US Patent: 621,526
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| Gas Motor Engine
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Patentee:
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| John H. Hamilton (exact or similar names) - Sandiacre, Derby County, England |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Dec. 28, 1897 |
| Granted: |
Mar. 21, 1899 |
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Joel Havens
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Description: |
| Patented in Great Britain, 07 Nov., 1893, #21,120
Claim:
This invention relates to four-stroke-cycle gas-engines of the scavenger-charge kind, for which a British patent, No. 6,015 of 1890, was granted to me. In these engines a charge of air is employed to scavenge or sweep out the products of combustion from the motor- cylinder after each working stroke, a two-diameter or differential piston working in cylinders of two diameters placed in line with each other serving as both motor and air- pump, being adapted to draw air into the larger part of the cylinder during the outward stroke and discharge it through the combustion - chamber during the exhaust, stroke or a part thereof; and the essential feature of this invention is the combination of such a differential piston and cylinder and another motor cylinder and piston placed in line or "tandem" with the differential cylinder, the piston of the second motor-cylinder being connected to the enlarged end of the differential piston by means of rods at each side, and the space in the air-pump being in communication with the back of the, admission-valves of both motor-cylinders by means of a passage, preferably consisting in part of a detachable tube adapted to act when in place as a tie between the motor-cylinders. |
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