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US Patent: 45,854
Improvement in Mode of Manufacturing Screw Drivers
Patentee:
George Parr - Buffalo, NY

USPTO Classifications:
72/338, 76/119

Tool Categories:
screwdrivers : screwdriver blades

Assignees:
None

Manufacturer:
George Parr - Buffalo, NY

Witnesses:
W. H. Forbush
W. M. Prince

Patent Dates:
Granted: Jan. 10, 1865

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for George Parr
Description:
Screwdriver blanks are stamped out of rolled metal plates approximately 3 feet long and in a width which equals the blank size of the tool to be punched.

The blanks are rolled thicker in the middle and with a gradual taper to the ends.

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