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US Patent: 211,132
Improvement in Instruments for Scribing Stair-Curves
Patentee:
John A. Caldwell - Brownsville, TN

USPTO Classifications:
33/29

Tool Categories:
layout tools : bevels

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Ferdinand A. Pleitz
John Clinton
C. Neveux
C. Sedgewick

Patent Dates:
Applied: Aug. 10, 1878
Granted: Jan. 07, 1879

Patent Pictures:
USPTO pdf tiff
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Description:
This is a specialized bevel gage designed to assist a carpenter in laying out the curves for a curved staircase.

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