Dome switch having contacts offering extended wear

Details Dome switch having contacts offering extended wear Dome switch having contacts offering extended wear

1981-01-22

1982-03-09

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200275, 200302, H01H 1370

Patent

active

043190995

ABSTRACT:
An improved dome switch is disclosed in which the configuration of the dome is modified to avoid premature wear of the circular contact. Specifically, the marginal portions of the dome is physical contact with the circular contact are provided with reverse curvature relative to the curvature of the remainder of the dome. The dome switch is incorporated in devices in which the switch is mechanically actuated, such as in a video game joy stick, or manually actuated, such as in the keyboard of a hand-held calculator.

REFERENCES:
patent: Re29440 (1977-10-01), Durkee et al.
patent: 3749859 (1973-07-01), Webb et al.
patent: 3806673 (1974-04-01), Boulanger
patent: 3996429 (1976-12-01), Chu et al.
patent: 4029915 (1977-06-01), Ojima
patent: 4033030 (1977-07-01), Robinson
patent: 4085306 (1978-04-01), Dunlap
patent: 4124787 (1978-11-01), Aamoth et al.
patent: 4163125 (1979-07-01), Boulanger

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