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.