Abstract: A direct current linear motor, particularly for use in data processing drive systems, is provided. The motor includes a plurality of permanent magnet poles disposed linearly adjacent each other, a ferromagnetic structure having a multi-strand winding formed of a plurality of coils, each strand forming a coil, the permanent magnet poles and the ferromagnetic structure being linearly moveable relative to each other. A flat air gap is defined between and separates the permanent magnet poles and the ferromatic structure. The ratio of the coil pitch of the ferromatic structure to the magnetic poles of the permanent magnet system is not greater than 1.

Abstract: The present invention provides a multi-purpose facsimile machine which functions as either a telecopier or a photocopier, at the selection of the user. The machine, when used as a telecopier, eliminates synchronization of transmitting and receiving units by storing transmitted data in a memory prior to printing. The facsimile machine includes a linear motor for driving both a print head and scan head on a single block. The linear motor includes at least one electrical coil driven along at least one lateral guide member formed from interspersed magnetic and non-magnetic materials. By selectively energizing the coil, the motor is advanced along its guide member by magnetic interactions. The electrostatic print head of the facsimile machine includes at least one thin conductive wire fused into at least one glass casing for providing a solid block structure for protecting and supporting the wire.

Abstract: An electric starter motor and generator is integrated into the structure of an internal combustion engine by making the ferromagnetic pistons of the engine the relatively moving elements in the starter and generator. A coil is solenoidally wound around each sleeve of the engine. An electronically controlled switch sends battery current into an appropriate coil inducing a powerful magnetic field therearound. The magnetic field and piston interact resulting in a powerful magnetic force which moves the piston and thus cranks the engine. At appropriate times in the operation of the engine, fuel to the same can be shut off and the engine run as a high speed electric motor.

Abstract: A linear motor having improved magnetic characteristics in driving a coil and in preventing flux leakage which is particularly useful with a magnetic disc memory. The motor includes a magnetic housing having top and bottom surfaces, side surfaces and one end surface with the end surface including integral first and second magnetic center pieces. An end plate mates with the magnetic housing with the end plate having integral first and second magnetic center pieces which mate with the first and second magnetic center pieces of the housing. First, second, and third magnets are mounted to the top and bottom surfaces and one side surface of the magnetic housing in cooperative relationship with the first center piece. Fourth, fifth, and sixth magnets are mounted to the top and bottom surfaces and the other side surface of the housing in cooperative relationship with the second magnetic center piece. A coil is coupled to the first and second magnetic center pieces and drives a carriage assembly.

Abstract: A linear force motor has an elongated body provided with an annular chamber therewithin. An armature is arranged within the chamber for axial movement relative thereto. Two axially-spaced permanent magnets, with their like poles arranged to face one another, are arranged within the body radially inwardly of the chamber, and are separated by a common polepiece. The force motor has four axially-spaced active air gaps, arranged in various reciprocal pairs and various parallel pairs. When the armature is shifted one direction relative to the body, the majority of each magnet's static flux passes through one parallel pair of air gaps. When the armature is shifted in the other direction relative to the body, the majority of each magnet static flux passes through the other parallel pair of air gaps. The motor has one or more coils operatively arranged to generate control flux in a path which passes through at least one reciprocal pair of air gaps.

Abstract: A cover gas recirculator in an acyclic generator having liquid metal collors for reducing entrainment of the liquid metal in the gas. Radial passages in the stator housing provide natural recirculating paths for the cover gas to flow radially outward along the sides of the rotor and return inwardly through the passages. Scoops or lips located inward of the liquid metal collector divert the outward gas flow into the passages to minimize contact of the gas with the liquid metal.

Abstract: In an alternating current synchronous servomotor, a disk-shaped rotor (20) is arranged between two stator halves having each a coil with leads extending in the radial direction. The rotor (20) comprises an even number of flat permanent magnets (57) forming an annular series around a hub (55) and of which the flat sides form the north and south poles (N,S) alternating in the series. The circonference of the hub (55) presents planar surfaces (55A) separated by edges (55B). A planar delimitation surface (57A) of one of the permanent magnets (57) bears on each of said peripheral surfaces (55A). A bandage (66) surrounding the delimitation surfaces (57B) of all the permanent magnets (57), which are radially directed to the outside, secures the latter to the hub (55) and connects them by means of the planar surfaces (55A, 57A), mechanically to the hub against rotation.

Abstract: Direct drive motor, particularly for disk storage drives, spindle drives and the like, with a rotor shaft rotatably mounted in a bearing support by two axially spaced bearings, whose outer rings are fixed with respect to the bearing support. The inner ring of one bearing is fixed to the rotor shaft and the inner ring of the other bearing is connected to the rotor shaft in friction fit manner, which prevents radial movements and permits a relative axial movement between the inner ring and rotor shaft.

Abstract: A rotor for a dynamoelectric machine is disclosed comprising a flywheel having a plurality of permanent magnets, distributed around the core and in the plane of the flywheel, which are aligned such that the N-poles are directed toward the outer perimeter of the flywheel. An even number of the magnets is provided, and the magnets are aligned so that the longitudinal axis of each magnet is at a 45.degree. angle to the diameter of the flywheel which includes the exact center of the magnet.

Abstract: In this electric motor and tachometric generator unit the generator comprises a rotor secured to the motor shaft and provided with a set of permanent magnets, and a fixed armature incorporating an armature winding. The commutation of the generator and motor windings is controlled by a coder via an electronic commutation circuit. The generator rotor is disc-shaped and the magnetic axes of the permanent magnets are parallel to the shaft. The movable portion of the coder is the generator rotor cooperating with a set of fixed magnetic sensors, preferably of the Hall type, mounted on one side of the generator rotor, the fixed armature being mounted on the other side of this rotor.

Abstract: A rotary solenoid includes a rotating shaft on which a rotor is fixedly mounted, a pair of stators arranged on both sides of the rotor and a driving coil disposed around the stators. The opposed arrangement of the pair of stators allows to rotate the rotating shaft at high speed. When the rotary solenoid is combined with a one-way clutch, there is provided an apparatus for converting an oscillating rotary motion into an incremental and intermittent rotary motion, which may be advantageously applied to a system for advancing an ink ribbon in a printer and the like.

Abstract: A pivotally oscillating motor having magnetizable armature pole elements arranged to cooperate with respective air gaps. Alternating current through a stator coil aids to the permanent magnet flux through one air gap while it reduces that in another air gap, so that alternately one or the other pole element is pivotally attracted into its respective air gap.

Abstract: A geared motor comprising: an output shaft rotatably received in a housing; a sun gear securely supported on the output shaft in the housing and having a plurality of external teeth; a ring gear housed in the housing and having a plurality of internal teeth meshed with the external teeth of the sun gear, and the internal teeth of the ring gear having a pitch circle larger than that of the external teeth of the sun gear and being larger in number than the external teeth of the sun gear; supporting means for supporting the ring gear in such manner that the center axis of the ring gear is eccentrically revolvable with respect to the axis of rotation of the output shaft and the ring gear is prevented from being rotated about its center axis; and drive means for generating electromagnetic forces one group of which has a plurality of force directions radially inwardly directed and the other group of which has a plurality of force directions radially outwardly directed, the different groups being circumferentially s

Abstract: The rotor of a stepping motor includes two axially spaced sections each formed with radially projecting and angularly spaced teeth. The angular width of the teeth of one section is approximately the same as the angular width of the pole pieces of the stator of the motor and, as a result, the motor possesses good dynamic torque, good damping characteristics and a high response speed. The angular width of the teeth of the other rotor section is greater than the angular width of the teeth of the first section so as to cause the rotor to stop in a stable detent position and to improve the stepping accuracy of the motor.

Abstract: A plurality of motors are arranged in a side-by-side array employing at least one common end cap or closure for the housings of the individual motors which are formed as to securely interfit with the respective housings and provide a base or reference frame member relative to which they are all supported. There may be a common end plate of this type at both ends of the array. The end plate also serves to provide bearing support for the shafts of the armatures and to provide support for gear coupling to a torque/speed conversion coupling member. Preferably, the end cap also provides support and a closure for gear means employed as well.The motors employed are advantageously of a type having flat generally parallel sides the dimension across whose sides is significantly smaller than the diameter of the housing containing the magnetic pole pieces. Such a configuration permits increased compactness if the flat sides are placed face to face in the array.

Abstract: A linear motor of the type having an elongated stator contained in a U-shaped channel includes a linearly moving element connected to its load by a connecting beam which passes out of the U-shaped channel. A flexible seal on each arm of the U-shaped channel seals against the sides of the beam where it passes out of the U-shaped channel and opposed elements of the seal abut each other to provide a barrier in other areas. In one embodiment of the invention, a positive pressure of a clean gas is maintained within the sealed U-shaped channel to prevent entry of atmospheric contaminants. In another embodiment of the invention, the seal in the vicinity of the beam is purposely made less than perfect so that the cooling gas is encouraged to flow toward, and exit in the vicinity of, the region where maximum cooling is required.

Abstract: A linear motor comprises a stator of a magnetic material, a movable element of a magnetic material movable along the stator and support means for supporting the movable element to hold a magnetic force of attraction to the stator. The movable element is arranged at a position displaced from the stator in a normal direction to a direction of movement of the movable means.

Abstract: An electromechanical transducer particularly useful as a linear alternator driven by a free-piston Stirling engine is disclosed. A relatively high permeability material is formed into a flux loop having at least two pairs of spaced gaps formed transversely through the loop. Each pair of gaps is aligned along a reciprocation path for a magnet which is mechanically mounted for reciprocation between alternate positions within the gaps of each pair. The magnets have a magnetization vector transverse to the reciprocation path and are drivingly linked to a mechanical energy input or output for operation respectively as an alternator or motor. The armature coil is wound around a portion of the flux loop.

Abstract: A linear pulse motor includes a stationary body having two ridges on both sides, the two ridges extending substantially in parallel with each other along the lengthwise direction of the stationary body; a movable body; at least two axles fixed to the movable body; rolling bearings supported on both end portions of the two axles respectively, one of the rolling bearings being fixed to one of the end portions of the respective axle at its inner race, and the other of the rolling bearings being slidably fitted to the other of the end portions of the respective axle at its inner race; and coil springs arranged between the movable body and the other of the rolling bearings so as to press outer races of the ones of the rolling bearings to one side surface of one of the two ridges and outer races of the others of the rolling bearings to one side surface of the other of the two ridges, the one side surface of the one of the two ridges being destined for regulating the movement of the movable body.

Abstract: A stepper motor housing an pole structure is disclosed in which a pair of identical stator plates, each having a plurality of poles, are positioned back to back with the poles projecting in opposite directions, the stator plates being positioned between a pair of substantially identical stator cups, each stator cup having a plurality of poles projecting inwardly from a back wall with a peripheral side wall terminating in an outwardly extending flange. A major surface of each flange is in contact with a face on one of the stator plates so as to assure a low reluctance magnetic path.