Emergency signalling system having manually operated generator

摘要: A remote electrical signalling system in which emergency call stations are manually operable to communicate with a home station, and confirmation signal is automatically transmitted back from the station when has been properly received. The each include an electromechanical generator power both transmitter section receiver section. Switch means provided direct limited duration output first then Power recycled re-energize if not received within pre-determined period of time. At calls identified. blocking circuit prevents recording identifying digit or transmission unless previous digits identification have recorded.