Device for transmitting an alarm signal via telephone channels between a transmitter station and a receiver station.

摘要

1. Installation for the transmission of an alarm signal by a telephone channel, between an emitter set (100) and a receiver set (30), comprising at the emitter set : a) means (MF2 ) for detecting and shaping a signal delivered by alarm means (106, 107) b) a central unit (110) sensitive to the detecting and shaping means and adapted to control c) a line taking relay (RPL) via d) an interface (AC1 ), upon the emission of a signal by the alarm means, e) tone detecting means (160) connected to the central unit (110) and adapted to check the tone, after looping of line (20, 21) by the line taking relay, these tone detecting means being coupled to the telephone line via f) galvanic insulation means (T), g) a dialling relay (RN) adapted to dial a call number corresponding to the receiver set (30), by impulse break fo the line, and controlled by the central unit (110) h) a memory adapted to record information indicative of the call number of the receiver set (30) and i) a keyboard (C) for introducing into the memory the information indicative of the call number, j) display means (120) displaying the call number introduced into the memory, for verification, k) emitting means (170) controlled by the central unit (110) and coupled to the telephone line, via the galvanic insulation means (T), adapted to emit towards the receiver set (30) a signal indicative of an alarm, l) ringing detection means (MDS, MF1 ), coupled to the telephone line and adapted to detect a call of the emitter set, coming from outside, characterized that : - the interface is composed of first current amplifier means (AC1 ) - the dialing relay (RN) is controlled by the central unit via a second current amplifier means (AC2 ), - second galvanic insulation means connect the ringing detection means (MDS) to the central unit, and that said installation further comprises : m) timing means adapted to control the sending of a new emission of the signal indicative of an alarm, if the emitter set (100) has not been called back several times from the outside, in a determined period following the emission of the prior signal indicative of an alarm.