Line protector for a communications circuit

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

1978-02-23

1979-09-18

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361119, 337 32, H02H 322

Patent

active

041685156

ABSTRACT:
A line protector for a communications circuit provides overvoltage and overcurrent protection. The overvoltage protection is effected through an arrester that provides an arc gap from the line to ground. For overcurrent protection a fusible element is melted by a heat coil causing a conductive cup to move into engagement with a conductive plate that is connected to a line pin, thereby forming a direct metallic shunt to ground. The heat coil assembly, the line pins, and the contact plates associated with the line pins are mounted on a dielectric sub-base which in turn is supported by the base of the protector. The ends of the heat coil are welded to the contact plates and the line pins are staked to the contact plates, thereby eliminating noise-causing butt contact connections in the line circuit.

REFERENCES:
patent: 3255330 (1966-06-01), MacKenzie et al.
patent: 3281625 (1966-10-01), Wanaselja
patent: 3573695 (1971-04-01), Geyer et al.
patent: 3587021 (1971-06-01), Baumbach
patent: 3743888 (1973-07-01), Baumbach
patent: 3818271 (1974-06-01), Baumbach
patent: 3849750 (1974-11-01), Baumbach et al.
patent: 3889221 (1975-06-01), Heisinger
patent: 3947730 (1976-03-01), DeLuca
patent: 4074337 (1978-02-01), Debortoli et al.

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