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US Patent: 3,345,889
Slide and grip quick-action cam-lock clamp
Patentees:
H. Keats Baker - Fullerton, CA
Fred W. Yunt - Torrance, CA

USPTO Classifications:
269/167, 269/210, 269/236, 408/98

Tool Categories:
work holding
metalworking machines : drilling and boring : drill presses : drill press accessories

Assignees:
Northrop Corp. - Beverly Hills, CA

Manufacturer:
Welch Drill Bushing Co. - Glendale, CA

Witnesses:
Unknown

Patent Dates:
Applied: May 18, 1965
Granted: Oct. 10, 1967

Patent Pictures:
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Description:
This work holding device clamps around a drill press column and is used to hold the work piece down on the table. Early versions had a cast arm, but the design quickly changed to a heavy-gauge stamped steel construction. They are very commonly found but are usually unlabeled. Information on the manufacturer is taken from ads in "Popular Science", e.g., January 1967 page 152. I own an example with a foil label on it with the same manufacturer name. For more information on this device, search on the manufacturers name on owwm.org.

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