ES331066A1 - Device for determining the automatic operation of telephone appliances. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Device for determining the automatic operation of telephone sets, characterized by comprising a microphone arranged to pick up the sound signal emitted by the telephone device when a call is made, exciting an amplifier which determines the closing of the supply circuit of the coil of a relay, which, in turn, closes the supply circuit of a timer, previously regulated, which acts as a switch-switch, determining, on the one hand, the closing of the supply circuit of an electromagnet, whose movable core when moving acts on a organ that keeps the telephone handset's push-button pressed, releasing it, and placing this device in listening-transmission position, and on the other hand, in a first phase of operation of pre-established duration, the start-up in the reproduction position of a recording device, and in a second phase of operation, duration also exactly pre-established, the start-up in recording position of the recording device itself or of a second apparatus of this type with which the device is equipped, finally, this clock, upon the expiration of the pre-established period of time, determines the opening of the All referred circuits, determining that the whole set recover the initial position of rest, and be able to start a new cycle. (Machine-translation by Google Translate, not legally binding)