Sensing and indicator system for detecting heating element failu

Details Sensing and indicator system for detecting heating element failu Sensing and indicator system for detecting heating element failu

1982-01-15

1985-01-29

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

55 33, 55274, 55DIG34, 219506, 340642, 340652, 340655, G08B 2100

Patent

active

044969406

ABSTRACT:
A sensing and indicator system for monitoring multiple electric heating elements connected in three-phase balanced Y circuits in heat reactivatable adsorbent gas fractionators. The system senses a failure induced imbalance, pinpoints the location of the group with the failure and causes a failure indicating alarm to function. The system operates by a sensing circuit including a discharge bulb sensing the failure induced imbalance and causing a conduction of current through the system resulting in the activation of an alarm and the illumination of the gas discharge bulb indicating which of multiple sets of heating elements has failed.

REFERENCES:
patent: 2759177 (1956-08-01), Hightower
patent: 3513631 (1970-05-01), Seibert et al.
patent: 3716718 (1973-02-01), Nowell
patent: 4053876 (1977-10-01), Taylor
patent: 4198628 (1980-04-01), Laber
patent: 4322223 (1982-03-01), Christel
patent: 4364007 (1982-12-01), Cutler et al.
patent: 4421976 (1983-12-01), Jurek

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