| 摘要 |
1343760 Selective signalling NORTHERN ILLINOIS GAS CO 10 Dec 1970 [10 Dec 1969] 37281/73 Divided out of 1343759 Heading G4H A central station sends a set of readout signals to a remote station where each signal causes readout of a respective bit of a data signal from a shift register to the central station, power being supplied to the shift register only while the readout signals are being received. The particular embodiment is a modification of that in the parent Specification 1,343,759, being similar, mutatis mutandis, except that the telephone network is used for communication between the stations. Use of microwaves is also mentioned. Disclosure of the parent is also repeated. |
