US Patent: 2,441,414 - Drill press


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US Patent: 2,441,414

Drill press

Patentees:

Paul A. Smith (exact or similar names) - Detroit, MI

Ernest F. Hohwart (exact or similar names) - Detroit, MI

George Hohwart (exact or similar names) - Detroit, MI

USPTO Classifications:

408/129, 74/840

Tool Categories:

metalworking machines : drilling and boring : drill presses

woodworking machines : wood drilling and boring : drill presses

Assignees:

N. A. Woodworth Co. - Ferndale, MI

Manufacturer:

N. A. Woodworth Co. - Ferndale, MI

Witnesses:

Unknown

Patent Dates:
Applied:	Oct. 27, 1945
Granted:	May 11, 1948

Patent Pictures:

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Vintage Machinery entry for N. A. Woodworth Co.

Description:

The primary innovation is a method of limiting the advance of the drill bit in a self-feeding drilling machine so as to prevent the bit from being damaged when it breaks through the workpiece which normally causes a large shock or jolt.