Back to results
US 6,310,332 B1Granted
Heating blankets and the like
AssigneeWinterwarm B.V.
InventorGrahame Gerrard
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeWinterwarm B.V.
InventorGrahame Gerrard
Estimating the term…
An elongated heating element for an electric blanket comprising a first conductor means to provide heat for the blanket and extending lengthwise of the element, a second conductor means extending lengthwise of the element, and a meltdown layer between the first and second conductor means which is selected, designed and constructed or otherwise formed so as to display an NTC, and including electronic controller set to detect a change in the resistance of the meltdown layer to provide a means of changing the power supply to the first conductor means (providing heat to the blanket), to prevent destruction of the melt down layer(.), the element further including a meltdown detection circuit for detecting meltdown of the meltdown layer and for terminating power to the first conductor means in the event that the control means fails and the meltdown layer heats up to a pre-determined degree.
An elongated heating element for an electric blanket comprising a first conductor means to provide heat for the blanket and extending lengthwise of the element, a second conductor means extending lengthwise of the element, and a meltdown layer between the first and second conductor means having a meltdown characteristic less than about 130° C., and an NTC, and including electronic control means set to detect a change in the resistance of the meltdown layer to provide a means of changing the power supply to the conductor means providing heat to the blanket to prevent destruction of the meltdown layer.
An elongated heating element for an electric blanket comprising:
An elongated heating element for an electric blanket consisting of:
Dependencies are inferred from the claim text.