. American engineer and railroad journal . urs. 21 minutes, thus establishing a new record. Tensile tests of paper made on the government testing ma-chine at the Watertown arsenal showed that strong blue printpaper has a tensile strength of 9,700 lbs. per sq. in. and X 28 ins., linen paper has over 9,000 lbs. per sq. in. 346 AMERICAN ENGINEER AND RAILROAD JOURNAL. A NOVEL AIR OPERATED FORGE. The Chicago Pneumatic Tool Company, Fisher Building,Chicago, have just placed upon the market a new design ofportable blacksmith forge which is intended to operate by com-pressed air. It differs f
. American engineer and railroad journal . urs. 21 minutes, thus establishing a new record. Tensile tests of paper made on the government testing ma-chine at the Watertown arsenal showed that strong blue printpaper has a tensile strength of 9,700 lbs. per sq. in. and X 28 ins., linen paper has over 9,000 lbs. per sq. in. 346 AMERICAN ENGINEER AND RAILROAD JOURNAL. A NOVEL AIR OPERATED FORGE. The Chicago Pneumatic Tool Company, Fisher Building,Chicago, have just placed upon the market a new design ofportable blacksmith forge which is intended to operate by com-pressed air. It differs from the other forges built by thiscompany in that it is to use with coal or coke, instead of fueloil; fuel oil forges are also a specialty of the Chicago Pneu-matic Tool Company. The compressed air supply for the air forge enters througha hose and a %-in. standard pipe connection; it passes througha 1-16 needle valve jet, forcing the fan to revolve rapidly, andas ths fan is open to the outer air. a blast of free air is con- TlIE NEW Ill I. IIV COMlRESSED AIR. tinually blown through the tuyere. This method of using airto operate the fan, in addition to giving excellent results, ef-fects a considerable saving in the amount of air forge uses either coal or coke, coke giving possiblythe best results. It operates with an air pressure of from GOto 100 lbs., and consumes approximately from .5 to 7 cu. free air per The fan revolves at approximately4,000 at 80 lbs. pressure. It is 3 ft. high over all andthe pan, or firebox, is 20 ins. in diameter x 10 ins. deep. Theforge weighs 114 lbs. complete. THE NEW WAUGH SPRING DRAFT GEAR. The new Waugh spring draft rigging which was on exhibi-tion at the recent M. C. B. convention is illustrated in the ac-companying engravings in genera! construction and in actionin service. The construction considered in detail consists oftwo pocket castings of steel, recessed 1 in. in the timbers andhaving flanged projecti
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
