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US Patent: 235,532
Bit-brace
Patentee:
Gardiner L. Holt (exact or similar names) - Springfield, MA

USPTO Classifications:
279/86

Tool Categories:
woodworking tools : braces : brace chucks

Assignees:
None

Manufacturer:
Unknown

Witnesses:
B. F. Adams
William H. Chapin

Patent Dates:
Applied: May 12, 1880
Granted: Dec. 14, 1880

Patent Pictures: [ 1 | 2 | 3 ]
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Description:
An unlabeled example is reported. The innovation here is a screw that has a hole for the tang of the bit; when the wing-nut is tightened the bit remains centered in the jaws.

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