Abstract: A linear pulse motor including: a stator; a movable member, the stator and the movable member each having a face to oppose to each other; a supporting mechanism for supporting the movable member, the supporting mechanism having a plurality of rolling members rotatably mounted thereon, said rolling members being placed between the stator and the movable member to be in rolling contact with the stator and the movable member so that a gap is formed between said opposing faces of the stator and the movable member to thereby enable the movable member to move parallel to the opposing face of the stator along a line of travel thereof, the supporting mechanism being movable on the stator along said line of travel; and a positive motion transferring mechanism for positively transferring movement of the movable member to the supporting mechanism so that the supporting mechanism is in displacement a half of the movable member, whereby the movable member is moved by generating a magnetic flux between said gap when the li

Abstract: The limited angle rotary force motor includes an inner pole member having multiple permanent magnets disposed on the exterior thereof and a longitudinal bore in which a rotor shaft is journaled for rotation. An annular low inertia coil assembly is positioned in spaced relation around the permanent magnets by sets of spoke-like arms extending from the rotor shaft through transverse openings in the inner pole means. An annular ferritic stainless steel outer pole sleeve is located in spaced relation around the coil assembly to complete the magnetic circuit and withstand hydraulic system pressure to which the motor components are exposed. The outer pole piece is part of the casing or housing for the servovalve.

Abstract: An electromagnetic machine of the type having a moving member and a stationary member, with a set of structures on the moving member to magnetically interact with a set of structures on the stationary member, has an improved construction comprising displacing by an angle of displacement, .alpha..sub.m, from their normal positions, a first portion of one set of structures whereby the displacement causes a harmonic of the fundamental torque/angle curve to be attenuated. The angle of displacement is determined by the following relationship:.alpha..sub.m =.alpha..sub.e /p,where.alpha..sub.e =displacement in electrical degrees,p=number of moving member magnetic pole pairs,further where .alpha..sub.e =180/h,where h=an integer equal to the number of a harmonic of the fundamental torque/angle curve to be attenuated.

Abstract: Liquid hydrogen is used to completely cool all elements of the generator including bearings, stator conductor, rotor conductor, magnetic flux shield, and excitation mechanisms. By essentially immersing the generator in liquid hydrogen, cryogenic interface problems are minimized. The conductor windings will utilize pure metals such as aluminum to minimize the weight and the ohmic heat loss in the machine. Complications of liquid helium cooling for superconducting windings and quench phenomena due to thermal instabilities in the superconductors are eliminated. The use of extremely low resistance of liquid hydrogen cooled aluminum permits heat removal in the confined space of the rotor field winding at magnetic field and current density that can exceed that of superconductors. Because iron is not required in the generator, very high voltages can be generated.

Abstract: An air pump for an aquarium includes a power source, first and second electromagnetic coils, and a circuit powered by the power source and coupled to the coils for energizing the coils in an alternating manner at a selected frequency, the circuit including an arrangement for varying the selected frequency. The air pump also includes a mechanical pump mechanism having two magnets which are each movably supported near a respective one of the coils and move in response to energization of the coils, and a pump arrangement which is responsive to movement of the magnets for effecting flow of a fluid.

Abstract: A microgeometric electric field machine includes arrays of conductors formed on or carried by a plurality of substrates. The conductors on a first group of substrates carry electrical charges, with alternate conductors being charged positively and the other conductors being charged negatively. A second group of substrates are interleaved with the first group in close proximity therewith. Also included is a voltage source for successively supplying alternate positive and negative electrical charges to the conductors of the second group of substrates. Effectively a pattern of alternate positively and negatively charged conductors is established for the second group of substrates and these patterns are caused to move, relative to the substrates, along the arrays of conductors to produce "moving" electric force fields which cause one group of substrates to move with respect to the other group.

Abstract: A linear driving mechanism of the present invention is disclosed in which a guide member is mounted to a frame, a guide axis is fixedly mounted to said frame and has a threaded portion thereon a rotor movably mounted to said guide axis along said threaded portion, a stator mounted to the outside of said rotor through a bearing means, a movable table which mounted to said stator and mounted to reciprocate along said guide member. According to the present invention, said movable table is linearly reciprocated along said guide member by rotating said rotor.

Abstract: A linear DC motor adapted for driving a positioning table having a frame and a table displaceable in a linear direction has a toothed assembly affixed to one element thereof and an array of permanent magnets facing the toothed assembly mounted on the other element. Coils wound around the teeth of the toothed assembly and appropriately energized by DC produce a linear force which is effective to displace the table in a desired direction. When used with a position sensor and an appropriate control system, the table is controllable to a desired position. A set of brush members depending from the table contact a developed linear slip ring track for energizing the coils and for switching polarity of voltage to the coils at appropriate locations. In an embodiment where the coils are stationary on the frame and the magnets are disposed on the table, a power pickup arrangement movable with the brush members is incorporated into the brush and developed slip ring apparatus.

Abstract: A three-phase stepping motor having first, second, and third sets of stator poles, with the first and second sets of stator poles having single coils thereon and the third set having dual or bifilar coils thereon. The coils on the first set of stator poles and one of the coils on each pole of the third set of stator poles are connected to one phase of a two-phase drive. The coils on the second set of stator poles and the other of the coils on each pole of the third set of stator poles are connected to the other phase of a two-phase drive. The currents of the two drive phases are thus magnetically combined in the third set of stator poles to produce energization of the "third phase". In one embodiment, a twelve-pole, rotary, three-phase stepping motor with a 50-tooth rotor and a 48- , 50-, or 52-tooth-pitch stator produces a step angle of 1.8.degree. mechanical with a two-phase drive.

Abstract: Motion generating apparatus comprising:(a) first and second structures which are relatively rotatable,(b) magnetic material associated with one of said structures and characterized as having a first magnetic state at a high temperature and a second magnetic state at a low temperature,(c) a magnet associated with the other of said structures and having a pole to produce flux that intercepts said material as said structures relatively rotate,(d) first means to transfer heat to cause said material to vary in temperature between said high and low temperatures so that magnetic force is exerted on the rotating structure as said material relatively passes in proximity to said magnet, thereby producing torque casing the rotating structures to rotate, and(e) other means to transfer heat from the magnetic material to fluid media.

Abstract: A vibration generator (50) is disclosed for generating vibration energy. A magnetically attractable mass (98) is loosely disposed within a substantially cylindrical cavity of a housing (54). An array of electromagnets (60-90) are circumferentially spaced around the housing cavity. The electromagnets (60-90) are sequentially energized in a predetermined sequence to magnetically attract the loosely disposed mass (98) toward an energized electromagnet thereby causing the magnetically attractable mass (98) to orbit around the array of electromagnets imparting centrifugal force to housing (54) which in turn generates vibration energy.

Abstract: Iron surfaces of stator poles, rotor periphery, or both stator poles and rotor periphery, of stepping motors are manufactured without teeth. The stepping effects of teeth are obtained by bonding, to the toothless surfaces, webs composed of fluted magnetic material having alternate thin and thick sections magnetized in the direction of the thickness of the material and carrying soft magnetic inserts in the flutes. The inserts form virtual teeth. The thick sections are magnetized in the direction opposite to the thin section and the flutes extend in the direction transverse to the direction of relative motion between rotor and stator.

Abstract: This invention provides a structure for damping longitudinal vibrations in an apparatus which moves longitudinally.It employs, in a longitudinally moveable body, a structural element, slotted in the longitudinal direction, so that said structural element has relatively rigid upper and lower portions and relatively flexible flextures at the slot ends. A layer of elastomeric material covers a side of said element and a stiffening plate covers said elastomeric layer.

Abstract: An apparatus comprising a rocker with a curved base, and an activating base supporting and continuously activating the rocker. Two magnets, whose north poles point in opposite directions, one upward and the other downward, are respectively disposed on either side, towards which rocker rocks, of the center of gravity of the curved base. A first induction coil is set within the activating base and under the rocker so as to produce induced a current when the rocker is rocking in the direction of one of the two magnets. An operational amplifier integrated circuit (OP AMP IC) is provided within the activating base so as to amplify the induced current. A second induction coil, which is connected to the output of the OP AMP IC, is provided so as to induce a magnetic field. This magnetic field applies an attractive force on the magnet when it moves closer to the activating base, and a repelling force on the other magnet moving away from the activating base so as to activate the rocking means.

Abstract: A permanent magnet type electric motor including a cylindrical yoke, a plurality of magnetic poles arranged peripherally on an inner surface of the yoke and an armature arranged rotatably in a region surrounded by the magnetic poles is featured by the magnetic poles each composed of a rare earth metal containing magnet, a ferrite magnet and an auxiliary magnetic pole of a high permeability material all of which are juxtaposed in the order and satisfy axial length relations of (ferrite magnet)>(auxiliary pole).gtoreq.(rare earth metal containing magnet) and (ferrite magnet)>(armature core).

Abstract: A rotary machine such as a motor or generator is disclosed wherein the rotor has three magnetic components. One of the components also acts as a rotor frame. The rotor frame has a group of wedge-shaped openings which are evenly spaced and peripheral to the frame. Another magnetic component, permanently magnetized and hollow on its inside, is also wedge-shaped and is inserted in each first mentioned wedge-shaped opening of the frame. A third magnetic component, conforming to the hollow inside surface of the permanent magnet is buried within and thereby surrounded by each such hollowed magnet. Such third magnetic component is solid throughout its entire cross-section. The wedge-shaped structures of the rotor provide the required magnetic polarities and field for coacting with the fields provided by the stator.

Abstract: A magnet assembly having means for reducing release of magnet material particles from the magnet element includes a body of permanently magnetizable material and a shell at least partially surrounding the body. The shell is disposed and located so as to reduce release of particles shed from the surface portion of the body which is surrounded by the shell, and is preferably attached to the body by an adhesive which bonds the adjacent surfaces of the shell and the body together. A plurality of such magnet assemblies may be fastened to a flux ring in order to provide a rotatable assembly for a dynamoelectric machine in which migration of magnet material particles into the stator-rotor air gap is reduced. In accordance with a preferred embodiment, the magnet assemblies of the present invention are employed in a molded rotor assembly for such a machine.

Abstract: Stepping motor including a runner (2) and at least one stator (4) relative to which the runner is movably mounted. The stator has at least two mutually parallel magnetizing elements (6,8,10) each with a groove-like space (19) extending in the travelling direction of the runner, pole tooth rows (12) being formed on the inside of the defining side walls of said space. The runner (2) carries an armature element (18) in each groove-like space with tooth rows (20) arranged along the pole tooth rows (12) of the magnetizing element such as to close magnetic flux paths in coaction with the armature element tooth rows, said paths extending via said side walls transverse the travelling direction of the runner (2). The parallel armature elements (18) are carried by a common carrying body (16) of non-magnetic material.

Abstract: Disclosed is a power supply apparatus for a linear motor transportation system having a number of discrete linear motor units serially arranged along a track to generate a moving magnetic field for driving vehicle.

Abstract: A stator for a stepping motor of an electric watch comprises an elongated yoke member having a free end, a coil arm integrally formed on the other end of the yoke member and having a free end, an exciter coil arranged on the coil arm by being pushed onto this coil arm from the free end thereof, and a bridge member connecting the free ends of the yoke member and the coil arm, the yoke member with the coil arm and the bridge member hereby being flat elements made of a magnetizable sheet metal. In accordance with the invention, the coil arm is of a greater length then the exciter coil and the bridge member rests flat on the free ends of the yoke member and the coil arm and areally overlaps regions of these elements.