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US Patent: 171,927
Improvement in Beam Squares
Patentees:
Charles Farnham - Penobscot, ME
Joseph D. Leach - Penobscot, ME

USPTO Classifications:
33/42, 33/427

Tool Categories:
layout tools : squares

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Samuel Farnham
Charles Clement

Patent Dates:
Applied: Oct. 15, 1875
Granted: Jan. 11, 1876

Patent Pictures:
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Description:
Beam square that allows mortice and tounges to be accurately marked. One blade is fixed and the second blade is adjustable with a scale on the face. Openings on the blades with graduated markings allow parallel marks to be make to complete the layout.

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