US Patent: 2,237,875
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| Chuck Jaw
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Patentee:
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| Frederick R. Brown (exact or similar names) - Brooklyn, Kings County, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 08, 1938 |
| Granted: |
Apr. 08, 1941 |
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Joel Havens
"Vintage Machinery" entry for American Machine & Foundry Co. (AMF)
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Description: |
| Claim:
Primarily, the improved appliance constituting the subject of the present application may be regarded as an improvement upon the tap holder chuck disclosed in the application for Letters Patent, dated 29 July, 1936, of Carl W. Johnson, now Patent No. 2,159,162. issued 23 May, 1939, and the present invention is of special utility when embodied in a tool of that character, although it is capable of general employment where provision is required for effecting a positive and secure grip upon an attached part. |
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