. American engineer and railroad journal . g cars used in this coun-try with couplers of the .lanney and Sliller type, the couplersand buffers are usually so ananged that when the cars arecoupled, the s])rings that force the buffers out are compressedto a certain extent, thus forcing the buffer together and tend-ing to hold the cars steady. Tlie amount of this conqjiessionand the subsequent pressure upon the butfers is, however,limited, since in order to effect a coupling the cars must bedriven together with sutflcient force to compress the buffersprings and allow the couplers to engage. If th
. American engineer and railroad journal . g cars used in this coun-try with couplers of the .lanney and Sliller type, the couplersand buffers are usually so ananged that when the cars arecoupled, the s])rings that force the buffers out are compressedto a certain extent, thus forcing the buffer together and tend-ing to hold the cars steady. Tlie amount of this conqjiessionand the subsequent pressure upon the butfers is, however,limited, since in order to effect a coupling the cars must bedriven together with sutflcient force to compress the buffersprings and allow the couplers to engage. If the springs aretoo stiff this impact is loo great, and will not only damage thecars, but will cause disairreeable shock to the passengers. Insome systems the coupler and buffer are so connectedby leversor pressure-bars that, as the coupler is pulled forward, themotion is transmitted to the buffer, and the opposing buffersare thus pressed together with greater force. In this case,however, the amount of pressure that can bo put on the buffers. LEONARDS HYDROSTATIC BUFFER. The object of this buffer is to provide means of holdingadjacent cars firmly together, thus increasing the friction be-tween the buffers and lessening the amount of oscillation dueto curves and uneven tracks. In the different views on the drawing the same letter refersto the same part. Two center cylinders, E and F, cast in onepiece, are firmly secured between the center sills of the cjliuder E is tilted with a ram //. which is forced outwardagainst a cross head pressing against the spring R, whii^litransmits the pressure lo the buffer P. The cylinder V istilted with a ram .7, which is forced against the pressure-bar pressure-bar is secured to the back end of the draw pressure is admitted to cylinder F by the pipe 0, theram ,/is driven back and the draw-head is drawn in. At time the pressure passes through the port shown lo thecylinder fiand forces the buffer P outward ; thus the
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
