Communications: electrical – Digital comparator systems
Patent
1977-08-31
1979-01-30
Pitts, Harold I.
Communications: electrical
Digital comparator systems
340147SY, 340147LP, 340168R, H04Q 900
Patent
active
041375220
ABSTRACT:
A plurality of individual control units transmits control signals, each to a corresponding controllable object. The control signals from the different units are arranged in a predetermined sequence, each control unit having a self-address which signifies its position in the sequence. The self-address is stored in the unit and transmitted in the control signal. Each unit has a receiver receiving the control signals from the other units and deriving an external address signal therefrom. The external address signal presets an address counter. After termination of the received control signal, pulses are added to the address counter until its counting output is equal to the self-address of the unit. The unit then transmits its control signal, but only if no new control signal is being received. Since the self-addresses increase as the position in the sequence increases, the presetting of the address counter causes units having a lower self-address than the preset number to be blocked. Self-address changing circuits are provided to allow incorporation of a unit or units into a different sequence.
REFERENCES:
patent: 3820070 (1974-06-01), Fox
Berman Hans
Pitts Harold I.
Rich Marianne
Steuerungstechnik GmbH
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