Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 305
iliary valve, placethe rocker bar parallelto the piston rod and sothat the arm to whichthe valve rod is con-nected will stand at rightangles to the pistonrod. The auxiliary valve must then cover all the ports equally.The upper or outer end of the arm on the rocker bar is slotted,hence moving the… … Fig. 272. The Steam Pump. 307 THE GUILD AND GARRISON. The steam chest of this pump differs somewhat from otherpumps in which valve pistons are employed to operate themain valve. See accompanying engraving, Fig. 272. Thispump has a steam chest with a cover for inspection and repairs.This chest is…
Hydraulic machinery · Pumping machinery
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