US Patent: 524,952 - Bit With Replaceable Wood-Screw Lead


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US Patent: 524,952

Boring-Bit
Bit With Replaceable Wood-Screw Lead

Patentee:

Elwood C. Phillips (exact or similar names) - Chicago, IL

USPTO Classifications:

408/232

Tool Categories:

woodworking tools : hand drills : drill bits

Assignees:

Frank F. Spencer - Montclair, NJ

Manufacturer:

Not known to have been produced

Witnesses:

L. M. Hopkins

N. C. Gridley

Patent Dates:
Applied:	Jan. 30, 1892
Granted:	Aug. 21, 1894

Patent Pictures:

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Description:

Not intended to supercede his previous patent (458640), this is another version of a bit using an ordinary wood screw as the lead. In this instance, the wood-screw needs to be modified by filing away part of the head to produce a flat face to keep the screw from spinning relative to the bit.