Reed switch construction

Details Reed switch construction Reed switch construction

1975-04-21

1976-06-08

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

313221, C03C 304, C03C 310

Patent

active

039619702

ABSTRACT:
A reed switch construction is disclosed in which the glass envelope has thermal expansion characteristics matching those of the reeds below the glass setting point, has relatively high electrical resistivity and low devitrification tendencies, and is, in percent by weight, composed essentially of 53-59% SiO.sub.2, 3-7% Al.sub.2 O.sub.3, 20-25% Na.sub.2 O + K.sub.2 O with the K.sub.2 O:Na.sub.2 O ratio being greater than 1:1 on a weight basis, 7-10% BaO, 2-6% ZnO and 1-5% Fe.sub.2 O.sub.3.

REFERENCES:
patent: 3698921 (1972-10-01), LaGrouw
patent: 3808154 (1974-04-01), Omori
patent: 3814612 (1974-06-01), Inoue et al.

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