Multiplexing apparatus for plural output device control

Claim 1

MULTIPLEX APPARATUS, COMPRISING: (A) A PLURALITY OF TRANSMITTERS, EACH HAVING A POWER INPUT AND AN OUTPUT; (B) A PLURALITY OF RECEIVERS CORRESPONDING IN NUMBER TO SAID PLURALITY OF TRANSMITTERS; (C) EACH RECEIVER HAVING TWO COMPLEMENTARY POWER INPUTS AND HAVING A CHARACTERISTIC SUCH THAT POWER MUST BE SUPPLIED SIMULTANEOUSLY TO BOTH INPUTS TO ENERGIZE THE RECEIVER EFFECTIVELY; (D) A SINGLE AMPLIFIER HAVING AN INPUT AND AN OUTPUT; (E) MEANS CONTINUOUSLY CONNECTING ALL THE TRANSMITTER OUTPUTS IN PARALLEL TO THE AMPLIFIER INPUT, EACH TRANSMITTER HAVING AN OUTPUT IMPEDANCE HIGH AS COMPARED TO THE AMPLIFIER INPUT IMPEDANCE; (F) MEANS CONTINUOUSLY CONNECTING ONE POWER INPUT OF EACH RECEIVER IN PARALLEL TO THE AMPLIFIER OUTPUT; (G) POWER SUPPLY MEANS; (H) A PLURALITY OF VARIABLE IMPEDANCE MEANS CORRESPONDING IN NUMBER TO SAID PLURALITY OF TRANSMITTERS, EACH VARIABLE IMPEDANCE MEANS HAVING A POWER INPUT, A CONTROL INPUT AND A POWER OUTPUT; (I) MEANS CONNECTING THE POWER INPUTS OF ALL THE VARIABLE IMPEDANCE MEANS TO THE POWER SUPPLY MEANS; (J) MEANS CONNECTING THE POWER OUTPUT OF EACH VARIABLE IMPEDANCE MEANS TO A POWER INPUT OF A CORRESPONDING TRANSMITTER AND TO THE OTHER POWER INPUT OF A CORRESPONDING RECEIVER; (K) EACH SAID VARIABLE IMPEDANCE MEANS HAVING: (1) A HIGH IMPEDANCE BETWEEN ITS POWER INPUTS AND ITS POWER OUTPUT AND BEING INEFFECTIVE TO TRANSMIT POWER WHEN NO CONTROL IMPULSE IS RECEIVED AT ITS CONTROL INPUT, AND (2) A LOW IMPEDANCE BETWEEN ITS POWER INPUT AND ITS POWER OUTPUT AND BEING EFFECTIVE TO TRANSMIT POWER, WHEN A CONTROL IMPULSE IS RECEIVED AT ITS CONTROL INPUT; AND (L) SEQUENTIAL CONTROL MEANS FOR SUCCESSIVELY TRANSMITTING CONTROL IMPULSES TO THE CONTROL INPUTS, ONE AT A TIME.