US Patent: 73,828 - Improvement in Try Squares


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US Patent: 73,828

Improvement in Try Squares

Patentee:

H. L. Ogden (exact or similar names) - 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.