Abstract: An electromotor, in particular a drive motor for a barrel or container pump, having an outwardly encapsuled motor housing made of a material having good heat conducting characteristics, such as aluminium. The motor housing is provided on its outer side with a shield of an electrically non-conducting material. The shield is surrounded on its outer side with a mantle which forms, with the housing middle portion, a through-stream gap for the passage of cooling air. This outer mantle includes a pair of housing caps, which overlap the end-support shields of the motor housing, and between which housing caps there extends the mantle which shields the outer surface of the housing middle portion by forming the through-stream gap for the passage of cooling air. The outer shielding of the entire motor housing prevents contact with metallic parts and thereby current conducting parts of the motor by a person servicing the device.

Abstract: There is provided a totally enclosed electric motor which is effectively cooled by means of an internal ventilation system and an external ventilation system. The internal ventilation system includes an internal fan driven by the rotor which forces internal ventilating air into and along an annular series of longitudinal internal ducts arranged adjacent to the internal cylindrical wall supporting the stator. The internal ventilating air leaving the internal ducts enters a brush compartment where the air is directed axially over the commutator and through the stator-rotor arrangement and back to the internal fan. The external ventilation system includes an external fan driven by the rotor which forces external ventilating air from the atmosphere into and along an annular series of longitudinal external ducts arranged radially outwardly from the series of internal ducts and into exhaust compartments at the far axial end of the motor.

Abstract: A fan drive and water slinger seal for a vertically mounted electrical motor. A fan is placed on a motor shaft so opposing flats on the interior surface of the fan hub fan mater with corresponding flats on the shaft to prevent slippage between the fan and shaft during motor operation. The hub contains a spring like finger extending upward axially along a groove in the inner wall of the hub and engaging an annular groove on the shaft to prevent axial movement of the fan along the shaft. The fan is positioned between a motor endshield and an overlying drip pan which encircles the shaft and carries liquid away from the motor. A flexible slinger snugly and adheringly fits on the shaft and has an O-ring type interior seal for sealing within a second annular groove on the motor shaft.

Abstract: A refrigeration motor compressor assembly has a housing including a lubricant sump in the bottom thereof into which the lower end of the drive shaft and associated rotor extend. A shield is provided which is positioned by the drive shaft and extends above the oil level in the sump in surrounding spaced relationship to the lower end of the rotor. As the rotor rotates within the shield, lubricant contained therein is thrown out of the surrounding shield and a close fit between the shield and the shaft restricts return flow of lubricant into the area occupied by the rotating rotor.

Abstract: A windshield wiper motor having a motor casing and a reduction gear casing is provided with a crooked air passage between the casings which is provided with a breather hole at a position that neither coincides nor overlaps with a projection of the respective openings of the passage into the gear casing and motor casing, so that it is possible to perform a breathing action even if lubricating oil penetrates into the air passage through the opening since the oil will be prevented from entering and clogging the breather hole.

Abstract: A motor mounting means for a centrifugal coolant pump having its own cooling fans has a housing provided with a supporting surface therein for supporting a motor and flanges extending from one interior wall which index a motor and restrain the motor against rotational movement. A cap is secured to the housing by bolts extending through lugs located on the outside of the housing and into posts in the cap so that the size of the cooling fan is maximized. Index vanes within the cap position the cap and abut against a topside of the motor to secure the motor against the supporting surface.

Abstract: In an electric motor having a stator with end turn windings on opposed faces thereof and a rotor and shaft extending through the stator, an improved motor cooling arrangement including a baffled cage-like fan separately and proximally surrounding the end turns on one face of the stator and a particulate trap mounted on the shaft in cooperation with the baffled cage-like fan.

Abstract: A portable crash-survivable kinetic flywheel storage machine which makes use of a ring shaped flywheel which is designed to be suspended by electromagnetic levitation. The structural and mechanical arrangement combine to allow functions which the unique electronic suspension system will interact with. The combination will allow rigid suspension and special crash stabilization capability, which is more important to the function of this particular invention than the efficiency advantage of the ring shape by itself. The flywheel is mostly composed of circumferentially wound fiber reinforced composite material. Induction loops are embedded in the skin of the flywheel, and a thin magnetic ring is positioned along the inside of the flywheel. This minimum excess mass is attached to the high strength flywheel in order to reduce the total parasitic momentum which will have to be controlled by the magnetic levitation system due to outside forces. A solid, hermetically sealed, physical enclosure surrounds the flywheel.

Abstract: A rotating electric machine with an external rotor constituted by an asynchronous motor with a cage rotor, in which the rotor structure, instead of being mounted protrudingly on a stationary axial supporting element is supported thereon by means of two end shields mounted by means of respective bearings on an axial supporting element, which is monolithic with a stationary supporting shield.

Abstract: The brush holding device includes a brush box formed into a tubular shape, having opposite open ends, and being slidably provided in a hollow portion thereof with a brush. A cap is capped onto one end portion of the brush box to block the end portion, and for receiving a reaction force of a brush spring to bring the brush into sliding contact with a commutator. A projecting portion is provided on the cap to engage a portion of the brush box, so that side walls of the brush box can be prevented from deflecting inwardly. A frame portion of the cap may be coupled onto the outer periphery of the rear end portion of the brush box.

Abstract: In a self-ventilated electric motor such as utilized in a textile spinning mill machine, a fan cowling and cover plate are arranged to define a ventilating air flow pathway by respective support members which are disposed entirely outside the pathway to prevent accumulation of lint and debris on the support members.

Abstract: An electric motor with attached tachogenerator wherein the tachogenerator may be attached to electric motors of varying types without significantly changing the housing or motor shaft bearing plate configuration and while maintaining the required environmental protection. The rpm signal generator of the tachogenerator is placed onto a motor shaft end portion which extends out of the motor housing through the shaft bearing plate and is enclosed by a closable housing accommodating a detector, e.g. a coil. The housing is latchable, for example by means of detent hooks, to the bearing plate or motor housing. The arrangement is particularly useful for electric motors where dust free and liquid tight protection is required.

Abstract: In an electric motor including a rotor on which is mounted a blower and a centrifugal actuator having spring-loaded lever members projecting through a centrally disposed recess in the spaced radial blade carrying back plate of the blower, an improved cover assembly arranged to be mounted on the rotor in interfitting relation with the spaced radial blades of the blower to cover the centrally disposed recess preventing contaminant build-up on the centrifugal actuator.

Abstract: A water-resistant fan motor has a water spray deflector which includes a closed central portion fan blade and a closed, convex, coaxial deflector between the fan blade and the motor housing. This convex deflector establishes a first small gap between the periphery of the rotatable convex deflector and a portion of the housing substantially at the outer diameter thereof. A second small gap between a portion of the rotor and a portion of the housing is unaligned with the first small gap and an enlarged cavity is in series between the first and second small gaps. This construction establishes a labyrinth for any water spray, and hence inhibits any water spray entering the interior of the motor housing. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: An explosion-proof electrical generator includes a generally toroidal casing with one open end and a central circular end wall or plate or cylindrical fan-containing cup extending across and closing the center of the torus; a circular cover closing the open end of the casing; a stator defined by laminated plates and windings located in the annular recess of the casing; and a rotor mounted in the cover and including a shaft, and a bowl-shaped cup carrying a ring of permanent magnets in its side wall, which extends into the casing recess between the stator and the outer side wall of the casing. Cooling fins are provided on the casing and cover for dissipating heat produced in the generator. The generator has a circuitous or small interior flame path for reducing flame temperature and thus the likelihood of fire or explosion outside of the generator.

Abstract: In an in-tank type motor-driven pump actuated by feeding a power from the outside of a pump casing through an external conductor, an end of the external conductor is extended inside the pump through a through hole formed in an upper motor cover; the external conductor is held in the through hole by a supporting member, and the end of the conductor is directly or indirectly connected to a brush for the motor.

Abstract: The hydraulic microturboalternator comprises a plastic molding which wraps the laminated stator (2) of the microalternator while providing an interior water chamber (20) intended to receive the rotor (1) and of which the inner diameter is at least equal to the outer diameter of the rotor increased by a fraction of the radial thickness of an airgap of particular shape and size, said molded body being sealingly closed by a casing (14) which limits a water chamber (21) containing the turbine (15) and which communicates with the chamber (20). Application is to gas-operated apparatuses for the production of hot water but designed to function without a permanent ignition pilot.

Abstract: An electric industrial robot comprises a movable robot assembly (10) forming therein an airtight chamber, and an electric drive unit for driving the robot assembly. The electric drive unit comprises a plurality of motors (36-41). The respective casings (36a-41a) of the motors are disposed within the airtight chamber (30) of the robot assembly. Electric cables (57-62) connected to the motors, respectively, are led through the airtight chamber into a fixed pipe (67) connected to the robot assembly. The interior of the motors and the interior of the airtight chamber are kept at a pressure higher than an atmospheric pressure outside the robot assembly.

Abstract: To protect the space within which the slip rings (20a, 20 b) of a vehicular-type alternator operate, against extraneous contamination, a plastic sleeve (29) with an axially extending gap (35) is snap-connected with the inner wall defining an opening (28b) of a connection plate (23) already present in the alternator; this retains the sleeve (29), preferably of plastic, within the alternator, the other axial end thereof being secured to an internally extending projection from the B-end shield (15), either formed by a plastic bushing (19) surrounding the B-bearing (18) or an internal flange (36) already present on the end shield (15).

Abstract: A pinion shaft starter for internal combustion engines having its pinion coupled to the shaft of the starter motor through an overruning clutch is disclosed in which a dividing wall member is mounted to define in the starter housing a first chamber located on the side of the pinion and a second chamber on the side of the starter motor, with a dust discharging vent formed in the first chamber, at a circumferential point externally of the wall member. The wall member is provided to encircle the external circumference of the overrunning clutch regardless of the position of the clutch which is axially moved by the solenoid switch to bring the pinion into or out of engagement with the ring gear on the flywheel through an opening formed in the starter housing. To insure sealing between the outside clutch circumference and wall member, an annular ring is provided along the inside periphery of the wall member.

Abstract: An improved drain structure for a vertically mounted electric motor to be positioned below a liquid sump into which the rotor shaft of the motor can be connected including a drip pan through which the rotor shaft passes, the pan having peripheral side walls and drain means attached thereto and a liquid slinger above the pan adapted to sling liquid leakage in a radially outward direction below the pan side walls to be drained away from the motor.

Abstract: A spark-protected alternator has an external cavity on an end plate of the alternator housing with commutating (slip) rings on an alternator shaft extension and mating metal brushes positioned within the external cavity. The external cavity is effectively sealed from ambient atmosphere surrounding the alternator, to provide protection from sparks generated between the brushes and commutating rings wherein a minimum area of the housing end plate is utilized. Integral extensions of the end plate form side walls of the external cavity that partially radially surround the shaft extension and commutating rings. A brush holder in which the brushes are attached has projections which mate with slots in the side walls to radially close the external cavity, and an end cap (including a gasket) closes an open end of the external cavity, while the end plate effectively closes the other end of the external cavity.

Abstract: An explosion-proof plug includes a first casing part having two ends and an outer wall having an edge and defining a compression-resistant annular chamber being open toward one of the ends, an annular transformer disposed in the annular chamber, a cover secured to the first casing part covering the annular chamber and the transformer, a second substantially bowl-shaped casing part adjacent the edge of the outer wall, the second casing part and the cover together defining a first connection space with increased security as compared to other portions of the plug for receiving connecting cables to be connected to the transformer, a third casing part securely connected to the first casing part defining a second space of increased security, and plug pins being held in the third casing part and connected to the transformer.

Abstract: An improved engine starter has a DC motor with a rotor shaft drivingly connected to an output shaft by a planetary reduction gear, the sun gear of the reduction gear being formed on the outer surface of the rotor shaft and the ring gear of the reduction gear being located on the inner surface of the yoke of the DC motor. The improvement comprises the yoke having a support portion integrally formed thereon which rotatably supports a one-piece end of the output shaft which is connected to the rotor shaft. Preferably, the yoke is formed by deep drawing of mild steel. A dust preventing member forms a labyrinth seal around the rotor shaft and prevents dust from entering the motor from the reduction gear.

Abstract: A sealed type internal pressure explosion proof robot motor assembly. The robot has a plurality of arms pivotably connected thereto and is used in an explosive atmosphere. Each arm is formed with an airtight chamber in which an electric motor is encased. These chambers are connected to one another so as to communicate by means of sealed hoses encasing wiring therein. Air or gas of a pressure above atmospheric pressure is supplied to the chamber through the hose. The electric motor is a DC print motor.

Abstract: Cooling air is introduced through an opening in a wall portion of the motor housing radially opposing the commutator. A deflecting surface is provided for deflecting the cooling air entering the motor through the opening away from the commutator and toward the armature so as to prevent direct contact of dust and moisture in the cooling air with the commutator.

Abstract: In a waterproof device for an electric motor having a cylindrical motor frame body which is split into a discrete portions in the axial direction of the motor, an annular elastic member is attached onto the motor frame body in a manner to cover the joined portions of the split frame body, and a lead-out portion having an insertion port is formed in the elastic member to enable a power supply lead wire for the electric motor to be pushed into the insertion port.

Abstract: An electric motor having a bearing and a commutator with brushes on one end of the rotor shaft, and a dust seal for the bearing formed by a sleeve forming part of and extending axially from the bearing into an annular recess in the commutator. The sleeve defines an open-ended conical space around the shaft, tapering to the bearing.

Abstract: The motor has two motor flanges (1,2) which form the stator with stator magnets projecting axially inward from the inner sides (11,12) of the flanges, the magnets being distributed along a circle coaxial with the motor axis, and a slightly conical rotor (9) in the air space between opposing stator magnets (11,12). On the output side of one motor half, and facing outwardly, is an annular space defined by the stator magnet (11) on the output side of the motor flange (1). A blocking brake (18 to 23) is mounted in a space-saving manner, with the stationary half of the brake (18 to 21) placed in an opening made for it in the outer flange piece (18) in the motor flange (1) and attached to it. The rotating half of the brake (22,23) is attached to the motor shaft (6). In this way, the motor and friction brake form a compact structural unit whose dimensions are not greater than those of an ordinary motor housing.

Abstract: A dynamoelectric machine (e.g., an induction motor) for use in a dishwasher application or the like is disclosed, with the motor having its rotor shaft extending generally vertically, and having an endshield disposed horizontally. The endshield is so structured as to have an upwardly facing trough or the like formed in the upwardly facing surface of the endshield for channeling water which may drip down onto the endshield radially outwardly away from the rotor shaft to portions of the endshield located out beyond the stator core and windings of the motor. Drain openings or tubes are provided in portions of the endshield out beyond the stator core and windings such that the water channeled to the drain openings is prevented from coming into contact with the stator and windings of the motor.

Abstract: A submerged electric motor comprises an outer hollow cylinder formed of a stainless steel, a stator iron core fixed on the inside of the outer cylinder, an annular end plate of a general structural rolled steel welded to an annular end portion formed between the outer hollow cylinder and an inner hollow cylinder coaxial with it by using a welding wire of the stainless steel. A combined deposit metal and fused portion underlaid with the end plate is machined to have an end surface flush with that of the end plate. A bracket is fixed to those end surfaces through bolts. Also a sheet-shaped soft sealing member may be interposed between the bracket and the machined end plate.

Abstract: A reduction gear type D.C. starter motor for an internal combustion engine including a planetary type reduction gear system mounted in a front bracket at a faucet joint portion between it and a rear bracket, the rear bracket and the yoke being integrally formed.

Abstract: A self sealing motor lead wire grommet comprising a pair of identical molded plastic grommet members insertable into a slot or notch of the shell of an electric motor. The grommet members each have wire receiving notches in their inner abutting edges and grooves along their other edges for receiving a portion of the shell adjacent the slot. In the preferred embodiment the outer grommet member is inserted in the slot and is engaged by the end shield of the motor. Consequently, when the end shield is secured in position on the shell, both grommet members are clamped together in tight engagement with the shell and the end shield, and the lead wires are clamped in their respective wire receiving notches between the abutting grommet members thereby to close or seal the lead wire pass-through slot in the motor and to seal the lead wires to the grommet members.

Abstract: A charging generator for a motor vehicle comprises two connector housings disposed in diametrically opposite relationship on a bracket of the charging generator, including a single male terminal and a pair of male terminals respectively, a cup-shaped waterproof cover fixed to the bracket to cover a substantial portion, two connector housings disposed on the water-proof cover so as to be fitted into those on the bracket and including a single fitted terminal, and two fitting terminals respectively, the terminals being fitted onto associated male terminals on the bracket.

Abstract: An a.c. generator for a car comprises a waterproof cylinder made of a plastic resin which covers the outer periphery of slip rings, a first flat plate to separate and insulate an external terminal from a bracket, and a second flat plate extending toward a rectifier with a predetermined gap between the second flat plate and the rectifier.

Abstract: In a canned motor including a stator with a cylindrical housing, a stator core having a stator winding and mounted on an inner surface of the motor housing, a pair of end brackets each secured to one of two opposite open ends of the motor housing, a cylindrical can mounted on an inner side of the stator core and secured at opposite ends to the end brackets, and a rotor arranged on an inner side of the can, the stator sealed by the can is filled with a porous insulator. The canned motor having the stator provided with the porous insulator is produced by a method wherein a mixture of filler in particulate form and resin in powder form is poured in a space in the stator sealed by the can, and the mixture is heated to allow the resin to cure to form the filler and resin into a porous body, to achieve molding of the stator and provide it with an insulator in the form of the porous body.

Abstract: A charging generator for a car comprises a recess formed at the lower portion of the fitting part of a rear bracket to a stator coil in which a drain hose is fitted.

Abstract: A gland seal assembly is provided which utilizes a double oil flow in conjunction with two gland seal rings. One of the oil streams is passed through a gland seal ring in a radial direction into the clearance gap between that ring and a rotatable shaft. Another flow of oil is passed between that ring and another gland seal ring in such a way as to exert a force between the rings which pushes the two rings in opposing axial directions away from each other and toward axial faces of an angular groove in a gland seal bracket. By causing a force against the gland seal rings in axial opposing directions, the rings are moved towards the axial faces of an annular groove in such a way that gaps between the gland seal rings and the groove wall are reduced with a corresponding reduction in the non-functional flow of oil.

Abstract: In an encased electric motor within a casing, an electrically insulating varnish is applied by vacuum impregnation to the inside surfaces of the casing and to the outer surface of the stator of the motor. The remaining empty space within the casing is filled with a heat conducting gas mixture comprising approximately 60-90% by volume of helium, with the remaining percentage being an electrically insulating gas having better electrically insulating properties than helium, such as sulphur hexafluoride. This encased motor is much lighter than conventional encased motors in which the stator enclosure is filled with a heat conducting resin potting compound and avoids warping damage which frequently occurs in conventional encased motors due to thermal expansion of the heat conducting resin potting compound.

Abstract: A brushless electric micromotor comprised of a rotor, a shaft and a tube-like part and permanent magnets rotatably mounted and hermetically sealed in a rotor housing, said shaft being supported in bearings. The permanent magnets have their co-axial surfaces coated with a layer of an electrically conductive metal. The micromotor further comprises a stator co-axially surrounding the rotor housing and comprising field windings regularly arranged with equal angular distances in the stator housing made of magnetic material.

Abstract: To separate cooling fluid, such as water, from the commutator space of a dynamo electric machine, typically a motor for battery-energized vehicle, a disc (18) of insulating material is fitted on the commutator (5), terminating at its end portion in a slinger structure (20, 21) which is positioned in intergaging relation with respect to a labyrinth (21, 22) secured to the housing of the machine. Cooling fluid is admitted to the space within which all the electrical windings (3, 9) are located, so that the cooling fluid, for example water, can fill the space (28) of the housing, while being separated from the space (57) within which the commutator (5) and commutator brush holder (7) is located.

Abstract: An electric motor construction comprises a housing with a motor rotor rotatably mounted in the housing with stator windings disposed in the housing around the rotor. The housing has a wall with an opening therein and a terminal box plug connector for the stator windings is mounted on the wall around the opening and includes an upper and a lower interengageable connector parts. A sealing gasket disposed between the parts which may be plug interconnected and held into position by a snap action lock. The stator windings have lead wires leading from the housing into the connector part and a continuous sealing compound resistant to humidity, vapors and gamma radiation embeds the stator windings and the lead wires and extends from the housing into the connector parts.

Abstract: An electromagnetic clutch is disposed between a drive source and a driven device for connecting and disconnecting the drive source to and from the driven device, respectively. The electromagnetic clutch includes a body rotatable by the rotative power from the drive source and an armature faced to, but normally spaced from the rotatable body. An exciting solenoid when energized moves the armature into an engaging position where the armature is attracted and urges against an end face of the rotatable body. A bearing is disposed between a fixed member of the driven device and the inner peripheral surface of the rotatable body for rotatably supporting the rotatable body on the fixed member. A cylindrical cover member is fixedly mounted, independently of the bearing, on a portion of the inner peripheral surface of the rotatable body between an axial end face thereof and the bearing.

Abstract: A charging generator for a motor vehicle has a rear casing portion including a flat end wall facing a brush holder. Two protuberances and a protuberance are disposed in opposed staggered relationship on opposed portions of the flat end wall and the brush holder to form a labyrinth between them. The labyrinth is filled with a grease and blocks the space between vent holes disposed in the flat end wall and the brushes housed in the brush holder.

Abstract: A charging generator has two slip rings surrounded by a cylindrical cover provided on the periphery with an axially extending opening, a brush holder including one end portion inserted into the opening and slightly spaced from each edge of the opening and two spring loaded brushes held in the holder to contact slidably the slip rings. The cover includes a protrusion located adjacent to each edge of the opening so as to extend substantially radially outwardly and the brush holder includes two opposite protrusions extending along adjacent portions of the outer cover periphery and toward the adjacent protrusions of the cover to form labyrinths between them. The labyrinths are filled with a grease.

Abstract: An alternator filter arrangement which encorporates an alternator having a driven shaft passing through its housing which has an air intake therein and a non-magnetic filter screen mounted for rotation with the driven shaft with the filter screen being in close proximity to and substantially encompassing the air intake.

Abstract: A self-aligning bearing assembly includes a bearing sleeve having a spherical outer contour supported at one side of the equator thereof by a plurality of arms having spherically concave ends making intimate contact with the spherical outer contour. A retaining member engages the spherical outer contour at the other side of the equator to secure the bearing sleeve against linear displacement but to permit angular adjustment about the center of the spherical outer contour. A wick member having fingers fitting into windows in the bearing sleeve conducts a lubricant such as oil to the tangential surface of a shaft. A reservoir containing an absorbent material having a lubricant absorbed therein and available therefrom surrounds the bearing sleeve with the absorbent material in contact with the wick member.

Abstract: At least one circumferential slot is provided at a predetermined axial position on an armature core so as to cross axial slots receiving a plurality of coil sides of an armature winding and to communicate adjacent axial slots, and the plurality of coil sides to be generally mounted in the same axial slot are partially shifted from one slot to an adjacent one through the circumferential slot so that the coil sides of the armature winding are partially arranged to extend through adjacent slots at a fixed, predetermined circumferential distance. In this manner, the generation of commutating spark is substantially prevented and the commutating performance is improved.

Abstract: A charging generator for a vehicle comprises a stator; a rotor facing said stator with a gap; a pair of slip-rings mounted on said rotor; a pair of brushes sliding on said slip-rings; a brush holder for holding each said brush; a first hole formed on the pair of said brushes in the shaft direction; a housing which holds said rotor; a second hole formed on said housing to insert a pin into said first hole from outside of said housing so as to detach said brushes from said slip-rings; a lubricant for sealing said second hole; and a lubricant holder for holding said lubricant which is placed near said second hole.

Abstract: This disclosure relates to an electric motor of a motor-pump assembly, the motor including an improved end bell. The end bell is located between the motor and the pump of the assembly and forms a common wall between them. The end bell is made of a material having a relatively high coefficient of thermal conductivity, and a cover made of a material having a relatively low coefficient of thermal conductivity separates the pumped liquid from the end bell. A bearing is supported by the end bell, and condensation around the bearing is prevented by the cover and by means for circulating relatively warm air around the bearing.