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US Patent: 840,418
Carpenters' Plane
Plane Frog
Patentee:
William F. Arnold - Oakland, CA

USPTO Classifications:
30/489, 30/492

Tool Categories:
woodworking tools : planes : plane frogs

Assignees:
None

Manufacturer:
Unknown

Witnesses:
F. A. Holmes
J. Compton
Charles H. Taylor
N. A. Acker

Patent Dates:
Applied: Sep. 12, 1906
Granted: Jan. 01, 1907

Patent Pictures: [ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 ]
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Plane Talk article regarding Arnold Plane
Description:
A basic failing of "transitional" planes is that the wearing away of the sole, which was inevitible when working something as soft as wood, would open the throat of the plane. A number of inventors, including, most notably, John Pontius Gage of the Gage Tool Company of Vineland, New Jersey, applied themselves to the development of retractable frog assembly mechanisms, which could be retracted to compensate for even the most minor wear of the sole. Gage was not the first to tackle this problem, although he was most likely the most successful. The last to try was probably William Arnold of Oakland, California. Less than a dozen examples of this rare plane are known to exist. (Courtesy and (C) Martin J. Donnely www.mjdtools.com)

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