US Patent: 645,293 
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| Gas Engine
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	        Patentee:
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 | Albrechit Heil (exact or similar names) - Frankfort-on -the Main, Darmstadt Region, Hesse, Germany |  
 
 
 
 
 
| Manufacturer: |  
| Not known to have been produced |  
 
 
 
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        Patent Dates:
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| Applied: | 
May 24, 1899 | 
 
| Granted: | 
Mar. 13, 1900 | 
 
 
 
USPTO (New site tip) Google Patents 
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                        Joel Havens 
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        Description: |  
| Claim:
In a gas-engine, the combination of the cylinder, working piston, valve controlling the admission of the explosive mixture to the cylinder, a rod e connected directly to the piston to move therewith. and projecting beyond the end of the cylinder, a spring-pressed hinged rod h connected to the rod e to move therewith, a rod p extending from the valve, a spring normally tending to seat the valve, catches carried respectively by the rods h and p and arranged to engage each other on the outstroke of the piston to open the valve, and means to lift the rod h to disengage the catches at a predetermined point of the stroke, substantially as set forth. |  
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