Communications: electrical – Systems – Selsyn type
Patent
1986-01-28
1988-06-14
Crosland, Donnie L.
Communications: electrical
Systems
Selsyn type
340538, 340588, 340596, 340640, 340655, 34087017, 34087021, 219510, 219539, 219327, 219328, 137 59, 137 62, 138 33, 374165, 374183, 331 66, H04M 1104, H05B 102
Patent
active
047514957
ABSTRACT:
A system, utilizing an analog pulsed signal, is for monitoring the condition of a system, by way of illustration, a multi-circuit electrically heat-traced substrate. The system senses the temperature of the substrate at the end of a heat traced circuit, converts the temperature to a pulsed signal, and drives the pulsed signal along the heat tracing to the control and distribution panel for the heat tracing in direct opposition to the AC which powers the heat tracing. A receiver converts the pulsed signal to a digital temperature read-out. Utilization of an analog pulsed signal enables the system to be used in a multi-circuit system without interference or signal mixing from adjacent circuits.
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Burkard Herbert G.
Crosland Donnie L.
Raychem Corporation
Richardson Timothy H. P.
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