Time-proportioning control system for earth-working machines

Details Time-proportioning control system for earth-working machines Time-proportioning control system for earth-working machines

1977-06-20

1979-06-12

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Vehicular guidance systems with single axis control

318599, 318681, 361191, 330 1A, G05D 100

Patent

active

041581628

ABSTRACT:
A time-proportioning control system is disclosed for controlling an on-off solenoid valve of an earth-working machine, the system having a sensor responsive to an external reference for producing an error signal, an amplifier switch for switching on and off the on-off solenoid valve in response to the error signal and a capacitive feedback circuit connected from the output to the input of the amplifier switch for controlling the on and off times of the solenoid valve dependent upon the magnitude of the error signal.

REFERENCES:
patent: 3437826 (1969-04-01), Kelley
patent: 3471759 (1969-10-01), Broverman
patent: 3686557 (1972-08-01), Futamura
patent: 3702149 (1972-11-01), Thompson
patent: 4028604 (1977-06-01), Togo

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