Abstract: A disk storage device that utilizes an inner rotor spindle motor in which the spindle shaft is fixed to the disk mounting hub and rotates therewith. Support for the spindle is provided by a bearing tube that has a greater diameter and greater rigidity than the stationary shaft or post typically employed to support the disk stack in an outer rotor arrangement. The bearing tube supports the bearings in which the spindle shaft is journalled and allows wider axial spacing between the bearings, reducing spindle run out. At the same time, the bearing tube functions to entrap contaminants from the bearings within the internal motor space and reduces contamination in the clean chamber. Further, the motor elements are located outside the clean room chamber, further enhancing the cleanliness of the environment surrounding the data storage disks.

Abstract: A disk storage device that utilizes an inner rotor spindle motor in which the spindle shaft is fixed to the disk mounting hub and rotates therewith. Support for the spindle is provided by a bearing tube that has a greater diameter and greater rigidity than the stationary shaft or post typically employed to support the disk stack in an outer rotor arrangement. The bearing tube supports the bearings in which the spindle shaft is journalled and allows wider axial spacing between the bearings, reducing spindle run out. At the same time, the bearing tube functions to entrap contaminants from the bearings within the internal motor space and reduces contamination in the clean chamber. By configuring the inner rotor, including the disk support hub, to rotate around the outer diameter of the bearing tube, an elongated “gap seal” is formed, allowing more efficient containment of contaminants from the bearings without need for expensive ferrofluicdic seals.

Abstract: A disk storage device that utilizes an inner rotor spindle motor in which the spindle shaft is fixed to the disk mounting hub and rotates therewith. Support for the spindle is provided by a bearing tube that has a greater diameter and greater rigidity than the stationary shaft or post typically employed to support the disk stack in an outer rotor arrangement. The bearing tube supports the bearings in which the spindle shaft is journalled and allows wider axial spacing between the bearings, reducing spindle run out. At the same time, the bearing tube functions to entrap contaminants from the bearings within the internal motor space and reduces contamination in the clean chamber. Further, the motor elements are located outside the clean room chamber, further enhancing the cleanliness of the environment surrounding the data storage disks.

Abstract: A disk storage device that utilizes an inner rotor spindle motor in which the spindle shaft is fixed to the disk mounting hub and rotates therewith. Support for the spindle is provided by a bearing tube that has a greater diameter and greater rigidity than the stationary shaft or post typically employed to support the disk stack in an outer rotor arrangement. The bearing tube supports the bearings in which the spindle shaft is journalled and allows wider axial spacing between the bearings, reducing spindle run out. At the same time, the bearing tube functions to entrap contaminants from the bearings within the internal motor space and reduces contamination in the clean chamber. By configuring the inner rotor, including the disk support hub, to rotate around the outer diameter of the bearing tube, an elongated "gap seal" is formed, allowing more efficient containment of contaminants from the bearings without need for expensive ferrofluidic seals.

Abstract: The present invention relates to an integrated driving system for signal-processing devices, especially video devices (recorders), disk drives, and other, preferably magnetic pulse recording devices, wherein the device chassis (1) and the mounting provision for at least two motors (20, 21, 22) are formed integrally with each other. The device chassis (1) proper also includes all mounting or bearing bores (e.g. 2, 50, 55) for all mounting shafts (e.g. 4, 8, 18) in a precise positional relation to each other. The bores (2, 50, 55) for all mounting shafts (4, 8, 18) and axles are formed in the metal-cast device chassis (1) in one or more machining operations without the necessity of re-chucking, ensuring that not only the active and passive driving sections of the driving system, but also the reference surfaces and bearing or supporting points are precisely positioned relative to each other.

Abstract: The present invention relates to an integrated driving system for signal-processing devices, especially video devices (recorders) and other, preferably magnetic pulse recording devices, wherein the device chassis (1) and the mounting provision for at least two motors (20, 21, 22) are formed integrally with each other. The device chassis (1) proper also includes all mounting or bearing bores (e.g. 2, 50, 55) for all mounting shafts (e.g. 4, 8, 18) in a precise positional relation to each other. The bores (2, 50, 55) for all mounting shafts (4, 8, 18) and axles are formed in the metal-cast device chassis (1) in one or more machining operations without the necessity of re-chucking, ensuring that not only the active and passive driving sections of the driving system, but also the reference surfaces and bearing or supporting points are preceisely positioned relative to each other.

Abstract: To lessen mounting time and to optimize positioning of the Hall generator, the Hall generator and control electronics influenced by the generator so as to actuate a brushless dc motor are arranged on a common substrate and are provided with a common protective envelope whose dimensions are somewhat narrower than the cross-section of the motor slot. This substrate is inserted in the motor slot so that the Hall generator is located outside the slot and in the effective magnetic field of the motor's permanent magnet.

Abstract: An axial-flow fan comprising a fan wheel surrounded by a casing, the casing having a cylindrical flow passage in its axial central portion which is broadened at least toward the exhaust side by way of corner pockets into a regular multi-corner profile circumscribing the diameter of the fan wheel. The hub of the fan wheel is provided on the inlet side with an annular surface that reduces the outer diameter of the hub in the form of a conical configuration that faces the incoming air and which extends at least over one-third of the entire axial length of the hub.

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: An axial-flow fan is disclosed which comprises a fan wheel and a housing casing surrounding said fan wheel, the fan wheel having a hub with a diameter which is at least half as large as the inner diameter of the housing casing and wherein the housing casing is cylindrical in the axial central plane and is broadened at least toward the exhaust side by way of corner pockets into a square profile circumscribing the diameter of the fan wheel. The hub of the fan wheel is provided on the inlet side with an annular surface which extends approximately over one-third of the entire axial length of said hub and which has a conical configuration toward the end face.

Abstract: The stator comprises a ferromagnetic structure including a pair of spaced parallel ferromagnetic bars. A row of magnets extends along the length of the bars, at the inner side of one of the bars. The individual magnets of the row are magnetized in a direction transverse to the elongation of the bars. The successive magnets of the row are of alternate polarity. An armature is mounted for travel along the length of the two bars and includes a plurality of coils spaced one from the next in the direction of elongation of the bars and oriented to cut through the magnetic field lines of the magnets of the row of magnets in the space intermediate the two bars. The armature coils are energized periodically and in a cyclical sequence causing the armature to travel along the length of the two bars.

Abstract: The motor includes an internal stator and an external rotor. A rotor shaft is connected to and rotates with the rotor. A mounting flange is located at one of the two axial ends of the motor. A bridge is fixedly connected with the mounting flange, and is in the form of a cylindrical housing connected at one axial end to the mounting flange, the end of the cylindrical housing remote from the end connected to the mounting flange extending radially inward with axial spacing from the rotor and having at such remote end at least one opening for the flow of external air therethrough. The external rotor is generally bell-shaped. Blower blades are provided on the external rotor in the region of the bottom of the bell-shaped external rotor. The motor at the axial end thereof provided with the mounting flange is provided with at least one opening for the axial flow of air through the interior of the cylindrical housing.

Abstract: In order to reduce the cost of producing an in-hub a magnetic hard disk storage device having a motor, which consists of a hub and the motor which is located in this hub and which contains magnets, magnetic yokes, coils, and shieldings, the hub (2) made of magnetizable steel is coated at least on the outer surface (20) with a noncorrosive coating which is reduced by means of final machining in the completed state of the motor.

Abstract: The present invention relates to an integrated driving system for signal-processing devices, especially video devices (recorders), and other, preferably magnetic pulse recording devices, wherein the device chassis (1) and the mounting provision for at least two motors (20, 21, 22) are formed integrally with each other. The device chassis (1) proper also includes all mounting or bearing bores (e.g. 2, 50, 55) for all mounting shafts (e.g. 4, 8, 18) in a precise positional relation to each other. The bores (2, 50, 55) for all mounting shafts (4, 8, 18) and axles are formed in the metal-cast device chassis (1) in one or more machining operations without the necessity of re-chucking, ensuring that not only the active and passive driving sections of the driving system, but also the reference surfaces and bearing or supporting points are precisely positioned relative to each other.