Abstract: An electromagnetically controlled spring clutch mechanism comprising an input rotating element, a rotor, an armature, a biasing spring for biasing the armature in a direction away from the rotor, an electromagnetic driver for magnetically attracting the armature to the rotor against the biasing action of the biasing spring, and a coil spring. The clutch mechanism transmits the driving force of the input rotating element by the contraction of the coil spring. According to a first aspect, the biasing spring is fixed to a supporting member by a plate-like spring fixing member to form a unit assembly. According to a second aspect, the clutch mechanism can be used in any one of two arrangements by changing the assembling sequence of various constituent elements. According to a third aspect, projections which contact or approach the rotor beyond the armature are provided in the supporting member, to which one end of the coil spring is connected.

Abstract: An system for the supply of fuel which acts as an electrolyte, including a metallic component part as a sacrificial anode for protection of metallic current leads against electrolytic corrosion. The component part is connected to the positive side of the operating circuit of the electric motor. In order to improve the protection of the current leads, the sacrificial anode is connected to a higher electric potential than the current lead for the positive side of the circuit.

Abstract: A motor brush assembly comprises a stamped and formed lead frame including electrical terminals at spaced locations and a dielectric housing member secured onto the lead frame with the electrical terminals being exposed and accessible for electrical termination to electrical power wires and lead wires of capacitors and inductors. Cavities are located in the housing member in which the inductors are disposed. Metal brush holders are positioned in brush holder locations on the housing member and lugs thereof are electrically stapled onto the lead frame. Openings are located in the housing member exposing severable sections of the lead frame separating the lead frame into separate brush circuits. If inductors are to be disposed in the circuit path between the terminated power leads and the brush holder locations, the respective severable sections are also severed which interconnect the lead frame between the associated pairs of terminals corresponding to each inductor.

Abstract: A brushless dynamoelectric machine with a molded insulating control wheel having a rim on whose inner surface the rectifiers and other components of the starting control circuitry are directly mounted. Proximate the central hub of the control wheel is mounted a resistor wheel of metal having axial apertures in which are located cartridge heater-type resistors that are interconnected to provide the starting resistor of the control circuitry. The resistor wheel has external fins that aid in dissipating heat from the resistors and also blow air onto the components mounted on the wheel rim.

Abstract: The motor comprises a flexible circuit composed of a substrate disposed in an air gap between the stator and the rotor, bearing a coating of copper etched to produce the various circuit components. Conductive paths carry the current to brushes soldered on zones of the circuit. Another path leads to further zones constituting shorted turns interconnected by striated areas constituting resistor elements.

Abstract: A tachogenerator has a magnetoresistance film coil formed on a stator surface along a circular path concentric with a rotor axis. The coil has a spatially periodic structure, with multiple spaced-apart lateral components series connected with longitudinal components. The stator surface is opposite to a rotor surface having multiple equiangularly spaced magnetic pole faces with alternately opposite polarities. Current passed through the coil develops voltage variations. Undesirable small voltage variations resulting from manufacturing tolerances are averaged to zero at the coil output terminals.

Abstract: An electrical motor has one or more capacitors inside the motor. Particularly, a half-pitch capacitor induction motor is shown, wherein the stator winding has a plurality of coils, one each on a tooth of the stator, and an auxiliary or capacitor winding includes a plurality of coils, one each on different ones of the teeth of the stator. The stator coils are spaced around the periphery of the stator such that spaces are provided between the coils, and one or more capacitors are provided in such spaces. These capacitors are mounted on an insulator board which provides physical mounting of the capacitors and also provides electrical connection to the capacitors to connect them all in parallel. The capacitors are then connected to the auxiliary winding. By this means, a small-sized motor without an elongated end bell permits mounting the capacitors inside the motor frame instead of outside in the usual cylindrical metal container.

Abstract: A hammer brush holder assembly can be easily fabricated and assembled by robot automation using only a few simple steps. The brush holder has at least two brush support arms swivel-mounted at one end in a brush rocker and pressed against a commutator by a tension spring via the brushes which are held at the other end of the brush rocker. The brush support arms with sleeve-shaped ends can be slipped axially onto lugs molded in an axial fashion to the brush rocker and locked in place. Both brush support arms are connected as parts of a single-piece plastic injection-molded component with an integral breakaway bridge segment which holds both brush support arms to a preselected mutual spacing. The breakaway bridge segment can be eliminated after installation of the hammer brush support assembly in the commutator motor.

Abstract: The stator of the tacho-generator is assembled of a pack of sheet steel lamellae defining an annular yoke portion and inwardly projecting poles for stator windings. The yoke portions of the pack are formed with an axially directed cutout for accommodating circuit elements of the tacho-generator.

Abstract: An actual speed value converter for a motor comprises a tachometer having a part rotating with the speed to be measured, e.g., a capacitive or inductive rotor, or an optical actuator disk, the tachometer determining the frequency of a frequency generator. The frequency generator is part of an action path for preparing the actual speed value, the action path comprising a frequency generator and a downstream-connected frequency discriminator.

Abstract: A rotary rectifier assembly including a shaft adapted to be rotated. Three equally angularly spaced phase conductors are disposed about the shaft and insulated with respect to each other and with respect to the shaft and each has opposed, axially opening recesses. Diode wafers are received in each of the recesses and each recess further receives an electrically conductive load shoe. A pair of end conductors sandwich the phase conductors, wafers and load shoes and each end conductor has three equally angularly spaced curved recesses for matingly receiving the curved portion of the corresponding ones of the load shoes. A single biasing device is employed to bias one end conductor towards the other to thereby establish good electrical contact between the various components while occupying a minimum of space and minimizing the overall weight of the assembly.

Abstract: A squirrel-cage induction motor comprises a stator having a stator core and stator windings divided into first and second coils with different numbers of poles, and a squirrel-cage rotor including a rotor core and a plurality of rotor conductors embedded in the vicinity of the surface of the core. The number of the rotor conductors is the same as the average number of poles of the first and second stator coils, which conductors are arranged equidistantly along the periphery. This induction motor, with the construction of a squirrel-cage rotor, permits a variable speed operation without using any special device.

Abstract: A brush mount on electric motors equipped with a radio-interference suppression choke (24), particularly for household appliances such as vacuum cleaners or the like, having a support part (7) of non-conductive material which is fastened in the motor frame (1) and into which a guide sleeve (13) of conductive material for the carbon brush (15) with its tensioning spring (17) is inserted by form lock in axially non-displaceable manner between two side walls (9, 10) extending from a web (8), the rear end of the guide sleeve (13) having a connection lug (50) for the conductor of the carbon brush (15).

Abstract: A rectifier has a pair of heat dissipating plates at the positive (+) side and the negative (-) side which constitute a full-wave rectification circuit and are positioned in mutual confrontation with a small gap between them, and an insulating material to electrically insulate the both heat dissipating plates. A recessed portion is formed in each of the mutually opposed parts of the both heat dissipating plates; a noise-preventing capacitor element is housed in a closed space defined by the recessed portions to make an outer covering for the capacitor, and the capacitor element and each of the heat dissipating plates are electrically connected.

Abstract: A cooled resistor pack for a dynamoelectric machine wherein cooling water is passed through ducts in a conductive block and plurality of connectors are mechanically attached to the conductive block but electrically insulated therefrom and nichrome wires of varying length and varying in number electrically join the connectors to the conductive block and individually insulated brush segments, which have individual strands and the brush segments are connected to separate connectors in such a manner that the resistance between the brush segments and the block decreases from the trailing end segments to the leading end segments of the brush.

Abstract: Apparatus for the contactless and brushless transmission of measuring and control signals by generators with rotating rectifier or thyristor excitation, including a shaft having an outer surface, a driving collar integral with the shaft, a shrouding ring lying at ground potential being integral with the driving collar and rotationally fixed relative to the shaft, the shrouding ring having a given axial range and an outer surface, a first and a second inductive signal transmission apparatus each including respective stationary and rotating parts, the second signal transmission apparatus being disposed concentrically within the first signal transmission apparatus in the given axial range of the shrouding ring, the rotating part of the first signal transmission apparatus being disposed on the outer surface of the shrouding ring, and the rotating part of the second signal transmission apparatus being disposed on the outer surface of the shaft.

Abstract: A mold type motor comprises a molded resin frame covering the surfaces of a stator iron core and a coil end and molded resin brackets detachably fitted on the end openings of the molded resin frame wherein a surge absorber unit is embedded in the molded resin frame and is electrically connected to a grounding element.

Abstract: A coupling unit for connection of a generator high-voltage winding lead-out and a cable comprises a casing (1) wherein a generator high-voltage winding lead-out (5) with sheaths (6) and a cable termination (3) are arranged, their current carrying elements (8) being linked by a power jumper (9).

Abstract: A vehicle generator is provided with a noise reduction apparatus in the form of an inductor coil wound about a plate connecting an output capacitor to an output terminal.

Abstract: A commutator motor having a radio noise preventing device, where a common ground terminal of radio noise preventing capacitors is connected to a stator core. The stator core has two opposed arcuately faced poles around which field windings are respectively wound. A pair of non-magnetic metal pieces are provided between the poles in opposing relation, so that they surround an armature with the poles.

Abstract: A brush board assembly for a dynamoelectric machine is provided with flexible electrically conductive brush carrying flat springs which are pinned to a ring-like mounting board in a manner effective to electrically connect the spring to printed circuitry on the board.

Abstract: The fan comprises a fan housing surrounding a fan wheel which is coaxial with the fan's drive motor. The drive motor is a permanent-capacitor induction motor with squirrel-cage rotor, the stator of which includes a main winding and an auxiliary winding, the former energized directly from a one-phase A.C. power source, the latter energized through the intermediary of a capacitor, the capacitor serving to produce a second or auxiliary phase of energization for the sake of a rotating stator field. In order that the capacitor not consume valuable space within the fan, especially in the case of a small fan, the capacitor is a wound capacitor of generally annular overall configuration, mounted coaxial with the drive motor radially outward of the drive motor.

Abstract: A brush board for a dynamoelectric machine is formed with resilient arms which are an integral part of the board and have commutator engageable brushes affixed at the free ends thereof. The board carries printed circuitry which extends to the free end of the arms and connects with the brushes.

Abstract: A radio-frequency interference suppressing system for inside a permanent magnet field motor case includes a pair of commutator brushes, a pair of power input terminals electrically connected with the brushes, a capacitor electrically connected across the terminals, a pair of capacitors each electrically connected to a different one of the two terminals, and a grounding member electrically connected with the pair of capacitors for engaging the inside of the motor case.

Abstract: A brush holder assembly is designed so as to be prefabricated in automatic assembly machines. All the components of the assembly are located on a single side of an insulated carrier plate. The components are connected together by means of electrically conductive grommets which are fixed in the carrier plate. A vibration-resistant holder assembly is thus formed which can be assembled with less cost than other such assemblies which require hand labor.

Abstract: Two spaced capacitors are connected in parallel across each supply lead of a brush-commutator type electric motor and the motor frame to provide a PI filter for each brush in which the length of brush lead between the capacitors comprises the inductor element of the filter. To facilitate this arrangement, one of the capacitors for each brush is mounted upon one side of an annular support member of an insulating material and an electrically conductive plate arranged to electrically engage the motor frame upon assembly is mounted upon the other side with electrical connections extending through the support member to interconnect one terminal end of each of the capacitors to the conductive plate and to secure the conductive plate to the support member.

Abstract: The permanent magnet fields encircling the armature of a direct current motor are encircled by a pair of radially spaced cylindrical metal members separated by a cylindrical dielectric member. One of the metal members and one of the brushes that engages the commutator of the motor are grounded. The other brush and the other cylindrical metal member are connected to a direct current power supply, whereby a capacitor is formed by the three cylindrical members for suppressing radio frequency noise generated by sparking of the brushes at the commutator.

Abstract: A discharge resistor adapted to be mounted on a rotatable shaft of a dynamo-electric device comprises a pair of spirally wound, insulated resistor elements and means for supporting these elements approximately coaxially with the shaft. Each of the resistor elements is spirally wound in a flatwise manner with a bore having an effective diameter greater than that of the shaft, and insulation layers are provided between adjacent turns thereof. The resistor elements are arranged and connected electrically in series such that the inductive impedance appearing across the respective resistor elements effectively cancel each other.

Abstract: A portable electric motor-driven tool including an electric motor and an electrical control system for controlling the speed of the motor. The control system includes an electric switch for controlling the flow of electrical current to the motor and a composite thyristor and heat sink assembly, with electrical current conducting wires connecting the switch with the assembly. The motor has a fan providing an air stream for cooling the motor. The motor housing has a cavity disposed in the airstream and is configured to receive the thyristor and heat sink assembly and its electrical current conducting wires in quickly detachable relation therein. The heat sink includes an elongated base having laterally extending heat dispersing vanes of various sizes with each vane having a wing portion extending laterally from the vane for added heat dispersement.

Abstract: A rotating starting resistance for a rotating electrical machine is disclosed. The resistance includes a helicoidal resistance wire that is wound in the shape of a torus, and connected to the rotating shaft of the electrical machine. The resistance wire may be directly fastened to a supporting member by means of a glass fiber cord suitably impregnated with a synthetic resin. The helicoidal nature of the starting resistance permits efficient cooling, and allows minimization of the overall height of the resistance. The resistance wire, which is wound in the shape of a helicoidal torus, may be reinforced at either the inner or outer diameter of the torus.

Abstract: An alternating current generator for charging a battery has a radio noise suppressing capacitor. One terminal of the capacitor element is press-contacted with the bottom of a hollow part formed in a bracket and the other terminal of the capacitor element is press-contacted with a conductive member connected to the output terminal of the generator in the holding of the capacitor. The parts can be decreased and the quality can be improved.

Abstract: A flux sensor is provided for measuring magnetic flux in laminated cores, and especially for measuring the axial flux in the end regions of the stator cores of large generators. The sensor comprises a flat, multi-turn coil of fine wire enclosed in an insulating enclosure which includes a pressure-supporting member of greater thickness than the coil. The sensor is thin enough to be placed between the laminations of a generator core and the high clamping pressure is carried by the pressure-supporting member which protects the coil. The leads are flat conductors brought out between the laminations to the periphery of the core. Such a sensor can remain permanently embedded in the core since it does not effect the core structure.

Abstract: A permanent split capacitor induction motor rated at 460 volts AC is provided with first and second main winding parts and an auxiliary winding. The motor includes a core of magnetic material having a plurality of winding receiving slots formed in it. The main and auxiliary windings are constructed from a plurality of wire turns arranged in coil sets. The auxiliary winding is placed adjacent the first main winding part in the core slots, and is electrically connected to it. The coil sets of the auxiliary winding are separated from the coil sets defining the second main winding part by the coil sets of the first main winding part. Individual wire turns are distributed in the slots of the motor and positioned so that the voltage between coil sets forming the main winding parts and the auxiliary winding can never exceed the voltage across the capacitor.

Abstract: An electrical machine operating at radio frequencies, which comprises a stator S and a rotor R displacing in relation to the latter, for example in a rotational motion. The rotor comprises oscillatory circuits at the rate of one per pole. In a variant embodiment, the stator is designed as a low-pass filter made up of inductors in series between two conductors, capacitors and a common conductor. Commencing from a certain rotational speed on the part of the rotor which is driven by a motor, power amplification takes place between the input and the output of the filter.

Abstract: An electric machine with a laminated stator or rotor core made of magnetic amorphous metal ribbon takes advantage of the increased lamination area due to the inherent thinness of the material to utilize the laminations as the plates of a capacitor for starting, running, and/or power factor correction. Two amorphous metal ribbons with alternate insulating layers are wound two-in-hand either helically or spirally to fabricate the cores and more than one amorphous metal core, can be provided and connected as additional capacitors. The preferred embodiment is a single phase permanent split-capacitor motor with integral capacitor.

Abstract: Motor-fan unit, particularly for the cooling of the circulation water of an automobile vehicle motor, comprising a helicoid fan driven by an electric motor. A centrifugal interior blading draws in the air through the electric motor to cool it and drives this air back into a volute surrounding the axis of the motor-fan unit. The volute opens at the same side as the electric motor in relation to the vanes of the helicoid fan. An electrical resistor, usable for making the motor-fan unit turn at reduced speed, can be placed in the volute or at the outlet of the volute to be cooled by the air stream.

Abstract: The invention relates to an electrical machine. The stator 1 is a delay line, in the form of a low-pass filter in the example, formed by inductance 11 and capacitors 12 connected between these inductances and the common conductor 13. The rotor 2 comprises dissipating elements 22 incorporated in circuits 26, separate in the example, and having a common point 25. It is put in movement by a motor. The machine operates as a high-gain amplifier having a wide band of high-frequency signals applied to the input 14 of the stator, separated from the output 15 by the decoupling zone 30. High powers are obtainable.Application to installations for testing vibration of industrial equipment and to high-power longwave radio transmission.

Abstract: A three pole electric motor has three poles spaced from the armature of the motor by an air gap and extending around the air gap, each pole being formed with a column, the three columns being parallel and connected at their ends remote from the armature. A first coil is wound upon one of the outer columns and is connected to a single-phase alternating current source while a second coil is wound upon the other outer column and is tapped across a portion of the first coil in series with a condenser.

Abstract: The invention is directed to a circuit arrangement and a suppressor-insulator member for suppressing noise in a portable hand-held electric-powered tool such as a double-insulated tool or the like while at the same time providing electrical insulation between voltage-carrying portion within the tool and an exposed part of the tool accessible to the operator of the tool. The suppressor-insulator member for conducting high-frequency noise from the voltage-carrying portion within the tool to the exposed metal part includes two connecting plates connectable to the voltage-carrying portion and the exposed-metal part respectively; and, a plate-like element of insulating material sandwiched between the connecting plates.

Abstract: Resistors disposed for vaporizing vapor-trap liquid coolant are individually connected in series with each of the high-aspect-ratio current leads connected to a superconductive coil of an intermittently operable electromagnetic machine. The portion of each lead extending from a coolant vapor return duct (through which the leads enter the machine) and terminating within the coil chamber is of hollow structure. The terminal length of each such portion is turned radially outward and its open outer end is submerged in the pool of liquid coolant in the chamber. The vapor traps are individually defined by liquid coolant in the hollow terminal length of each lead. Coolant vaporized in each trap flows in lead-cooling relationship with the corresponding hollow lead portion.

Abstract: In a rotary electrical machine, in order to achieve an amplification effect with a high output level, the windings of a series of stators, aligned in front of a series of rotors, assembled upon one and the same axle, are connected to a common (earth) conductor across capacitors. In this fashion a filter made up of .pi.-cells is obtained, whose amplification factor vis-a-vis a signal injected at the input of the machine, between earth and a terminal, is given by: ##EQU1## THIS FOR A MACHINE COMPRISING N rotors and N stators between said input and output, at which the amplified signal is picked off. L.sub.s designates the self-inductance of a stator, C the capacitance of the capacitors, and R the negative resistance which appears in operation within the winding of said stator.

Abstract: Measurement of the current flowing in the rotor of an electrical machine and especially an a.c. exciter with external poles for excitation of a synchronous machine by way of a rectifier mounted on the rotor is accomplished without the use of sliprings by means of at least one pair of contra-wound coils extending in the axial direction of the rotor, the coils being connected in series and mounted in a slotted support of insulation material secured to the underface of a pole shoe in the gap between shoe and a toothed rotor. A voltage proportional to the rotor current is induced in the pair of coils by the stray flux generated by the current carrying conductors in the rotor slots. The width of each coil approximates the width of one tooth on the rotor and the spacing between the axes of the coils approximates the size of the rotor slot pitch.

Abstract: A superconductive field winding is provided for the rotor of a dynamoelectric machine. The winding consists of a number of multi-turn coils of a superconductive conductor which are wound about the periphery of the rotor thereby defining at least one pole pair. Selected coils of each pole pair are series-connected in groups of two coils or more and all of the series connected coil groups are connected in parallel one to another. Resistance elements connected in series with the parallel connected coils cause the current density of coil conductors disposed in regions of high field intensity to be reduced in relation to the current density of conductors lying in regions of low field intensity, thereby allowing the use of higher source current. A net increase in the useful external magnetic field is therefore obtained for a given amount of superconductive material.

Abstract: A motor is disclosed that is particularly adapted for energization from a single phase power source and that includes a magnetic core having uniformly sized and spaced slots as well as three different winding phases. In one illustrated form, the motor winding circuit includes sub-circuits in the form of a primary phase winding, an intermediate phase winding, and a capacitor phase winding with the different winding phases positioned on the core so that the space angle between the effective centers of poles (or coil groups) of next adjacently located winding phases is sixty electrical degrees. Also disclosed are procedures by which an initial ratio of effective conductors (or turns) in the capacitor phase to effective conductors in the main phase can be calculated as well as an initial ratio of effective conductors in the intermediate phase to those in the primary phase.

Abstract: A flat miniature dynamoelectric machine comprises a flat rotor with an assembled coreless coil, a commutator having an exposed portion for sliding contact with brushes and integrally carrying the rotor, a shaft on which the commutator is mounted together with the rotor, a housing including bearing means for rotatably supporting and housing the shaft together with the rotor and the commutator mounted thereon, one end of the shaft projecting externally of the housing, a magnet disposed within the housing in opposing relationship with the peripheral surface or end face of the rotor, electrically conductive brushes located within the housing for sliding contact with the exposed portion of the commutator, and a thrust bearing plate mounted on the housing in bearing engagement with the opposite end of the shaft. The thrust bearing plate facilitates close control over the mounting position of the shaft, thereby stabilizing the positional relationship between the various parts.

Abstract: A low power synchronous motor is disclosed having a rotor including a pair of rotor discs between which is sandwiched a permanent magnet which is polarized such that one of the rotor discs is a north pole and the other is a south pole. The stator includes an energizing winding having a core passing therethrough. A pair of complementary stator plates are secured at each end of the energizing winding to the core and are bent at right angles to form a coplanar stator air gap portion. The coplanar portion of the stator has a notched, circular air gap into which the rotor is positioned. The flat stator plates provide for easy assembly of the motor in a clock movement. The electrical energy coupled to the energizing winding is attenuated by means of a pair of impedance elements connected in series with the energizing winding and situated in the plug of the energizing circuit.

Abstract: 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 extending therefrom and spaced from each other at equal angular spacings. Two exciting coils each are disposed to face the pole teeth. Two magnets each provide radially north and south poles alternating at an equal angle with axially same polarities as the other magnet and facing the pole teeth, the number of poles on each permanent magnet being an even multiple of the number of pole teeth. The two rotors are in an opposite relation each other, the pole teeth of one of said two rotors being staggered from the pole teeth of the other by a predetermined electric angle. A condenser is selectively connectible to either one of said two exciting coils. Such miniature self-starting motor rotates reliably in a predetermined direction at the time of starting.