Patented and Distinctive Bit Braces & Augers, a Research Study
by
George Langford, Sc.D.
Updated December 9, 2016
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Quimby S. Backus
Randy Roeder has published both a biography of Quimby Backus and a thoroughly linked analysis of his various brace designs, including his legal troubles with patent infringement suits. The patent infringed by Backus with his 1872 patent was that of Charles Stockbridge, US Patent No. RE006350, reissued in 1875, for a brace chuck that was never made, and in fact controlled by the Millers Falls Company with no apparent intent to produce.

Patentee/
Associate
Representative Images
(right-click & view image)
Examples
Found by GB

Patents
 (same order
as examples)
Patent Dates
(chronological order)
Directory of American
Toolmakers: active years
Draper,
Backus
Chuck apart
53 48,763 July 11, 1865
Backus: 1868-1880
Wm. Draper isn't in the DAT.
Lynam,
Backus
Chuck apart
76 113,680
234,517
April 11, 1871
November 16,1880
John Lynam is not mentioned
in the DAT, so it very well may
be that this Backus chuck was added
to replace the original Lynam chuck.
Backus
Chuck apartChuck apart
79, 97 132,791
November 5, 1872
(invalidated in a patent
infringement suit, 1879)
This Backus chuck must have been
quite robust, as it is seen quite often.
Backus
Ratchet and ChuckWrist handle
177 132,791
234,517
250,047
November 5, 1872
November 16,1880
November 29, 1881
On the other hand, the springs of
this chuck are often found rusted out.
Backus
Wrench chuckWrist handle
84 132,791
216,776
250,047
November 5, 1872
June 24, 1879
November 29, 1881
Another rugged chuck.
Backus
Ratchet, Chuck
72
BackusBackus078.JPG
234,517
250,047
November 16,1880
November 29, 1881
The ratchet selector mechanism sometimes puzzled users and is found chipped or broken.