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US Patent: 1,015,235
Gearing
Patentee:
George O. Leopold (exact or similar names) - Philadelphia, PA

USPTO Classifications:
74/366, 74/545, 81/34

Tool Categories:
woodworking tools : hand drills : eggbeater drills

Assignees:
North Brothers Manufacturing Co. - Philadelphia, PA

Manufacturer:
North Brothers Manufacturing Co. - Philadelphia, PA

Witnesses:
Joseph H. Klein
William A. Barr
Patent Dates:
Applied: Oct. 10, 1911
Granted: Jan. 16, 1912

Patent Pictures:
Leopold 1,015,235
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Description:
This patent is for a speed change device which also serves as a spindle lock when changing bits.

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