Battery-powered, radio-controlled actuator detects defined sequence of frequency patterns, has switching arrangement controllable by activation signal, visual and/or acoustic indicator element supplied with energy via switching arrangement

摘要

The device has an energy storage device (BATT) for supplying the actuator (AKT) with electricity, a receiver circuit (E) with at least one filter bank and at least one connected logic evaluation circuit for generating an activation signal if a predefined sequence of frequency patterns occurs, at least one switching arrangement (S1) controllable by the activation signal and an visual and/or acoustic indicator element (L, LS) supplied with energy via the switching arrangement. An independent claim is also included for a call system for old people's homes, care homes or hospitals.