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Start′ing-valve.


Steam-engine.) a. A device introduced by Bourne in 1852. A small valve used in starting the main valves of large steam-engines when setting the engine to work.

Starting-valve for Gifford injector.

Bourne, in 1836, introduced small cylinders to move the link motion which controls the action of the valves of the main engine.

b. A valve adapted for the Giffard Injector. It has an interior valve a and a larger valve b. The range of the former relatively to the latter, in which is its seat, is regulated by the play allowed by the nut c. Opening of the valve a, by pulling the lever e, allows a small but sufficient body of steam to pass, to raise the water.

Another pull opens the valve b and starts the injector.

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John Bourne (2)
Gifford (1)
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