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US Patent: 383,196
Spirit Level
Patentees:
Edwin A. Stratton - Greenfield, MA
Charles M. Stratton - Greenfield, MA

USPTO Classifications:
33/349, 33/379

Tool Categories:
layout tools : levels

Assignees:
None

Manufacturer:
Stratton Brothers - Greenfield, MA

Witnesses:
Charles F. Thompson
Francis M. Thompson

Patent Dates:
Applied: Mar. 05, 1888
Granted: May 22, 1888

Patent Pictures: [ 1 | 2 ]
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Description:
Adjustment of the level is accomplished by using an adjustable "bead" that indicates the reading and can be moved as needed allowing the vial itself to be permanently fixed.

Known examples are marked STRATTON BROTHERS CO./GREENFIELD,MASS./PATENTED/JULY 16.1872/OCT. 4.1887/MAY 22.1888

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