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US Patent: 73,828
Improvement in Try Squares
Patentee:
H. L. Ogden - Atkison, IL

USPTO Classifications:
33/495

Tool Categories:
layout tools : squares : try squares

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
B. S. Leininger
John Ashley, Jr.

Patent Dates:
Granted: Jan. 28, 1868

Patent Pictures:
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Description:
Try square with a hinged blade and flat internal spring that adjusts itself to the edge of the material being measured and indicates the angle on a scale on the body. It ranges approximately 45 degrees and there appears to be no mechanism to lock the square at any position although a pin stop is provided at 90 degrees.

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