Woodworking – Shaping machine – Grooving machine
Patent
1980-03-10
1981-09-29
Bray, W. D.
Woodworking
Shaping machine
Grooving machine
409182, B27C 510
Patent
active
042917352
ABSTRACT:
The present router guide has a guide plate with a central opening for passing the router bit, and an eccentric periphery and a groove in the top extending parallel to that periphery. A slide is coupled to the guide plate at the groove and it presents a straight edge disposed beyond the guide plate for sliding engagement with a reference surface to guide the router bit along a path parallel to that surface. The slide can be clamped to the guide plate at any selected position along its eccentric periphery, thereby determining the spacing of the router bit from the straight edge on the slide. The coupling between the slide and the guide plate at the latter's groove keeps the straight edge on the slide perpendicular to a radius from the router bit out to the slide. The guide plate has a series of bottom recesses arranged in a spiral around its central opening and each providing a possible location for a pivot pin when the router is used to cut a circular groove in a workpiece.
REFERENCES:
patent: 2952281 (1960-09-01), Weber
patent: 3635268 (1972-01-01), Lange
patent: 4044805 (1977-08-01), Gronholz
patent: 4143691 (1979-03-01), Robinson
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