Push-button switch

Details Push-button switch Push-button switch

2005-08-16

2005-08-16

Friedhofer, Michael A. (Department: 2832)

Electricity: circuit makers and breakers

Snap

Double snap

C200S516000, C200S269000

Reexamination Certificate

active

06930266

ABSTRACT:
A push-button switch includes insulating member having a surface, first and second stationary contacts electrically isolated from each other and provided at the surface of the insulating substrate, and a movable contact. The movable contact includes an elastic metal base having a dome-shape and having a concave surface spaced from the first stationary contact and an outer rim mounted on the second stationary contact, a nickel plated layer provided on the concave surface of the elastic metal base and having a thickness ranging from 0.05 μm to 0.5 μm, a copper plated layer provided on the nickel plated layer and having a thickness ranging from 0.05 μm to 0.7 μm, and a silver plated layer provided on the copper plated layer and having a thickness ranging from 0.1 μm to 2 μm. The push-button switch has a long operating life time, has a stable contact resistance, and is inexpensive.

REFERENCES:
patent: 3808384 (1974-04-01), Boulanger
patent: 4254309 (1981-03-01), Johnson
patent: 4263485 (1981-04-01), Corwin
patent: 5986228 (1999-11-01), Okamoto et al.
patent: 6271487 (2001-08-01), Domzalski et al.
patent: 6492602 (2002-12-01), Asai et al.
patent: 6639159 (2003-10-01), Anzai
patent: 2002-334628 (2002-11-01), None

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