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US Patent: 658,881
Gage for Carpenters
Patentee:
George W. Thompson - Somerville, MA

USPTO Classifications:
33/44

Tool Categories:
layout tools : marking gauges : butt gauges
layout tools : marking gauges

Assignees:
None

Manufacturer:
Unknown

Witnesses:
J. S. Dearborn
A. M. Tuttle
C. B. Tuttle

Patent Dates:
Applied: Feb. 02, 1899
Granted: Oct. 02, 1900

Patent Pictures: [ 1 | 2 ]
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Description:
This is a another enhancement to the Marden Patent of 1872 (125,823), which adds a second adjustable fence referencing a second point on the back of the arm. This second point is intended to mark the hinge depth.

These pieces are almost always mis-identified as Marden's Patent by dealers, and even one Chapin-Stevens catalog had both the Marden's and Thompson's gages identified as Marden's. This mistaken identity is so pervasive that you will often find Thompson's gage desribed as "Marden's Improved Patent".

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