US Patent: 38,119 - Twist Drill Bit


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US Patent: 38,119

Improvement in Drill-Bits
Twist Drill Bit

Patentee:

Stephen Ambrose Morse - East Bridgewater, MA

USPTO Classifications:

408/230

Tool Categories:

hand drills : drill bits : twist drill bits

Assignees:

None

Manufacturer:

Not known to have been produced

Witnesses:

James Eaton

Silas Burgess

Patent Dates:
Granted:	Apr. 07, 1863

Patent Pictures:

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Description:

Orientation and configuration of the flutes designed to produce a straight cutting edge, with an acute included angle, so that it cuts, rather than scrapes, the metal being bored.