Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1981-07-23
1984-01-10
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200159B, 200292, H01H 1370
Patent
active
044254849
ABSTRACT:
An encoded keyboard switch comprises a plurality of key positions. Each key position has first and second membrane switches associated therewith. The first switch is immediately beneath the key top and the second switch is beneath the first switch. The first membrane switch has first switch contacts which are commonly connected to a first common external conductor. The second switch contacts of the first membrane switch have output conductors extending therefrom to external signal conductors. The second switch contacts are selectively connected to each other by encoding conductors. Each second associated membrane switch has third switch contacts which are commonly connected to a second common external conductor, and fourth switch contacts which are commonly connected to an internal conductor that is commonly connected to the first contacts of the first associated membrane switches of the key positions. Upon depression of a top key, the first associated membrane switch closes initially and then the second associated membrane switch is closed, thereby ensuring that the proper output signals will be sent out through the external signal conductors.
REFERENCES:
patent: 3551616 (1970-12-01), Juliusburger et al.
patent: 3566049 (1971-02-01), Wright
patent: 3617666 (1971-11-01), Brave
patent: 3627935 (1971-12-01), Splevak
patent: 3663779 (1972-05-01), Gerlach et al.
patent: 3676615 (1972-07-01), Wiedmer
patent: 3723673 (1973-03-01), Clary et al.
patent: 3917917 (1975-11-01), Murata
patent: 3969595 (1976-07-01), Johnson
patent: 3982081 (1976-09-01), Delmer, Jr.
patent: 4066851 (1978-01-01), White et al.
patent: 4246452 (1981-01-01), Chandler
patent: 4356358 (1982-10-01), Fukukura
AMP Incorporated
Raring Frederick W.
Scott J. R.
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