Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1991-02-20
1992-12-29
Gaffin, Jeffrey A.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
200 5R, 307125, 307139, H01H 3502
Patent
active
051754436
ABSTRACT:
In a switch apparatus having a membrane structure, when it is detected that a conductive pattern comes into contact with both of two conductive patterns, it is judged that a normal ON operation is performed, and an ON signal is output. When the conductive pattern comes into contact with only one of the two conductive patterns, it is judged that a failure such as a short-circuit due to peeling occurs, and an alarm signal is output. The switch apparatus has a self-detecting function, so that it reliably detects an unstable condition of a failure such as a short-circuit due to peeling.
REFERENCES:
patent: 3728501 (1973-04-01), Larson et al.
patent: 3879593 (1975-04-01), Larson
patent: 3987259 (1976-10-01), Larson
patent: 4017697 (1977-04-01), Larson
patent: 4320573 (1983-03-01), Larson
patent: 4536625 (1985-08-01), Bebie
patent: 4652704 (1987-03-01), Franklin
Gaffin Jeffrey A.
Sharp Kabushiki Kaisha
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