Proximity switch with ceramic front surface and method for its m

Details Proximity switch with ceramic front surface and method for its m Proximity switch with ceramic front surface and method for its m

1995-07-26

1998-06-16

Kincaid, Kristine L.

Electricity: conductors and insulators

Boxes and housings

Hermetic sealed envelope type

29447, 174DIG8, H01J 500

Patent

active

057674442

ABSTRACT:
A ceramic portion is inserted in the front side of the housing envelope by shrinking. At the the junction of these parts, a sealing layer, preferably a galvanized copper layer, is applied plied which ensures a connection which under the resulting pressure is impermeable to gases and humidity. The ceramic portion is exposed to a strong radial pressure prestress with the result that the tensile stress of the ceramic portion is reduced and thus the pressure resistance thereof is increased under the effect of an axially acting external pressure.

REFERENCES:
patent: 4604678 (1986-08-01), Hagner
patent: 4697325 (1987-10-01), Kamigaito et al.
patent: 4755637 (1988-07-01), Turck
patent: 4795134 (1989-01-01), Lanfri
patent: 4996408 (1991-02-01), Turck et al.
patent: 5256901 (1993-10-01), Ohashi et al.

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