US Patent: 664,025
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| Gas Engine
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Patentee:
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| Lewis H. Nash (exact or similar names) - South Norwalk, Fairfield County, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 01, 1897 |
| Granted: |
Dec. 18, 1900 |
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Joel Havens
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Description: |
| Claim:
An air and gas mixing device provided with concentric ports alternately communicating receptively with the air and gas supply and a valve composed of similar concentric rings and ports adapted to cover the admission-ports. |
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