US Patent: 1,107,769
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| Adjustable Socket Wrench Bit
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Patentees:
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| Virgil D. Earl (exact or similar names) - Portland, OR |
| Frank E. Mangold (exact or similar names) - Portland, OR |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 19, 1913 |
| Granted: |
Aug. 18, 1914 |
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Patent Pictures:
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Virgil D. Earl and Frank E. Mangold patent August 18, 1914 |
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Stan Schulz
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Description: |
| Nested sleeves within a bit-brace socket. The studs that serve to extend or retract the sleeves also serve as retainers so none of the parts get lost. |
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