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US Patent: 9,867
Mounting Spirit Levels
Pocket Level
Patentee:
Sylvester J. Sherman - New York, NY

USPTO Classifications:
105/29.1, 33/376

Tool Categories:
layout tools : levels

Assignees:
None

Manufacturer:
Unknown

Witnesses:
S. H. Maynard
F. L. Sweet

Patent Dates:
Granted: Jul. 19, 1853

Reissue Information:
Reissued as RE374 (Jul. 01, 1856)

Patent Pictures: [ 1 | 2 ]
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Description:
First patent listed for a "pocket level" typically used for attaching to framing and try squares. A spring catch is used to hold the level in place along with "bearers" which establish the horizontal plane for the level. Known examples are marked under the vial: S. J. SHERMAN, NEW YORK / PATENTED JULY 19th, 1853 and uses a set screw instead of a spring catch arrangement for securing the level. The use of of a set screw is inferred with the reissue of this patent, RE374.

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