Abstract: A sensor (10) for determining angular velocity includes one or a plurality of piezoceramic plates (11, 12, 31 to 34), which are suitably oriented with respect to the axis of rotation and execute shear oscillations with the aid of an exciting circuit. If the sensor (10) is located in a rotating system, piezoelectric charges are generated on specific plate surfaces by generated Coriolis forces (K.sub.c). These charges represent a measure of the rotational velocity (.OMEGA.).

Abstract: A toroidal core coil winding appliance is provided including a toroidal core mount, a wire feed and a conveyor means for shaping and turning wire loops through the toroidal core opening which further includes at least two stationary conveyor sheaves and a plurality of deflection rollers whose rotational axes are arranged parallel to one another and preferably perpendicular to the rotational axis of the toroidal core. Flexible conveyor belts are guided on the conveyor sheaves with the assistance of the deflection rollers, these flexible conveyor belts being pressed against one another over longer sections of the wire loop paths. The wire loops are clamped between the conveyor belts and are drawn through the toroidal core openings. After the acceptance of a defined wire length in the conveyor means, the wire feed is stopped and, at the same time, the clamped wire end is deflected out of the conveying plane of the wire loop.

Abstract: A radio interference suppression choke with a low leakage field, includes a ring core formed of magnetically soft material, a plurality of windings each formed of a respective continuous wire wound on the core in separate respective series-connected winding sections, the windings having mutually adjacent transition regions, and an insulating cap disposed on the core separating the windings at least at the mutually adjacent transition regions thereof.

Abstract: Method of forming windings on a closed core, preferably a ring core, for electric coils which includes guiding by action of a magnetic field a magnetizable needle fastened to a starting end of a winding wire along a closed continuous travel path extending partly through an aperture in the core so as to wind the winding wire on the core, the closed continuous travel path decreasing in length with duration of winding of the winding wire on the core.

Abstract: An article for the recording and storage of information includes a support and a layer for storing information provided on the support. The layer is amorphous and composed of a mixture which includes an element of the group bismuth, antimony and selenium and a different element of the group selenium and tellurium. Information may be recorded on the layer by burning away selected regions thereof with high-energy radiation such as a laser beam. A preferred mixture includes bismuth and selenium with the weight ratio of bismuth to selenium being between about 1:2.5 and 1:3.5 for radiation having a wavelength corresponding to visible blue light and with the proportion of selenium being increased for longer wavelengths such as those corresponding to visible green and red light. The layer has a thickness which corresponds to a fraction of the wavelength of the radiation used for recording and the layer is optically opaque.