US Patent: 509,667 - Expansible Bit


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US Patent: 509,667

Expansible Bit

Patentee:

Joseph P. Lavigne (exact or similar names) - New Haven, CT

USPTO Classifications:

408/194, 408/195, 408/212, 408/213

Tool Categories:

woodworking tools : hand drills : drill bits : adjustable drill bits

Assignees:

None

Manufacturer:

Kilborn & Bishop Co. - New Haven, CT

Witnesses:

Fred C. Earle

Lillian D. Kelsey

Patent Dates:
Applied:	Aug. 02, 1893
Granted:	Nov. 28, 1893

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin (dm)

Description:

The primary features of this bit are the spring loaded tongue to prevent the adjustable cutter from falling out during adjustments and the graduated stem.

An example has been reported, from Western Australia, marked:

"CLARK'S IMPROVED PATTERN BIT---PAT. NOV. 28 1893--- K&B"

Still investigating any possible connection between Lavigne and William A. Clark, whose patent No. 141324 this seems to be an improvement on.