Geometrical instruments – Scriber – Curved line
Patent
1994-11-22
1996-05-14
Fulton, Christopher W.
Geometrical instruments
Scriber
Curved line
33 2703, 30372, 144371, 144 486, B27C 510, B27B 904
Patent
active
055156118
ABSTRACT:
A guide for attaching to a router to form arcuate cuts in a workpiece. The router guide has a circular mounting plate which replaces a lower plate of a router. The guide has an elongated arm extending from the mounting plate with a slot extending along the longitudinal center line of the guide arm. An anchoring mechanism slidably carried in the slot includes an anchor fastener such as a wood screw or nail to anchor the anchoring mechanism to the workpiece and define a pivot point for the router and guide. The anchoring mechanism further includes a locking mechanism to releasably lock the anchoring mechanism in place along the slot to define the radius of travel of the router and guide about the pivot point.
REFERENCES:
patent: 2943392 (1960-07-01), Attridge
patent: 3635268 (1972-01-01), Lange
patent: 3858630 (1975-01-01), Cherry et al.
patent: 4324514 (1982-04-01), Craven
patent: 4685496 (1987-08-01), Livick
patent: 4798506 (1989-01-01), Kulp, Jr.
patent: 5016354 (1991-05-01), Baine
patent: 5038841 (1991-08-01), Larmon
patent: 5414938 (1995-05-01), Meek
Fulton Christopher W.
Litman Richard C.
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