. American engineer and railroad journal . of the valveto receive the ball / on the upper end of the connecting-rod //,the ball being confined in the socket in any suitable manner,as by a gland, .7. The lower end of the rod //is providedwith brasses, /*, for connecting it with a wrist-pin, i, on arocker, /. The brasses cau be adjusted by a wedge, /<, andscrew, ft*. The rocker /is keyed to a shaft. A, journalled in bearings b*integral with the lower portion of the base. The rocker has aworking lit between the inner faces of these bearings, whichare bored out cyliudrically, and are lined with
. American engineer and railroad journal . of the valveto receive the ball / on the upper end of the connecting-rod //,the ball being confined in the socket in any suitable manner,as by a gland, .7. The lower end of the rod //is providedwith brasses, /*, for connecting it with a wrist-pin, i, on arocker, /. The brasses cau be adjusted by a wedge, /<, andscrew, ft*. The rocker /is keyed to a shaft. A, journalled in bearings b*integral with the lower portion of the base. The rocker has aworking lit between the inner faces of these bearings, whichare bored out cyliudrically, and are lined with bushings, /.,turned to an outside tit in the bearings and bored out to suitthe long and preferably taper journals fc on the shaft A. Agas-tight cover, 4;i, incloses one end of the shaft. The otherend passes through a stuffing-box, B3, and is supported in anoutboard pillowr-block, M. The axis of the shaft lies prefer-ably in the plane of the joint b between the upper and lowerportions of the base. Fastened to the shaft outside the base is. FARNSWORTHS GAS-COMPRE3SING PUMP. a rocker arm, JV, to which may be attached a rod, n, for con-necting it with an engine or other motor. The wrist-pins i and shaft Aare not in line with each other,but the shaft stands above the line joining the pins, so thateach pin is distant from the shaft more than half the distancebetween the axes of the cylinders A. The proportions aresuch that when a piston is at the bottom of its cylinder, as atthe right of fig. 2, the angularity of the rod is the greatest ;but when the piston has made half its up-stroke, the pin i in-tersects the axis of the cylinder, and the rod coincides withsaid axis. The continued upward movement of the rockerarm swings the rod slightly outward for the next quarter ofthe stroke, but during the last quarter the rod again ap-proaches a central position, which it reaches at the end of thestroke, as seen at the left of fig. 2. The dotted lines in thisfigure show the paths of the pins
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
