Disclosed herein are gas tube arrestor configurations employing multiple-function fail-safe elements which coact with the gas tube arrestor to define both a fusible path for fail-safe shorting and grounding of the arrestor in the event of certain forms of excessive overloads, as well as ionization gaps...http://www.google.ca/patents/US4062054?utm_source=gb-gplus-sharePatent US4062054 - Multi-function fail-safe arrangements for overvoltage gas tubes
