Abstract: A compact disk storage device having outer-rotor electric motor for directly driving a disk for recording and reproducing information has an axially deep, tank-form flange and a stationary shaft, upon which the mounting annulus of the flange and the ball bearings of the hub are axially displaced. The hub includes a cover disk for sealing an extremity of the ball bearings and an inverted cup shape rotor providing magnetic shielding. The flange includes a mounting rim substantially aligned with the back surface of the cup-shape rotor. The facing cup-like and tank-form shapes readily enable labyrinth seals and substantial and abutting axial extents along the axis of the stationary shaft.

Abstract: A compact outer-rotor electric motor that can be used for directly driving a disk for recording and reproducing information has an axially deep, tank-form flange and a stationary shaft, upon which the mounting annulus of the flange and the ball bearings of the hub are axially displaced. The hub includes a cover disk for sealing an extremity of the ball bearings and an inverted cup shape rotor providing magnetic shielding. The flange includes a mounting rim substantially aligned with the back surface of the cup-shape rotor. The facing cup-like and tank-form shapes readily enable labyrinth seals, comprising seals of the lower bearings.

Abstract: A fan is disclosed comprising an electric drive motor having a shaft with an impeller coaxially disposed thereon, the impeller configured to suck axially and to blow with radial directional components and including a hub which is turned down over the motor, the hub having a rearward broad end that is turned away from the flow and presenting an outer generated surface that is symmetrical in rotation with reference to the motor axis, the outer generated surface being widened like a funnel in the direction of flow and inwardly defining an annular flow passage, and wherein blades are fastened to the hub along the generated surface. Further, in the disclosed fan the outer edges of the blades extend along a surface of rotation that is coaxial to the axis of the motor, the surface of rotation being constantly widened in the flow direction like a funnel, the widenings of the generated surface and the surface of rotation at least preponderantly having an opening angle that is less than 90.degree.

Abstract: A circuit board containing control mechanisms for operation of an electric fan motor is fixedly assembled exteriorly to an end flange of the motor in only one position so that electrical contacts on the board extend through apertures in the end flange to cooperate with contacts on the motor side of the end flange to provide a completed motor. Assembly of the circuit board can be done without disassembly of the fan or motor, so that testing prior to insertion is possible.

Abstract: A small fan with an electric power motor is provided, the rotor of which is designed as a cup-shaped outer rotor and blade wheel hub. The outer wall of the blade wheel hub coaxially widens in the direction of air flow and forms the inner wall of an air flow duct. The fan blades are mounted on this outer wall, which wall, is conical shaped and is disposed as an outer lining over the cup-shaped outer rotor.

Abstract: A driving mechanism for magnetic hard disc memories includes an isolated space for maximum cleanness from the remainder of the apparatus, a driving motor mounted within the apparatus and having a stator and a rotor, the motor when energized having parts producing magnetic flux, a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc, a connection between the motor and the hub for driving the hub, and a magnetic flux shield located between the parts producing the magnetic flux and the space of maximum cleanness.

Abstract: An internal flux-conducting member is axially elongated and is manufactured with at least one radially extending electrical discontinuity, to prevent circumferential eddy currents from flowing therewithin in paths which are circular as viewed along its axis. The member may be a single unitary element into which elongated slots are cut, or may be assembled of a plurality of like rods which, when assembled together, have abutting surfaces which form the electrical discontinuities. The rods may be joined together by a nonconductive metal-bonding agent.An external flux-conducting member is disclosed in which at least two like curved frame elements which are made of ferromagnetic material are connected together so as to form a hollow, open-ended frame with an axially elongated and generally cylindrical shape. The frame thus formed contains a plurality of annular magnet rings which are all radially magnetized, with adjacent magnet rings being magnetized in opposite direction.

Abstract: A driving mechanism for magnetic hard disc memories includes an isolated space for maximum cleanness, a driving motor mounted within the apparatus and having a stator and a rotor, the motor when energized having parts producing magnetic flux, a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc, a connection between the motor and the hub for driving the hub, a magnetic flux shield located between the parts producing the magnetic flux and the space of maximum cleanness, and the rotor being detachably connected to the rotor shaft.

Abstract: A heat sink for instrument parts and electronic devices is provided, the heat sink including an elongated rectangular plate having cooling ribs, the ribs extending in the longitudinal direction of the plate. A fan having radial discharge is mounted on the plate to effect ventilation of the ribs and the devices mounted on the heat sink.

Abstract: A miniature diagonal blower with axial inward flow and radial outward flow is disclosed. The blower comprises a drive motor having a shaft stub and a motor housing, a fanwheel including a hub fitted with fan blades, said hub being mounted on the shaft stub of the drive motor, a fanwheel housing surrounding the fanwheel without contacting said fanwheel and being provided with recesses for the inward flow and outward flow, a flanged surface associated with the motor housing, said flanged surface projecting on the outward flow side beyond the fanwheel toward the inward flow, said fanwheel housing being provided with support legs distributed about the circumference of the fanwheel in the vicinity of the outward flow, said legs delimiting recesses located between them for the outward flow and being mounted by their soles on said flanged surface means associated with the motor housing with fastening means.

Abstract: An electric motor is provided with a stator and at least two armatures. In order to obtain a well adjustable and mechanically stable drive module, the stator is designed as the base plate of a multiple-shaft driving means.

Abstract: In an axial fan, the flow channel is constricted on the suction side in necked-down manner and is widened on the pressure side in diffuser-like manner. The electrical driving motor arranged in the center of the impeller has an overhung rotor, whose rotor shaft is supported in a punctiform bearing arranged on the suction side.

Abstract: A magnetic-tape cassette machine of the type including a horizontally extending tape drive shaft and a loading platform designed to hold the cassette upright during tape transport. To prevent the horizontally extending tape drive shaft from shifting axially during tape transport, one end of the shaft is supported against a first axial bearing secured to the machine housing and the other end is supported by an axial bearing secured to the loading platform. Alternatively, a single axial bearing is used limiting axial shifting of the tape drive shaft in one direction, and a permanent-magnet arrangement pulls the tape drive shaft in the same direction to prevent the shaft from shifting axially in the opposite second direction.

Abstract: The invention relates to an electric motor whose rear stator winding ends are embedded in a casting of electrically insulating plastic which is hard at the operating temperature of the motor, which is mounted with a stable metal flanged plate coaxial to the motor axis and fixed to a metallic outer casing member, wherein the flanged plate for the rear winding ends is perforated and is embedded in the casting up to its flange outer edge connected with the casing member at the axial height of the winding ends, surrounding the latter with an insulating clearance, the flanged plate serving too as a heat transfer means.A particular application of the invention is to built-in fans.

Abstract: A radial flow fan of short axial length and large radial dimensions and of the type having the drive motor arranged coaxially with respect to the fan wheel and at least partly inside of the fan wheel. The housing for the fan wheel and motor includes a flat metallic square plate forming an axial end face and a synthetic resinous material circumferential housing attached to the metal plate. The circumferentially extending housing portion also includes a portion defining the opposite end wall of the casing with respect to the metal plate end wall, which opposite end wall has a central opening for inlet of air. The synthetic resinous housing portion includes an exit port for radial exit of the air. The metal plate is connected with good heat conductivity with the stator of the drive motor by way of a flange of a bearing for the shaft of the drive motor and by way of a contact disc which axially supports the rotor shaft at the metal plate.

Abstract: A magnetic tape recorder has two electric motors only, one of which is arranged selectively to drive one or other of two winding hubs depending on the direction in which a magnetic tape is to be transported and the other of which drives a tape drive capstan. The first motor is disposed non-co-axially with the axes of the hubs and the second motor, which is flat in shape and has at least four pairs of poles, is disposed alongside and at the same level as the first motor.

Abstract: A radial flow fan of short axial length and large radial dimensions and of the type having the drive motor arranged coaxially with respect to the fan wheel and at least partly inside of the fan wheel. The housing for the fan wheel and motor includes a flat metallic square plate forming an axial end face and a synthetic resinous material circumferential housing attached to the metal plate. The circumferentially extending housing portion also includes a portion defining the opposite end wall of the casing with respect to the metal plate end wall, which opposite end wall has a central opening for inlet of air. The synthetic resinous housing portion includes an exit port for radial exit of the air. The metal plate is connected with good heat conductivity with the stator of the drive motor by way of a flange of a bearing for the shaft of the drive motor and by way of a contact disc which axially supports the rotor shaft at the metal plate.