Provision of long travel circuit with isolated joints equipped in one extremity with an alternate power generator and in the other with a receiver. (Machine-translation by Google Translate, not legally binding)

摘要

Long-path circuit arrangement with insulated joints equipped at one end with an alternating current generator and at the other with a receiver, characterized in that, on the one hand, the generator is provided to provide a voltage whose frequency is approximately equidistant from the fundamental frequency of the traction current and its harmonic of order 2, happening in trains the pulses emitted at a very low repetition frequency, and because, on the other hand the receiver is equipped with an amplitude discriminator and with a selective demodulator to the repetition frequency, said amplitude discriminator comprising two magnetic circuits of rectangular characteristic, carrying one two windings and functioning as a transformer, the other carrying only a single winding having more turns than the primary winding of the first and in series with this one, receiving the whole input voltage while the tension the output is provided by the secondary of the first magnetic circuit, the demodulator comprising, on the other hand, a transformer with two secondary windings whose primary constitutes the circuit input, the first of these secondaries feeding the primary winding of a magnetic circuit of characteristic. Rectangular, whose secondary feeds an output transformer through a winding of a second magnetic circuit, another winding of this second circuit is fed in series with a third winding of the first circuit by the current of a transistor whose base is powered, by means of of a potentiometer, by the voltage of the second secondary of the input transformer, means being provided to equalize the current of said transistor in the two windings it feeds. (Machine-translation by Google Translate, not legally binding)