DE383339C - Arrangement for double talk circuits according to the pupin system - Google Patents

Description

GERMAN EMPIRE

ISSUED OCTOBER 12, 1923

REICH PATENT OFFICE

PATENT LETTERING

- JV * 383339 - CLASS 21 a GROUP 25

(B. 107630

Bergmann-Elektricitäts-Werke, Akt-Ges. in Berlin.

Arrangement for double-talk circuits according to the pupin system. Patented in the German Empire on December 15, 1922.

For double-talk circuits that are equipped with self-induction coils according to the pupin system the difficulty arises

for the double speaking circuit. According to the invention, this can now be done in a special way easily achieve that the

a correct effect of the self-induction- total load by self-induction-5 coils at the same time for the single speaking circuits as coils in a base load and an additional 10

Claims (4)

& S3339 additional load is broken down, with the base load simultaneously for both the respective single speaking circuit is effective as for the double speaking circuit, the additional On the other hand, a burden only for one or the other. With a suitable dimensioning of the Self-induction coils can then be completely compensated for by the basic load j for the one speaking group, while j ίο rend the basic burden with the additional Load together results in the compensation for the other speaking group as well. In the drawing, two exemplary embodiments of the new arrangement are illustrated, in which a ¹ and he are the lines of one, b ¹ and b "are the lines of the other single-voice circuit. The load with self-induction is achieved by sets of coils consisting of two in row lying induction coils c, consist d. Of these, the coils c consistently as a single coil carried out are, while belonging to a single circuit coil d pairwise combined to double rinse. For the double-talk circuit form a ¹ and a ² in parallel connection a, b, ^l and b * but the other line. the effect of c is the self-induction coils, regardless of whether the lines α are throughput in series or in parallel circuit of a current flowed ¹ and α ^2, or b ¹ and b ¹ '. These coils are, accordingly, both the single speaking circuit as effective for the double speaking circuit and thus represent the basic load. In the case of the double coils d, on the other hand, the W effect from the special circuit, so that they deliver a self-induction either only when connected in series or only when the lines α ¹ and α ² or b ¹ and b ^{2 are connected in parallel.} As a result, the additional load is obtained by means of these double coils. According to Fig. 1 it is now assumed that the double-talk circuit requires the lower load with self-induction. The circuit of the self-induction coils d is therefore made so that they only come into effect when the lines a ¹ and α ² or the lines b ¹ and b ^{2 are connected in series} , that is, only for the associated single-voice circuit, while; the self-induction for the double-talk circuit is obtained by the basic load coils c alone. On the other hand, it is assumed according to Fig. 2 that a higher self-induction is necessary for the double- talk circuit, and the self-induction coils d are accordingly connected in such a way that they only have an effect for the double-talk circuit, but not also for the single-talk circuits. P ATECT- APPROACH: i. Arrangement for double-talk circuits according to the Pupinsystem, characterized in that the total load from self-induction coils is divided into a basic load (c) and an additional load (ei), the basic load (c) each for the single and the double-talk circuit, the additional Stress (d), on the other hand, is only effective for one or the other of these two speaking groups. 2. Arrangement according to claim 1, characterized in that the basic load (<:) per se the compensation for the double speaking circuit and the basic load (r) together with the additional load (d) results in the compensation for the single speaking circuits. 3. Arrangement according to claim 1, characterized in that the basic load (c) the compensation for the single speaking circuits and the basic load (c) together with the additional load (rf) results in the compensation for the double speaking circuit. 4. Arrangement according to claim 1 to 3, characterized in that of the series self-induction coils (r, d) of a line, a part (c) designed as a single coil, the other (ei), however, in pairs with corresponding self-induction coils of the other line of the same Single voice circuit is combined to double coils, the single coils (c) each providing the basic load, the double coils (ei) the additional load. For this purpose ι sheet of drawings. Serum, printed in the Reichsdruckerei.