Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 237
construction, the valves may be considered cylindrical plugs, of which portionsnear the ports are cut away for the prompt admittance and exhaust of steam; the valvesare fitted on the lathe and the seat by boring. The motion given to the valves is rock-ing, but the valves are not firmly connected to… … Fig. 4->3. Since the lapse of the Corliss patent, it may be considered the most popular form ofdesign, and its manufacture has been taken up by many shops, which, while in thematter of valves and cut-off coming within the claims of the old patent, have been muchimproved in the details of…
Mechanical drawing
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