US Patent: 381,747
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| Valve-gear
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Patent Dates:
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| Applied: |
Oct. 01, 1887 |
| Granted: |
Apr. 24, 1888 |
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Joel Havens
"Vintage Machinery" entry for Passaic Machine Works
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Description: |
| "I construct a compound engine with the cylinders arranged 'tandem,' and having expansion gear of the 'Corliss' type, each steam-valve being rapidly opened by a positive motion at the right period and being rapidly and automatically closed at variable periods, the periods being controlled by a governor, so that when the speed rises both cylinders will cut off earlier, and when the speed diminishes too greatly both cylinders cut off later, so as by the induction of steam to each cylinder for a longer period to raise the speed to the proper point..." |
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