. American engineer and railroad journal . g wearsand the space is increased the shot fall into it, and thus, byinterposing a solid substance between M and L, prevents theaxial movement of the packing rings. In his specification Mr. Cole shows and describes severalother methods of holding the packing rings in their placeafter they become worn, but the one described seems to be thepreferable plan, and is certainly very ingenious. Mr. Colespatent is numbered 526,381, and dated September 25, address is Mount Clare, Baltimore, Md. beches pneumatic hammer. This invention refers to pneumati
. American engineer and railroad journal . g wearsand the space is increased the shot fall into it, and thus, byinterposing a solid substance between M and L, prevents theaxial movement of the packing rings. In his specification Mr. Cole shows and describes severalother methods of holding the packing rings in their placeafter they become worn, but the one described seems to be thepreferable plan, and is certainly very ingenious. Mr. Colespatent is numbered 526,381, and dated September 25, address is Mount Clare, Baltimore, Md. beches pneumatic hammer. This invention refers to pneumatic hammers, in which thehammer-head proper is formed by a heavy cylinder containinga piston, and in which this latter is employed for operatingsaid cylinder or hammer-head ; and the improvements relateto means for altering the height of stroke of the head, andalso to means for automatically replacing the air for the upperair-cushion, if the quantity of the aii of this cushion hasbecome a too small one or has entirely been displaced. FIG BECHES PNEUMATIC HAMMER. The frame a of the pneumatic hammer (fig. 5) holds on itstop the shaft b in the two bearings a a?. Said shaft has aneccentric, b, carrying the beam c. This beam may be oscillatedfrom shaft d by means of a crank, e, and connecting-iod /,and transfers its motion to the piston g within cylinder h bymeans of the connecting-rod i and piston-rod k. In order toturn the eccentric 6, or, in other words, in order to raise orlower the beam c by means of the said eccentric, the shaft bhas been provided with a worm-wheel, I, gearing with a worm, m. This latter is dimly connected with a chain-wheel, n, and may be turned from a sleeve, o, by means ofchain-wheel n and chain p. The left-hand end of shaft d carries a sleeve, s, with twoflange-like friction disks, only one of which, s5, is shown, therotations of which latter may be transferred on the sleeve o bythe broad, disk-like end piece o of said sleeve o, so that bycausing contact
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
