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Publication of DK251377ApublicationCriticalpatent/DK251377A/da
Publication of DK141183BpublicationCriticalpatent/DK141183B/da
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Publication of DK141183CpublicationCriticalpatent/DK141183C/da
G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
G08B25/018—Sensor coding by detecting magnitude of an electrical parameter, e.g. resistance
