Woodworking – Shaping machine – Pattern
Patent
1998-03-03
2000-06-20
Bray, W Donald
Woodworking
Shaping machine
Pattern
14414451, 144372, B27C 500
Patent
active
060765755
ABSTRACT:
A jig used to support and guide a router has a support base to which the workpiece is clamped as well as a moveable template containing guiding surfaces for a router. The template is attached to the support base via an elongated support channel. The support channel is permanently attached to the support base and captures two square nuts used to clamp the template to said channel while cutting but allowing the template to be loosened and repositioned between cuts. A bar clamped to the underside of the template is pressed against the channel to align both in parallel and, by virtue of being attached to the template via angled slots, can be used to adjust the position of guiding surfaces in the template relative to the workpiece. The template has a variety of slots and cutouts whose sides guide the router in the making of specific cuts for dovetail, box and related joints. The template is indexed from one cutting position to another by means of a ratchet or equivalent which engages the teeth of a saw tooth rack. The pitch or distance between teeth is precise and carefully chosen in regard to a variety of factors. The jig essentially cuts tails or pins one at a time. Its adjustable nature allows wide variation in joint design including the size and spacing of joint elements.
REFERENCES:
patent: 3800840 (1974-04-01), McCord, Jr.
patent: 4168730 (1979-09-01), Keller
patent: 4407344 (1983-10-01), Dicke
patent: 4428408 (1984-01-01), Grisley
patent: 4793604 (1988-12-01), Taylor
patent: 4995435 (1991-02-01), Godfrey
patent: 5114265 (1992-05-01), Grisley
patent: 5199477 (1993-04-01), Keller
patent: 5215296 (1993-06-01), Adams
patent: 5318082 (1994-06-01), Von Hollen
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