US Patent: 27,938
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| Air Engine
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Patentee:
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| W. C. Turnbull (exact or similar names) - Baltimore, MD |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Apr. 17, 1860 |
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Joel Havens
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Description: |
| Abstract:
My object is to make an engine or car that is to be driven by the compressed air, which it carries with it, for street-railroad purposes, the engine or car to be supplied from reservoirs of compressed air at stations where it is prepared previously, and to have this air automatically supplied to its cylinders in uniform' quantities by cut-off that is governed by the pressure of the air in the compartments which carry it, though that pressure he 4 constantly diminishing, and I propose to carry this compressed air in cylinders or in and about the engine or car, as may be most convenient, the space overhead, or under the car, or under the seats, or between the walls of the car.
Claim:
I claim therein as new and desire to secure by Letters Patent is the application to compressed-air engines of an expansion cut-01f which is operated by a positive motion, but the stroke of which is regulated automatically by the pressure of the an m the air holder or reservoir, so as to admit a, volume of air of a certain density directly to and allow it to expand in the cylinder for each stroke of the piston as is necessary to drive the engine at a certain speed. |
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