US Patent: 272,955
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| Pipe Wrench
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Patentee:
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| Joseph P. Haigh (exact or similar names) - Pittsburgh, PA |
| USPTO Classifications: |
| 81/99 |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Aug. 07, 1882 |
| Granted: |
Feb. 27, 1883 |
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Patent Pictures:
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Joseph P. Haigh patent February 27, 1883 |
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Stan Schulz
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Description: |
| This improvement to Haigh's December 7, 1880 and October 25, 1881 patents (nos. 235,083 and 248,588) incorporates a clock-spring to tension the swinging hook jaw. The patent includes alternate means for adjusting the tension on the spring.
The corresponding Canadian patent (no. CA-17,927) supplies different assignees. |
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