Abstract: An actuating device comprises a three-dimensionally movable member, a support member for supporting the movable member and an induction unit for imparting an induction force to at least one of the movable member and the support member to three-dimensionally move the movable member relative to the support member.

Abstract: To improve resistance to vibration and shock, while permitting ready access for replacement of brushes of an alternator, the remote end shield (8) is formed as a reinforced plastic injection-molded or pressure-cast structure, integral with a hub for the remote bearing of the rotor and the brush holder for the brushes engaging slip rings (10, 11) on the rotor shaft. An opening (33) extending from approximately the radially outermost part of the brush holder to the end of the remote bearing plate permits access to the brushes for maintenance or replacement. The surface region of the end plate is formed with an engagement surface (35) against which a voltage regulator can be attached, having a projecting terminal blade electrically connected with one of the brushes by a compression spring and/or an eyelet rivet and a pigtail attached thereto.

Abstract: A linear resolver wherein a stator is made of a magnetic material and is toothed at equal pitches along the direction of measurement, and a movable element is an electromagnet made of an E type or C type core around which a primary single phase winding W.sub..theta. is wound, the surface of the movable element facing the stator and constituting part of a magnetic path of the linear resolver being provided with detection secondary windings bonded to the surface, and the detection secondary windings each having as its winding pitch a half the pitch between the teeth of the stator; wherein the movable element is supported relative to the stator with a constant gap therebetween and guided in sliding relation to the stator only in the longitudinal direction of the stator.

Abstract: An electrical machine comprising a stator having electrical windings and a permanent-magnet rotor which carries a shaft arranged for connection to a prime mover. The machine, when the shaft is driven by a prime mover, acts as an alternator to produce alternating electrical current. A commutator is provided on the shaft and electrical-current-transferring brushes are associated with the commutator. Means is electrically associated with the segments of the commutator and with the electrical windings on the stator so that, whe the brushes are connected to a source of direct electrical current, the machine acts as a motor and the shaft is caused to rotate for starting a prime mover connected to the shaft.

Abstract: A controlled electric drive (CED) device comprises a pair of rectangular magnetic poles of different polarity arranged adjacent, parallel, and congruent to each other with a relatively narrow gap therebetween, providing an essentially uniform magnetic field between the pole faces. The device further comprises a driver conductor arranged to move freely between the magnetic pole faces in such a manner that an electric current running through the driver conductor will tend to move the conductor out of the magnetic field at right angles to the conductor and to the direction of the magnetic lines of force defining the magnetic field. The device further comprises a controller conductor wound in a flat, essentially rectangular spiral fixed adjacent to, and insulated from, the driver conductor. The controller conductor is so arranged that its longitudinal direction is parallel to the driver conductor, and has first and second portions, with direct current flowing in opposite directions in each of the portions.

Abstract: The stators of collectorless d.c. motors are securely connected with the bearing support member, and/or with the fastening flange. The printed circuit board with the electronic components for the commutation is arranged for space reasons in collectorless d.c. motors between the fastening flange and the stator. This type of construction makes impossible an exchange of, for example, defective components. According to this invention, a removable stator is proposed which is retained and secured by means of only a spring element.

Abstract: A wristwatch stepping motor comprises mounted on a support plate a rotor, an armature consisting of two portions each with a pole structure disposed at opposite sides of the rotor and a coil mounted on a coil core which is integral with one of the armature portions, the other armature portion being spaced from the coil core and being so mounted that its one end is in abutment with the free end of the coil core and the pole structures of both armature portions together with the rotor are arranged outside the area around the coil core, both armature portions being located by collars and sleeves projecting from the support plate to facilitate automatic assembly of the motor.

Abstract: A pair of resonant combustion chambers are interconnected by means of a narrow channel. Magnetic pole pieces are positioned in opposing relationship on opposite sides of the channel to establish a magnetic flux across said channel. Fuel is fed to the combustion chambers and ignited alternately by resonant detonation, first in one chamber and then the other to generate combustion gases to develop an ionized body of gas or plasma in the chambers. Shock waves are formed in the chambers with lumped constant resonant acoustic vibration of the plasma being established in each of the chambers. With the detonation in each chamber, the shock wave developed causes a cohesive mass or "slug" of gas to be propelled from the fired chamber through the interconnecting narrow channel surrounded by the pole pieces into the non-fired chamber.

Abstract: A drive device consists of at least two three-phase electric motors arranged paraxially alongside of each other, and each of the stators (6) thereof has its own winding (11). A single stack of laminations integrally serves each stator (6), in that each lamination is cut-out to serve plural stators. The winding (11) and the lay-out of stator-slots (7) and the supply-phase connection to each phase of the three-phase supply network is so selected for all motors that the magnetic-flux maxima of the same polarity in the yokes (9) of the stators (6), which maxima rotate in the direction of rotation of the motor, pass at different times through the location of minimum spacing between directly adjacent stators (6).

Abstract: An elastomeric compression element for an electromagnetic exciter unit which has a generally semi-circular outer periphery, an elongate inner periphery, end portions merging the inner and outer peripheries, a planar base surface and a contoured contact surface. The central portion of the element is dimensioned to have a height and thickness greater than that at the end portions for providing a non-linear spring action with the reciprocating free mass inside the unit during electromagnetic conduction.

Abstract: A corrosion-resistant electric motor casing comprises a substantially cylindrical yoke and barrel, and a pair of brackets fixed to and closing the axially opposite ends of the yoke and barrel. The yoke and barrel comprises a first member substantially in the form of a hollow cylinder made of a material which is sufficiently ferromagnetic to serve as a motor yoke, and a second member in the form of a pipe of aluminmum fitted over the first member and covering the outer peripheral surface thereof. The motor casing is made highly resistant to corrosion without involving an increase in the weight and cost thereof.

Abstract: The synchronous machine comprises a rotor provided with permanent magnets arranged for orthoradial magnetic induction and which are disposed around the axis in such a way that two adjacent magnets have counter-direction inductions, pole-pieces deviating the said induction so that it becomes radial to the periphery and each of the pole-pieces being formed of half-poles separated by a split pin applying each of the half-poles against the adjacent magnet, and wherein each magnet and each half-pole is in a single block in axial direction, the edges of the flanges ensuring the cohesion in radial direction.

Abstract: A motor-compressor unit comprises a motor including a magnetizable stator; an armature oscillatable about the motor shaft axis; two coils arranged opposite each other on the stator; and a magnetizable core extending between the coils. The stator has opposed sections spaced from each other and arranged to define air gaps between such stator sections and the core at the end faces of the coils remote from each other, such air gaps being concentric about the motor shaft axis. A permanent magnet is disposed between each stator section and the core, a pole of each magnet facing the core. A plurality of pole elements is associated with the armature and is arranged such that oscillation of the armature causes one pole element to move into its respective air gap and another pole element to move out of its respective air gap.

Abstract: An electromagnetic projectile launcher is provided with an insulating cartridge having an internal pressure chamber and an aperture for receiving a projectile assembly. A fuse element within the pressure chamber is electrically connected to a pair of generally parallel conductive launcher rails. Current flow through the fuse element causes it to explode and create a high pressure plasma within the pressure chamber. This high pressure plasma forces the projectile assembly to accelerate away from the cartridge and later serves as a means for conducting current between the conductive rails and for propelling the projectile assembly along the rails.

Abstract: An electric motor or generator has a rotor and a stator comprising a generally cylindrical yoke having poles secured to the interior thereof. The yoke is closed by end members secured thereto, said end members mounting bearings for the rotor. The yoke consists of a continuous spirally wound coil of metal strip. The convolutions of said coil are secured so that the coil forms a monolithic structural element which mechanically interconnects the end members, without the need for additional frames or ties.

Abstract: The invention relates to a brushless direct current motor system that includes an outer rotor receiving a load member such as a fan wheel having a plurality of blades. An axial extension of the rotor functions as a drive boss whose diameter is independent of the diameter of the motor stator core and is step-wise smaller in diameter at its outer closed end than at its inner opened end.

Abstract: A cryogenic refrigerator includes opposing pistons driven by linear electromagnetic machines. Magnetic elements on armatures reciprocate adjacent to first and second flux paths and a transfer of flux between the flux paths with movement of either armature causes the other armature to move in a balanced fashion in an opposite direction. The armatures are driven by coils which transfer the flux from one flux path to the other. Tapers in the flux paths cause the armatures to seek a centered position, or are tailored to minimize compressor input power.

Abstract: A linear stepper motor of the variable reluctance type including (a) a stator having a plurality of stator teeth formed with an equal pitch p along a longitudinal direction, (b) a slider having four slider poles, A pole, B pole, C pole, and D pole arranged in a longitudinal direction in that order, each of the slider poles being provided with a plurality of slider teeth formed oppositely to, and with identical pitch with, the stator teeth, and (c) four windings, A phase, B phase, C phase and D phase respectively wound about each of the slider poles independently. In this linear stepper motor, distances separating the B pole, C pole and D pole from the A pole are determined to be (L+2/4)p, (M+1/4)p and (N+3/4)p or (L+2/4)p, (M+3/4)p and (N+1/4)p, respectively wherein L, M and N are natural numbers.

Abstract: A moving element body apparatus of a linear motor is produced by punching and processing a magnetic soft iron sheet into a large number of pole pieces formed therein with a plurality of magnetic poles having a predetermined distance therebetween, building up in layers said pole pieces into at least two pole bodies, providing said pole bodies with wheel axles, and fitting said magnetic poles of said pole bodies into openings formed in a holder plate of a nonmagnetic material for receiving said magnetic poles, thereby interconnecting securely said pole bodies and fixing said wheel axles to the pole bodies.

Abstract: A magnetic probe for sensing the passage of a moving magnetic element, comprising a radially magnetized cylindrical permanent magnet, formed of a flat sheet of elastomer bonded ferrite material magnetized across its smallest dimension and curled to cylindrical configuration, or formed in cup-shaped configuration. A magnetic collector core is mounted co-axially in one end of the magnet cylinder and has an axial pole piece of reduced diameter projecting to the other end of the magnet cylinder, and an electrical sensor coil encompasses the pole piece; the sub-assembly comprising the magnet, the core, and the coil is mounted in a cylindrical magnetic housing, with only high-reluctance flux paths between the inner surface of the permanent magnet and the housing.