Abstract: A geared motor comprising an electric motor, a reduction gear having an input connected to a rotational shaft of the electric motor, an output shaft connected to an output stage gear of the reduction gear, which has a coupling member of resilient material attached thereto and a position sensor for detecting a rotational angle position of the output shaft, which has an input shaft connected to the output stage gear through the coupling member wherein the output stage gear has a protrusion imbedded in the coupling member so as to reinforce the coupling member and prevent it from being twisted whereby there occurs no difference between a rotational angle of the output shaft and that of the input shaft of the position sensor.

Abstract: A geared motor comprising an electric motor, a reduction gear having an input connected to a rotational shaft of the electric motor, an output shaft connected to an output stage gear of the reduction gear, which has a coupling member of resilient material attached thereto and a position sensor for detecting a rotational angle position of the output shaft, which has an input shaft connected to the output stage gear through the coupling member wherein the output stage gear has a protrusion imbedded in the coupling member so as to reinforce the coupling member and prevent it from being twisted whereby there occurs no difference between a rotational angle of the output shaft and that of the input shaft of the position sensor.

Abstract: In a moving coil type stereophonic pickup cartridge, an armature is provided having first, second, and third leg portions which extend in three directions. A source of magnetic flux is disposed with only one pole thereof adjacent to the first, second and third leg portions of the armature. The magnetic circuits thus constructed, having an open return path, generate signals by changes in the magnetic flux through coils wound on the second and third leg portions due to the movement of the armature relative to the magnetic source. Variations in the design of the three leg armature and the magnetic source are disclosed. Practical embodiments of the invention include disclosure of cartridge replacement features providing convenient electrical connection between moving coils and remainder of the sound reproduction system.

Abstract: A stereophonic pickup cartridge includes both a rod-shaped armature and a disk-shaped armature, both of which magnetically interact with the pole pieces of coils to improve the magnetic efficiency of the cartridge.