US Patent: 228,437
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| Monkey Wrench
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Patent Dates:
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| Applied: |
Jun. 11, 1879 |
| Granted: |
Jun. 08, 1880 |
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Patent Pictures:
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1 | 2
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Stephen H. Bellows Pat. June 8, 1880 |
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Description: |
| (W. E. Simonds - patent attorney). The spring-loaded adjustment release allows for quick adjustment. The threads are wedge-shaped in cross section. These are well-made wrenches. The six-inch size with solid steel handles rather than the wood handles shown in the patent drawing are most common. Larger sizes with wood handles are known. |
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