Method and apparatus for contolling temperature in a fiber glass

Details Method and apparatus for contolling temperature in a fiber glass Method and apparatus for contolling temperature in a fiber glass

1988-01-28

1988-12-27

Envall, Jr., Roy N.

Industrial electric heating furnaces

Glass furnace device

Filament discharge

C03B 526, C03B 722

Patent

active

047946253

ABSTRACT:
A control system for a fiber glass forming bushing is described in which two thermocouple circuits are connected to a transformer having two sets of windings on a common core in series aiding configuration. A third thermocouple circuit is connected to the transformer. This configuration measures bushing temperatures, weight averages the signals representing those temperatures, and feeds a signal to a temperature controller for the bushing. The interposed transformer prevents the improper operation of the controller and possible damage to the bushing.

REFERENCES:
patent: 4024336 (1977-05-01), Jensen
patent: 4262158 (1981-04-01), Lynch
patent: 4657572 (1987-04-01), Desai et al.

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