DE439938C - Circuit arrangement for wireless telegraphy and telephony by means of frequency multiplication - Google Patents

Description

(L 55552

Methods are known in which DC magnetized iron chokes with an antenna circuit are connected in such a way that the antenna circuit more or less detuned from the machine circuit and thereby the antenna current can be changed to the rhythm of the language or the telegraph characters. With the present invention, the direct current magnetized iron choke is switched into the multiplier circuit of a high-frequency machine system, whereby the frequency multiplication process is influenced in such a way as a result of the self-induction and change in resistance of the iron choke that the antenna coupled to the multiplication circuit can be controlled in the rhythm of the telegraphic characters or speech. In the embodiment of Fig. R is I of the primary circuit of a high frequency machine system which is tuned by the capacitance C ₁ and the inductance I ₁ to the basic frequency, M is the machine / _x is the multiplication transformer whose primary coil is located in the fundamental period circuit I and the Iron body is strongly saturated by the fundamental frequency current. The secondary coil of the frequency transformer ^ ₁ is connected to the multiplication circuit II, which contains the capacitance c ", the self-induction I ₂ and the DC-magnetized iron choke d _2. The multiplication circuit is also coupled to the antenna.

The choke coil, which is expediently made up of two separate iron cores with separate high frequencies and common DC winding

tion exists, can directly into the multiplication circle connected in series (Fig. i) or in parallel (Fig. 2) for "self-induction" or by means of a transformer (Fig. 3).

A greater sensitivity can be achieved by switching on a capacitor c ₃ (Fig. 4). The circuit shown in Fig. 4 corresponds, apart from this capacitor c ₈ , to the circuit according to Fig. 2. Another embodiment of the invention is shown in Fig. 5, in which the iron choke is variably branched off from the self-induction. A capacitor C _{3 is also} provided in this circuit. Otherwise, the same reference numerals apply to the circuits according to Fig. 2 big 5, while in the direct current circuit the iron choke either directly or with the interposition

ao of an amplifier, a microphone W ₁ for speech purposes or a key t _a for sending telegraph signals is switched on.

Claims (5)

Patent claims: i. Circuit arrangement for wireless telegraphy and telephonic by means of frequency multiplication, in which the frequency multiplication by means of high iron saturation of a transformer by the alternating machine current is achieved, characterized in that a direct current magnetized as an influencing organ Iron throttle is switched on in the multiplication circuit 35 '. 2. Circuit arrangement according to claim i, wherein the DC magnetized Iron choke connected directly or as a transformer in series with the tuning means of the multiplication circuit is, 3. Circuit arrangement according to claim i, wherein the DC magnetized Iron choke in parallel with the capacitance or self-induction of the multiplier circuit lies. 4. Circuit arrangement according to claim i, wherein the DC magnetized Iron choke can be tuned to the transmission wave with the help of a capacitance. 5. Circuit arrangement according to claim ι to 4, according to which the DC magnetized Iron choke consists of two iron cores, the high frequency and direct current winding against each other are switched so that the voltage of double frequency is canceled. Fig. 1 .. Fig. Berlin, printed in the Reichsdruckerei.