Method of self-modulation of a generator in the field of the braking means of relaxation oscillations

摘要

434,326. Valve modulating circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE 12, Hallesches Ufer, Berlin. Jan. 25, 1935, No. 2573. Convention date, Jan. 31, 1934. [Class 40 (v)] For ultra-short wave signalling, the carrier-wave from a Barkhausen-Kurz generator R is modulated at constant frequency by a relaxation-oscillation circuit, comprising a glow-discharge tube Gland a tuned circuit S in series with a condenser C. The modulating circuit is shunted across the plate B and cathode K of a generator valve R stabilized by a piezoelectric crystal L. For Morsing, the glowdischarge tube may be switched on and off by a keying-device inserted in series or parallel with it. The Specification as open to inspection under Sect. 91 describes a circuit arrangement similar to that shown but without the tuned circuit S. This subject-matter does not appear in the Specification as accepted.