Electricity: electrical systems and devices – Safety and protection of systems and devices – High voltage dissipation
Patent
1995-08-28
1997-07-08
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
High voltage dissipation
29618, 361119, H02H 104
Patent
active
056468121
ABSTRACT:
A telephone line surge protector module with fast-acting, high resistance heat coil assembly includes a plurality of turns of resistive heating wire having a conductive core, a heat-resisting insulative coating, and a relatively high tensile-strength serving for resisting manufacturing stresses. The serving permits a number of turns of the wire to be tightly wound about a bobbin, without being damaged due to stresses encountered in the manufacturing process. The heat resisting insulative coating prevents shorting between the turns at high temperatures, yet is thin enough so that inter-turn thermal conductance is not degraded. The serving is preferably formed of a material that softens or liquifies at high temperatures to enhance inter-turn thermal conductance. The module with fast-acting coil is suitable for protecting sensitive electronic digital switches.
REFERENCES:
patent: 3947730 (1976-03-01), De Luca et al.
patent: 4069509 (1978-01-01), De Luca
patent: 4288660 (1981-09-01), Fasano
patent: 4318153 (1982-03-01), Fasano
patent: 5106701 (1992-04-01), Kurosaka et al.
Gaffin Jeffrey A.
Porta Systems Corp.
Sherry Michael J.
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