Woodworking – Shaping machine – Heel forming
Patent
1981-06-18
1982-04-06
Bray, W. D.
Woodworking
Shaping machine
Heel forming
33 27L, 409182, B27C 510
Patent
active
043231004
ABSTRACT:
The present router guide has a guide plate for attachment to the base of a router with a central opening for passing the router bit. On the bottom, the guide plate has a series of openings spaced apart along a spiral of progressively increasing radius which has the central opening as its center. A pivot pin is selectively insertable into any one of these openings. This pivot pin has a pointed end for insertion in a workpiece at the center of a circular groove which is to be cut in the workpiece by the router bit as the guide plate is rotated about the pivot pin.
REFERENCES:
patent: 3635268 (1972-01-01), Lange
patent: 4143691 (1979-03-01), Robinson
patent: 4294297 (1981-10-01), Kieffer
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