×

Temperature controlled heater

  • US 4,352,976 A
  • Filed: 09/15/1980
  • Issued: 10/05/1982
  • Est. Priority Date: 09/15/1980
  • Status: Expired due to Term
First Claim
Patent Images

1. In combination, a water bed structure comprising a flat horizontal mattress supporting platform, a water filled bladder type flotation mattress with top, bottom and side walls positioned above the platform with its bottom wall opposing said platform and a retainer projecting upwardly from the platform and occurring about the mattress in supported engagement with the side walls thereof;

  • and a heater system to heat and maintain the mattress at a set operating temperature including a flat, horizontal heater with an elongate electric resistance element arranged between and in heat conducting contact with the platform and bottom wall of the mattress and spaced inward from the sides thereof;

    a control unit for the heater at the exterior of the bed structure and including a switching circuit connected with an electric power supply by an elongate service cord and controlled by a remote temperature sensing device in heat transfer relationship with the mattress to start and stop the flow of current through the heater when the temperature of the mattress is below and when that temperature reaches the set operating temperature, an elongate flexible electrical loom having inner and outer end portions and including an outer jacket, a pair of jacketed power lines coextensive with the loom and a pair of current conductors coextensive with the outer end portion of the loom, a thermo-responsive temperature sensing device within a central portion of the loom defined by the joinder of said inner and outer end portions and connected with and between the conductors, the inner end portion of the loom is joined with the heater with the ends of said lines connected with said element, the outer end portion of the loom joins with the control unit with said lines and said conductors connected with said switching circuit, the outer end portion of the loom extends from the unit between the platform and mattress and the inner end portion of the loom extends from the heater between the platform and the mattress to a zone between the platform and the mattress which is in thermally isolated spaced relationship from the heater and where said central portion of the loom in which the device is arranged is in heat conducting engagement with the mattress.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×