| US Patent: 652,724 
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| Gas Engine | 
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| Patentees: |  
 | Charles K. Pickles (exact or similar names) - St. Louis, MO |  | Nathan W. Perkins, Jr. (exact or similar names) - St. Louis, MO |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | May 03, 1897 |  
| Granted: | Jun. 26, 1900 |  USPTO (New site tip)
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                        Joel Havens
 
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| Description: |  | Original application filed 03 May, 1897. Renewed and this application filed 20 Nov., 1899.
Claim:
A gas-engine comprising a cylinder open at one end and having a supply-port, an exhaust-port and an ignition-duct, and a hollow cylindrical piston inside of said cylinder and working over a fixed rain, said piston having ports arranged to register with said supply-port, exhaust-port and ignition-duct, respectively. |  |