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US Patent: 902,387
Detachable-blade screw-driver
Patentee:
Thomas J. Fegley (exact or similar names) - Philadelphia, PA

USPTO Classifications:
279/24, 279/97

Tool Categories:
screwdrivers

Assignees:
North Brothers Manufacturing Co. - Philadelphia, PA

Manufacturer:
North Brothers Manufacturing Co. - Philadelphia, PA

Witnesses:
William A. Barr
David Lutz

Patent Dates:
Applied: Aug. 03, 1907
Granted: Oct. 27, 1908

Patent Pictures: [ 1 | 2 | 3 ]
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"Vintage Machinery" entry for North Bros. Manufacturing Co.
Description:
An improvement on Selden North's Patent 842107.By adding a spring in the blade track of the handle , the replaceable blade is held securely in place,Norths approach to the problem was to slightly bend the prongs of the replaceable blade, thus keeping it in place by friction.Sample marked ,'North Brothers MFG.Co. PHILA. PA. U.S.A. PAT.NOV.2,97-JAN.27,01 PAT.JAN.22,1907.

See Patents 858131 and 842107 for further information on this tool.

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