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US Patent: 379,423
Depth-Gage
Patentee:
William D. Spencer - Middletown, CT

USPTO Classifications:
33/544

Tool Categories:
layout tools : measurement gauges : depth gauges

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Henry S. Leonard
Eliahu W.N. Starr
Robert Everett
J. A. Rutherford

Patent Dates:
Applied: Dec. 27, 1887
Granted: Mar. 13, 1888

Patent Pictures:
USPTO pdf tiff
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Description:
This depth gauge uses a micrometer adjuster, and is constructed such that the scale is clearly visible when the tool is in use.

Known examples are marked only with the patent date.

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