US Patent: 2,290,197
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| Wrench
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Patent Dates:
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| Applied: |
Mar. 23, 1940 |
| Granted: |
Jul. 21, 1942 |
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Patent Pictures:
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Henry D. Merriman and Clifford D. Burbank patent July 21, 1942 |
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Description: |
| This ratchet wrench has an internal chain that engages a sprocket wheel on the ratchet head. The chain extends out the end of the handle. Pulling the chain rotates the ratchet head. A return spring retracts the chain at the end of each pull; the chain sprocket has a ratchet interface with the ratchet head. The whole mechanism is enclosed in a handle formed of two stampings. The wrench also works as a ratchet by moving the handle. Patent no. 2,292,391 (Aug. 11, 1942), is a further refinement of this patent. These patents appear to match a ratchet wrench marketed as the SPEEDEE-RATCH // PAT APPLIED FOR by the Beall Tool Division of Hubbard & Co, East Alton, Illinois.
This patent is noted in Merriman's spark plug socket patent (no. 2,294,193. |
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