US Patent: 632,555
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| Wrench For Well-Drilling Tools
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Patentee:
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| Charles L. Dunham (exact or similar names) - Centre View, OH |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 11, 1899 |
| Granted: |
Sep. 05, 1899 |
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Patent Pictures:
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Charles L. Dunham patent Sept. 5, 1899 |
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Stan Schulz
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Description: |
| The movable jaw slides in a slot in the head; slots in the tongue of the movable jaw and main bar provide location for a connecting key. Friction between the parts holds the adjustment. The wrench is for holding drill stem sections to make and break joints.
The wrench is shown with a handle on one end, and connecting link for suspending chain, indicative of the size such tools had attained in the development of well drilling operations. |
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