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Title: |
Nelson W. Twiss, The Twiss Automatic Patent Cut-Off Engine |
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Source: |
The Mechanical Engineer, V11, 08 Mar, 1886, pg. 49 |
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Insert Date: |
7/7/2026 12:27:50 PM |
THE TWISS AUTOMATIC PATENT CUT OFF ENGINE.
Our engravings represent an automatic engine winch has been in use for sums time in certain localities, with excellent results as regards economy and regularity of motion. It peculiarity consists in the valves and valve-motions, which engineers will understand by reference to the engraving. As will be seen, the valves arc at the bottom of the cylinder, thus affording thorough drainage of the same. Also, that the live steam-valve and exhaust-valve are in one piece. On the back of the live steam-valves are the cut-off valves, which are operated in the usual way, by eccentrics in both cases, one stem passing through the other. The cut-off valve, as will be seen by the arrows, has a double port, whereby the travel for the admission of a given volume of steam is much reduced; both cut-off and main valves are under direct pressure, and in engines of large size the eccentric-rod on the main valve has a hook which can be disconnected at once to work the engine backward if required. The automatic regulation of the engine is effected by the interposition of a link, the block in it being raised or lowered by the governor, thus varying the point of cut-off; the range of this is from zero to five-eighths of the stroke of piston. Change of regulation is effected while the engine is running by adding or removing the weights on the governor-bob. These engines have given excellent satisfaction wherever introduced; the mechanical details being of the very best material and superior workmanship. Having no trips, or disengaging apparatus, all parts being positively connected, the repairs required are reduced to their lowest terms. They are built from 20 h.p. to 100 h.p., and are warranted to perform the duty stated for them.
The builder also furnishes small, plain slide-valve vertical engines, and yacht engines with link-motions, of superior quality. Address for pricelists, Nelson W. Twiss, 25 Whitney Avenue, New Haven, Conn.
US Patent: 1,006,808
https://www.datamp.org/patents/displayPatent.php?number=1006808&typeCode=0 |
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The Twiss Automatic Patent Cut-Off Engine
TThe Twiss Automatic Patent Cut-Off Engine, Sectional View
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