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US Patent: 419,703
Spirit Level for Bit Braces
Patentee:
Joseph McLaughlin - Erving, MA

USPTO Classifications:
33/334

Tool Categories:
woodworking tools : braces : brace handles
layout tools : levels

Assignees:
None

Manufacturer:
Millers Falls Co. - Greenfield, MA

Witnesses:
Chester C. Conant
Thos. O'Kreffe

Patent Dates:
Applied: Nov. 13, 1889
Granted: Jan. 21, 1890

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Millers Falls Co.
Description:
Spirit level in the head of a brace bit with two bubble for both level and plumb.

Millers Falls appears to have purchased this patent and utilized it on their breast drill line without the mounting of the level in the handle. They instead utilized a single spirit vial mounted on the frame with some of their breast drill models.

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