US Patent: 396,689
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Wrench
Improved Wrench and Oiler
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Patentee:
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| Alexander L. Duncan (exact or similar names) - Roscoe, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 16, 1888 |
| Granted: |
Jan. 22, 1889 |
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Patent Pictures:
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Alexander L. Duncan patent January 22, 1889 |
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Stan Schulz
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Description: |
| The wrench has two sockets. Each has an interior chuck for a smaller size. Each spring latch releases one chuck to retract to open the larger size. The wrench could be supplied with sets of several sizes of such chucks. The handle is hollow, with a spring-loaded needle valve, forming an oiler. |
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