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US Patent: 1,109,516
Hand-operated drill
Patentee:
James Dalton (exact or similar names) - Roxbury, MA

USPTO Classifications:
408/92

Tool Categories:
woodworking tools : hand drills
metalworking machines : drilling and boring : portable metal drilling machines

Assignees:
None

Manufacturer:
Duff Machine Co. - Lowell, MA

Witnesses:
W. R. Smith
John J. McCarthy
Isabella Dalton
Charles F. Dorey

Patent Dates:
Applied: Sep. 17, 1913
Granted: Sep. 01, 1914

Patent Pictures: [ 1 | 2 | 3 | 4 ]
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Description:
An ad in the August 1900 Machinery, page 40, shows "J. R. Duff's Hand Driller" which is a standard bit brace with the addition of this patent chain-and-threaded-collar feed mechanism. The manufacturer is Duff Machine Co., Lowell, Mass. A surviving example (see photos), presumably a different model than the one pictured in the ad, quite closely matches the patent drawing.

There was a Duff Machine Co., Haverhill, Mass., that made milling machines in the 1950s, but that seems to be a company unrelated to the Lowell company of the same name that was active in the early part of the 20th century.

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