Patents by Inventor Noel D. Coward

Noel D. Coward 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: 4256133
    Abstract: A watering valve device includes a first electromagnetic coil for opening a valve to enable a sprinkling system and a second electromagnetic coil for closing the valve. An electronic circuit is provided for supplying current pulses for selectively energizing the two coils to control sprinkling in response to ground moisture and/or sunlight. The circuit includes a first timer for maintaining the sprinkling valve on for a predetermined timer period after sunlight occurs to assure penetration of the ground by moisture during night-time watering. The circuit includes a second timer for maintaining the valve on for a second predetermined time period following moisture detection by a ground probe to assure ground penetration by moisture during a moisture responsive, closed loop mode of control. The circuit and valve are operated by batteries that are charged by sunlight.
    Type: Grant
    Filed: August 22, 1978
    Date of Patent: March 17, 1981
    Inventors: Noel D. Coward, Donald G. Collins, Kenneth H. Gambling