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US Patent: 562,329
Wrench attachment for brace
Henry A. Coolidge - East Jaffrey, NH

USPTO Classifications:

Tool Categories:
wrenches : brace wrenches

Henry A. Coolidge - East Jaffrey, NH
John W. Coolidge - Hancock, NH

N. W. Farley and Co. - Hancock, NH
Hudson Parer Co. - Leominster, MA

A. C. Harmon
Edward F. Allen
C. L. Rich
Lana M. Rich

Patent Dates:
Applied: Feb. 19, 1896
Granted: Jun. 16, 1896

Patent Pictures: [ 1 | 2 | 3 ]
Henry A. Coolidge patent June 14, 1896
USPTO pdf tiff
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Jaws hinged together slide in a frame which opens them as they extend. A spring retracts and closes them.

The COOLIDGE BIT BRACE WRENCH and a larger version with a ratchet "T" handle marketed as the COOLIDGE AUTOMATIC RATCHET WRENCH were produced in the early 20th Century.

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