Sunbeam Products, Inc.

Armando Alvite

Leonard I Horey

Gabriel S Kohn

Wayne Dearman

Mitchell Brewer

W Mark Sullivan

A heating blanket reduces the possibility of electrical arcing by providing a series of individual heating elements each carrying a low current.

Heating blankets with low-current multiple heating elements

A warming blanket having a temperature sensing element for sensing the temperature of the warming blanket. The temperature sensor may be a positive temperature coefficient (PTC) element that is threaded throughout the blanket. In one embodiment, the temperature sensing element runs perpendicular or transverse to the heating wires in the warming blanket, permitting the temperature sensing element to measure an average blanket temperature. In another embodiment, the heating element is supplied as a pair of buss wires extending along opposite sides of the warming blanket and having a number of heating wires extending therebetween. In this embodiment, the temperature sensing elements may run either parallel to or transverse to the heating elements. Temperature changes/signals in the temperature sensing element are sent to a microprocessor, which in turn changes the wattage of the heating elements to prevent overheating of the warming blanket.

Temperature sensor for a warming blanket

One or more current sensors are mounted externally of a heating member so as to simplify construction of the heating member. The sensors are particularly useful in safety control circuits for heating members using PTC wire as resistance heating elements.

Warming blanket having remote safety circuit

Disclosed is a warming blanket system having a fabric comprising a heating element, a data temperature mechanism configured to provide ambient air temperature data, a user input configured to provide user heat output preference data for a given normal ambient temperature, and a control system configured to input said air temperature and user heat output preference data and adjust heat output to said heating element based upon a deviation of a measured ambient temperature from said normal ambient temperature.

Temperature compensation warming fabric

Heat losses from electric heating pads, blankets and pillows are reduced by aligning heat reflective strips or coatings over the top of a heating wire arranged inside the pads, blankets and pillows. By reducing heat losses, lower wattage can be applied to the heating wire to transfer the same amount of heat to a user as equivalent higher wattage blankets which do not have the heat reflective strips. By lowering the applied wattage, a more efficient blanket results.

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Miami, FL, United States of America

Armando Alvite