US Patent: 392,152
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| Wrench
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Patentee:
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| John Alfred V. Gyllenberg (exact or similar names) - Hecla, MT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 28, 1888 |
| Granted: |
Oct. 30, 1888 |
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Patent Pictures:
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John Alfred V. Gyllenberg patent October 30, 1888 |
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Stan Schulz
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Description: |
| The movable jaw adjusts by a clamping lever and fine rack teeth on the shank. The lever includes a small locking tooth.
The supplemental adjustment on the jaw surface is to make finer adjustment than is possible with the rack teeth on the shank. |
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