Glass manufacturing – Processes – Forming product or preform from molten glass
65162, 65DIG4, 219494, 219504, 373 28, C03B 3707
A bushing controller circuit for regulating the current flow through a fiber glass bushing to thereby control the temperature of the molten glass being drawn into fibers is disclosed. The bushing temperature is measured by a plurality of thermocouples which produce an average temperature reading that is used to control the power fed to the bushing. The bushing controller circuit is a three-terminal device connected across two sections of the bushing to regulate relative current flow in the two sections, in order to control the amount of fiber produced by each section. The bushing controller circuit includes a pair of timing circuits which operate in response to the polarity and magnitude of a control signal, produced at a remote control panel, to control the conductivity of a corresponding pair of current control devices connected across respective sections of the bushing. A reset circuit produces a signal corresponding to the zero crossing of the input AC power to synchronize the timing circuits.
patent: 3969098 (1976-07-01), Jensen
patent: 4017287 (1977-04-01), Jensen
patent: 4167403 (1979-09-01), Coggin
patent: 4272271 (1981-06-01), Thompson
patent: 4285712 (1981-08-01), Thompson
patent: 4515614 (1985-05-01), Barkhau et al.
patent: 4546485 (1985-10-01), Griffits et al.
Curley John E.
PPG Industries Inc.
Three-terminal controller for fiber glass bushing does not yet have a rating. At this time, there are no reviews or comments for this patent.If you have personal experience with Three-terminal controller for fiber glass bushing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-terminal controller for fiber glass bushing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2405012