Telephone line surge protector module with fast-acting, high resistance heat coil assembly
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United States of America Patent
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Jul 8, 1997
Grant Date -
N/A
app pub date -
Aug 28, 1995
filing date -
Aug 28, 1995
priority date (Note) -
Expired
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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.
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