US Patent: 1,508,033
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| Wrench
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Patentee:
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| Thomas B. Tiefenbacher (exact or similar names) - New York, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 21, 1923 |
| Granted: |
Sep. 09, 1924 |
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Patent Pictures:
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1 | 2
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Patent 1,508,033 -- edited drawing |
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Stan Schulz
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Description: |
| A friction spring wrapped around the adjusting nut tends to lessen accidental alteration of the adjustment. The drawings show this applied to both "screw adjust" nut and pipe wrenches. |
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