Carpenter's Combination Tool, Patent Model

Description
This combination bevel and try-square tool served as a model for patent application number 70,547 submitted by John Graham of Ludlow, Vermont November 5th, 1867. The tool combines several carpentry tools including a bevel, marker, gauge, try-square, and level (what Graham describes as an “indicator”). When the square was placed upon a surface, the indicator would point vertically to 12 o’clock if the surface was level, varying to the left or right if not. The indicator was Graham’s main claim to invention in his patent, but he additionally claimed “the combination of one or more supplemental movable or adjustable squares, with a try-square.” This claim in the patent essentially made Graham’s invention an early multi-tool, a carpenter’s Swiss-army knife of bevels, levels, and squares.
Location
Currently not on view
date made
1867
maker
Graham, John
Physical Description
steel (overall material)
brass (overall material)
Measurements
overall: 19.2 cm; 7 9/16 in
ID Number
MC.210834.01
accession number
210834
patent number
70,547
catalog number
210834.01
See more items in
Work and Industry: Hand Tools
Industry & Manufacturing
Work
Data Source
National Museum of American History, Kenneth E. Behring Center

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