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AssigneesHans Sauer, Matsushita Electric Works, Ltd.
InventorsHans Sauer, Takashi Takada, Yukihiro Kondo
Estimating the term…
A getter for use in a sealed contact chamber consists of a porous getter material which acts to adsorb substances which could create resistive films on electrical contacts. By disposing such a getter within the contact chamber of a switching device, such as an electromagnetic relay, molecules of, for instance, organic compounds, may be selectively and over long terms adsorbed to the getter and thus kept away from the contacts. The selective adsorption of such molecules is achieved by a porous getter material in which the majority of the pores have diameters greater than 3 nm and smaller than 100 nm, with the mean value of pore diameter ranging from about 7 nm to about 20 nm. The getter material may be substantially Al.sub.2 O.sub.3.
A getter for use in a sealed contact chamber, consisting of a porous getter material adapted to adsorb substances capable of creating resistive films on electrical contacts, the majority of the pores in said getter material having diameters greater than 3 nm and smaller than 100 nm, the pore diameter mean value ranging from about 7 nm to about 20 nm.
An electric switching system comprising a housing sealed against the environment, electrical contacts and a getter disposed in said housing, the getter consisting of a porous material adapted to adsorb substances capable of creating resistive films on the electrical contacts, the majority of the pores in said getter material having diameters greater than 3 nm and smaller than 100 nm, the pore diameter mean value ranging from about 7 nm to about 20 nm.
Dependencies are inferred from the claim text.