US Patent: 197,253
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| Improvement In Wrenches
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Patentee:
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| Calvin H. Covell (exact or similar names) - Stockton, CA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 17, 1877 |
| Granted: |
Nov. 20, 1877 |
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Patent Pictures:
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Calvin C. Covell Pat. November 20, 1877 |
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Stan Schulz
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Description: |
| This combination quick and screw-adjust nut wrench has a "mutilated nut" at the base of the adjustable jaw which can be toggled to engage or disengage a half-threaded "stem." The "stem" can also can be advanced or retracted a short distance by an adjusting screw threaded into the ferule. |
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