US Patent: 587,974
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| Lock Jaw Wrench
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Patentees:
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| Elmer L. Keith (exact or similar names) - Mount Vernon, IA |
| James Evan Colton (exact or similar names) - Mount Vernon, IA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 31, 1896 |
| Granted: |
Aug. 10, 1897 |
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Patent Pictures:
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Elmer L. Keith and James Evan Colton patent August 10, 1897 |
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Stan Schulz
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Description: |
| Improvement to Keith's Sept. 15, 1896 patent (no. 567,945).
An extension on the lever handle has teeth that are engaged by a sliding latch to hold the adjustment once the jaws close on the work piece.
The adjustable movable jaw is free to slide for size adjustment until clamped by gripping teeth on a yoke that engage rack teeth on the shank of the movable jaw. |
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