Abstract: In a low speed geared motor, a rotational magnetic field is formed in a stator against S-poles and N-poles in a permanent magnetic ring capable of being elliptically deformed. An external gear is rotated while internally meshing with an internal gear by means of rotation of the elliptical deformation caused in the permanent magnetic ring by the rotational magnetic field. As a result, the external gear is rotated on its axis by a difference between the number of teeth in the external gear and that in the internal gear for one rotation of the elliptical deformation. The rotational component is transmitted to an output shaft through a transmission means while absorbing the elliptically deformed component. With this construction, it is possible to enhance the energy conversion efficiency with a small size, to achieve a longer continuous operation, to almost eliminate backlash and hysteresis, to reduce the angular momentum, to improve.

Abstract: A laminated coil for motor having heat resistance and capable of voluminous production at a moderate cost, in which a conductive pattern 116 for coil is formed on a glass substrate 111, a glass coating 112 is applied on the conductive pattern 116 for oil, and further another conductive pattern 117 for coil is formed again on this glass coating 112. In a similar manner a glass coating 113, a conductive pattern 118 for coil, glass coating 114, and a conductive pattern 119 for coil are repetitively formed thereon, and finally a glass coating 115 is applied as a top coating, thereby making coils by thus laminating glass which have a high heat resistance and reliability for use under various environmental conditions. Furthermore, since, unlike a ceramic material, no baking as one body is required, there will never take place a disadvantage as the relation between the basing temperature of the ceramic and the melting point of the conductor for oil, thereby enabling enhancing the yield of coil production.

Abstract: In an internally meshing planetary gear structure with trochoidal tooth profile, the input shaft and the eccentric body are coupled so that radial displacement is possible and that the displacement between the eccentric body shaft and the input shaft is absorbed. In addition to this, positioning members or thrust bearings are used to suppress the axial movement or the inclination of the eccentric body or the external-toothed gears.

Abstract: A planetary speed changing device has an input shaft to which a torque is transmitted from an external device, an output shaft from which a torque of a reduced speed is output, eccentric members coupled to the input shaft through a flexible coupler which permits a relative radial displacement between the input shaft and the eccentric members, a plurality of externally toothed gears fitted on the eccentric members, an internally toothed gear having internal teeth formed by outer pins and meshing with the teeth of the externally toothed gears, inner pin receiving holes formed in the externally toothed gears, inner pins loosely received in the inner pin receiving holes, inner pin holder rings having holes tightly receiving the inner pins, and coupling means for coupling the inner pin holder rings to an output shaft.