Electric resistance heating devices – Heating devices – Immersion heater details
Patent
1998-03-19
1999-08-03
Walberg, Teresa
Electric resistance heating devices
Heating devices
Immersion heater details
392497, 392498, 392499, F24H 912, H05B 340, H05B 380
Patent
active
059335750
ABSTRACT:
A water heating appliance for use in a hottub or spa with said appliance consisting of an especially designed float-body with a safety shield which protrudes from the bottom of the body and also acts as a heating chamber, with an especially designed float as differs from the float-body that activates and deactivates an on/off switch but is not a part of said switch which allows the flow of electricity to a preset temperature shut-off switch that lets electricity flow to a heating element where it is changed into heat and heats the water in the heating chamber until the temperature sensor of the shut-off switch senses a preset temperature and stops the flow of electricity by opening a circuit in said switch keeping the water from getting too hot and avoids scalding of the user of the hottub or spa. When the appliance is removed from the hottub or spa the float on the bottom of the body deactivates the on/off switch so as to protect the heating element if the user has not removed the power cord from the power outlet and avoid burns incase the element is touched when out of water.
REFERENCES:
patent: 2899533 (1959-08-01), Farmer
patent: 3899421 (1975-08-01), Keilin et al.
patent: 4835366 (1989-05-01), Owen et al.
Campbell Thor S.
Walberg Teresa
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