US Patent: 286,653
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| Wrench
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Patentee:
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| Henry Artemas Thompson (exact or similar names) - Farmington, ME |
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Patent Dates:
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| Applied: |
Feb. 09, 1883 |
| Granted: |
Oct. 16, 1883 |
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Patent Pictures:
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1 | 2
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H. A. Thompson Pat. Oct. 16, 1883 |
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Stan Schulz
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Description: |
| An improvement on Thompson's Nov. 2, 1880 patent (no. 234,091). The patent adds a friction spring inside the moveable jaw, and a detachable supplemental hammer piece. These features are not normally found on the wrenches bearing this patent date. Some wrenches were produced that match the appearance of Thompson's Canadian patent CA-13,865.
See also Canadian patent CA-21,633 for another friction spring applied to the movable jaw of this type of wrench. |
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