Procedure for overlaying power networks with an alternating signal voltage that is as independent of the load as possible
DE619619C
Remote control arrangement
DE599754C
Arrangement for superimposing heavy current networks with audio-frequency currents
DE575838C
Method for multi-point superimposition of meshed sub-networks of a direct current network fed from a three-phase network at several points via converters by means of control energy of non-network frequency
DE526104C
Device for the multi-point superposition of heavy current networks from a common transmitter station with currents of non-network frequency
DE530144C
Transformer for the series superposition of high-voltage networks with currents of non-network frequency with a compensation winding, the field of which is opposite to the transformer winding through which the mains current flows
DE515221C
Process for the operation of communications equipment over power lines by means of superimposed frequency currents, which according to the main patent 446981 are taken from a frequency band generated by frequency variation of a generator and superimposed
DE472923C
Method for overlaying extensive power networks
DE542080C
Method for superimposing power networks, in particular those that are more or less fully developed, with control currents of non-network frequency
DE567341C
Method for signaling by means of superimposed alternating currents over armored heavy current single conductor cables
DE540681C
Device for rhythmic triggering of switching processes by means of superimposed frequency currents
DE609847C
Device for the transmission of single-phase audio-frequency secondary currents on multi-phase power lines, in which the main transformers of the multi-phase line are bridged by earth circuits for the audio-frequency secondary currents
DE503734C
Device for the operation of resonance apparatuses that respond to superimposed beats
DE467858C
Device for checking the entire switching state of a network caused by superimposed currents
DE487967C
Device for overlaying permanently or temporarily interconnected networks or network components with several feeding power plants or feed transformers
DE591390C
Device for the remote operation of counters, tariff devices, etc. Like. About power lines with the help of electrical resonance apparatus
DE468198C
AC overlay center
DE458707C
Device for regulating DC shunt motors for driving high-frequency machines
DE446981C
Device for the generation and transmission of occasional or periodically required tone-frequency alternating currents of different frequencies via lines, in particular power lines, for operating resonance devices of all kinds, in particular electrical slave clocks
DE396611C
Process for the production and reproduction of photographic recordings in colors
