System and method for grinding the saw teeth of a circular saw b

Details System and method for grinding the saw teeth of a circular saw b System and method for grinding the saw teeth of a circular saw b

1986-12-31

1988-06-14

Parker, Roscoe V.

Metal tools and implements, making

Saw-making or furbishing device or machine

Sharpening and gumming

B23D 6314

Patent

active

047503874

ABSTRACT:
An automatic dual side grinder is disclosed. A circular saw blade is supported and rotated in angular increments for grinding of each saw tooth. A pair of radially-opposed, parallel grinding wheels are reciprocated, by a crank assembly radially of the blade to grind opposite sides of each tooth. The crank assembly is driven continuously by a DC electric motor. An electric control circuit for the motor has two subcircuits, each including a resistor which determines motor speed. Control is switched between the subcircuits synchronously with reciprocation by a switch actuated by a rotating cam on the crank assembly. The resistors are preferably variable rheostats. Different rheostat settings are used to grind a saw tooth at one speed and retract the grinder at a second, higher speed.

REFERENCES:
patent: 4018109 (1977-04-01), Stier
patent: 4098149 (1978-07-01), Wright
patent: 4366728 (1983-01-01), Beck et al.
patent: 4577533 (1986-03-01), Lenard et al.

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