Appletons' cyclopædia of technical drawing : embracing the principles of construction as applied to practical design ... (1896)
Worthen, W. E. (William Ezra), 1819-1897 · New York : D. Appleton · leaf 390
y a set screw in thecover which admits of adjustment to varied lifts. Figs. 857 and 858 are the plan and section of adisk-valve for the air pump of a condensing steamengine. The valve consists of a disk of rubber ly-ing on a flat grating or perforated plate of brass,held in position between the… … FIG. 856. between the guard and plate, as will be seen in the figure,being screwed home, is riveted, andthe upper nut usually pinned to pre-vent turning. The size of the aper-tures in the grating are adapted to thethickness of the rubber. With an ex-ternal diameter of opening of 6, and The lower…
Mechanical drawing
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