ES434607A1 - Emitter equipment-multiple receiver of alarm signals, for protection of establishments. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Multiple emitter-receiver system of alarm signals, for the protection of establishments, relating a plurality of different premises to a central, headquarters of security forces, essentially characterized by the provision, in each of the protected establishments, of a transmitter unit that comprises, in a compact mounting box, an emitter of modulated electromagnetic radiations, consisting of three signals of different frequencies, coded in wavelength, phase and sequence, being therefore in operation by the excitation of at least one of different devices sensors placed in the zones and next to the objects to watch, whose excitation, due to the presence of people and variation of the position of certain objects, will cause the sending of alarm signals without production, in the establishment, of perceptible signals, presenting in addition, the transmitter unit has a recovery device with a timer. Or adjustable that allows the circulation of the personnel of the protected establishment and the use by the same of the objects monitored without the emitter's action, which is completed with voltmeters indicating the input and supply voltage of circuits, switch-switches operated by key and auxiliary indication pilot lights. (Machine-translation by Google Translate, not legally binding)