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US Patent: 66,946
Improvement in Trial Squares
Patentees:
John Burt - Sturgis, MI
A. M. Miller - Sturgis, MI

USPTO Classifications:
33/480, 33/561.1

Tool Categories:
layout tools : squares : try squares

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
John B. Jacobs
Macey Tobey

Patent Dates:
Granted: Jul. 23, 1867

Patent Pictures:
USPTO pdf tiff
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Description:
A try square specifically designed to check the square of a low surface. This patent utilizes a double blade system with a traditional blade, and smaller, multiple pieces that are slotted and square to the main blade which highlight an out of square piece.

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