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US Patent: 48,454
Improvement in Rulers
Patentee:
S. L. Simpson - New York, NY

USPTO Classifications:
33/431

Tool Categories:
rules
layout tools : protractors

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Wm. Greurn
C. L. Topliff
M. M. Livingston

Patent Dates:
Granted: Jun. 27, 1865

Patent Pictures:
USPTO pdf tiff
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Description:
This is an improvement on Henry Taylor's earlier patent ( #48,454 - December 20, 1864). which adds a spring-loaded sliding stop to the compass arm.

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