Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1996-07-02
1998-09-15
Howell, Daniel W.
Cutting by use of rotating axially moving tool
Processes
Bit detachable
144346, 144353, 408103, 408115R, B23B 3500, B23B 4728
Patent
active
058070338
ABSTRACT:
The present invention is an improved loose tenon joint with multiple arculate mortise surfaces and similarly configured loose tenon member for woodworking applications. A jig is provided arranged to be secured to a workpiece where the jig axially guides a drill bit for boring a series of adjoining holes forming a mortise. The first jig embodiment manipulates a slidable guide bar maintaining longitudinally spaced drill guide holes and two index holes. A hand held drill is used to bore a series of holes (fixtured by the drill guide holes) into the workpiece. A second series of holes are bored (completing the mortise) after the drill guide is translated and secured to the second index hole. A second embodiment is provided including a stationary jig body arranged to be secured to a workpiece. An elongated opening in the jig body supports a drill guide with longitudinally spaced drill guide holes. A hand held drill is used to bore a series of holes (fixtured by the drill guide holes) into the workpiece. The first drill guide is replaced by a second drill guide with preset hole spacing where a second series of holes are bored, completing the mortise. Both embodiments provide multiple guide holes for fast drilling with full drill bit contact area and preset hole spacing to produce a uniform and accurate mortise for a strong loose tenon joint system.
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Page from "Woodshop News" Sep. 1995.
3 pages from catalog.
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