US Patent: 906,614
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| Wrench
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Patentee:
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| Halvor Christopherson (exact or similar names) - Kidder, SD |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jul. 03, 1908 |
| Granted: |
Dec. 15, 1908 |
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Patent Pictures:
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Halvor Christopherson patent December 15, 1908 |
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Stan Schulz
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Description: |
| The adjustment mechanism is an arched toothed rack engaging teeth within a slot in the jaw. A cam lever holds the adjustment.
Compare this approach to the H.A. Paquette patent no. 947,346. |
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