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US Patent: 1,236,848
Clutch mechanism
Alternate driving means for the North Bros. 1445 drill
Patentee:
George O. Leopold - Philadelphia, PA

USPTO Classifications:
192/71

Tool Categories:
woodworking tools : hand drills

Assignees:
North Brothers Manufacturing Co. - Philadelphia, PA

Manufacturer:
Not known to have been produced

Witnesses:
William E. Shupe
William A. Barr
Walter Chism
Wills A. Burrowes

Patent Dates:
Applied: Mar. 21, 1912
Granted: Aug. 14, 1917

Patent Pictures:
Partial patent drawings
USPTO pdf tiff
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Description:
Rather delicate-looking shift mechanism for the North Bros. line of non-ratchet two-speed hand drills. This is _not_ the five-speed mechanism for the large breast drills, which added a ratchet to their speed selectors. Instead, it is an alternative mechanism used with the 1445 drills. US Patent No. 1,015,235 was the second alternative, the one actually applied to the two speed, non-ratchet 1445 drills.

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