied at a point where the band is constrained to move in a definite path at an angle to the horizontal, means to supply liquid to the container being provided and being controlled to maintain, or tend to maintain, in the container a liquid level above said weir edge, whereby the liquid tends to overflow said weir edge and is thereby brought into contact with the surface of the band, a trough or sump being provided below the container to catch excess liquid for subsequent recirculation. In one embodiment of the invention, the container is mounted beneath the band with the weir edge close to the said surface of the band. Preferably, the container is so disposed relative to the band that the liquid comes into contact with the band when the latter is moving in an upward direction, but the alternative is also visualized, in which case the weir edge closely proximate to the band would then act, -in dependence on the clearance between itself and the band, to regulate the thickness lPrice 3 s 6 d l tsxa, u 1 b 116 g UCV 1 Lcet; Fig 2 is an end view of the device in detail, and Fig 3 is a side view thereof

as seen from the right of Fig 2. An endless oven band 1 of a travelling band oven passes about a terminal drum 2 disposed for rotation in the direction indicated at the feed end of the oven Bearings in which the drum 2 is journalled are mounted on a platform assembly of channel section girders indicated by 3, which is slidable relative to the oven in a longitudinal direction of the band 1 to allow for adjustment of the drum for the purpose of tensioning the band Fixed dependently from the platform assembly 3 is a frame of angle section girders 4 serving to support the band greasing device, denoted generally 5, (Fig 1), in operative relationship with the continuously moving oven band 1, at a point where the band is constrained to move in a definite path at an angle to the horizontal; i e. at a point where band 1 is passing round the drum 2. The greasing device 5 comprises a supply tank 6 which, under the control of a valve 7, supplies its content of oil or fat in liquid form through a pipe 8 into a horizontally disposed length of pipe 9 perforated along its length to discharge the liquid into a trough-shaped container 10 The container 10 extends between two side plates 5 a and its mounting therein enables pivotal movement about its longi7845683 No 23401/54. J ',, zz - ' '1, 1 ' I Q i; -11 PATENT SPECIFICATION Date of filing Complete Specification Aug -11, 1955. Application Date Aug 12, 1954. 784,683 No 23401/54. \,,_, Complete Specification Published Oct 16, 1957. Index at Acceptance -Classes 28 ( 1), N 4; and 140, K 3 X. International Classification: -A 21 b B 05. COMPLETE SPECIFICATION Improvements in or relating to the Application of Liquids to Moving Bands or Strips We, T & T VICARS LIMITED, a British company, of Earlestown, Newton-le-Willows, Lancashire, and J Os EPH FRANCIS NAYLOR, a British subject, of 174, Earl Street, Newtonle-Willows, Lancashire, do hereby declare the invention, for which we pray that a patent fmay be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:The present invention is concerned with the application of a liquid to a surface of a continuously moving band, more particularly, in the preparation of edible baked products, the greasing of an endless oven band, that is to say the deposition thereon of a film of an oil or a fat in liquid form, prior to passing it through the oven. According to the present invention, a container for the liquid is pivotably mounted for adjustment between limits about its longitudinal axis and with a weir edge thereof closely proximate to the surface of

the band to which the liquid is to be applied at a point where the band is constrained to move in a definite path at an angle to the horizontal, means to supply liquid to the container being provided and being controlled to maintain, or tend to maintain, in the container a liquid level above said weir edge, whereby the liquid tends to overflow said weir edge and is thereby brought into contact with the surface of the band, a trough or sump being provided below the container to catch excess liquid for subsequent recirculation. In one embodiment of the invention, the container is mounted beneath the band with the weir edge close to the said surface of the band. Preferably, the container is so disposed relative to the band that the liquid comes into contact with the band when the latter is moving in,an upward direction, but the alternative is also visualized, in which case the weir edge closely proximate to the band would then act,,in dependence on the clearance between itself and the band, to regulate the thicknlmess lPrice 3 s 6 d 1 of the liquid film taken up by the band For the same purpose, particularly in conjunction with the former preferred case, a doctor blade in operative relationship with the band may be disposed following the container in the direction of movement of the band. The invention will now be further described with reference to its embodiment, by way of example, in a device for greasing the oven band or sole of a baker's oven, the device being illustrated in the drawings accompanying the provisional specification in which:- Fig 1 is a diagrammatic view of the feed end of the oven band and shows the location of the greasing device; Fig 2 is an end view of the device in detail, and Fig 3 is a side view thereof as seen from the right of Fig 2. An endless oven band 1 of a travelling band oven passes about a terminal drum 2 disposed for rotation in the direction indicated at the feed end of the oven Bearings in which the drum 2 is journalled are mounted on a platform assembly of channel section girders indicated by 3, which is slidable relative to the oven in a longitudinal direction of the band 1 to allow for adjustment of the drum for the purpose of tensioning the band Fixed dependenfly from the platform assembly 3 is a frame of angle section girders 4 serving to support the band greasing device, denoted generally 5, (Fig 1), in operative relationship with the continuously moving oven band 1, at a point where the band is constrained to move in a definite path at an angle to the horizontal; i e. at a point where band 1 is passing round the drum 2. The greasing device 5 comprises a supply tank 6 which, under the control of a valve 7, supplies its content of oil or fat in liquid form through a pipe 8 into a horizontally disposed length of pipe 9

perforated along its length to discharge the liquid into a trough-shaped container 10 The container 10 extends between two side plates 5 a and its mounting therein enables pivotal movement about its longi784,683 tudinal axis for the purpose of adjusting a weir edge 10 a of the container relative to the oven band (see Fig 3) The container is mounted with the weir edge 10 a in close proximity to that surface of the continuously moving band 1, which, after passing round drum 2, becomes the upper side of the top run of the band 1. The adjustment of the container 10 is effected by a screw setting arrangement 11 and is limited in one direction by a screw stop 12, both the setting arrangement and the stop being operative on an arm fixed to the container at one end thereof. A doctor blade, preferably of felt, is disposed to bear against the surface of the oven band subsequent to the container 10 in the direction of movement of the band Such a felt blade 13 is seen in Fig 3 to be held between clamp plates 14 which in turn are fixed by screws 15 to a bar 16 extending between the side plates 5 a The bar 16 is movable angularly by an arm 17 which is connected with a screw setting arrangement 18. A catch trough or sump 19 is located between the side plates 5 a and below the container 10 and the doctor blade 13 The sump 19 is supported at the front and rear on angle sections 20 and 21, the sump being held against the vertical flange of the angle section by a catch 22 The angle sections 20, 21, together with the side plates 5 a, are slidable in the frame formed by girders 4 by means of set screws 23, 24 so providing adjustment of the complete device relative to the oven band The sump 19 is connected through a drain cock 25 and a pipe 26 to the inlet side of a motor-driven pump 27 A return pipe 28 extends from the delivery side of this pump to the supply tank 6 A float 29 is arranged in the sump 19 to actuate a switch controlling stopping and starting of the pump motor in dependence on the liquid level in the sump. In operation the valve 7 is regulated so tihat liquid oil or fat is fed by gravity from the supply tank 6 to maintain in the container 10 a level at which liquid tends to overflow the weir edge 10 a The weir edge l O being situated closely to the oven band 1, it will be appreciated that the oven band in fact confines the liquid oil or fat in the trough-shaped container 10 and thereby comes into contact with the liquid when it is virtually still contained within the container, in contrast to ejection or free fall of the liquid on to the band Liquid is consequently taken up by the band and then becomes spread and regularized into a uniform film of desired thickness by the doctor blade 13, surplus liquid being removed thereby to fall into the sump 19 Periodically such surplus is removed from the sump by the pump 27

and returned to replenish the supply tank 6 Obviously the supply tank must be topped up from time to time to balance the amount of liquid oil or fat used on the oven band. An important feature of greasing devices is the ease -wzitl which they may be cleaned and it is therefore appropriate to point out that in 70 the case eof the doctor blade 13 this may be held, together with the clamp plates 14, to the screws 15 merely by means of nuts which when screwed off enable the blade to be removed for replacement or cleaning Also in 75 the case of the trough-shaped container 10 the threaded spindle 31 of the screw setting arrangement 11 may pass through an openended slot in the fixing bracket 32, so that the spindle may be eased out of this slot and the 80 container 10 turned freely to discharge its conte Its into the sumo 19 below, e g when closing down the oven In this way tedious manipulation of the screw arrangement 11 to achieve the same object is avoided, and by the 85 provisicn of the step 12 the container 10 may be easily returned to any preset position.

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* GB784684 (A)

Description: GB784684 (A) ? 1957-10-16

Improvements in reciprocating motors for actuation by a fluid supplied atsubstantially constant pressure


PAT-ENT SPECIFICATION Date of filing Complete Specification Nov 29, 1955. Application Date Aug 31, 1954. 7845684 No 25311/54.

Complete Specification Published Oct 16, 1957. Index at Acceptance:-Classes 69 ( 2), K( 1 82: 4: 5 A 3: 5 F: 5 G: 10) P( 3 X: 6 B: 6 N: 7 C); and 122 ( 2), Bl SB 1 (A 3 B: B). International Classification: -FO 3 c. COMPLETE SPECIFICATION Improvements in Reciprocating Motors for Actuation by a Fluid Supplied at substantially Constant Pressure I, GEORGE STEPHEN KAMMER, a British Subject, of Kammer Engines Limited, Pilot Works, Walnut Tree Close, Guildford, Surrey, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: - This invention relates to reciprocating motors for actuation by a fluid supplied at, substantially constant pressure Such a motor comprises a piston or ram mounted on or integral with a rod to operate in a cylinder and exposed to the pressure of the fluid on its two sides in alternation to impress a reciprocating movement on the rod, and a piston valve movable alternately into two positions to put the space on one or other side of the piston into communication with the pressure fluid supply and that on the other side with exhaust, The present invention relates to means for operating the valve by which the pressure of the working fluid is applied to the two sides of the piston alternately and the other side is connected to exhaust It has been more particularly devised in the form of a hydraulic motor for driving an agricultural mower, but it is not restricted to such an application or to, liquid as a working fluid. According to the invention the moving part of the piston valve has a cavity at each end in communication through a stationary member entering the cavity with a duct leading to a space at the corresponding end of the cylinder in which the working piston reciprocates, the said space being cylindrical and of a diameter intermediate between those of the piston and its rod, while a plunger on each side of the piston can enter the respective space at the end of the working stroke to build up a pressure in the cavity which will give rise to a movement of the valve member into its opposite position for the return stroke. Preferably each duct includes a non-return valve urged by spring pressure to close the duct towards the cavity and adapted in its lPrice 3 s 6 d l opposite position to close a branch duct leading from the first mentioned duct to exhaust. Optional features of the invention will appear from a description now to be given of 50 a constructional form shown by way of example in the accompanying drawings, in which: Figure 1 is a sectional elevation of the motor; 55 Figure 2 is an end'elevation of the same; Figure 3 is a

part end elevation taken in section on the line III-III of Figure 1; Figure 4 is an outside elevation corresponding to Figure 1 with parts broken away, and 60 Figure 5 is a fragmentary section taken on the line v-V of: Figure 3. Referring to the drawings a body 1 encloses all the working parts and is provided with a slotted lug 21 by which the motor can be bolted 65 to the frame of the apparatus or machine to be driven Oil under pressure is supplied by means of a connection 3, and after-use the oil passes from the exhaust 4 to a return lead for re-circulation 70 In the body 1 a hydraulic cylinder 5 is formed by a through bore, which is closed at the two ends by plugs 6 held in place by countersunk screws 7 Glands are formed in the plugs 6 for the passage of a shaft 8 The 75 plug 6 at the right-hand end of Figure 1 constitutes a guide for the rod 8 of which the outer part is enclosed in a casing 9 The gland 6 at the other end carries the working end of the shaft 8 which has connecting means 10 80 for the mechanism to be driven by the motor. An enlargement is formed at an intermediate position of the shaft 8 to constitute a piston 1; 1, which works in'the bore 5 A second bore 12 is formed in the body 1 parallel to the bore 85 and this bore is also cdosed at its ends as will be described-later A valve member 13 in the shape of a dumb-bell or spool is movable to and fro in the bore 12 to control the admission and exhaust of oil to and from the 90 cylinder 5 Passages 14 connect the two ends of the bore 12 with the pressure supply point 784,684 3, and other passages 15 lead from the ends of the bore 5 to positions near the respective ends of the bore 12. Between the passages 14 and 15 at each end of the bore 12 there is a land to co-operate with a land at the respective end of the spool 13 A duct leads from the inner part of the space 12 between the ducts 15 to the exhaust 4 It will be seen that, when the spool 13 is in the position shown in Figure 1, the left-hand end of the cylinder space 5 is under pressure and the shaft 8 is being driven to the right, having nearly reached the end of its stroke. The right-hand part of the cylinder space 5 is at the same time in communication with an exhaust duct 17 leading to the connection 4. The spool 13 has at each end an axial cavity 18, but the two cavities are not in communication with each other The two ends of the falve cavity 12 are each closed by a plug member 19, which has an axial extension 20 projecting into the space 18 A shoulder 21 on the extension 20 limits the movement of the spool 13, so that at one end the land is fairly on the land of the body 1 and at the other end the land is clear of the passage 15, while the projection 20 is still inside the hollow 18 of the spool 13. An oil passage 22 extends centrally through the projection 20 and at

the outer end is branched, one branch being a passage 23 leading through the wall of the plug 6 The other passage 24 leads by a duct 25 (Figure 5) to the exhaust 4 A ball 26 is movable between upper and lower positions, in which it closes the passages 24 and 23 respectively It is urged to the lower position closing the passage 23 by a spring 27 acting on a rod 28. At each side of the piston 11 a plunger 29 is formed of diameter less than that of the piston 11 but greater than that of the shaft 8. A bore is provided in the plug 6 to receive the plunger 29 which will be seen to be just entering the bore of the right-hand plug 6 By this action, the plunger 29 forms a dashpot to brake the movement of the shaft 8 and piston 11 However, between the plunger 29 and the part of the shaft 8 of normal diameter there is a recessed part 30 terminating in a sharp shoulder or control edge 31 to co-operate with the duct 23 where the latter emerges into the bore of the plug 6. As a result, when the edge 31 uncovers the end of the duct 23, oil under high pressure passes through the duct 23 and raises the ball 26 to its upper position, closing the duct 24 to exhaust and raising the pressure in the duct 22 and the right-hand space 18 The lefthand space 18 and duct 22 are in communication with exhaust since the left-hand ball 26 is on its lower seating The sudden increase of pressure from the right moves the spool 13 rapidly to the left into the position opposite to that shown in Figure 1, and the connections to pressure and exhaust are reversed from that 65 shown The piston 11 moves to the left, and when it reaches the end of its travel the same processes take place but at the opposite end, and the shaft 8 is thereby kept in continuous reciprocation 70


* GB784685 (A)

Description: GB784685 (A) ? 1957-10-16

Improvements relating to the removal of dust from buffed hides, skins andthe like


PATENT SPIECIFICATION Date of filing Complete Specification Oct 17, 1955. Application Date Nov 29, 1954. Complete Specification Published Oct 16, 1957. 784,685 No 34521/54. Index at Acceptance:-Classes 8 ( 2), A 2 (BX: D: E); and 76, C 1 B 2. International Classification: -B 31 f C 14 b. COMPLETE SPECIFICATION Improvements relating to tie Removad of 1 Dust from Bufed Hides, Skins and the like We, TURNER MACHINERY LIMITED, formerly known as The Turner Tanning Machinery Co. Limited, a British Company, of Railway Foundry, Bramley, Leeds, and CLIFFORD H" LL, a British subject of the Company's address, do hereby declare the invention, for which vwe pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by thz folloivng statement:- The present invention is concerned with machines for, and methods of, buffing sheet material such as hides, skins, leather board, and cardboard, being coilctively referred to hereafter simply as "skins ". The description "bufing machines" is used to refer to the various machines which act abrasively, or with a surface cutting action, on the surface of the skin to prepare it for various uses In conventional forms of buffing machinery, there are a buffing roller, that has its periphery covered or equipped to perform the abrasive operation, and a counter roller (Generally rubber covered) which is used for the dual purposes of feeding or presenting a skin to the buffing roller and ef providing a work support against which the abrasive action is performed by this buffing roller, the treated skin passing, in fact, through the nip between these two rollers The term "a buffing machine of the character set forth" will hereinafter be used to indicate a machine having the feature stated in this paragraph. In accordance with one aspect of the present invention, we provide in or for a buffing machine of the character set forth, a dustextracting mechanism comprising a suction nozzle disposed, or for disposal, alongside the path of travel of the buffed skin leaving the buffing roller, and a compressed air nozzle adjacent this suction nozzle and also alongside said path, this compressed air nozzle being located in use between the suction nozzle and the buffing roller and being so

directed as to project compressed air against the skin in a direction counter to the direction lPrice 3 s 6 d l of travel of this skin and between the latter and the buffing roller. The invention also includes the provision, in or for a buffing machine of the character set forth, of a dust-extracting mechanism comprising a nozzle for directing compressed air against the buffed skin, this nozzle being disposed in use adjacent the peripheryof the buffing roller and alongside the path of travel of the buffed skin leaving this roller, and being directed tangentially or substantially tangentially to the roller periphery so that the flow of compressed air therefrom will urge the buffed skin outwards and away from the roller periphery, and a suction nozzle adjacent the compressed air nozzle for extraction of dust loosened from the skin by the flow of compressed air. Thus, by the means described, a scraper knife or other such stripping means, which are normally required to ensure that the skin leaves the buffing roller and is not wrapped around the latter, is or are dispensed with, and at the same time some at least of the dust evolved in the bufling operation, a substantial proportion of which clings to the skin, is removed. In accordance with a feature of the invention, the buffing machine is so devised that the compressed air and suction nozzles are disposed below the nip between the buffing and counter rollers. Thus, the invention further provides a machine of the character set forth in which the skin is arranged to travel downwardly from the nip between the buffing and backing rollers, and there is provided, alongside the path of the downwardly-moving skin, a suction nozzle which is disposed so that the skin passes, in its downward travel, over the mouth of this nozzle, and at least one nozzle for directing compressed air against the side of the skin passing over the mouth of the suction nozzle. A brush, conveniently one used to clean the backing roller, may be used to ensure that the skin is yieldingly urged against the suction 2 784,685 nozzle in its travel from the nip between the buffing and backing rollers. Hence, the invention also comprises at least one nozzle for directing compressed air against the buffed skin, a suction nozzle for receiving and exhausting dust from the buffed skin, and a brush disposed to act on the buffed skin at the opposite side thereof to the suction nozzle and to apply the slkin against the latter. To assist the smooth passage of the skin over the mouth of the suction nozzle, this mouth is preferably provided with a grid or grating which divides this mouth, in effect, into a plurality of side-by-side slot-like openings Moreover, the bars of the grid or grating defining

the said slot like openings will advantageously be parallel and slightly oblique to the direction of travel of the skin over this nozzle mouth This will ensure that every element of the buffed surface passes over a suction optening and strips of the surface are not left untreated by suction. More than one compressed air nozzle can be used, for example one at least at a stripping location, and one or more others at a subsequent position or positions along the travel of the skin Furthermore, where we employ compressed air nozzles which are spaced along the path of travel of the skin, they may be associated with separate suction nozzles, or where feasible, withi a common suction nozzle, for example located between two of these compressed air nozzles, serving a plurality of such nozzles. In a preferred arrangement of this character, the machine comprises two compressed air nozzles, one located immediately adjacent the lower part of the buffing roller and directed to produce an air flow which acts between the periphery of the roller and the skin, and a second such nozzle located further along the path of travel of the sldn through the machine, and exclusively intended for the scavenging of dust from this skin, with a single suction nozzle located between them. In this arrangemint the suction niczzle is of elongated form and extends across the whole, or substantially the whole, operative width of the machine below the buffing and backing rollers with its length transverse to the direction of travel of the skin from these rollers, and elongated compressed air nozzles, each of substantially the same length as this suction nozzle, are disposed one in front, and one to the rear, of the latter in the said direction of travel, the mouths of the two compressed air nozzles being adjacent to, parallel to, and substantially flush with that of the suction nozzle. As will be appreciated, the two compressed air nozzles, not having identical functions, may be directed to discharge compressed air in jets at contrasting angles relatively to the path of travel of the skin as it passes between them. In an advantageous arrangement the mouth of the suction nozzle is disposed with its width at an angle to the vertical and to the path of descending travel of the skin leaving the buffing and backing rollers, and in which the compressed air nozzles are arranged to pro 7 ject air at dicierrt anges one nozzle relatively to the other, against the buffed surface of the skin passing thereover. In accordance with further features of the invention, the suction nozzle and the corn 7: pressed air nozzle(s) may be equipped internally with baffle and spreader mean for equalizing the air flow along the length of the

respective nozzles, as set forth below. The present invention further includes 8 methods of extracting the dust from a buffed skin, again as set forth below. A leather buffing machine incorporating the features of tie present invention will now be described with reference to the accompanying 8 drawings in which:Fig 1 is a front elevational view of the machine. Figure 2 is a cross sectional view taken on the line II-Il of Figure 1 9 Figure 3 is an elevational view of the machine from the right hand end, with the guard cover at this end removed. Figure 4 shows, separately, the air compression and suction nozzle assembly of the 9: machine as viewed on the line IV-IV of Figure 2. The machine illustrated comprises a base frame 1 with a pair of cast end uprights 2 razaebiy supparting a high d naing reller l C 3 covered with an abrasive layer and disposed on a shaft 4 journalled in these uprights The roller 3 is opposed by a rubber-covered feed and work-supporting roller 5 mounted on a shaft 6 which is journalled in carriages each C 1 ( slidable in the front-to-rear direction of the m-achine on a sidle 7 ay ' ien cuel Oi thl uprights 2 Each carriage is in two parts 8 and 9. The former of these is slidable on an extension of part 9 and carries the shaft 6 It is urged 11 resiliently towards the buffing roller 3 through a spring loaded plunger 10 mounted in carriage par 7 h spring pressure on this plunger can be set by operation of concentric hand wheels 11 and 12, but no details of this spring 11 loading is shown since it forms no part of the present invention. The base of each carriage has pivoted thereon a lever 13 carrying the shaft 20 of a transverse brush 21, to be r-eferred to later, whilst 12 the carriage parts 9 have lugs 14 supporting a horizontal feed table 15 extending across the working width of the machine. Thus the carriage-supported assembly of the roller 5, the brush 21, and the table 15 can be 12 moved as a unit towards or away from the buffing roller 3 to permit the introduction of a skin 50 to be buffed, the removal of a partlybuffed slain, the relcase of a trapped cr pleated skin and so on The actual nip between the 1784,685 This assembly comprises a suction nozzle 31 flanked by compressed air nozzles 32 and 33. The suction nozzle 31 is formed by a casing of rectangular cross section but downwardly convergent outline form, as seen in Figure 4, 70 whilst the compressed air nozzles 32 and 33 have casings of upwardly tapered cross section and are of smaller dimension from top to bottom than the suction nozzle 31 As will also be seen, the front and rear walls of the casing 75 of nozzle 31 form the major part of the inner walls of the respective casings of nozzles 32 and 33, these

latter also being downwardly-convergent as seen in elevation. The mouths of the respective nozzles 31, 80 32, 33 are elongated and extend horizontally across the working width of the machine, and it will be noted from Figure 2 that these mouths are parallel and substantially flush with one another, those of the compressed air 85 nozzles 32 and 33 being in the form of slits flanking the wider amount of the nozzle 31. The nozzle mouths are of substantially equal length and each extends across the complete operating width of the machine 90 The suction nozzle casing is divided up internally by inclined baffles 47 extending between the front and rear walls of this casing and intended to equalise the suction airflow, and at its lower and constricted end 95 the nozzle casing is connected through ducting 34, including a horizontal duct 35, to a suction source. A centrifugal fan 36 is mounted at the rear of the machine on a supporting structure 37 100 The impeller side of this blower communicates through ducting 38, having branches 39 (see Figure 1), with the ends of horizontal ducts 40 and 41 which are respectively disposed along the bottoms casings of nozzle 32 105 and 33 in communication therewith. Internally each of the casings of the compressed air nozzles 32 and 33 is divided up by inclined partitions 42 into four flared distributor channels 43, each having some four 110 spreader plates 44 disposed in radiating fashion therein and extending from the front to the rear walls of the nozzle concerned, such that compressed air entering the corresponding channel 43 is distributed evenly along the 115 mouth of this channel. As will be clearly seen from Figure 4, each of the distributor channels 43 communicates with its duct 40 or 41 through an opening 45, and in the case of the first three of these open 120 ings 45 a deflector plate 46 is disposed in the path of the compressed air passing along the duct 41, these plates 46 being disposed so as to provide communicating openings for the air from duct 41 to the successive distributor chan 125 nels 43 which increase in size along the direction of flow of the compressed air from the inlet end of the duct Further, the inlet passages from the openings 45 are also of progressively increased size in this direction; 130 rollers 3 and 5 is determined by the setting of the plunger 10, the carriage section 9 always taking up the same working position by reason of the abutment of a lug 16 thereon against the corresponding upright 2. The outward and inward movements of the carriages 8, 9 are controlled from a treadle 17 which is articulated at its ends to levers 18 in turn fast with a cross shaft 19 mounted at its ends in uprights 2 Secured to each end part of shaft 19 is a lever 53 which is

articulated to an adjustable link 54 in turn connected to a bellcrank lever 55 The outer end of the upper arm of the latter is ball-headed, as at 56, and engages in a seat in the carriage 8, 9 Downward pressure on the treadle 17 moves the carriage assembly outwards, and the latter is moved in to its working position by counterweights 57 secured to the spindle 19 by joints 58 The lever and linkage systems 53-55 are disposed within the uprights 2. Rotation of the rollers 3 and 5 and of the brush 21 is imparted from a driving belt 59 which runs around a pulley 60 mounted at the left hand end of the machine on the shaft 4. At its opposite end the shaft 4 carries a pulley 61 which, through a belt 62 transmits the drive to a further pulley 63 at this end of the machine A shaft 72 carrying pulley 63 transmits this drive through gear pinions 64 and 65 to the shaft 66 of a further pulley 67 and this, through a belt 68, operates a pulley 69 on the shaft 6 of the roller 5 The latter is thus positively driven but at slower rate than the buffing roller. The belt and pulley gearing 61-69 is disposed at the outer side of the right-hand upright 2 and is housed in a casing 70 The pinions 64 and 65, however, form part of a transmission gear which is disposed in a housing 71 on this upright Thus, the shaft 72 also carries a pinion 73 of this gear, this pinion meshing with another, 74, loose on shaft 66 and carrying a pulley 75 which, through a belt 76, turns the brush shaft jockey pulleys 77 and 78, mounted on spring-pressed rocking levers 79, control the tension of the belt 76, whilst a similar function is performed for the belt 62 by a jockey pulley 80. The brush 21 is intended, when the machine is working, to rotate in contact with the surface of the roller 5 and to maintain the latter in clean condition This brush 21, as will be described below, also has the function of assisting the guidance of the travelling skin 50. Mounted below the brush 21, and supported at the front of the machine by a cross brace 26 of the latter, is an inclined table 27 for delivering a buffed skin from the machine A further bracing cross piece 28 is arranged at the rear side of the machine and this serves, through brackets 29 and with the assistance of upright struts 30 mounted on the base 1, to support a dust-loosening and extracting air assembly in the machine. 784,685 whilst the size of the duct 41, which is generally of square cross section, is reduced in stages between successive channels 43 All these factors together produce an -qualisation of the compressed air flow along the length of the nozzle mouth. The mouth of the suction nozzle 31, as will be seen from Figure 2, is inclined at about to the vertical and is equipped with a series of parallel bars 48 which are carried by rods 49 and each of which

extends across the width of the mouth of this duct These bars are slightly inclined, as seen in the vertical plane (Figure 1), and are regularly spaced so as to define a series of slot-like openings at the mouth of nozzle 31. In use the skin 50 is fed into the machine by hand over the table 15 and first passes between the roller 5 and an auxiliary roller 51 which controls the infeed The roller 51 is loosely rotatable in arms 81 pivoted to the end uprights 2, such that this roller is merely weight-biassed against the roller 5 It is disposed in a hood 52 which is connected through a casing 53 with the duct 34, and thus with the suction source, this providing an auxiliary means for removal of dust finding its way to the upper side of the rollers 3 and 5 during the buffing operation. The skin then passes between the rollers 3 and 5 and the buffing operation takes place thereon The buffed skin descends more or less vertically from the nip between rollers 3 and 5 into contact with the brush 21, and it will be noted from Figure 2 that this brush is disposed so as to ensure that the skin is resiliently applied against the bars 48 at the mouth of the suction nozzle 31, i e so that the brush Vill not obstruct a limited billowing of the skin It will also be observed that the compressed air from the nozzle 32, located alongside the path of the skin and in advance of nozzle 31, is directed between the descending skin and the roller 3, and in a direction counter to the direction of travel of this skin and tangentially or substantially tangentially to the roller periphery, thereby to assist in contesting any tendency of the skin 5 to wrap around roller 3 instead of travelling downwards as required This tendency varies with the thickness of the skin At the same time the air from nozzle 32, striking the buffed surface of the skin 5 at an oblique angle, loosens much of the dust therefrom, and this dust is drawn into the nozzle 32 by the suction in the latter There is a limited billowing of the skin at this point. As the skin travels over the guide surface provided at the mouth of nozzle 31 by the bars 48, its direction of travel is at a slight angle to that of the bars, and this ensurjs that every surface element of the buffed side of the skin passes over a slot-like opening at some stage in its travel, thus precluding any chance of strips of dust being left on the skin. From the point of its application between the brush 21 and the mouth of nozzle 31, the skin undergoes a change of direction to the delivery table 27, and between the suction nozzle and this table it is subjected to a further 70 stream of compressed air from the nozzle 33 to remove any dust which may still adhere to the skin As will be seen from Figure 2, by virtue of the change in direction of the skin

between the parts at which the compressed air 75 streams from nozzles 32 and 33 are applied, these streams are therefore directed at different angles to the skin surface and this is found to promote the dust extraction.


* GB784686 (A)

Description: GB784686 (A) ? 1957-10-16

A gripper for a cleaning device such as a cloth, mop or sponge


PATENT SPECIFICATION Date of Application and filing Complete Specification: April 15, 1955. 784,686 No 10910/55. Complete Specification Published: Oct 16, 1957. Index at acceptance,:-Class 61, K 4 C. International Classification:-A 471. COMPLETE SPECIFICATION A Gripper for a Cleaning Device such as a Cloth, Mop or Sponge I, Kk Ri L WEGER, of Austrian Nationality, of 32, Prinz Eugenstrasse, Vienna IV, Austria, do hereby declare the invention, for which I pray that a patent may be S granted to me, and the method by whieh it is to be performed, to be particularly described in and by the following statement:This invention relates to cleaning appliances, more particularly to a gripper for a cleaning device such as a cloth, mop or sponge. Cleaning appliances are known in which a handle carries two gripping jaws for the cleaning device and in which one jaw is pivoted and is held in gripping position by the force of a coil spring whilst the

other jaw rigidly fixed to the handle, is inclined to enable a brush fixed to the underside of said jaw to be used In such known appliances the spring was arranged in the longitudinal plane of symmetry and imparted to the appliance an excessive overall height in the inclined position. Cleaning appliances are also known having a T-shaped head and a U-shaped yoke displaceable in the direction of the handle and having a cross member bearing in the gripping position against the head fixed to the handle In such construction, the ends of the limbs of the yoke are linked to a tightener lever and two coil springs are disposed on both sides of the handle and connected to parts of the tightener lever which are of variable length With such an arrangement the connection of the springs to the tightener lever is such that the distance whereby the springs are compressed equals the distance by which the yoke is opened, so that the gripping force varies considerably with the thickness of different cleaning members. It is an object of the present invention to provide a cleaning appliance utilising a pivoted spring urged jaw g Tipper for a lPrice 3/61 cleaning member as above set forth in which a firm grip is obtained under all normal conditions, and in which the overall height of the appliance is kept to a minimum, enabling same to be used be 50 neath low articles of furniture Other objects of the invention will become apparent as the specification proceeds. According to the invention, there is provided a gripper for a cleaning device such 55 as a cloth, mop or sponge, having a socket for receiving a handle a fixed jaw rigid with said socket, a movable jaw pivoted to said socket for co-operating with said fixed jaw to grip said cleaning device between 60 said jaws, and coil spring means strainable to urge the movable jaw into gripping position against said fixed jaw, characterised in that said coil spring means are arranged on opposite sides of the socket 65 and that means are provided connecting said coil spring means between the socket, to which said coil spring means are directly or indirectly connected, and a point of said movable jaw spaced from the 70 pivotal axis thereof, said connecting means being arranged to hold said coil spring means strained when the movable jaw is in gripping position so that said coil spring means do not extend above or below said 75 socket when the axis of the socket and the front edges of said jaws are horizontally disposed. Other features of the invention will become apparent as the specifiecation pro 80 ceeds. Three embodiments of the gripper according to the invention are shown in the accompanying drawings, in which Figs 1 and 2 show the first embodiment 85 in side elevation and top plan view, respectively,

whereas Figs 3 and 4, respectively, show two additional embodiments in side elevation. The gripper comprises the two jaws 190 ' 784,686 and 2 The jaw 1, rigid with the socket 4 fitted on the handle end 5, is inclined to the socket axis This jaw also may be constructed so that a brush can be fixed thereto, in known manner The jaw 2 is pivoted to the socket 4 by the pivot pin 3 and consists of a two-armed lever The extensions 6 protruding from the hlub portion tion of jaw 2 form the short lever arm and partly surround the socket 4 in the form of a U-shaped bail At the other end of the socket 4 the tightener lever S is arranged, which is pivoted on pin 7 and preferably comprises two limbs 's, which are arranged on)both sides of the socket. and/or handle and are interconnected at their free ends to formn a U-shaped bail 9 spring-urged against the handle. The extensions 6 of the movable jaw 2 are connected to the limbs 8 of the tightener lever by two teision springs 10 i, which are arrainged laterally of the socket 4 and immetrical wvith respect to a plane extending at right angles to the pivotal axis of the mo-vable jaw, and are hun' at one end in laterally protruding eye lugs 11 of the lever arms 6, on the other end in ligs 12 of the tightener lever 8 Lugs 11 and 12 are spaced from the respective pivotal axes 3 and 7, respectively, by distances which are small compared to the length of parts 2 and 8. According to Figs 1 and 2 the jaw 2 of the appliance is spring-urged into gripping position when the tilghtener lever 8 bears on the handle When the lever 8 is turned up into the dotted position of Fig 1, the springs 10 will relax and the jaw 2 will release the cleaning cloth or the like Due to the lateral arrangement of the springs they do not extend beyond the top of the socket when viewed from the side when the movable jaw 2 is in gripping position Thus the appliance is of very small height when held in a slightly inclined working position, any projeeting parts at its upper edge being avoided For this reason the appliance may be used also in spaces difficult of access, e g, beneath pieces of furniture mounted oin low feet, without inflicting damage to the furniture. In the embodiment of the cleaning appliance according' to the inv,-ention shown, in Fig 3, the jaw 2 and the tightener lever 8 are pivoted on a common pivot 3 fixed to the socket 4 The two tension springs 10 are again disposed on opposite sides of the socket 4 but in this case the tightener lever 8 must be pivotally movable downwardl from the handle The points 11 and 12 where the springs are attached to the extensions 6 of the jaw 2 and to the tighltener lever 8, respectively, are located so as to cause the springs to exercise oppositely directed moments on the jaw 2 and tl e tiehtener lever ll

when the jaw 2 is in gripping position To, release the jawv O from its rippin" position, the tightener lever is depressed uitil tlhe axes of the coil sprilzs 16 pass lirngh 70 the dead-cenfitre position For ripping a serubbing-clloth, mor, or ie like the lever 8 is turned up -w Xhile the fic-d jaw is urged against the floor ti render ei'fetive the force required for straining the slrng 75 An even more simpiilied emroduiment of the appliance is apparent 'fr-m Fig 4. Here the essential feature resides in the fixation of the springs 10 1 the onie hand directly to the socket 4, on the oter hand 80 direttly to the short lever ari 6 -of the pivoted jaw 2 It w-ill le ne i l-at t'ie movable jaw 2 eonstitmes one arm,i a three-armed jaw lev-er, vhih is riv tally emonected to the socket thrfi Joi the pivot 85 ax-is:3 and thle coil sprini mieaus a're 'oineeted at one end to the t: Let a,l a T te other end to a semld arm,the sl e_,t ev-er arm 6 i whilst the third arm I,- nstitntes a lhadl e fot r anipuia, The piw, tai 90 axis of the saidl i, el i S spaetfr, Th the line of pull of the sprin meallns so that zhpen the movable iai is i,,vte olt -i its grippini_ positicn into an open positi ll, the spring ineans plass thiioilh a dead 95 eentre position As w Vill Ie seen -irorn Figr. 4 the moment exercised 1-t the spints 1) on the jaw 2 acts in the clo vise sense i the grippino positim'-l, ii the aiti 1, l ise sense in the open positu, For turnia 100 the jaw 2 from one po Skitni into the other, the third lev er arm 14 is used this servillng as a handle hinch is desirally also arranged laterall: tf the socktet 4 and the hliandle end 5 so that it does not interfere 108 with the use of the appliance It is sufieient to provide that handle, which replaces the tightener le er only on one side of the socket If the handle 14 is turned upwardly in the sense ouf the arrow thle 110 springs 10 are pulled beyond their deadcentre position and the jaw 2 assumes its open position. Thus it is apparent that all three embodiments shown in the hrayh' c omprise 115 means connectimn the coil springo eaar 10 between the sokfet 4 and a point,,if the movable jaw 2 sraed fr,-, the piviotal axis 3 thereof In Fis 1 to 3 said eonnecting means consist of the linking mieans 120 11 at one end of springa 10 and of the linkinn means 12 at lthe other e 1nd ol the springs 10 towerther ith the ti"lfenler le-ver and tlie pin 7 in Figs L 2 ' in Fir 3 h-ere it is,-nlle-t,1 1 t' so 6-ie 1 4 125 In Fig ' said eonneev i e means consist if the linini mieas 11 i al 13 All Tilese lilnkino lreans are ari 'edl to lled the A oil sprint hteans 1-i laterall-: s;-kel' 4 and to hold them srai ned within the ralnge 130 784,686 of the contour of the socket when seen in the direction of the pivotal axis 3 of the movable jaw 2 when the latter is in gripping position. One of said linking means is rigid with the tightening means pivoted

to the socket. In Figs 1 to 3 the linking means 12 is rigid with the tightener lever 8, in Fig 4 the linking means 11 is rigid with tightener lever 14 These linking means rigid with the tightening means are movable by the latter into a dead-centre position, in which the pivotal axis ( 7 in Figs 1, 2; 3 in Figs 3, 4) on which said tightening means is connected to the socket 4 is intersected by an imaginary line connecting the points where said coil spring means on (ne side of said socket are connected to said linking means when the movable jaw and tightening means are in their gripping and final straining positions, respectively. An advantage common to all embodiments described hereinbefore resides in the arrangement of the springs and handoperable lever laterally of the socket and/ or handle so that the appliance is of a low overall height and can be made in a very simple construction The basic principle of the appliance is not changed when oempression springs are replaced for the tension springs.


* GB784687 (A)

Description: GB784687 (A) ? 1957-10-16

Improvements in or relating to lifeboats


PATENT SPECIFICATION Inventor: IVAN RUPERT FLEMING 784,687 Date of filing Complete Specification April 13, 1956. Application Date April 28, 1955. Complete Specification Published Oct 16, 1957.

Index at Acceptance:-Class 113, A( 11: 27: X). International Classification: -B 63 d. COMPLETE SPECIFICATION Improvements in or relating to Lifeboats We, I R FLEMING & COMPANY LIMITED, a British company, of 734, Tower Building, Water Street, Liverpool, 3, in the County of Lancaster, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention is for improvements in or relating to lifeboats and is particularly applicable to lifeboats which may be driven by a screw propeller. According to the present invention there is provided a lifeboat having a hull with both its ends of substantially the same shape and a heel-bar or main frame which, below the hull of the boat, tapers relatively to the bottom of the boat from the stern to the stem or is deeper at the stern than at the stem so as to compensate for loss of draught or increased buoyancy at the stern and ensure that when the boat is fitted with a propeller said propeller will be effectively immersed even when the boat is in a light condition. In carrying the invention into effect the rake or angle of the stem of the boat will generally be increased beyond the normal so as to make it substantially the same as that of the stern It is also possible with the construction according to the present invention to increase the rake or angle of the stern beyond the normal This ensures that a screw propeller when fitted will be housed well under the gunwale-line for protection. According to a further feature of the present invention there is provided a method of making a lifeboat which comprises shaping both sides of the hull of the boat separately with substantially identically shaped ends on or with the same or a similar mould, die or template and securing or bonding the two sides of the boat together at or adjacent the longitudinal centre line thereof, with a main frame or keel-bar set relatively to the bottom of the boat so that it tapers from the stern to the stem to compensate for loss of draught or increased buoyancy at the stern and ensure lPricx 3 s 6 d 1 that when the boat is fitted with a propeller said propeller will be effectively immersed even when the boat is in a light condition. It will be appreciated that without some adjustment or modification of the positioning of the main frame or keel-bar the boat, if both ends are the same, would normally float in such a position that the propeller would not be effectively immersed The present invention overcomes this possibility whilst at the same time allowing both ends of the boat to be made of the same shape, which greatly facilitates

the construction of the boat because the same templates can be used for marking out the plates or planks for both sides of the boat or the same moulds or dies can be used for both sides of the boat when such sides are moulded or pressed to shape, e g from bonded fibre glass This is of particular advantage where a complete side of a boat is moulded or pressed to shape in one piece and therefore a very large mould is required Prior to the present invention it was necessary to provide two separate moulds one for one side of the boat and one for the other side, because clearly, if both ends of the boat are different then two halves from the same mould will not mate together to form a complete hull. Two specific embodiments of boats in accordance with the present invention will now be described by way of example with reference to the diagrammatic drawings accompanying the provisional specification In the drawings:Figure 1 is a longitudinal sectional view of one embodiment; Figure 2 is a similar view of a second embodiment, and Figure 3 is a typical cross-section of a boat according to the invention. In all the figures of the drawings the reference numeral 10 indicates the hull or skin of the boat, 11 indicates the main frame or keelbar, 12 indicates the stem, 13 the stern post and 14 the skeg. In the embodiment of the invention shown in Figure 1 the main frame or keel 11, under . No 12229/55. 784,687 the bottom of the boat,' is given a rake or downward inclination from the stem to the stern relatively to the level or horizontal bottom-line or rabbet-line 10 a of the hull so as to ensure complete or almost complete immersion of the propeller even when the boat is floating in the light condition. In the embodiment of the invention shown in Figure 2 the main frame or keel-bar 11 tapers, under the bottom of the boat, relatively to the "rabbet-line" O 10 a, from the stern to the stem so as to ensure complete or almost complete immersion of the propeller even when the boat is floating in the fight condition. The stem 12 of the boat may be formed as a separate piece welded to the main frame or keel-bar 11 or it may be bent to shape as an integral continuation of the main frame or keel-bar A strengthening gusset 15 may be provided between the main frame and the stem as necessary Similarly, the stern post 13 may, in some cases, be an integral bentup extension of the keel-bar or main frame 11. The main frame 11 and stem 12 have a bracket 16 secured to them for attachment of the lifting hook and for a similar purpose a bracket 17 is also secured between the main frame 11 and the stern post 13 The latter bracket also carries a dow-nwardly inclined bearing 18 for the propeller shaft.

The main frame or keel-bar 11 may be cut to shape from plate or may be formed from an extruded bar, e g a bar of aluminium or aluminium alloy extruded to the required section Conveniently the sides of the boat have an edge flange as indicated at 19 in Figure 3 by which they are rivetted, clamped or otherwise secured on opposite sides of the main frame, stem and stern post. The boat shown in the drawings may, for example, have its sides moulded to shape from laminated bonded fibre glass or other plastic material or it may be pressed to shape from aluminium, steel or other metal plate The whole of each side of the boat may be moulded or pressed to shape trom a single sheet, layer or multiple ply of material. The main frame or keel bar 11 ea be made from steel or other metal instead of aluminium or from some other material (e g. fibre-glass or plastic) extruded, rolled, moulded or otherwise formed to the required shape. Similarly, other parts (e g seats and thwarts) or fittings of the boat may be moulded or pressed to shape from, for example, fibre-glass or plastic.


Healthcare

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