Line protector for a communications circuit

Details Line protector for a communications circuit Line protector for a communications circuit

1988-12-08

1990-03-06

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361120, 337 32, 337 34, H02H 904

Patent

active

049071203

ABSTRACT:
A line protector for a communications circuit. The protector has a three electrode gas tube, the end electrodes of which are connected to the protector's line input terminals. The middle electrode of the tube is connected to the protector's ground terminal. Decoupling devices such as positive temperature coefficient resistors are connected in series between the line input terminals and the protector's equipment terminals. The protector also includes an additional overvoltage arrestor in the form of two diodes connected between the protector's ground terminal and the equipment terminals. The diodes have a lower voltage rating than the gas tube. A conductive clip which is in firm engagement with the protector's ground terminal is used to removably hold the diodes.

REFERENCES:
patent: 3975664 (1976-08-01), Baumbach
patent: 4262317 (1981-04-01), Baumbach
patent: 4327393 (1982-04-01), Hines et al.
patent: 4729055 (1988-03-01), Dorival et al.

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