Patents by Inventor James D. VanWert

James D. VanWert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4304989
    Abstract: A solid state, digital control system is disclosed for individually timing and sequentially operating a number of electrically controllable devices such as remote control valves and pumps for irrigation systems. In one embodiment, the digital control system comprises clock circuits (10) which produce at least two pulses, a first or daily pulse produced at the beginning of a day and a second or alarm pulse produced at a preselected time. The daily pulse is counted by a first counter (20) and the alarm pulse is counted by a second counter (22). A plurality of outputs (24) are individually actuated on successive days by first counter (20) and are selectively applied by controllable switches (131-144) to an inhibit input (32) of second counter (22) whenever the sequential operation of the devices is not desired on a particular day. A plurality of output control circuits (38) are individually connected to the outputs (26) of second counter (22) and controlled by the court therein.
    Type: Grant
    Filed: September 5, 1979
    Date of Patent: December 8, 1981
    Inventors: H. Johannes Vos, James D. VanWert