Compressed air . A pneumatic impact-tool, including a cylinderand piston, a valve-casing having a valve thereinfor controlling the moveinents of the piston, ahead secured to said cylinder and held in fixedrelation thereto and to said valve-casing, ahandle or support upon which said head is ro-talably mounted, said head having a passage formotive fluid which is alternately placed in com-munication with opposite ends of the cylinder, apassage in said handle which may be connectedwith a source of fluid-pressure supply and isaaapted to be placed in communication with said 810,624. PRESSURE-CONTROL
Compressed air . A pneumatic impact-tool, including a cylinderand piston, a valve-casing having a valve thereinfor controlling the moveinents of the piston, ahead secured to said cylinder and held in fixedrelation thereto and to said valve-casing, ahandle or support upon which said head is ro-talably mounted, said head having a passage formotive fluid which is alternately placed in com-munication with opposite ends of the cylinder, apassage in said handle which may be connectedwith a source of fluid-pressure supply and isaaapted to be placed in communication with said 810,624. PRESSURE-CONTROLLrNG DEVICEFOR THE AIR SPRINGS OF PRINTING-PRESSES. Charles P. Cottrell, Westerly,R. I., assignor to C. B. Cottrell & Sons Com-pany, New York, N. Y., a Corporation ofNew Jersey. Filed Apr. 4, 1905. Serial 810,639. ROCK-DRILL. Arthur H. Gibson,Easton, Pa., assignor to The Ingersoll-Ser-geant Drill Company, New York, N. aCorporation of West V^irginia. Filed Tune 9,1905. Serial No. 264, The combination with a rock-drill cylindeihaving a rear extension, of a piston having ahollow tail-rod extended into and entirely in-closed by said rear extension, a sleeve surround- COMPRESSED AIR. 3974 ing the tail-rod forming an annular chamberwithin the rear extension, a rifle-bar telescopingwithin the tail-rod and a port leading from theannular chamber to the air-space within thesleeve and tail-rod. 810,672. DISCHARGE-VALVE EOR FLUID-COMPRESSORS. William Prellwitz, Easton,Pa., assignor to The Ingersoll-Sergeant DrillCompany, New York, N. Y., a Corporation ofWest Virginia. Filed Apr. 1, 1905. Serial ,247.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcompres, bookyear1896
