Patents by Inventor Stephen W. Dougal

Stephen W. Dougal 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: 5147531
    Abstract: A salt level monitoring device for water softeners including a weight for placement upon the salt mass; a drop line connected to the weight at one end and a sensor at the opposing, upper end; and a support member for supporting the sensor and drop line over the salt mass. Once the salt mass drops to a selected level, tension is placed upon the drop line and hence the sensor causing actuation thereof to send forth either an aural or visual signal. The weight has a mass less than the mass of the salt but greater than the mass of brine to prevent the weight from becoming embedded in the salt mass and to prevent false signals. A clip attaches the drop line to the weight for convenient adjustment of the drop line depth so that the salt level may be monitored at selected heights within the softener.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: September 15, 1992
    Inventor: Stephen W. Dougal