US Patent: 172,377 - Improvement in Gimlets


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US Patent: 172,377

Improvement in Gimlets

Patentee:

Benjamin F. Bee (exact or similar names) - Harwich, MA

USPTO Classifications:

408/214

Tool Categories:

woodworking tools : hand drills : gimlets

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

Obed Brooks

Augustus C. Snow, II

Patent Dates:
Applied:	Nov. 08, 1873
Granted:	Jan. 18, 1876

Patent Pictures:

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Description:

The claim of this patent centers on the combination of the concave cross-section of the bit and the semi-conical threaded lead. This allows the cutting edge to extend nearly to the tip, so that material is removed from the onset of the cut. The purpose is to minimize any tendency to split the wood and ease the entry of the gimlet. Similar to Percival's patent of 1835 (9169x) and L'Hommedieu's patent of 1838 (627).

Joseph Middleton referenced this patent when applying for a patent on a bit of similar appearance (407868).