Electronic depth control system

Details Electronic depth control system Electronic depth control system

1975-03-10

1977-12-27

Grieb, William H.

Earth working

Automatic power control

Land leveller type

172 7, 172 9, A01B 63114

Patent

active

040649458

ABSTRACT:
An electronic control system for controlling the depth of a vehicle drawn implement as a function of a plurality of sensed variables including a plurality of transducers one for sensing the value of each of the variables, and an electronic control circuit for initially generating a pulsating signal having a characteristic which varies in accordance with and is representative of the value of each variable, for converting that variable to a variable amplitude signal, for algebraically adding the various signals and for producing a control signal to operate an electrically operated valve in response to the polarity and amplitude of the signal to selectively raise and lower the implement to the desired depth.

REFERENCES:
patent: 3026638 (1962-03-01), Hayner et al.
patent: 3058242 (1962-10-01), Ocnaschek
patent: 3437920 (1969-04-01), Anderson
patent: 3454101 (1969-07-01), Breitbarth et al.
patent: 3516498 (1970-06-01), Schowalter
patent: 3860074 (1975-01-01), Maistrelli
patent: 3896899 (1975-07-01), Scholl

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