Compressed air . 822,520. -MR-BRAKE. Ed A. Graves, Randolph, Filed Feb. 8, 1906. Serial Xo. 300,—The combination with train pipes or hosehaving coacting couplings upon their adjacent ends, ofstop-cocks or valves arranged in said pipes, operatingelements upon said valves, and a connection betweenone of said pipes and the operating element of thevalve in the other, substantially as described. 822,596. ROCK-DRILL. Arthur H. Gibsox, Easton,Pa., assignor to Ingersoll-Rand Company, XewYork, X. Y., a Corporation of Xew Jersey] FiledDec. 21, 1905. Serial Xo. 292,

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcompres, bookyear1896