US Patent: 1,004,562
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| Wrench
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Patentee:
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| William Henry Joseph Fitzgerald (exact or similar names) - Braintree, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jun. 12, 1911 |
| Granted: |
Oct. 03, 1911 |
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Patent Pictures:
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William H.J. Fitzgerald patent October 3, 1911 |
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Stan Schulz
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Description: |
| An improvement on the wedge-adjust wrench based on John R. Long patent nos. 890,146 and 955,974.
A motion stop on the back limits movement of the binding yoke, and a friction spring improves coordination of the yoke and movable jaw. The friction spring also appears in Fitzgerald's parallel pipe wrench patent no. 1,004,561.
Post WWII efforts to "revive" sliding wedge adjust wrenches were realized in the SUL (Germany) and SLIK (Britain). |
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