Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1985-12-18
1987-10-20
Goldberg, E. A.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
219509, 219528, H05B 358
Patent
active
047015985
ABSTRACT:
A heat tracing tape which can be cut to required lengths has a heating element comprising at least two lengths of woven or braided resistance wire each in the form of a flat strip. The strips are encased in extruded silicone rubber whereby they are spaced from one another. The strips are electrically connected at one end by a connector and the tape is provided with a power supply termination either at its other end, or at a T-branch connection, for connecting the tape to the power control system. The power control system is adjustable to set an estimated value of power required to maintain a predetermined process temperature. The system automatically adjusts the power supplied to the tape to the estimated value by means of a feedback control system. A process temperature sensor also regulates the power supplied to the tape in accordance with a sensed temperature.
REFERENCES:
patent: 2939099 (1960-05-01), Morey
patent: 2982932 (1961-05-01), Morey
patent: 2985860 (1961-05-01), Morey
patent: 3268846 (1966-08-01), Morey
patent: 4436986 (1984-03-01), Carlson
patent: 4645912 (1987-02-01), Ando et al.
Cooperheat, Inc.
Goldberg E. A.
Lateef M. M.
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