US Patent: 1,393,534
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| Construction of adjustable spanners, wrenches, clamps, pipe-cutters, pipe-grips, and the like
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Patentee:
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| Frank Humphris (exact or similar names) - Boscombe, England |
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Patent Dates:
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| Applied: |
Jul. 17, 1919 |
| Granted: |
Oct. 11, 1921 |
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Patent Pictures:
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Frank Humphris patent Oct. 11, 1921 |
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Stan Schulz
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Description: |
| The main body is constructed of folded sheet metal; various means are described to complete formation of the body, fixed and adjustable jaws, etc.
Ron Geesin's THE ADJUSTABLE SPANNER shows wrenches produced by Humphris based on corresponding British patent GB-132277, parallel and later improvement patents. |
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