| 摘要 |
This invention relates to the use of a multiplexing technique to allow for the unambiguous enabling of remotely located receiving devices. In particular, a plurality of pushbutton switches, each capable of controlling a distinct function, has a common node whose output is transmitted through the single slip-ring usually found on the steering column of an automotive vehicle. This slip-ring is normally used to conduct an electrical voltage from the horn ring to the horn control relay independent of the position of the steering wheel. The multiplexing technique disclosed herein allows for separate and independent control of not only the horn but also other functions such as a cruise control using the existing single slip-ring as the mechanism to transmit the desired signal commands. The demultiplexed signals are derived from logic circuitry located at the distal point of the slip-ring assembly.
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