Abstract: A coaxial plug connector has a supporting body made of plastic material, re being retained therein at least one contact sleeve made of metal and provided with a terminal, the contact sleeve constituting an outer contact and embracing an insulating body having a central aperture in which an inner contact having a terminal is disposed. More specifically, the insulating body and supporting body are interconnected by at least one web so as to form an integral component, which component is manufactured by means of an injection molding operation in which the contact sleeve is simultaneously embedded in the component.

Abstract: A key switch comprises a casing, at least one key slide guided in the cas against the force of a spring and at least one J-shaped leaf spring having a long spring arm and a short spring arm connected to the long arm by a curved intermediate part, the leaf spring being clamped to assume a unilateral curvature between two abutments, one fixed and the other moveable, the leaf spring having the free end of its long spring arm supported in a first abutment in the key slide and its curved intermediate part in a second abutment formed in a fixed contact member provided in the casing. For providing a minimum space the leaf spring is mounted parallel to the sliding direction in an elongated recess of the key slide.

Abstract: A key assembly for receiving units employed in communications engineering, articularly for television receivers, comprises a plurality of mutually releasable depressible keys adapted to switch on storable, selectively adjustable electrical values supplied by channel memories consisting of a plurality of voltage dividers for capacitance diode tuning, further comprising, in association with the respective depressible keys, a plurality of depressible and rotatable knobs adapted to be rotated by means of a tool, said knobs being concealed behind a cover member slidably guided in a recess, said knobs being adapted to provide channel tuning and, if required, selection of the desired frequency range, said frequency range being adjustable by rotating the respective depressible and rotatable knob into any of a plurality of detented angular positions with the knob being in a position differing from the tuning position of the knob, and comprising a switch which is adapted to be actuated by means of a push rod which is c

Abstract: A key assembly for receiving devices employed in communication engineering, particularly for broadcasting and television receivers, comprises a casing provided with mutually releasable keys in the form of press buttons adapted to switch on storable, selectively adjustable electrical values supplied by channel memories including a plurality of voltage dividers for capacitance diode tuning and including, in association with the individual press buttons, rotatable and slidable knobs for channel tuning and, if desired, for selecting a given frequency range, said frequency range being adjustable by rotating the depressible and rotatable knob into any of a plurality of detented angular positions, with said depressible and rotatable knob being in a position, preferably a depressed position, different from the tuning position.

Abstract: A keyboard comprises a base plate having conductor paths and contact areas rovided thereon, a plurality of keys associated with said contact areas, said keys consisting each of an elastically deformable snap member, the contact element thereof being adapted to be brought into contact with said contact areas by deformation upon actuation of an actuating button and being positioned above said contact areas in spaced relationship thereto. A metal frame is provided as mounting support for the snap members, said metal frame having a number, which corresponds to the number of snap members, of protrusions protruding therefrom in a direction toward the actuating buttons. Each protrusion has an opening therein, in which the snap member is held.

Abstract: The invention concerns a variable resistor of modular design comprising a using, a resistance element retained in the housing by means of a detent fastener and having a resistance guide way mounted on a carrier, and with terminal contact surfaces on extensions of the carrier, terminal pieces in electrical contact with the terminal contact surfaces, and a rotor rotatably mounted in the housing and a contact element connected for rotation with the rotor and in sliding contact with a collector element and the resistance element.

Abstract: A variable electromechanical device, such as a rotary potentiometer, incls a housing with a sleeve having a bore through which an actuation shaft extends. The shaft is provided with an annular groove. A portion of the sleeve is displaced by stamping so that it extends into the annular groove of the shaft to prevent axial movement of the latter. A projection formed on the shaft within the annular groove cooperates with the displaced portion of the sleeve for limiting the rotation of the shaft. A lubricating and braking liquid of high viscosity is filled in the groove, and one or more passages are formed on the projection so that the liquid can pass from one side of the projection to the other side thereof when the shaft is rotated.

Abstract: The disclosure is of a substrate or supporting board for supporting printed ircuits and the method of its manufacture. The boards of the invention are preferably made of a high-temperature resistant thermoplastic, sensitized to receive a printed circuit element by the dispersion of coated iron or copper particles in the thermoplastic matrix. The coating is a bonding assistant.

Abstract: A layer resistor element for use in a variable resistor has two resistance layers disposed upon each other on an insulating substrate, the lower resistance layer being provided with two comb-like sets of separating slots extending from opposite sides to form a meander-like resistance path, the widths and lengths of the meander turns varying in accordance with a given non-linear resistance characteristic. The upper resistance layer which is of a material of higher resistivity than the lower resistance layer covers the lower layer partly or totally and extends beyond the lower layer at one side thereof where it provides a path for a slider of the variable resistor.

Abstract: Apparatus for receiving remote control signals which comprise an alternat sequence of two chronologically successive pulses, the first pulse having a first predetermined frequency and the second pulse having a second frequency manually selected from a predetermined number of frequencies, each of the predetermined number of frequencies representing a command to be carried out. The receiver comprises a signal detector, a signal amplifier and a circuit for decoding the remote control signal into a group signal dependent on the first frequency and a command signal dependent on the second frequency. A controllable gate is provided for gating the command signal from the decoding circuit to a command signal register having a command signal input for each of the commands, and an input for blocking each command signal output. Means coupled to the command signal outputs implement the commands.

Abstract: A switch actuated by a control lever associated with a steering column for operating direction-indicating lamps, switching the headlights to low and high beam, operating the screen wiper and actuating similar functions includes a housing in which an end portion of a flexible band-type cable is fixed. The control lever is mounted in the housing for rocking about a pair of mutually perpendicular axes and actuating a pair of sliders each guided within the housing for movement along one of the axes. The band-type cable includes a plurality of printed conductors covered by an insulation. At the end portion of the cable, the conductors have exposed portions not covered by the insulation, which exposed portions form fixed contacts cooperating with movable contacts carried by the sliders. The remaining portion of the cable extends outwardly of the housing for connecting the fixed contacts to a power supply and the respective electrical devices operated by the switch.

Abstract: An electrical switch having conductive contact elements each pivoted about a stationary middle contact block is disclosed. The contact elements are each formed as a triangular spring open at one apex and having a bearing the side thereof opposite the open apex for engaging its respective middle contact block. The other two sides of each spring, depending on the switch position, rest under spring tension against one or the other of stationary contact blocks arranged on either side of its respective middle contact block. The ends of these two sides adjacent the open apex are formed with hooks which are positioned with a minimum of friction in recesses and oblong openings in a rotatable actuating element, under spring tension, in such a way that the contact element serves to produce a snap action as the actuating element is rotated.

Abstract: A multiple slide resistor suitable for use as a tandem resistor in a stereo system is disclosed. The slide resistor comprises a housing having a slide slot in which a slide bar is arranged to slide along a guide rail. The resistance and collector elements of each resistor are mounted upon a conductive layer on one side of a base plate which forms a closure for the housing. A shielding wall is provided between the resistors for electrically isolating them. The wall is electrically connected to the conductive layer of the base plate so as to achieve a desired cross talk attenuation.

Abstract: An apparatus for remotely controlling one or more power units including a transmitter which produces an optical pulse train having a frequency varied by an astable multivibrator controlled by keys which connect different resistances into the astable circuit, and one or more receivers. Each receiver receives the optical pulses, converts them to electrical pulses, divides the frequency, counts the electrical pulses, provides an analog output from the counter and compares that analog output with a saw tooth periodic waveform to control circuit elements which in turn control conduction through the power unit.