Fuse circuitry

Details Fuse circuitry Fuse circuitry

H - Electricity

05

B

309/5

H05B 3/06 (2006.01) F25D 21/04 (2006.01) H02H 7/00 (2006.01)

Patent

CA 1130847

S P E C I F I C A T I O N TO ALL WHOM IT MAY CONCERN: BE IT KNOWN that I, THOMAS REHBERG, a citizen of the United States of America, residing at 17931 LaHaigh, Homewood, in the County of Cook and State of Illinois, have invented a new and useful improvement in FUSE CIRCUITRY of which the following is a specification. ABSTRACT OF THE DISCLOSURE A control system for use in electrically heated glass panel refrigerator doors to substantially prevent electrical shock if the glass panel is accidentally broken. The control system has an interlock switch for effectively disconnecting the power source from both the panel heater and the door heater of the electrically heated refrigerator door should breakage occur. The interlock switch includes a thermal responsive device, such as a fuse, and a fuse heater. If the glass panel is accidentally broken causing the panel heater to become dangerously exposed, the fuse heater is activated to generate a sufficient amount of heat to blow the fuse which opens the circuit to quickly and safely deactivate both the panel heater and the door heater.

317409

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