US Patent: 870,014
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| Tool
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Patentee:
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| Solomon A. Campbell (exact or similar names) - Boston, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 11, 1907 |
| Granted: |
Nov. 05, 1907 |
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Patent Pictures:
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Solomon A. Campbell Pat. Nov. 5, 1907 |
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Stan Schulz
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Description: |
| A spring-loaded ball acts as a combination one-way clutch and retainer for barrel-shaped interchangeable heads which may be wrench sockets. A plunger on the side of the handle releases the gripping action of the ball or moves it out of the way to allow the barrel-shaped head to be removed and replaced. |
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