Compressed air . Claim.—I. apparatus for compressing air hav-ing a low-pressure comj)ressor, a high-pressure com-pressor, a connection between the discharge of thelow-pressure compressor and the intake of the high-pressure compressor, a valve in the connection betweenthe compressors that is closed by an abnormally highpressure beyond the high-pressure compressor, and aninlet-valve connected with the high-pressure compres-sor that is held open, when the pressure between it-self and the valve in the connection between the com-pressors drops below normal as a result of the clos-mg of the connecti
Compressed air . Claim.—I. apparatus for compressing air hav-ing a low-pressure comj)ressor, a high-pressure com-pressor, a connection between the discharge of thelow-pressure compressor and the intake of the high-pressure compressor, a valve in the connection betweenthe compressors that is closed by an abnormally highpressure beyond the high-pressure compressor, and aninlet-valve connected with the high-pressure compres-sor that is held open, when the pressure between it-self and the valve in the connection between the com-pressors drops below normal as a result of the clos-mg of the connection-valve, so as to render the high-pressure piston ineffective for forcing air forwardwhen the connection-valve is closed, substantially asspecified. 819,674. ROTARY PUMP, COMPRESSOR, MOTOR,ENGINE AND LIKE MACHINERY. Ferdi-nand J. RocHow. Brooklyn, N. Y. Filed Oct. 12,1903. Serial No. Claim.— I. Rotary a >paratus of the class describedcomprising a plurality of directly-abutting open-endedcylinders having peripheral inlet and outlet ports: arotatable shaft through said cylinders re-spectively and provided with means to separate saidcylinders respectively; piston devices rotatable withsaid shaft; and connections intermediate the outlet-port of one cylinder and the inlet-port of the adjacentcylinoer, to operate substantiallv in the manner setforth. 819,690. CYCLE-PUMP. David K. Bryson. Pitts-burg, Pa., assignor to Bryson & Howe, Pittsburg,Pa., a Firm. Filed April 28, 1905. Serial ,,726. ENGINEERS EOUALIZING AND DIS-CHARGE BRAKE-VAi:\E. David M. , Ark. Filed Jan. 28, 1905. SerialNo. 243,055. ROCK-DRILL. Henry Hellman. andLewis C. Bayles, Johannesburg, Aug. 10, 1904. Serial No. 220,176.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcompres, bookyear1896
