The Rock Drills that are Speeding

In the white circleabove is a "scaler"high on a cliff in

Blac~ _Canyon.The inset shows aType 5-49 "Jac~-hamer" used in

this wor~. On theopposite page is adrilling crew atwor~ in a tunnelheading. They areusing N..-75 drift-

ers. as shown inthe inset.

INGERSOLL-RAND COMPAN~ 11 BROADWAY, NEW YORKATLANTABIRMINGHAMBOSTONBUFFALOBUTTE

CHICAGOCLEVELANDDALLASDETROITDENVER

DULUTHEL PASOHARTFORDHONOLULUHOUSTONKNOXVILLE

LOS ANGELESMANILANEWARKNEW ORLEANSNEW YORKPHILADELPHIA

PICHERPITTSBURGHPOTTSVILLESAN FRANCISCOSALT LAKE CITYSCRANTON

SEATTLEST. LOUISST. PAULTULSAWASHINGTON

Adv. 6 Compressed Air Magazine, January, 1932

Dunllet

Intake Filter

ProtectomotorPipe Line Filter

Delivers clean dry air,free from dust, water, oil,rust and scale, for paintspraying, compressed airtools, hoists, cleaning op-erations, agitating liquids,etc.

Cylinders, pistons and other moving parts of machines and tools thatuse compressed air are quickly eaten into by the billions of sharp, abrasivedust particles in unfiltered air.The Protectomotor Air Filter stops 999 of every 1,000 dust particles

from getting into machines. Consequently it reduces wear 75 to 85% andkeeps machines running 3 to 5 times longer before overhauling is necess-ary.

It eliminates three-quarters of the work and expense of cleaning carbonand grinding valves. It cuts ail consumption 25% and saves compressedair. And it muffles suction noises of compressors and exhaust noises ofvacuum pumps.

Frequently the Protectomotor saves enough in one month to pay foritself.

The Protectomotor passes air through a dry filter medium of negligibleresistance and its efficiency is not reduced by collected dust. It operates

from six months to a year without cleaning and can be cleanedquickly with compressed air without removing the filteringunit.Has no moving parts and requires no duct work, roofing

baffles, cleaning tanks or adhesives.More than 35,000 of these filters are in use. Let us send you

one on 30 days' free trial.

STAYNEW FILTER CORPORATION

7 Leighton Ave. Rochester, N. Y.

Staynew Filter Corp.,7 Leighton Ave., Rochester, N. Y.Without obligation on our part, you may:nSend a copy of your catalog.o Send a Protectomotor for use on .If not satisfactory after 30 days' service, it may be re-

turned for full credit.Name .Address .

iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiil City State. .. . .-----------------------------

Compressed Air Magazine, January, 1932 Adv• .5

...•

Operations on the Hoover DamWorkPreparations for the actual building of HooverDam consist largely of rock drilling operations.Hundreds of thousands of cubic yards of rock mustbe moved in building highways and railroads, inscaling canyon walls of loose material, and in driv-ing the four 56-foot diversion tunnels which willcarry the river past the dam site during the periodof construction.

With a view to speeding up all these manifold

tasks, Six Companies, Inc., contractors on this$49,000,000 job, chose Ingersoll-Rand drills as themost dependable and efficient machines on the mar-ket. The Hoover Dam is the latest in a long list ofmajor construction projects the world over to em-ploy I-R drills.Why not use in your work these same drills that

have been selected for the biggest drilling jobseverywhere? There is a type and size for every rockcondition.

In erson·Raild\

Compressed Air Magazine, January, 1932 Adv. 7

cAN]E~V IDUMPCAR

- .

_. ....~l'-lr.~.'~

",,',.

Announcing The WesternAir Operated END DUMPC.AR

"Western" has scored another sensationaltriumph-sa large capacity, air operated enddump car -. It is a radical departure from allprevious dump car standards and is built extrastrong for hard mining and quarry work. Its

capacity is 20 cubic yards, level full. This newcar is short coupled and compact, and rides thetrack well. There are many uses for this stan-dard gauge end dump car, built for handlingthe heaviest material. Ask us about it.

WESTERN WHEELED SCRAPER COMPANYDump Car and Grading EquipmentAURORA, ILLINOIS, U. S' A.

:.~ I '\ ) 3" ( .0 : I

Adv.8 Compressed Air Magazine, January, 1932