US Patent: RE4,450
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| Albert C. Richard's Improved Screw-Wrench
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Patentee:
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| Albert C. Richard (exact or similar names) - Newtown, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Jun. 27, 1871 |
| Reissue Information: |
| Reissue of 27,090 (Feb. 07, 1860) |
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Patent Pictures:
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A.C. Richard Pat. Reissued June 27, 1871 |
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Stan Schulz
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Description: |
| The adjusting screw is behind the adjustable jaw, at the head end of the wrench. The adjusting screw has both left and right hand threads so the adjustable jaw will move quickly.
The "jog" in the main shank resulting from this construction was construed into a "jog bar" shank in the A.G. Coes & Co. wrenches of the 1870s -- see patent no. 122,108. |
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