Abstract: An electric motor mount has a sheet metal L-shaped base of first and second parts. The base first part has a rectangular aperture established by first and second arms lanced from the sheet metal and bent at about a 30-degree angle. The motor is secured to the proximal ends of these arms to have considerable radial rotational flexibility about the motor axis. The base second part has a circular aperture caused by a disc being punched therefrom. A fan blade is made from the circular disc and driven by the motor, which is mounted so that the fan blade is at this circular aperture.

Abstract: The invention relates to an electric motor having a fastening flange 10 and a bearing support part 7 made of plastic or a soft metal, the stator 23 of which is fastened on the outer diameter of the bearing support part 7. At the end of the stator iron core 9, which is on the side away from the flange, a toothed disk 24 made of metal is arranged having radially inwardly extending projections 26 which, in external contact with the bearing support part 7, hold the stator 23. The electric motor 1 can preferably be used in fans.

Abstract: A miniature motor with a frequency generator comprising a motor portion having a stator with a permanent magnet for forming a magnetic field and a rotor with rotor windings wound on a rotor core; electric current being fed to the rotor windings via a commutator making sliding contact with brushes, and a frequency generator for detecting the revolution of the motor, in which the frequency generator comprises a frequency generator rotor, mounted on the motor rotor, having a disc-like rotor portion made of a soft magnetic material and equipped with a plurality of magnetic-pole teeth on the outer periphery thereof, an internal-gear core of an annular disc shape, made of a soft magnetic material, disposed in such a manner as to come in contact with the inside of a motor housing and face the outer circumferential surface of the rotor portion and equipped with a plurality of magnetic-pole teeth on the inner periphery thereof, a permanent magnet forming a magnetic field between the magnetic-pole teeth of the rotor po

Abstract: A stator assembly for a non-static cogging brushless DC motor includes a hollow coil forming member fabricated of a nonconductive and nonmagnetic material having an array of generally radially extending teeth. Each tooth has a pair of generally radially extending sidewalls that extend substantially the entire axial length of the coil forming member. A plurality of coils is wound on the teeth of the coil forming member so that the coils are disposed in surrounding relationship with respect to the radially extending sidewalls of the teeth. The teeth on the coil forming member may extend either radially inwardly or radially outwardly thereof.

Abstract: An electrical multi-pole machine comprises a stator (1) having a soft-magnetic outer body (7) with permanent magnets comprising pole faces (9A-9D, 10A-10D, 11A-11D) arranged along a circular path, a rotor (3) which is coaxial with the stator and which comprises a soft-magnetic inner body (13) with teeth (15-22) comprising regularly spaced tooth surfaces (15A-22A) disposed along a circular path and which cooperate with the pole faces via an air gap (23), at least three active coils (29, 30, 31), and a machine shaft (5). The pole faces are arranged in groups, at least three groups (9, 10, 11) of magnets being provided, which groups are spaced from each other by coil slots (25, 26, 27) in which coil sides (29A, B, 30A, B, 31A, B) of the active coils are accommodated. Adjacent pole faces in each of said groups have opposite polarities.

Abstract: A dc electric motor having a rotor and a stator and at least a pair of oppositely disposed main magnets associated with one of the rotor and stator and including an end diverting magnet positioned at each end of each main magnet. The diverting magnets have a magnetic field perpendicular to the magnetic field of the main magnets and are oriented to increase the flux density of the main magnets with low magnetic leakage. Preferably, the main and diverting magnets are arcuate shaped segments of approximately 120.degree.. In addition, an interpolar diverting magnet may be positioned on both sides of each main magnet.

Abstract: An assembled commutator has a thermoplastics base supporting segments. A ring 15 of high temperature, non-softening material, such as phenolic, fits on a shelf on the base beneath tangs which are for hot connection, particularly forging, to an armature wire. The ring is held in place by fingers on the tangs.

Abstract: A magnetizing type induction motor includes a conventional rotor enclosed within a novel stator. The stator has a pair of crescent-shaped pole pieces, the thickness of the stator pieces at their centers being larger than the thickness at the opposite edges thereof. These stator pieces are secured together by a pair of end cover plates which are provided with fitting grooves for receiving the stator pieces, and coupling pins are installed between the facing edges of the stator pieces. This magnetizing type induction motor is easily miniaturized and is not subject to frequent failures so that it can be reliably used in automated apparatuses.

Abstract: A motor assembly includes a stationary assembly having a plurality of winding stages adapted to be electrically energized to generate an electromagnetic field and a rotatable assembly including a plurality of permanent magnet elements in magnetic coupling relation with the stationary assembly. The motor assembly also includes first and second substantially flat end members parallel to each other and having inner facing sides between which the stationary assembly and the rotatable assembly are located. Each of the members has an outer side opposite its inner side. Control circuitry is connected to the winding stages and positioned adjacent the outer side of the first member, for applying a voltage to one or more of the winding stages at a time and for commutating the winding stages in a preselected sequence to rotate the rotatable assembly about an axis of rotation. A cap on the outer side of the first member forms a closure with the first member within which the control circuitry is located.

Abstract: The in-line saw has a handle, a motor housing and a gear case which contains a drive mechanism which imparts a reciprocating action to the blade. The drive mechanism generates heat. The gear case is covered by an insulating boot which has internal ribs which contact the gear case and form air flow channels. The motor housing has air openings near the handle and the fan mounted on the motor drive shaft draws cooling air through the slots over the motor and out the space between the gear case and the motor housing except that the boot extends partially over the slot to divert air to the space between the boot and the case. The cooling air leaves the cooling space at the front of the boot to blow sawdust from the area of the blade. The boot is electrically insulating and covers the metal gear case.

Abstract: An improved commutator for an electric motor and a method of making the same wherein the outer surface of a commutator sleeve molded of a synthetic resin is coated with an insulating coating layer of an electrically insulating coating material. The molded commutator sleeve thus coated is protected from oxidative degradation and cracking which would otherwise result in removal of a commutator bar and insulation failure.

Abstract: An electric motor comprising a rotor having a permanent magnet and a stator having a stator coil disposed around the rotor. The electric motor also comprises a coil bobbin having a flange portion at opposite ends of a cylindrical body portion, one of the flange portions having a groove in which an insertion groove for inserting a coil terminal therein and other flange portion having a coil terminal engaging portion. The electric motor also comprises a coil terminal having one end engaged with the engaging portion and the other end connected to an external connection terminal, and a stator coil which is wound on the bobbin and connected between the coil terminal bend turn portion and the engaging end portion.

Abstract: A high torque AC stepping motor is provided. The motor includes a stator with six radially spaced coils. Spaced radially extending arms on an armature core are positioned adjacent the coils. The armature is mounted by a torsional shaft assembly including two concentric torque tubes. the torsional action of the tubes serves to return the armature to a home position after each current pulse. A one way sprag clutch is driven by the output shaft connected to the armature to turn an output gear or the like. A timer controls the AC power source to provide the precise rotary output. A system for precisely feeding webs of material for processing utilizing the stepping motor is also disclosed.

Abstract: A metal coil carrier fixture for mounting an annular field coil has a base and a lid separate from the base. The base has an upstanding tubular wall, a lower annular flange connected to, extending about and projecting outwardly from the tubular wall, and an upper wall disposed within and extending across the tubular wall and connected to an upper edge thereof. The lid has an inner central portion disposed in a substantially flush engaging relation with the upper wall of the base and detachably attached thereto, and an outer annular portion defining an upper annular flange extending about and projecting outwardly from the tubular base wall and spaced above the lower annular flange thereof when the lid is attached on the base.

Abstract: In order to reduce, in a permanent magnet-excited electric motor with at least four poles, the cost for the machining and assembly of a magnet arrangement and to thereby lower the production costs, a magnet arrangement with a magnetic surface radially magnetized with an alternating pole sequence which is composed of three indvidual segments following each other in the circumferential direction, with a pole division extending beyond two adjacent individual segments.

Abstract: A non-brush D.C. motor with an improved stator which is constituted by a base (1) made of plastics having sides, a coil winding (11) around the outer round circumference of the base, two magnetic poles each formed of a pair of polar plates (2,3) respectively fixed at both sides of the base and a circuit board connected at one side of the base with one pair of polar plates between the circuit board and the one side of the base.

Abstract: An apparatus for cleaning surfaces from substances adhered thereto comprises a multilayer electromagnet coil (1), a source (3) of pulse current, a paramagnetic plate (4) disposed between the surface (5) being cleaned and the electromagnet coil (1). The number n of layers (8) in the coil (1) is within two and five, each such layer having the form of a current-conducting helical bar (7) of rectangular cross section. The layers (8) are arranged in parallel planes and are connected in an aiding connection. With respect to two-layer, three-layer, four-layer, and five-layer electromagnetic coils (1) there is a predetermined dependence of the number W of coil turns (9) in each layer (8) on the optimum number W.sub.1 of turns (9), and the height h of the current-conducting bar (7) on the equivalent depth .DELTA. of penetration on the magnetic field into the metal of the electromagnetic coil (1).

Abstract: An electric motor has a casing having two opposed planar side walls and two opposed curved walls. A permanent magnet is located inside each curved wall and a wound armature is mounted in the casing. A commutator is connected to the winding and two brush arms are supported by a holder at one end of the casing. Each brush arm informed by two electrically conductive strips forming, respectively, a terminal part and a more resilient brush supporting part. The terminal parts extend out of one end of the casing in a plane of symmetry of the casing thereof and the brush supporting parts are secured to respective terminal parts at positions which are offset from the plane of symmetry, on opposite sides thereof.

Abstract: A flat brushless motor utilizable as a warning means in a portable communication device such as a pocket bell. The flat brushless motor is such that the center of gravity of the back-yoke (5a) is displaced from the center of rotation so that, by the rotation of the unbalanced back-yoke (5a), vibrations can be generated and, by the elimination of a weight or the like for generating the vibrations, the manufacture in a flat and compact size as well as the reduction in number of component parts can be attained.

Abstract: An insert sheet formed of insulating material includes an outer border portion and a pair of door-like panels foldably mounted on the border portion, the insert sheet being disposed with its border portion interposed between the inner surface of the motor housing and a field coil and the door-like panels being interposed between the winding coil and oppositely disposed surfaces of the associated field pole.