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US Patent: RE374
Improvement in Spirit Levels
Pocket Level
Patentee:
Sylvester J. Sherman - New York, NY

USPTO Classifications:
33/376

Tool Categories:
layout tools : levels

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Chas. G. Page
R. T. Campbell

Patent Dates:
Granted: Jul. 01, 1856

Reissue Information:
Reissue of 9,867 (Jul. 19, 1853)

Patent Pictures:
USPTO pdf tiff
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Description:
Spring catch (or known equivalent) to hold the level in place in combination with the "bearers" that establish horizontal reference line with the level. Known examples are marked under the vial: S. J. SHERMAN, NEW YORK / PATENTED JULY 19th, 1853 (the original patent)and uses a set screw instead of a spring catch arrangement for securing the level. Note that this patent shows his middle intial as "I." versus "J." - "J." is assumed corrected based on reported marks.

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