US1666753A - High-frequency telegraphing apparatus - Google Patents

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Apfil 17, 1928. 1,666,753

L. PUNGS ET AL HIGH FREQUENCY TELEGRAPHING APPARATUS Fi led Dec. 28. 1925 Lea R 123: H

' Patented Apr. 17, 1928.

UNITED STATES PATENT OFFICE.

LEO PUNGS AND ROBERT HERZOG, OF BERLIN, GERMANY, ASSIGNORS-TO CQLORENZ' AKTIENGESELLSCHAFT, OF BEBLIN-TEMPELHOF, GERMANY.

HIGH-FREQUENCY TELEGRAPHING APPARATUS.

Application filed December 28, 1925, Serial No. 78,035, and inGermany February 13, 1925.

is a diagram showing one specific -applica-' tion of our invention to an are sending circuit. y g I V In the figure Gr designates the generator, for instance an arc generator, C and C, are block condensers; C and L serve as tuning 'means; D is the choke coil in the intermediate circuit, the high frequency coil of the choke being shunted by a resistance W. L,

is the antenna tuning coil coupled to the intermediate circuit, the antenna tuning coil being connected to ground through the choke D During the radiation of the oscillations the chokes D and D are saturated, hence there is no choking effect when key T is closed. When the key is open, however, and

- when the chokes are not saturated, the antenna ceases to radiate due to the action of 80 the choke 1),. Then the energy is conducted to the intermediate circuit choke D to which the resistance W is connected in parallel, a proper proportionmg of said resistancefurmshing a simple means coacting with said "choke to regulate the performance of the generator so'as to obtain a'unifo'rm loading of same during the entire operation.

What "Weclaim is: Q 7 I 1. In a high frequency signaling system, the combination of a high frequency gen- 40 era-tor, a radiating antenna system, one or more intermediate circuits arranged between said generator and said radiating system, iron chokes placed in 531d radiating circult and in a cpreceding intermediate circuit and;

controlle simultaneously by one and the same controlling current, and a resistance connected in parallel with the choke located in said intermediate preceding circuit.

2. In .a high. frequency signaling system, the combination of an arc oscillating circuit acting upon a radiating antenna circuit, iron chokes located respectively in said oscillat ing and said antenna circuit, both chokes having controlling windings controlled by one and the same controlling current, and a resistance connected in parallel with said choke located in the arc oscillating circuit.

In testimony whereof we afiix our signatures. q

7 LEO PUNGS.

' ROBERT HERZOG.

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