5,149,066

43.40.Tm ISOLATOR WITH IMPROVED

SYMMETRICAL RESPONSE TO SHOCK AND VIBRATION FORCES

Raymond E. Snaith, Max Barrusso, and Eric Jansson, assignors to Aeroflex International, Incorporated

22 September 1992 (Class 267/136); filed 11 February 1991

This roughly spherically shaped isolator consists of a dish-shaped base and a circular plate top, interconnected by a plurality of arched flexural elements made of wire or cable.--EEU

5,149,068

43.40.Tm RESILIENT ANTI-VIBRATION SLEEVE, IN PARTICULAR FOR AN EXHAUST COUPLING

Louis Brandonor, assignor to Societe Jacques Dubois 22 September 1992 (Class 267/147); filed in France 15 March 1990

A cylindrical arrangement of compressed steel wire is held together by a braided metal wire strip that is helically wound around the arrange- ment.--EEU

5,149,090

43.40.Tm VIBRATION DAMPING DEVICE FOR SPORTS RACQUET

Sam H. S. Chen, Poway, CA and F. F. Chang, Taichung, Taiwan 22 September 1992 (Class 273/73 D); filed 30 December 1991

A band made of a flexible material, provided with end hooks and a series of channels, is intended to be "woven" between the strings of a rac- quet in a stretched condition.--EEU

5,109,815

43.40.Vn METHOD AND APPARATUS FOR REDUCING VIBRATION OF CAR BODY

Yuuji Maeda et al., assignors to Hitachi, Ltd. and Nissan Motor Com- pany

5 May 1992 (Class 123/192.1); filed in Japan 27 January 1990

This patent pertains to a means for reducing vibrations of an automo- bile that are caused by engine roughness due to irregular combustion. Changes in the engine's rotational speed are sensed and used via a controller to generate a roll-vibration canceling force on the engine block, e.g., by controlling the torque of an alternator attached to the engine.--EEU

5,134,882

43.40.Yq FIBER-OPTIC ACCELEROMETER

Robert M. Taylor, assignor to Smiths Industries Public Limited Com- pany

4 August 1992 (Class 73/517 R); filed in the United Kingdom 21 Sep- tember 1989

This accelerometer, which is intended to be insensitive to temperature changes, in essence measures the axial deflection of an elastic cylinder duc to axial acceleration. The cylinder is supported at its midlength and has masses mounted on its ends. Two birefringent optical fibers with elliptical cores arc wound around the cylinder in opposite senses on opposite sides of the central support. Light is supplied to one end of both fibers and is sup- plied to photodiodes via polarizers at the other end. Axial acceleration causes extension in one fiber and compression in the other, resulting in equal and opposite changes in birefringence. A processor subtracts the changes in the outputs of the diodes to provide an acceleration signal.--EEU

5,134,883

43.40.Yq PENDULUM-TYPE ACCELEROMETER

E. Paul Shannon, Ki!len, AL 4 August 1992 (Class 73/517 R}; filed 27 September 1990

The intent of this patent is to provide a sensor for angular motion or banking, for indicating the grade, and for accclcration-dccclcration for trucks, cranes, trains, and ships. The sensor consists of a cylinder with four coils mounted in its base at 90 ø intervals and with a pendulum suspended from a top closure plate, frcc to swing over the coils. A damping fluid in the cylinder limits excessive oscillations. Information from the coils is pro- cessed to provide the desired indications.•EEU

5,149,925

43.40.Yq QUICK-RESPONSE ACCELEROMETER

Leonard W. Behr et al., assignors to Automotive Systems Laboratory, Incorporated

22 September 1992 (Class 200-61.45 M); filed 5 September 1990

A cylindrical magnetic seismic mass is located in a cylindrical passage within a housing and is held near one end of the housing by a magnetic bias force. Movement of the magnet away from its bias position, as results when the acceleration exceeds a threshold value, is sensed by means of an electri- cal coil.--EEU

5,149,926

43.40.Yq ACCELERATION SENSO R

Katsuyasu Ono, assignor to Nippon Seiko Kabushiki Kaisha 22 September 1992 (Class 200-61.45M); filed in Japan 8 November

1989

A spherical inertial mass made of a magnetic matcria! is held in a central depression in a disc-shaped member. When the acceleration im- posed on the system exceeds a predetermined value the spherical mass is dislodged and actuates a switch.--EEU

5,121,633

43.40.Yq SEMICONDUCTOR ACCELERoMETER

Koichi Murakami, Hiroyuki Kanedo, and Kraisorn Throngnumchai, assignors to Nissan Motor Company

16 June 1992 (Class 73/517 R); filed in Japan 18 December 1987

This accelerometer, intended to be batch fabricated by semiconductor technology, in essence consists of a plate-shaped mass supported from a frame by a beam whose deflection is sensed by a piezoresistor. Limit stops around the periphery of the plate prevent excessive defiection.--EEU

5,152,172

43.40.Yq OPERATING TURBINE RESONANT BLADE MONITOR

Robert L. Leon and David H. Powell, assigners to Electric Power Research Institute

6 October 1992 (Class 73/579); filed 24 July 1990

One or more acoustic sensors are mounted on the turbine stator, next to a blade row of the rotor. Another sensor is used to provide a rotor position and rotor speed reference signal. The acoustic signals are converted to digi-

3535 J, Acoust. Soc. Am., Vol. 93, No. 6, June 1993 Review of Acoustical Patents 3535

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