US Patent: 455,872
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| Valve Gear for Engines
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Patentees:
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| Ellis J. Woolf (exact or similar names) - Minneapolis, Hennepin County, MN |
| John Peebles (exact or similar names) - Minneapolis, Hennepin County, MN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 13, 1890 |
| Granted: |
Jul. 14, 1891 |
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Joel Havens
"Vintage Machinery" entry for Buffalo Pitts Co.
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Description: |
| Abstract:
Our invention relates especially to that class of valve-gears described in the United States Letters Patent issued to us of date July 30, 1889, numbered 407,806, and in the pending application of Ellis J. Woolf, under Serial No. 348,662, filed April 19, 1890, and allowed November 14, 1890. It was designed in order to get the best results on traction and some other forms of engines; but the improvement is also capable of general application to some other forms of valve-gear. It has for its object to provide an additional means of further overcoming the obliquity of the main rod with a view of obtaining a more equal distribution of the steam. This is done by extending the eccentric-rod from the strap in the opposite direction to the main rod from the crank, thus reversing their angularities and obtaining necessary compensation. In order to transfer the motion from the outer end of the eccentric-rod to the valve, a suitable transfer or directing device is provided adapted to support the outer ends of both the eccentric-rod and the valve-rod. This directing or transferring device may be either a straight-line guide or a pivoted rocker. If the eccentric be placed opposite the crank, the connection from the directing or transferring device to the valve must be direct. If, however, the eccentric be placed in line with the crank, the connection must be indirect, which can be readily effected by making the pivoted rocker a reversing-rocker or by making the transferring device in any other suitable form adapted to reverse the motion in its transmittal to the valve.
Claim:
In a valve-gear, the combination, with the crank and the main rod, of an eccentric, an eccentric-strap, an eccentric-rod extending from the strap in a direction opposite from the main rod, and a directing device for supporting the outer ends of the eccentric-rod and the valve-rod and transferring the motion to the valve. |
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