Woodworking – Shaping machine – Grooving machine
Patent
1989-11-03
1990-05-01
Bray, W. Donald
Woodworking
Shaping machine
Grooving machine
33 42, 33 43, 144134D, 409182, B27C 500
Patent
active
049210238
ABSTRACT:
An attachment mountable on the underside of a router by means of which slots or grooves may be accurately cut in a work-piece parallel to an edge of the piece. The attachment comprises a plate member preferably formed of transparent plastic sheet material. The plate member is generally sector-shaped and has an area several times greater than the area of the router underside. A router blade opening is located in the plate member. A fence member is pivotally attached adjacent one end to the plate member on the underside of the plate member adjacent its narrow end. The fence member has a straight edge which extends from the place of pivotal attachment to the arcuate edge of said plate member. The fence member has a cut-out in its straight edge of such size and location as to coincide with the router blade opening when the fence is aligned with the blade opening. The plate member has indicia adjacent its arcuate margin which indicate the perpendicular distance between the straight edge and the center of the router opening. Clamp means secure the fence member in selected set positions with respect to the plate member.
REFERENCES:
patent: 964785 (1910-07-01), Johnson
patent: 3292494 (1966-12-01), Anderson et al.
patent: 4483071 (1984-11-01), te Kolste
patent: 4685496 (1987-08-01), Livick
patent: 4776374 (1988-10-01), Charlebois
patent: 4843728 (1989-07-01), Francis
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