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US 4,814,583 AGranted
Temperature controller for a waterbed
AssigneeSafeway (Australasia) Limited
InventorJon Rainey
Life of this patent
Estimating the term…
Abstract
A temperature controller for controlling an electrical heater of a bed maintains the bed at a predetermined set temperature and additionally, over a long period of time, acts to vary the set temperature to compensate for variations in the temperature of the ambient environment in which the bed is situated. First and second temperature sensors respectively sense the temperature of the bed and the temperature of the environment ambient to the bed and the heater is switched to regulate the heating of the bed thereby.
Claims11
A temperature controller for controlling an electrical heater of a waterbed, comprising:
- first temperature sensing means to indicate the temperature of the water mattress of the waterbed,
- second temperature sensing means to indicate the temperature of the environment ambient to said waterbed, and
- means for switching said heater to regulate the heating of said waterbed thereby, arranged to:
- actuate said heater to maintain said waterbed mattress at a predetermined set bed temperature, and
- vary said set bed temperature to compensate for variations in the temperature of said environment ambient to said waterbed to increase said set temperature in response to a decrease in the temperature of said environment and to decrease said set temperature in response to an increase in the temperature of said environment, the degree of said increase and/or decrease being so proportionate to the decrease or increase of the ambient environment temperature that the temperature of said water mattress is varied to compensate for variations in the temperature of said environment by such amounts that said mattress is maintained at an optimum temperature for occupants of the bed.
2 more elements
Dependencies are inferred from the claim text.