US Patent: 2,466,651
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| Chuck
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Patentee:
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| Frank G. Zagar (exact or similar names) - Euclid, OH |
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Patent Dates:
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| Applied: |
Mar. 10, 1944 |
| Granted: |
Apr. 05, 1949 |
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Jeff Joslin
Vintage Machinery entry for Zagar Tool, Inc.
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Description: |
| Patent 3,042,418 claims to improve on this invention by doing away with the need to screw the collet onto the chuck, which caused concentricity errors because of poor tolerances in the threads of mass-produced collets. |
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