Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 996
Fig. 396 ance is retarded sufficiently to prevent a dangerous speedin the descent of the car. . Hydraulic Elevators 961 When the valve is moved in either direction to set thecar in motion, water passes from port 12 to port 10 throughside ports 14. A portion of this water passes directly from12 to… … Fig. 397 into 14, as indicated by the arrows. In this way sufficientopening around the throttle valve is afforded even whenthe port of the operating valve piston V is only slightlyopen. The passages 13 and the connection between theports 14 and 10 are not easily made out from Fig. 395, but 962…
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-162-65.webp)
