| US Patent: 445,110 
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| Gas Engine | 
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| Patentee: |  |
 | Marcellus A. Graham (exact or similar names) - San Francisco, CA |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Aug. 20, 1890 |  
| Granted: | Jan. 20, 1891 |  USPTO (New site tip)
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                        Joel Havens
 "Vintage Machinery" entry for M. A. Graham
 
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| Description: |  | Abstract:
My invention relates to certain improvements in what are known as, gas or explosive engines.
Claim:
In a gas-engine, a cylinder with a piston reciprocating therein and a means for supplying gas or explosive vapor to the interior of the cylinder, with inlet-valve, governor, and exhaust-valve, as shown, in combination with a spring-arm projecting into the cylinder and forming one electrode, a horizontal rotary shaft extending through the side of the cylinder explosion-chamber to form the other electrode and having its inner end slotted, a radial arm f, fitted to the slot, and a set-screw by which the arm is secured and its radial length is regulated with reference to the elastic electrode. |  |