Electronic depth control system
US4064945A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1975 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Mar 10, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B63/1117
- WIPO fieldControl
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.