Adjustable wobble dado assembly having improved dynamic balance

Details Adjustable wobble dado assembly having improved dynamic balance Adjustable wobble dado assembly having improved dynamic balance

1976-11-22

1977-10-25

Simpson, Othell M.

Woodworking

Rotary cutter

Wobble saw

90 11A, 407 31, B23C 102

Patent

active

040552047

ABSTRACT:
An adjustable wobble dado assembly having a plate-like circular blade, a pair of inner plate members fixedly mounted on either side of the blade having generally parallel outer surfaces and complementary inner surfaces for holding the blade at an inclined position relative to the outer surfaces, and a pair of interconnected outer plate members on either side of the inner plate members having parallel outer surfaces and complementary inner surfaces inclined relative to the outer surfaces and bearing rotatably against the inner plate members. Each inner plate member has an inwardly tapering central aperture for rotatably receiving a respective cylindrical hub of an outer plate member. Each cylindrical hub extends along an axis perpendicular to the outer surface, rather than the inclined inner surface, of the outer plate member, such axis also being coincident with the axis of an arbor bore extending through the hub. The outside surfaces of the hubs, if tapered at all, are not tapered to the same degree as the central bores of the inner plate members, so that upon relative rotation of the blade and inner plate members relative to the outer plate members, the central bores tilt with respect to the hubs as though moving about a fulcrum. The inner and outer plate members are formed of a material having a greater specific gravity than the material of the circular blade so as to maximize the concentration of mass near to the arbor axis of rotation.

REFERENCES:
patent: 682810 (1901-09-01), Parks
patent: 716094 (1902-12-01), Peoples
patent: 2286633 (1942-06-01), McCabe
patent: 2458216 (1949-01-01), Spindt
patent: 2544814 (1951-03-01), Warren
patent: 2665722 (1954-01-01), Edgemond, Jr.
patent: 2922449 (1960-01-01), Sam
patent: 3172437 (1965-03-01), Hansen
patent: 3848512 (1974-11-01), Erhardt

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