Alarm system for lift (elevator) breakdowns

摘要

Alarm system which is essentially characterized in that it comprises the arrangement of a telephonic transmitter 3 which is self-powered by battery 4 and installed in the lift plant machinery room and which is connected to a pushbutton 2 and a loudspeaker microphone 5 located in the lift car 1, the telephonic transmitter 3 also being connected telephonically in an encoded manner to a permanently manned call-receiver centre 8.