Electrical transmission or interconnection systems – Plural load circuit systems – Selectively connected or controlled load circuits
Patent
1992-03-13
1994-05-24
Pellinen, A. D.
Electrical transmission or interconnection systems
Plural load circuit systems
Selectively connected or controlled load circuits
307157, 315185S, 315323, 315360, H05B 3700, H05B 3909, H05B 4136
Patent
active
053151607
ABSTRACT:
A sequentially shifting control circuit for extendible light strings which includes a main controller in one end, a backward signal-generating circuit in the other end and a plurality of bidirectional shifting control units therebetween. Each bidirectional shifting control unit has a plurality of lights connected thereto, thereby constituting and enabling an extendible light string to be sequentially flashed in a forward direction or a backward direction or in both directions simultaneously. Only three conductive lines are required: one for positive power, one for ground, and one for transmitting different control signals which are represented and distinguished by different voltage ranges, voltage levels, and waveform periods, and are mixed together according to a same signal (synchronous signal) to transmit.
REFERENCES:
patent: 4780621 (1988-10-01), Bartleucci et al.
patent: 4862012 (1989-08-01), Mardon
patent: 5027037 (1991-06-01), Wei
patent: 5192895 (1993-03-01), Chang
Elms Richard T.
Pellinen A. D.
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