Abstract: A gear-reduction device for measuring and transmitting the movements of a rotary object has a sequential arrangement of wheel/pinion pairs. Each wheel/pinion pair consists of a gear wheel and a pinion that are rigidly connected to a common gear axle. At least part of the gear wheels lie in different parallel planes that are inclined at an oblique angle in relation to the plane of rotation of the rotary object. The gear wheels are of equal diameter, and each of the pinions drives the next following gear wheel. The first wheel in the sequence of wheel/pinion pairs is driven by the rotary object, while the last of the pinions drives a swivel-mounted optical angle-measuring device.

Abstract: An angular position sensor unit has an encoder disc that is connected through a hub to an element whose angular position is to be measured. The encoder disc is made of a plastic material with a thickness between 0.1 and 1.0 mm and a planarity of <0.2 mm. An opening through the center of the encoder disc receives a flange of the hub. The flange has three or more ridges extending symmetrically in radial directions and engaging punched slots of the encoder disc. The slots conform to the contours of the ridges, so that the encoder disc is held in its position relative to the hub in a form-fitting, positive manner. In the axial direction, the disc is locked in place by the retainer.

Abstract: An apparatus and method for the multiple detection of optoelectronic signals, especially for detecting the positions of setting elements of flaps, slides, valves, etc. arranged in motor vehicles, to determine the steering angles for controlling driving dynamics, or to determine rotational angles or a linear movement converted into a rotational movement. At least two signal paths extend at an angle relative to one another, with one signal path extending substantially parallel to and under a clock disc and with the second signal path intersecting a sensor element perpendicularly through the clock disc. Signals in the first signal path are deflected by a reflector element underneath the clock disc in the direction towards the sensor element where the coincide with signals in the second signal path.

Abstract: A device responsive to angular rotation of an object, such as provided by a driving unit, to produce a geared-down pivotal measuring movement by including a reduction gear formed by a differential planetary gear mounted on a frame plate jointly with a rotatably supported angle diaphragm which enables the rotational angle and/or the number of rotations of the object to be measured to be indicated opto-electronically. The differential planetary gear has an input gear in the form of a change gear which engages the shaft rotation to be measured.

Abstract: A steering wheel angle sensor includes first and second sensors, a differential gear, and a detector. The first sensor determines steering wheel angular position within one revolution and the second sensor determines number of steering wheel revolutions. The first sensor has a first rotor carrying a first coding. The first rotor and the first coding rotate as the steering wheel rotates. The second sensor has a second rotor and a second coding movable by the second rotor. The gear includes driving, reference, and planetary wheels for coupling the rotors such that the rotors rotate at different speeds with respect to one another as the steering wheel rotates. The second rotor engages with a pivoted lever into an arm carrying the second coding such that the second coding pivots as the second rotor rotates. The detector scans the first coding within an angular segment of the steering wheel range of rotation as the first coding rotates.

Abstract: An angular position sensor unit has an encoder disc that is connected through a hub to an element whose angular position is to be measured. The encoder disc is made of a plastic material with a thickness between 0.1 and 1.0 mm and a planarity of <0.2 mm. An opening through the center of the encoder disc receives a flange of the hub. The flange has three or more ridges extending symmetrically in radial directions and engaging punched slots of the encoder disc. The slots conform to the contours of the ridges, so that the encoder disc is held in its position relative to the hub in a form-fitting, positive manner. In the axial direction, the disc is locked in place by the retainer.

Abstract: A gear-reduction device for measuring and transmitting the movements of a rotary object has a sequential arrangement of wheel/pinion pairs. Each wheel/pinion pair consists of a gear wheel and a pinion that are rigidly connected to a common gear axle. At least part of the gear wheels lie in different parallel planes that are inclined at an oblique angle in relation to the plane of rotation of the rotary object. The gear wheels are of equal diameter, and each of the pinions drives the next following gear wheel. The first wheel in the sequence of wheel/pinion pairs is driven by the rotary object, while the last of the pinions drives a swivel-mounted optical angle-measuring device.

Abstract: An encoder includes a casing having an open end and a base which fits in the open end. Trapezoidal cutouts in the casing are arranged to receive partly trapezoidal projections on the base. The casing contains an optical sensor, a circuit board for operation of the sensor, and a timing disc mounted on a rotary hub. The hub has a passage for a drive shaft of a motor, and the passage is in register with an opening in the base. During assembly, the drive shaft is passed through the opening in the base and the motor and casing are urged towards one another to push the base into the casing. When the base enters the casing, the projections are received in the cutouts and a guide surface in the casing engages a centering surface on the hub. Once the projections are in the cutouts, the casing and the base are rotated relative to each other to secure the base to the casing.

Abstract: Method and device for reproducing electronically-stored data onto one or more photosensitive layers. The stored data is emitted from a radiation source in the form of one or more parallel beams of electrical signal pulses which are reflected by a moving mirror surface onto the photosensitive layer(s). The invention comprises providing the moving mirror surface in the form of one or more helical walls or elevations present on the surface of a rotating cylinder.