US Patent: 143,367
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| Wrench
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Patentee:
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| Alonzo D. McMaster (exact or similar names) - Rochester, NY |
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Patent Dates:
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| Applied: |
Mar. 06, 1873 |
| Granted: |
Sep. 30, 1873 |
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Patent Pictures:
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Alonzo D. McMaster Patent Sept. 30, 1873 with example (courtesy photo) |
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Stan Schulz
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Description: |
| There are rack teeth on the facing surfaces of the shank and movable jaw. A sliding collar wedges the parts together to hold the adjustment. The tip of the movable jaw slides into a socket in the handle.
A known example is marked only with the patent date. |
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