H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
340/86
H04Q 9/14 (2006.01) G06F 12/06 (2006.01) H02J 13/00 (2006.01)
Patent
CA 1252537
: 14 : ABSTRACT OF THE DISCLOSURE The domestic communication network has a main control unit which can selectively address sixteen separate stations by sending signals along the common electrical mains wiring. Each station has a unique four-bit address identity, while each signal sent out by control unit has an address signal (formed of a four-bit address word and a mask code) and a data signal. The mask code informs the stations of how many bits in the address word are to be ignored. Each station has a unit to extract, from the address signal, the mask code and input it to subtractors, for modification of the station identity and the received signal to the same number of most-significant bits. Suitable equivalence at a comparator actuates a switch for activation of a circuit.
507548
Smelt Newark G.
Trask Jeremy R.
Emi Limited
Ridout & Maybee Llp
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