US Patent: 618,506
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| Wrench
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Patentee:
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| Joseph H. Hanson (exact or similar names) - Crystal Falls, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 21, 1897 |
| Granted: |
Jan. 31, 1899 |
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Patent Pictures:
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Joseph H. Hanson patent January 31, 1899 |
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Stan Schulz
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Description: |
| The patented feature is adjustment by a rack bar held in engagement with rack teeth by a ball or balls. The ball or balls can be retracted by turning sockets in a parallel "bolt" toward the rack bar.
The adjustment means is shown applied to a combination nut & pipe "monkey wrench," to an adjustable chain wrench, and to an adjustable open end wrench. |
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