Multiplexed signal-sequence control system

Electrical transmission or interconnection systems – With harmonic filter or neutralizer

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Details

340 52E, 340278, 180 82C, B60R 2110

Patent

active

039354709

ABSTRACT:
Circuitry operative to monitor input signals indicative of seat occupancy and seat belt usage from each of four different stations with a single, multiplexed detection circuit coupled through gating circuits to four antennae, each of which is associated with a particular station. A seat belt monitor circuit receives signals indicating seat belt usage produced by a seat belt switch associated with a particular station. Another monitor circuit receives the output of the detection circuit indicating seat occupancy and the output of the seat belt monitoring circuit indicating seat belt usage and processes this information to provide a warning control signal in response to either (1) one or more signals indicating only seat occupancy or only seat belt usage, or (2) unrelated signals indicating seat occupancy and seat belt usage, or (3) related signals indicating seat occupancy and seat belt usage but occuring in an improper sequence. The system is energized only upon receiving a signal indicating seat belt usage, or activation of the ignition switch in an attempt to start the vehicle or use auxiliary vehicle power. In order to determine whether or not a seat has been occupied before the system has been fully energized, a delay signal is provided which delays complete processing of the seat belt information until the seat occupancy information has first been processed.

REFERENCES:
patent: 3742448 (1973-06-01), Motz

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