Cutting by use of rotating axially moving tool – Tool or tool with support – With work-engaging structure detachable from cutting edge
Patent
1983-05-19
1985-04-23
Briggs, William R.
Cutting by use of rotating axially moving tool
Tool or tool with support
With work-engaging structure detachable from cutting edge
145116R, 408188, B23B 5160
Patent
active
045126917
ABSTRACT:
A pilot adaptor for a flat wood boring bit having a shank extending to two parallel flattened sides and with an axially aligned orifice extending therebetween, the pilot adaptor being implemented by an elongated rectangular sheet metal member folded over centrally thereof for two parallel legs for receiving the parallel flattened sides of the flat wood boring bits therebetween, in which the parallel legs have diagonally opposite edges spaced apart the diameter of the pilot hole so that they are received in the pilot hole. At least one centrally aligned aperture may extend through one of the parallel legs coaxially with at least one portion punched and lanced out to form a single thread so that a sheet metal screw may extend through the aperture and orifice in the flat wood boring bits and into the lanced out portion to retain the pilot adaptor to the flat wood boring bit.
REFERENCES:
patent: 676669 (1901-06-01), Wack
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patent: 4289432 (1981-09-01), Elkins et al.
Bell Edward L.
Briggs William R.
Schmidt Edward P.
Smith Robert E.
The Singer Company
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