Spark gap protector

Details Spark gap protector Spark gap protector

1977-01-14

1979-01-02

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Miscellaneous discharge devices

3132311, 315 36, 361120, 361124, H01J 1700, H01J 2100

Patent

active

041329155

ABSTRACT:
A spark gap protector includes a gas tube spark gap device received in a supporting base. A failsafe device for permanently shorting the spark gap protector to ground after an extended discharge includes a spring biased cage and a solder pellet. An extended surge current fuses the solder pellet resulting in movement of the shorting cage to a failsafe, shorted condition. The cage normally grasps a conducting ring spaced from a shorting contact member by a thin insulating spacer defining an auxiliary gap thereacross. In case the spark gap device vents so as to become substantially inoperative, and the cage does not operate to short the device, the auxiliary gap provided backup protection at a breakdown voltage somewhat greater than ordinarily supplied by the gas tube spark gap device.

REFERENCES:
patent: RE29391 (1977-08-01), Kawiecki
patent: 3755715 (1973-08-01), Klayum et al.
patent: 4002952 (1977-01-01), Menninga
patent: 4015228 (1977-03-01), Eda et al.

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