Abstract: In the rotation rate measuring instrument, two light beams traverse a coiled optical fiber (1) in opposite directions. The two beams emerging from the optical fiber are combined, and the rotation rate is determined from the Sagnac phase difference between the two beams. The optical fiber (1), which may be embedded in a sealing compound (4), is contained in a double-walled housing (8, 9) having its two walls linked by heat bridges (10, 10'). The material of the housing is a good thermal conductor. The heat bridges between the two walls are located so that external heat will act on the coiled optical fiber (1) at predetermined points.

Abstract: An optical fiber is coiled in an instrument in such a way that its beginning and its end belong to the same layer or to adjacent layers and are close together.

Abstract: There is disclosed a multiplier structure including elementary multipliers and a matrix of binary adder cells of the high-speed carry propagation type associated with the elementary multipliers. The intermediate results to be added are transferred along a matrix diagonal from each adder cell to an adder cell p lines and p columns distant therefrom, where p is a whole number greater than one. The matrix of binary adder cells does not contain cells associated with the first p lines and columns of elementary multipliers and is supplemented by p-1 columns or lines of additional cells on the output side of the matrix furnishing the least significant bits and by p lines or columns of additional cells on the output side of the matrix furnishing the most significant bits. The additional adder cells serve to gather the intermediate results furnished by the adder cells of the p adjacent columns and lines of the associated matrix in order to produce the bits of the final product.

Abstract: An end-play adjusting device including a molded thermoplastic sleeve-like member about the shaft of an electric motor armature, or the like. The sleeve is applied in a maximum axial length and subsequently compressed to reduce its axial length to whatever provides the desired end-play to the bearings or other support structure.

Abstract: An optical glass fiber is formed of an inner layer of germania doped glass within the bore of the outer cladding tube of silica. The tube with the higher index of refraction inner layer is rotated while being heated to collapse the bore to form an optical fiber preform. The preform is then drawn into fiber in a separate operation. A first silica layer can be deposited within the tube bore before the germania doped layer. The deposition of germania takes place under hydrogen free conditions. Appropriate heat treatment of the tube avoids excessive evaporation of germania and provides a graded transition of the refractive index in the boundary between core and cladding.

Abstract: An RF power amplifier with a pulse modulating facility is disclosed in which a pre-emphasized pulse modulating signal is derived from a plurality of amplitude values stored in a memory. The stored values are continuously changed by a control signal to give the output signal of the amplifier the desired shape. This compensates for nonlinearities and aging effects. The time required for the modulated carrier wave to pass through the amplifier need not be considered, because the envelope comparison between the amplifier output signal and the required modulating signal, which generates the control signal, is independent of the time of occurrence of the amplifier output signal.

Abstract: In a shadow-mask color-picture tube, adjustability of the deflection yoke on the tube is required. A ring is mounted around the front portion of the deflection yoke. The ring being supported by the yoke is free to move axially and can be swivelled. The ring is also lockable into a fixed position.

Abstract: A piezo-electric transducer element is disclosed which is formed by selected etchings from boron doped silicon. The transducer includes a diaphragm and a spring lever adapted to bias the transducer element into a state of strain so that a vibration of the diaphragm is transmitted to the transducer element. The transducer element is particularly suitable for use in a telephone microphone.