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US Patent: 211,132
Improvement in Instruments for Scribing Stair-Curves
Patentee: John A. Caldwell (exact or similar names) - 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 (New site tip) Google Patents Report data errors or omissions to steward Ralph Brendler
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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