Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1980-01-28
1981-09-22
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
B24B 2100
Patent
active
042902401
ABSTRACT:
An abrading belt runs on rolls one of which is on a yoke. A cylinder of a fluid actuator is fastened to the yoke and opposite sides of a piston in the cylinder are sequentially pressurized to cause the yoke to angulate back and forth for shifting the belt between lateral limits. A fluidic logic oscillator circuit is controlled by lateral limit sensors to switch the cylinder pressures. A lead screw couples the piston to a nominally fixed threaded element and a splined shaft connects the piston to a reversible motor. A time interval is initiated when the belt changes directions and if it expires before the next lateral limit is reached a signal is developed which causes the motor to shift the piston to thereby change the rocking angle of the yoke in one direction so the lateral travel times of the belt will become equal.
REFERENCES:
patent: 3745717 (1973-07-01), Robinson
patent: 4187645 (1980-02-01), Lind
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