US Patent: 556,443
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| Wrench
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Patentee:
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| Harvey Sprague (exact or similar names) - Buffalo, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 15, 1895 |
| Granted: |
Mar. 17, 1896 |
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Patent Pictures:
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Harvey Sprague patent March 17, 1896 |
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Stan Schulz
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Description: |
| The adjustment of the movable jaw is accomplished by disengaging a tooth at the pivot point of the movable jaw and spring from the rack teeth on the main shank, and sliding the jaw to the appropriate size. The set screw on the back side of the movable jaw is to limit the jaw "swing" to avoid crushing small sizes of pipe, or to force the jaws into parallel alignment for use as a nut wrench. |
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