Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 195,877
Improvement in Countersinks
Patentee:
Daniel F. Barber - Newton, MA

USPTO Classifications:
408/190

Tool Categories:
woodworking tools : hand drills : drill bits : countersinks
woodworking tools : hand drills : drill accessories

Assignees:
None

Manufacturer:
Daniel F. Barber - Newton, MA

Witnesses:
J. E. Maynadier
George O. G. Coale

Patent Dates:
Applied: Apr. 12, 1877
Granted: Oct. 09, 1877

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
Google Patents
Report data errors or omissions
Description:
Barber indicates his awareness of Pettes' patent 110494, but asserts his device is materially different due to the configuration of the orifice in which the drill bit is trapped. Specifically, the claim is that the angled sides accurately center bits of various sizes, relative to the location of the knife.

Copyright © 2002-2017 - DATAMP