Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filedfiledCritical
Priority to JP13073172UpriorityCriticalpatent/JPS577108Y2/ja
Priority to CH1608073Aprioritypatent/CH580312A5/de
Publication of JPS4985979UpublicationCriticalpatent/JPS4985979U/ja
Application grantedgrantedCritical
Publication of JPS577108Y2publicationCriticalpatent/JPS577108Y2/ja
G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
G08B27/008—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations with transmission via TV or radio broadcast
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N7/00—Television systems
H04N7/10—Adaptations for transmission by electrical cable
