US Patent: 754,547
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| Throttle-Valve
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Patentee:
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| John Desmond (exact or similar names) - Cincinnati, Hamilton County, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 14, 1903 |
| Granted: |
Mar. 15, 1904 |
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Patent Pictures:
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Joel Havens
"Vintage Machinery" entry for William Powell Co.
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Description: |
| Abstract:
The leading object of this invention is to so nearly balance this valve by the steam-pressure, as to render its operation and control convenient and delicate, permitting also a quick manipulation, if necessary, and prevent all possibilities which would hinder a free and ready movement and easy lift. Another object is to prevent wear by the eroding and abrasive action of the steam, which cuts the metal when such steam at the time the valve is nearly closed rushes through the contracted space in a thin stream or sheet.
Claim:
In a throttle-valve, the combination of a valve-housing, a main valve therein, a cylinder open at both ends connected so as to move with this valve and forming with adjacent parts of the valve-housing a movable valve-chamber which is normally closed, an auxiliary valve permitting access of steam to this valve-chamber, a valve-stem to manipulate this auxiliary valve and operative connection between it and the main valve whereby by extended manipulation of the auxiliary valve the main valve is also opened. |
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