US Patent: 719,590
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| Wrench
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Patentee:
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| Robert H. Hearn (exact or similar names) - Dyer, TN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 09, 1902 |
| Granted: |
Feb. 03, 1903 |
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Patent Pictures:
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Robert H. Hearn patent February 3, 1903 |
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Stan Schulz
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Description: |
| The movable jaw is connected to interior threads in the handle by a "stem" with two threaded faces and a thumb lever. The spring at the end of the "stem" within the movable jaw is provide resistance so the thumb lever is not moved accidentally. |
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