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US Patent: 2,242,510
Adjustable countersink structure
Patentee:
Stuart A. Cogsdill - Detroit, MI

USPTO Classifications:
408/112

Tool Categories:
metalworking machines : drilling and boring : drill bits : metalworking countersinks
woodworking tools : hand drills : drill bits : countersinks

Assignees:
Cogsdill Twist Drill Co. - Detroit, MI

Manufacturer:
Cogsdill Twist Drill Co. - Detroit, MI

Witnesses:
Unknown

Patent Dates:
Applied: Aug. 22, 1940
Granted: May 20, 1941

Patent Pictures:
USPTO pdf tiff
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Description:
This countersink provides adjustable depth control. An example is seen marked with this patent number plus patent 2,308,055 and British patent GB-55,411.

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