Metal tools and implements – making – Saw-making or furbishing device or machine – Sharpening and gumming
Patent
1988-02-29
1989-04-25
Parker, Roscoe V.
Metal tools and implements, making
Saw-making or furbishing device or machine
Sharpening and gumming
76 42, B23D 6314
Patent
active
048236497
ABSTRACT:
An automatic dual sidegrinder for a circular saw includes precision adjustments for the tangential grinding angle, the radial grinding angle, and provides a high speed automatic regrinding operation. The tangential angle adjustment is made by a torsion bar that presses against a rotatable index finger stop. The torsion bar is moved by a screw bearing against it mounted in a fixture attached to the frame. The radial angle adjustment is made by turning cams mounted on bolts bored into a frame which are situated in slots cut into movable plates which support rotary grinding spindles. The cams rotate the plates, changing slightly the radial angle of attack of the grinding wheels. The speed of the saw is doubled by indexing the saw on the completion of both a forward and rearward longitudinal stroke of the grinding wheels. The drive motor for the longitudinal motion of the wheels has an output cam shaft with oppositely opposed flats. A switch having an input plunger responds to the flats when the shaft rotates so as to trigger an indexing mechanism which advances the saw one increment of rotation.
REFERENCES:
patent: 3850052 (1974-11-01), Stier
patent: 3889741 (1975-06-01), Stier
patent: 4018109 (1977-04-01), Stier
patent: 4098149 (1978-07-01), Wright
patent: 4366728 (1983-01-01), Beck et al.
patent: 4750387 (1988-06-01), Swiger
IMW Brochure, IMW Inc. Model 200B, Automatic Dual Side Grinder, 2/29/88.
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