Abstract: An air-core meter having a two-piece bobbin enclosing and surrounding a moveable magnet within a sealed cavity containing a damping fluid. The magnet is rotated about the axis of a supporting shaft by a plurality of orthogonally related windings disposed about the outer surface of the bobbin. The air-core meter provides improved and simplified assembly, improved reliability and reduced damage in routine operation and service through novel bearing design and bobbin structure. Furthermore, improved meter performance is provided by specific winding geometries and magnetic structure design.

Abstract: A pointer for use with an analog meter movement providing a luminous indication of the meter position. The present invention provides an analog meter movement indicator which selectively directs a laser light or other collimated beam across the contoured face or dial or an analog meter, wherein the selective movement of the light beam and the resulting luminous image is provided by a selective movement of an optical deflector mounted on the shaft of the meter movement. The optical deflector is optically energized by an externally mounted, stationary light source. As the meter movement shaft is rotated, the luminous beam image moves over the dial face according to the signal applied to the meter movement. The resulting instrument provides a dramatic indication of analog meter signal presentation.

Abstract: An air core meter movement having return-to-zero means. Permanent magnets mounted within the deflection coils provide a field which interacts with the rotor magnet to return the pointer to zero when no power is applied to the meter. A compensating coil is also included to counteract the effects of the permanent magnets when measurable signals are applied to the deflection coils.

Abstract: The present invention describes an adjustable speedometer/odometer to accommodate various vehicle drive configurations such as a variety of vehicle tire size and rear axle ratios. The range adjustment is made at the factory or by service personnel, and is implemented by a plurality of switches, insuring a positive selection of the desired range value, thereby eliminating the need for calibration. The conventional mechanical speedometer/odometer and speedometer cable are replaced by a signal transducer mounted on the transmission, and an electronic speedometer unit. The transducer sends signal pulses to the electronic speedometer unit that displays the vehicle speed and distance travelled, by a moving-magnet meter and an incremental counter, respectively. In addition, the range of the speedometer/odometer is switched to accommodate a dual-axle ratio differential according to a signal from an axle mounted switch.

Abstract: An air core meter movement having return-to-zero means. Permanent magnets mounted within the deflection coils provide a field which interacts with the rotor magnet to return the pointer to zero when no power is applied to the meter. A compensating coil is also included to counteract the effects of the permanent magnets when measurable signals are applied to the deflection coils.