US Patent: 2,710,549
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| Micro-limit Countersink Driver
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Patentee:
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| Stuart A. Cogsdill (exact or similar names) - Detroit, Wayne County, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 31, 1952 |
| Granted: |
Jun. 14, 1955 |
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Joel Havens
"Vintage Machinery" entry for Cogsdill Twist Drill Co.
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Description: |
| Claim:
A limiting countersink drive including, in combination, a cylindrical spindle having an enlarged tool engaging head at one end and an annular slot near the drive end, a tubular body extending over said spindle in abutting relation with said head having a fine thread on its outer surface and an axially disposed slot through its wall, bearing means disposed between said body and spindle, an adjusting sleeve disposed over said spindle and body having fine serrations at its lower end, a stop collar having an internal thread mated with the thread on the body, serrations on the upper end of the stop collar engageable with the serrations on said adjusting sleeve, a set-screw in said adjusting sleeve having a dog point projecting into the slot in the body for permitting relative longitudinal movement therewith and preventing relative rotation therebetween, a thrust collar on said spindle, and a spring between said thrust collar and said adjusting sleeve for urging the sleeve downwardly for maintaining the serrations in engaged adjusted position and for retracting said spindle. |
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