Fail safe circuit for heat generating device

Details Fail safe circuit for heat generating device Fail safe circuit for heat generating device

1976-02-13

1978-02-21

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

219413, H02H 504

Patent

active

040756785

ABSTRACT:
A heat generating device, such as an oven, includes a heating element connected to a power source and a fuse interposed therebetween. The fuse is effective, when the magnitude of the current flowing thereto exceeds the fuse rating, to disconnect the element from the source. A thermostat is included in the circuit to control the current flow and, thus, the temperature level. In the event of a malfunction of the thermostat, temperature responsive means are effective, when the temperature sensed thereby exceeds a given level, to increase the current flowing through the fuse beyond the fuse rating. The temperature responsive means includes a temperature sensitive switch and a resistive element which may be a second heating element. When the switch is closed by excessive temperature, the resistive element is placed in parallel with the heating element, thus lowering the effective resistance of the circuit to increase the current.

REFERENCES:
patent: 2370037 (1945-02-01), Hurst
patent: 2810865 (1957-10-01), Minder
patent: 3524105 (1970-04-01), Harner et al.
patent: 3560711 (1971-02-01), Manecke
patent: 3628093 (1971-12-01), Crowley
patent: 3899656 (1975-08-01), Smith

Affiliated with

Also associated with

Rating

Fail safe circuit for heat generating device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fail safe circuit for heat generating device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fail safe circuit for heat generating device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-130812