US Patent: 405,522
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| Bit-holder
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Patentee:
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| Harry S. Bartholomew (exact or similar names) - Bristol, CT |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 05, 1889 |
| Granted: |
Jun. 18, 1889 |
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Patent Pictures:
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1 | 2
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Jeff Joslin
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Description: |
| "My invention relates to improvements in holders for bits and other tools of the class in which the jaws are arranged in a transversely-slotted socket, and are forced together under the action of a screw sleeve or thimble, and are also provided with an additional mechanism for operating in connection with said parts for grasping the jaws to a further extent; and the object of my invention is simplicity of construction and general convenience and efficiency." |
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