Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments, elementary instruction in practical mechanical drawing together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1883)
st loose distance piecesbetween its inner surface and tlie valve seat. Thisconstruction admits of the valve leaving the seat, ifnecessary, to relieve the cylinder from water, as in theinstance of priming, and also, by tlie reduction of thesepieces, admits of ready adjustment to contact, shouldit… … Fig. 311—Valve Motion. 292 MECHANICAL DRAWING SELF-TAUGHT. cesses are kept in communication with each other bymeans of relief passages in the valve. From this itwill be seeil that the valve is subjected to equal andbalanced pressure on each of its sides, and hence, is inequilibrium. The valve is…
Mechanical drawing
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