US Patent: 287,998
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Wrench
Automatic Self-Setting Wrench
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Patentee:
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| Benjamin F. Bennett (exact or similar names) - Lockport, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Sep. 08, 1883 |
| Granted: |
Nov. 06, 1883 |
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Patent Pictures:
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Benjamin F. Bennett patent November 6, 1883 |
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Stan Schulz
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Description: |
| The adjusting mechanism is a pair of spring-loaded rollers in tapered chambers within the movable jaw. They hold an adjustment by wedge action. The ends of the rollers have thumb buttons to pull them back and release their grip. The specifications note that the wrench only needs one roller & chamber, to resist "backward" pressure.
Improved by patent no. 323,776.
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