Abstract: A circuit for at least two frequencies comprises a high frequency filter and a low frequency filter and a pair of series connected terminating resistors, the high frequency filter being connected to a first terminating resistor and directly to a common circuit point, the low fequency filter being connected to the connection between the two resistors and the order of magnitude of the terminating resistors being the same as the order of magnitude of the required terminating resistance of the filters.

Abstract: A gas discharge indicator device including a discharge chamber provided with an anode and a cathode between which is produced a gas discharge producing UV radiation, the discharge chamber being provided with at least one coating of light emitting material which emits visible light in response to the emitted UV radiation, and a light transmitting panel which delimits the discharge chamber at least on one side, and through which the visible light is observable, is provided with material disposed on at least part of the surfaces delimiting the discharge chamber for reflecting UV radiation in order to increase the proportion of emitted UV radiation conducted onto the layer of light emitting material.

Abstract: A microwave circulator comprising a substrate having a resonator affixed to one side thereof and a ferrite element affixed to the other. The side of the substrate to which the ferrite element is secured is covered with metal on the surface surrounding the ferrite element and is electrically and mechanically coupled to a metallized coating on the periphery of the ferrite element. The surface of the ferrite element projecting from the substrate is also metallized.

Abstract: In a control apparatus for connecting three-phase current systems having respectively different frequencies to a high-voltage D.C.

Abstract: A method for guiding the final phase of a ballistic missile wherein the target and the missile are continuously tracked to determine their positions with respect to the missile firing platform; the actual coordinates of the missile position, which are continuously being furnished by the tracking system, are constantly compared with nominal coordinates determined by a fire control computer and the deviation is computed therefrom; a correction signal, as to magnitude and direction of the path of the missile is generated from the deviation and is transmitted to the missile as a wireless, coded signal; and this correction signal, together with measurements for the dynamic flight characteristics are translated in the missile into a triggering pulse to actuate a path correction for the missile.

Abstract: The circuitry is used, for identifying television transmitters, in a television set receiving synchronizing signals and line flyback pulses characteristic of television transmitters, particularly for television receivers including a station finder circuit. The circuitry, during the time period of the line flyback pulses, derives samples of those signals appearing above the black level of the video signal, from the demodulated input signal. The number of amplitude jumps determined during the time period of the line flyback pulses is utilized as the criterion for identification of a television transmitter. The signals appearing above the black level of the video signal are inverted and then combined, in an AND circuit, with the line flyback pulses, and the output of the AND circuit is connected to a digital counter circuit to supply the output pulses thereto as counting pulses, with the flyback pulses being supplied to the digital counter circuit as gate pulses.

Abstract: Surface passivated semiconductor device including a semiconductor wafer in which a surface portion which intersects a pn-junction is covered with an organic passivation layer. The passivation layer consists of a partially fluorinated hydrocarbon polymer and is formed as a continuously molten coating which is produced by coating the surface portion with a powder which contains predominantly particles of a grain size less than 30.mu.. A method is provided for producing the device.

Abstract: An integrated circuit comprises a semiconductor body with a metal path running at least partially on the component side surface of the semiconductor body itself.The invention also includes the method of making the arrangement.

Abstract: A circuit arrangement for automatic dynamic compression and/or expansion having an auxiliary circuit provided in the useful signal path or in the negative feedback path of an amplifier. The auxiliary circuit has a first and a second connection point. On the one hand there are arranged between the first and the second connection point a first damping or amplifying member, an electronically controllable damping member and a second damping or amplifying member connected in series. On the other hand means for limiting the voltage or current are arranged between the first and second connection point.

Abstract: A variable gain alternating voltage amplifier having a d.c. negative feedback loop for setting the operating point of the amplifier wherein a change in gain of the amplifier is effected by a variable resistance feedback loop which is connected in parallel with the d.c. negative feedback loop and includes the series connection of a controllable resistor and a capacitor.

Abstract: A radiation-emitting semiconductor diode comprises a semiconductor body with a pn-junction running parallel to one of its main surfaces a groove in said semiconductor body for delimiting the pn-junction and interrupted by a web and connection means on the web for connecting an electrode within the area delimited by the groove and a connection point outside this area.

Abstract: Adhesion imparting layer applied to an insulating material serving as a base material in the production of printed circuit boards. The adhesion imparting layer consists essentially of an elastomer of acrylonitrile-butadiene copolymer cross-linked with an organic peroxide.

Abstract: In a procedure in which data is ciphered at a transmitter by being linked with key data generated by a code text generator and is deciphered at a receiver by appropriate linkage of the ciphered data with the same key data generated by an identical code text generator, the code text generator in the transmitter produces a pseudorandom sequence which determines the starting state of the generator and a formation rule, and the code text generator of the receiver is set to produce the same pseudorandom sequence by transmission from the transmitter to the receiver of an enciphered signal sequence defining the starting state and formation rule which determines the sequence to be produced by the transmitter code text generator.

Abstract: A gas-blast circuit breaker having cooperating stationary and movable power contacts, a movably arranged cylinder, a stationary piston disposed in the cylinder and slidable with respect thereto, a compression chamber defined by an end face of the piston and the inside of the cylinder, a drive rod operatively connected to the cylinder and the movable power contact for displacing them relative to the piston and the stationary power contact, respectively, a nozzle affixed to the cylinder and having an opening oriented towards the location where an electric arc is generated between the stationary and movable power contacts during displacement of the movable power contact away from the stationary power contact and a hollow guide sleeve connected to the drive rod and movable therewith as a unit. The movable power contact is supported within the guide sleeve and is displaceable with respect thereto.

Abstract: A method of aligning a body in a desired position comprises producing an image from the body which is then broken down into image points with a spacing smaller than the required accuracy, storing the information content of the image points in digital form, comparing the stored information with desired information and moving the body accordingly.

Abstract: A semiconductor device including a semiconductor body having at least one ohmic electrode and at least one blocking electrode, wherein an ohmic electrode or a blocking electrode is disposed on the side surface of the semiconductor body and wherein in the case where an ohmic electrode is disposed on the side surface, the ohmic electrode has adjacent to it a blocking electrode which is on a major surface of the semiconductor body and, in the case where a blocking electrode is disposed on the side surface, the blocking electrode has adjacent to it an ohmic electrode which is on the major surface.

Abstract: In the operation of a control arrangement for the direct voltage of an inverter station which inverter station includes a plurality of thyristor bridges which are connected in series at their direct voltage side and connected to a three-phase mains via a plurality of variable ratio transformers each individually associated with a respective thyristor bridge, a plurality of extinction angle circuits each associated with a respective thyristor bridge, and a total control circuit for controlling the voltage of all thyristor bridges together, the control circuit providing an output corresponding to the direct voltage of the inverter station and responding to a setting value representative of the transformer stage adjustment which operates in synchronism for all thyristor bridges, the control arrangement is matched to the control path by comparing a measured value which corresponds to the direct bridge voltage of each thyristor bridge with the instantaneous maximum value of the measured values for all thyristor br

Abstract: A directional radio system with single sideband operation for the transmission of a carrier frequency modulated single sideband signal in the intermediate frequency plane. In the transmitter, the intermediate frequency signal which contains the base band is provided with at least two pilot signals of different frequency and in the receiver a tuning criterion for the mixing oscillator of the receiver is derived from the frequency spacing of the received pilot signals and from the frequency shift of the received pilot signals produced by transmission of same over the radio links.

Abstract: A controllable semiconductor rectifier which is subject to an interference potential and controllable by a control power comprises a first emitter layer, a first main electrode connected to the first emitter layer, a control base layer connected to the first emitter layer, a main base layer connected to the control base layer and a second emitter layer connected to the main base layer. A connection is established between a portion of the control base layer and the first emitter layer for applying a compensating potential to the first emitter layer for compensating the interference potential and a limiting non-linear component is connected between a portion of the control base layer and the first emitter layer for limiting the interference potential.

Abstract: A direct current, high-speed circuit breaker which is connected in series at the direct current side of one of a plurality of inverters connected in parallel in a high voltage transmission system, and which is caused to open when the magnitude of the direct current to the one inverter exceeds a threshold value, is further controlled to open in response to the occurrence of a commutation failure only when such failure occurs simultaneously with reduction of the commutation voltage of the one inverter below a rated value by more than a first predetermined magnitude such that proper operation of the one inverter is no longer assured, and the threshold value of the direct current is increased from a normal value to a selected higher value in response to a reduction of the commutation voltage below the rated value by more than a second predetermined magnitude which is less than the first predetermined magnitude.