Electric lamp and discharge devices – Fluent material supply or flow directing means – Lightning or surge arrester
Patent
1984-09-19
1987-05-12
Levy, Stewart J.
Electric lamp and discharge devices
Fluent material supply or flow directing means
Lightning or surge arrester
361120, 313346R, H01J 1700
Patent
active
046653376
ABSTRACT:
For the reduction of the work function of the electrodes, gas discharge arresters contain an activator which contains, for example, an alkali metal or nickel. Getter materials, for example barium aluminum, serve the purpose of gettering of gases which can arise in the surge voltage arrester during manufacture or during operation. With these substances, the spreads of the minium operating voltage can be maintained small as long as the activator is only moderately heated. For high loads, the activator contains an alkali metal or nickel and, in addition, barium aluminum, whereby tungsten and/or molybdenum is present as the additional substance. An activator of this type guarantees constant values of the minumum operating voltage and a narrow spread of these values even after a high electrical and thermal load. A frequent switching of the maximally permissible current is possible without an interfering alteration of the electrical characteristics.
REFERENCES:
patent: 3266861 (1966-08-01), Bleukens et al.
patent: 4123682 (1978-10-01), Lange et al.
patent: 4287548 (1981-09-01), Hahndorff
patent: 4303846 (1981-12-01), Kimura et al.
Boy Juergen
Lange Gerhard
Watzke Franz
Levy Stewart J.
Siemens Aktiengesellschaft
Williams Hezron E.
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