| 摘要 |
<p>1531316 Alarm systems AMERICAN DISTRICT TELEGRAPH CO 19 July 1976 [10 Nov 1975] 29920/76 Heading G4H In an alarm system for transmitting alarm signals from a plurality of remote stations to a central station by radio signals encoding binary data words, each of the remote stations includes a plurality of alarm sensors, alarm sensor sequencing means responsive to the alarm sensors indicating the occurrence of an alarm condition for cyclically selecting each of the sensors in turn and for producing a plurality of binary coded output signals identifying the selected sensor, and radio transmitting means operatively connected with the alarm sensor sequencing means for operation thereby when said sequencing means selects an alarm sensor which senses the occurrence of an alarm condition.</p> |
