Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 78,769
Improvement in the Manufacture of Augers and Bits
Machine for Upsetting Cook's Bits
James Swan - Seymour, CT

USPTO Classifications:
72/449, 76/2

Tool Categories:
tool making : making drills and augers
woodworking tools : hand drills : drill bits : auger bits


Not known to have been produced

Charles Douglas
E. H. Knight

Patent Dates:
Granted: Jun. 09, 1868

Reissue Information:
Reissued as RE4,516 (Aug. 15, 1871)

Patent Pictures: [ 1 | 2 ]
USPTO pdf tiff
Google Patents
Report data errors or omissions
This machine is designed, specifically, to upset the gouge shape cutting lips of Cook's patent bits. A spring loaded shaft in conjunction with a cam on the drive shaft, engages and disengages the die with the bit. A pin on the bevel gear rotates the shaft and die a quarter-turn to twist the lips, then automatically disengages. Auger bits, made by the James Swan Co., were marked with this patent date.

Assigned to Richard P. Bruff in second re-issue, October 21, 1873.

Copyright © 2002-2018 - DATAMP