US Patent: 341,378 - Spirit Level for Boring Bits


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US Patent: 341,378

Spirit Level for Boring Bits

Patentee:

William E. Gwyer (exact or similar names) - New York, NY

USPTO Classifications:

33/334, 33/369, 408/116, 408/16

Tool Categories:

layout tools : levels

woodworking tools : hand drills : drill accessories

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

James T. Graham

Edward Tate

Patent Dates:
Applied:	Sep. 22, 1885
Granted:	May 04, 1886

Patent Pictures:

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Description:

Level attaches directly to the bit and also has a balancing weight opposite the level. Designed for horizontal boring only as the level hangs on the bit.