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US Patent: 530,894
Try Square
Patentee:
Frank Houle - Chicago, IL

USPTO Classifications:
403/99

Tool Categories:
layout tools : squares : try squares
layout tools : bevels

Assignees:
None

Manufacturer:
Unknown

Witnesses:
S. Wilbar
S. S. Stout

Patent Dates:
Applied: Mar. 21, 1894
Granted: Dec. 11, 1894

Patent Pictures: [ 1 | 2 | 3 | 4 | 5 ]
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Description:
Blade cutout ("furcated opening") that allows the blade to be set at different angles and naturally locks at a right angle. Blade is secured in position by use of a lock nut but it is claimed that it is only needed to lock the blade at an angle other than 90 degrees.

Known example marked: "HOULE TRY SQUARE/& BEVEL/PAT'D DEC. 11, 1894" on the blade.

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