Abstract: The lamp comprises at least one light-emitting diode and an electronic power switch connected in series between a power source and the light-emitting diode. The electronic power switch is controlled by an electronic processing circuit according to the state of a control button connected to a control input of the electronic processing circuit. The button is connected in parallel to the electronic power switch. To detect and reconstitute the state of the button, the electronic processing circuit periodically applies fine turn-off pulses to a control electrode of the electronic power switch.

Abstract: The lamp comprises at least one light-emitting diode and an electronic power switch connected in series between a power source and the light-emitting diode. The electronic power switch is controlled by an electronic processing circuit according to the state of a control button connected to a control input of the electronic processing circuit. The button is connected in parallel to the electronic power switch. To detect and reconstitute the state of the button, the electronic processing circuit periodically applies fine turn-off pulses to a control electrode of the electronic power switch.

Abstract: Process for operating a security system, for the protection of persons and belongings, comprising a warning device (2) triggerable by a control unit (3), a unit (11) for activating a signalling device (7) and a means (6) of unlocking an electrically controlled lock (5), this process consisting:—in activating a timeout unit when the control unit is invoked so as to engage a timeout interval (T1),—in activating the element for unlocking the lock when the said activation unit is invoked during the timeout interval (T1), and in disabling the signalling device during the aforesaid timeout interval (T1) so that this signalling device can be activated only if the said activation unit is invoked outside of the timeout interval (T1).

Abstract: Process for operating a security system, for the protection of persons and belongings, comprising a warning device (2) triggerable by a control unit (3), a unit (11) for activating a signalling device (7) and a means (6) of unlocking an electrically controlled lock (5), this process consisting:—in activating a timeout unit when the control unit is invoked so as to engage a timeout interval (T1),—in activating the means of unlocking the lock when the said activation unit is invoked during the timeout interval (T1), and in disabling the signalling device during the aforesaid timeout interval (T1) so that this signalling device can be activated only if the said activation unit is invoked outside of the timeout interval (T1).

Abstract: Monitoring and/or alarm device and process including a central unit, at least one intrusion detection peripheral facility, signalling elements and radio link elements allowing radio links on several redundant channels between the central unit and at least one intrusion detection peripheral facility, via which channels this peripheral facility is able to transmit signals to this central unit and wherein elements check the capacity or availability of each of the link channels to transmit the expected signals, elements count the number of available channels and/or the number of unavailable channels and transmission elements transmit to the signalling elements a control signal corresponding to the number of available channels and/or to the number of unavailable channels so as to selectively activate these signalling elements as a function of the state of the control signal.

Abstract: Process and device for supplying an electronic circuit and for supplying a power-demanding facility controlled by this circuit, with electrical energy originating from at least two batteries, the electronic circuit comprising battery switching elements adapted to place these batteries in parallel or in series, the facility being subjected to controlled operating phases. The batteries are connected in series or in parallel as a function of their state with respect to two thresholds and the energy-demanding facility is controlled so as to operate according to two modes as a function of the state of the batteries.

Abstract: Monitoring and/or alarm device and process including a central unit, at least one intrusion detection peripheral facility, signalling elements and radio link elements allowing radio links on several redundant channels between the central unit and at least one intrusion detection peripheral facility, via which channels this peripheral facility is able to transmit signals to this central unit which are expected by the latter and wherein elements check the capacity or availability of each of the link channels to transmit the expected signals, elements count the number of available channels and/or the number of unavailable channels and transmission elements transmit to the signalling elements a control signal corresponding to the number of available channels and/or to the number of unavailable channels so as to selectively activate these signalling elements as a function of the state of the control signal.

Abstract: A radio receiver with isolation between an antenna and a regenerative oscillator/detector. The isolation is provided by periodically (at the receiver's quench frequency) uncoupling the antenna from the regenerative oscillator/detector. The receiver preferably includes an antenna, a super-regenerative oscillator/detector, a clock that indicates the quench frequency, a timing circuit coupled to the clock, and a switch coupled to the antenna, to the oscillator/detector, and to the timing circuit. The timing circuit specifies a first part and a second part of each clock period. During the first part of each clock period, the switch at least partially couples the antenna to the oscillator/detector on the nominal reception frequency. During the second part of each clock period, the switch at least partially uncouples these two elements on the nominal reception frequency.

Abstract: A process for allowing two or more receivers to share the same nominal frequency or close nominal frequencies, preferably without these receivers blinding one another or disturbing one another is described. The process preferably includes subjecting a radiator to temporally spaced phases of operation or maximum radiation and temporally segregating the phase sensitivity of the oscillator/detector of the receivers with respect to the phase operation or the radiation of the receiver. The receiver during the phase of sensitivity of its oscillator/detector may not detect the electromagnetic radiation from the radiator.

Abstract: An oscillator includes an active component or amplifier and a stabilizing reactive component. The active component is a bipolar transistor in a common base circuit and the reactive component is a dielectric resonator totally coupled to the collector of the transistor. A super-reactive receiver includes a bipolar transistor the base of which is connected to one pole of a power supply via a first resistor and to a common point via a second resistor and the emitter of which is connected to the same pole via a third resistor. The core of a ceramic tubular coaxial dielectric resonator is connected between the collector of the transistor and the common point. Its screen is connected to the common point. A capacitor is connected between the base of the transistor and the common point which is connected to the other pole of the power supply.

Abstract: A system for the transmission of a signal having at least two conditions includes a device for emitting signals that has two oscillators whose signal amplitudes are alternately switched according to the two conditions of the binary signal. One of the oscillators generates a first frequency and the other a second frequency. A reception device is provided and has signal detectors which are independently sensitive to the first and second frequencies so that the reception device supplies, at its output, the binary signal or the inverse thereof, which are received over the first and the second frequencies. A process for the transmission of a plurality of signals or messages having at least two conditions includes the steps of emitting signals indicative of the conditions over different transmission channels and emitting signals indicative of one of the conditions of the messages over a common transmission channel. Thus, the messages can be reconstructed after reception of one of the transmitted condition signals.