US Patent: 352,528
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Die For Forging Wrench Heads
Dies for Forging Metal
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Patentee:
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| G. Frank Evans (exact or similar names) - Portland, ME |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 14, 1886 |
| Granted: |
Nov. 16, 1886 |
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Patent Pictures:
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G. Frank Evans patent November 16, 1886 |
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Stan Schulz
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Description: |
| The die described in this patent would form the "socket" portion of the "Diamond" or "Portland" wrench. Early versions of the wrench were made of malleable iron or cast steel; later production used forgings.
Patent nos. 234,091 and 286,653 are for the wrench. Mr. Libby was general manager of the Diamond Wrench Company. |
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