Doorbell and security entry device for apartment building has switching device controlled by input of morse code via doorbell line for operation of door opener

摘要

The device has a doorbell unit with a respective doorbell button (5,6,7,8) coupled to a doorbell (17,18,19,20) in each apartment (13,14,15,16) via a doorbell line (9,10,11,12), a door operating button (30,31,32,33) in each apartment coupled via a signal line (22,23,24,25) to a door opener (47). A switching device (34,35,36,37), provided with a memory storing a morse code, has an input for the doorbell line, an output for the doorbell and a switching output for the door opener, supplied with a signal when a morse code entered via the doorbell line corresponds to the stored morse code.