US Patent: 523,136
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| Wrench
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Patentee:
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| Gregor Trakofler (exact or similar names) - Pittsburgh, PA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 10, 1894 |
| Granted: |
Jul. 17, 1894 |
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Patent Pictures:
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Gregor Trakofler patent July 17, 1894 |
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Stan Schulz
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Description: |
| The two jaws are on ends of an extended "U" shape with the bend of the "U" formed as a spring tending to open the jaws. A sliding yoke that fits into notches in the outer edges of the legs adjacent to the jaws sets the width of the jaw opening. A set screw in one of the legs can "lock" the adjustment against accidental alteration. |
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