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| Number | Title | Issue Date |
| 4459501 | Toroidal generator and motor with radially extended magnetic poles An electromechanical device which can be used as a motor or as a generator has a housing, including bearing means to support a rotatable shaft. A pair of disc magnets are poled to have opposite polarity on the two faces of each. The magnets are mounted fa... | 07/10/1984 |
| 4410818 | Synchronous motor A synchronous motor includes a reduction gear train operatively connecting a rotor to an output shaft. A retaining member is rotatably mounted on and frictionally engages the first gear member of the reduction gear train for angular movement about the axi... | 10/18/1983 |
| 4373148 | Rotating electric machine having a toroidal wound motor winding A rotor rotating electric machine having a toroidal winding assembly wound n a toroidal helix configuration. The toroidal winding includes four coils, each of which is wound in the form of a toroidal helix around a thin cylindrical ring. A rotor, coaxially... | 02/08/1983 |
| 4321495 | Rotary pulse generator A vehicle transmission mounted pulse generator module having a through drive shaft for driving a conventional speedometer cable, a rotor permanent magnet driven by the shaft with predetermined angular freedom therebetween for magnetically indexing the rot... | 03/23/1982 |
| 4318018 | Rotary pulse generator A transmission mounted speedometer pulse generator module having a permanent magnet rotor and coaxial pickup coil assembly axially offset therefrom and together compactly mounted within a housing sleeve inserted within a transmission housing bore to be dr... | 03/02/1982 |
| 4274026 | Electric rotating machine A small electric motor including one or more field coils which cooperate with a long, thin cylindrical rotor having only a single pair of nonsalient rotor poles. A stator pole piece assembly is in magnetic flux relationship with the rotor and is provided ... | 06/16/1981 |
| 4274024 | Self-starting synchronous motor with defined direction of rotation Herein disclosed is a self-starting synchronous motor with a defined direction of rotation, a permanent magnetic rotor and a claw-pole type stator. The stator embraces an operating winding where several poles are combined to form main pole groups and to f... | 06/16/1981 |
| 4241270 | Synchronous electric motor A small two-phase motor having first and second field coils which each cooperate with a long, thin cylindrical rotor. The rotor is provided with only a single pair of nonsalient rotor poles and has a length to diameter ratio which advantageously is at lea... | 12/23/1980 |
| 4207483 | Step motor with circumferential stators on opposite sides of disc-like rotor An electric step motor has a rotor member and a stator member aligned on a common axis with one of the two members having two pairs of interdigital pole teeth extending perpendicularly to the axis. The two pairs of pole teeth are axially spaced from each ... | 06/10/1980 |
| 4162418 | Stepping motor for electronic clock A compact stepping motor for an electronic clock which features high stability in the direction of the motor rotation and small electric power consumption is provided with a rotor and a stator that surrounds the rotor and includes portions having a recess... | 07/24/1979 |
| 4141210 | Bipolar stepping motor A bipolar stepping motor includes, a single stator sheet, an air gap between the ends of the stator sheet, a rotor between the ends of the stator sheet, and a coil which encompasses a portion of the stator sheet. The stator sheet is of essentially annular... | 02/27/1979 |
| 4104552 | Synchronous motor structure A synchronous motor of improved construction characterized by a large diameter rotor mounted in axially juxtaposed parallel relation to the stator coil or coils, rather than within the interior of the stator coil or coils; the stator coil or coils being o... | 08/01/1978 |
| 4100443 | Electrical rotary machine An electrical rotary machine or motor having one rotor on which a plurality of stages of pole teeth corrresponding in number to the number of phases are formed, with magnetic flux being supplied thereto through individual annular exciting coils correspond... | 07/11/1978 |
| 4088910 | Geared motor assembly Synchronous motor has molded coil spool enclosed in telescoping metal field cups which have interdigitating teeth forming pole pieces around the central opening in the spool. A closed end of the spool has a bearing for one end of a shaft carrying a perman... | 05/09/1978 |
| 4087711 | Rotating electric machine having a toroidal-winding armature A rotating electric machine having an armature winding wound in the form of a toroid. The toroidal winding consists of a plurality of sectors which are wound in alternating sense and are disposed circumferentially around a rotor. The sectors are interconn... | 05/02/1978 |
| 4079279 | Electrical micromotor The invention relates to miniature electric motors, more particularly to monophase synchronous motors of the type the motor of which includes two pole pieces respectively polarized positively and negatively by the current circulating in an energizing coil... | 03/14/1978 |
| 4061936 | Synchronous motor A self-starting, high running torque, synchronous motor is disclosed. The motor has an annular stator and a cylindrical rotor mounted within and spaced from the inner cylindrical periphery of the stator. The rotor is provided with a plurality of evenly sp... | 12/06/1977 |
| 4059780 | Synchronous motor A synchronous motor comprises a rotor of permanently magnetized high coercivity material and a stator formed of two metal plates having projecting imbricated poles which are placed between an induction coil and the rotor. The air gaps between the ends of ... | 11/22/1977 |
| 4047061 | Coil protector for permanent magnet synchronous motor A permanent magnet synchronous motor includes a coil protector substantially covering a coil of wire and terminations on a bobbin. The coil protector electrically insulates the coil of wire from external structure of the motor and provides physical protec... | 09/06/1977 |
| 4034247 | Structure for synchronous motor, especially stepper motor The motor is comprised of two stators arranged coaxially. Each stator is formed of a first pole teeth plate and a second pole teeth plate interdigitated with each other. The first plates are arranged back-to-back and angularly offset relative to each othe... | 07/05/1977 |
| 4009406 | Synchronous micromotor with a permanent magnet rotor A synchronous micrometer wherein the rotor has a permanent magnet structure. This permanent magnet structure is surrounded by a cylindrical stator component of soft magnetic material formed with elongated axially extending cutouts which except for their o... | 02/22/1977 |
| 4004168 | Electric rotating machine A self-starting unidirectional electric motor in which a pair of auxiliary stator pole members are angularly spaced from the main stator poles and are provided with a magnetic return path having a reluctance which is less than the reluctance of the return... | 01/18/1977 |
| 3989967 | Pulse motor A pulse motor comprising a rotor having at least two magnetization axes extending parallel to a shaft of the rotor and angularly spaced apart at a uniform interval, the direction of magnetization of each magnetization axis being opposite to that of the ad... | 11/02/1976 |
| 3984709 | Miniature electric motor A miniature electric motor with a rotor having pole teeth simultaneously magnetizable in opposite polarities upon energization of an exciting coil, being provided with high magnetic reluctance grooves for magnetically separating each pole tooth from the a... | 10/05/1976 |
| 3978356 | Self-starting synchronous motor with permanent magnet rotor In the disclosed motor, completely or partially wound inwardly projecting stator poles form three or more pole pairs that surround a permanent magnet rotor. The stator poles per phase are grouped together into a single pole group with alternating north-so... | 08/31/1976 |
| 3975652 | No-back control for a permanent magnet rotor motor The invention provides a quiet, reliable and quick acting "no-back" action for synchronous motors utilizing permanent magnet rotors which have minimum power in self-starting and are prone to be erratic in direction of starting. This fallibility arises at ... | 08/17/1976 |
| 3940645 | Small-sized synchronous motor The synchronous motor, applicable to battery powered clocks is so designed that the north and south poles, formed on the peripheries of a pair of rotor discs, are bent so as to extend parallel to the arbor and to be staggered on the peripheral surface of ... | 02/24/1976 |
| 3936680 | Miniature self-starting electric motor A miniature self-starting electric motor includes a rotor shaft rotatably disposed in a casing. Two rotors fixed to said rotor shaft each have a circular body portion of soft magnetic material, said circular body portion having a periphery with pole teeth... | 02/03/1976 |
