Abstract: A device including at least one magnetoresistor for sensing the position of a ferromagnetic part which moves past the magnetoresistor. The magnetoresistor is influenced by a permanent magnet which is mounted near the magnetoresistor in a housing which contains the magnetoresistor. The device is useful as a position, direction, or speed sensor.

Abstract: A circulation fan for circulating air in the baking muffle of an oven in which a conductive connection is made between the drive shaft and the back wall of the baking muffle whereby the RF energy passing outward over the surface of the drive shaft is short-circuited via the back wall of the baking muffle. The conductive connection is in the form of a spring element, e.g. a clamping member or a disk spring, whereby manufacturing and operational variations are compensated for. If the portion of the drive shaft located outside the baking muffle is roughened and/or covered with an electrically poorly conducting coating, further damping of the escaping RF energy is obtained.

Abstract: To improve the stability and optical transmission properties of an optical waveguide module (1), a fillet-shaped supporting body (12, 13, 13') is used to hold the end (15) of a fiber, particularly of a polarization-maintaining fiber. The top side of the supporting body contains a groove (14) which extends in the direction of the body's longitudinal axis and in which the fiber end (15) is completely sunk and embedded in adhesive. After proper alignment, polished end faces of the fiber and the supporting body (12, 13, 13') are attached to the substrate (2) with adhesive.

Abstract: A transmitting station for a navigation system with dual transmitters (20A, B) is disclosed in which the dummy load, which commonly trerminates the active-standby transmitter instead of the antenna system, and the associated high-performance changeover switch are omitted. Instead, the two transmitters are operated in constant alternation. This permits better monitoring with less costly and complicated equipment.

Abstract: For a digital communication system comprising a plurality of repeaters between two terminals from one of which the repeaters are to be selectively controllable for fault-location or remote-control purposes, repeaters are disclosed each of which has its address stored unalterably in its address memory, so that the address resembles a serial number as is commonly used as an equipment identification. This saves any adjustment work during the installation of repeaters into the communication system. Also disclosed is a fault finder for such a communication system which is capable of successively interrogating the repeaters in the system for their addresses and their locations in the system, and of writing these addresses together with the associated locations into a memory. The repeaters then contain suitable devices which cooperate with this fault finder.

Abstract: In a direct-current machine comprising a permanent-magnetic stator, the detent torque or resting moment of the rotor is to be reduced by simple and low-cost technical means. This is achieved by disposing the permanent-magnet shells of the stator asymmetrically with respect to each other.

Abstract: An electrically commutated, collectorless direct-current motor is disclosed whose stator has a self-supporting drum winding and a cylindrical plastic body which is located concentrically with the drum winding in a winding head. The cylindrical plastic body has recesses which contain eyehooks. The ends of the drum winding are connected with the eyehooks, which are welded to a circuit board. The invention makes it possible to automate the connection of the winding ends to the circuit board.

Abstract: A circuit for deriving a temperature-independent square-wave signal from a measurement signal which consists of a DC component and an AC component and which is taken across a magneto-resistor exposed to an alternating magnetic field. The circuit has a controllable impedance, a timing section with a relatively long time constant, and operational amplifiers with FET inputs.

Abstract: An electronically commutated, collectorless direct-current motor is disclosed whose stator has a drum winding and an external magnetic yoke surrounding same, and whose rotor consists of a shaft, a multipolar, permanent-magnet body, and an internal magnetic yoke. To reduce the moment of inertia, the internal magnetic yoke has kidney-shaped apertures. The direct-current motor exhibits a good dynamic behavior and is used in data processing equipment.

Abstract: A pulse generator having a plunger for actuating several contacts. The plunger is guided in a housing and is slidable in the direction of and rotatable about its longitudinal axis against the action of a spring and is provided with at least one actuating member capable of entering into non-positive engagement with at least one contact both in at least one of its longitudinally adjusted positions and in at least one of its rotated positions. The plunger has a hole which runs parallel to the direction of sliding and contains a second plunger which is slidable and/or rotatable against the action of a spring associated therewith. There is an actuating member on the second plunger.

Abstract: A rotary switch, adapted to be secured to a panel, comprises a stator having a bearing flange provided with a cylindrical side wall and an underside; a circumferential groove provided in the side wall and an annular groove provided in the underside; and a rotor extending over the bearing flange and having a cylindrical side wall surrounding the cylindrical side wall of the bearing flange. The rotor is rotatably supported on and relative to the stator. There are further provided a stationary contact mounted in the stator; a movable contact carried by the rotor for displacement relative to the stationary contact upon turning of the rotor; and a first sealing ring received in the circumferential groove and projecting radially outwardly from the cylindrical side wall of the bearing flange. The first sealing ring sealingly and slidably engages the cylindrical side wall of the rotor.

Abstract: A heatable sorption getter body for reactive residual gas clean-up in sealed vessels is provided. The getter body includes an insulating member, two electrical contacts, and a getter composition applied over surface portions of the insulating member. The insulating member serves as a carrier for the getter composition. The getter precursor composition is applied preliminarily after which the resulting dried assembly is subjected to sintering to complete preparation of the getter composition before the getter body is positioned in a sealed vessel.

Abstract: A circuit for amplifying a measurement signal having an AC component and obtained from the tap of a voltage divider which is connected via a dropping resistor to a supply voltage and includes at least one magneto-resistor, and for shaping the measurement signal into an output signal of approximately rectangular shape. To simplify the circuit and reduce the number and size of the components and leads to a minimum, the current produced by the supply voltage is changed essentially in accordance with the changes of the AC component of the measurement signal by connecting a controllable impedance into the supply-voltage lead, the impedance being controlled by the measurement signal.

Abstract: The antenna has a main reflector (1), a subreflector (4a, 4b, 5a, 5b), and a feed radiator (2) which are all rotationally symmetric about a common axis (10). In a section in the direction of this axis of symmetry (10), the subreflector has the shape of two curves meeting in the axis of symmetry. Seen from the feed radiator, these curves are concave. Each of the two curves has at least one step (6a, 6b) for matching the feed radiator to the transmitter or receiver.

Abstract: In a compressor for controlling the dynamic range of audio signals which comprises an operational amplifier and a gain-controlled amplifier connected in inverse parallel with the operational amplifier, the signal applied to a rectifier for producing the control signal for the gain-controlled amplifier is given an exponential waveform. This can be achieved by the use of two diodes connected in inverse parallel.

Abstract: A method of producing polarization-maintaining single-mode optical waveguides is provided wherein the preform from which the optical waveguide is produced consists of a tube, a rod of core and cladding material centrally disposed in said tube, and two differently doped pairs of filler rods disposed about said rod, the two rods of each pair being disposed diametrically opposed to each other with respect to said rod. Maximum polarization maintenance of the optical waveguide being produced is achieved by choosing the diameter ratios so that each filler rod rests against the central rod, against the inside wall of the tube, and directly against the two filler rods of the respective other pair.

Abstract: A pulse generator is disclosed comprising a toothed disk which is rotatable with a rotary shaft and is capable of actuating at least two contact pairs for generating pulses and for sensing the direction of rotation of the rotary shaft via a rocker engaging the teeth of the toothed disk by means of a mating portion, the rocker being deflectable in different directions depending on the direction of rotation of the rotary shaft, the mating portion being movable out of engagement with a tooth space and into engagement with the following tooth space, and at least one contact spring of each contact being capable of being actuated in the range of the maximum deflections and prior to the return movement.

Abstract: In a flat picture-reproducing device having a phosphor-coated faceplate (1) and a tray-shaped rear housing (2), a cathode formed by a periodic array of heating wires (7) is provided. This heating-wire array is followed by layers of focusing wires (8) and attracting wires (9) and by a perforated anode (5). A segmented counterelectrode (6) is located behind the heating wires (7).

Abstract: In a vacuum-tight picture-reproducing device having a flat glass faceplate and a metal tray-shaped back case with an outwardly curved bottom and a continuous flange, the flange has a perpendicular extension. The faceplate has end surfaces embraced by the extension and lies on the flange. The end surfaces of the faceplate and the flange with the extension are permanently joined together by a silver-containing tin-base solder. The joint may be covered by a metal layer.

Abstract: The introduction of liquid-crystal material into a liquid-crystal cell is simplified by cooling the liquid-crystal material until it has a paste-like viscosity suitable for printing. After a spacer has been positioned on a first substrate, the liquid-crystal material is introduced within the interior portion of the spacer using printing techniques. A second substrate is then placed on the spacer, and the display is sealed.