Abstract:
A flex circuit support and seal apparatus (148) which established a signal path between a read/write head (132) and read circuitry of a printed circuit board (240) of a disc drive (100), the signal path having substantially uniform capacitance and inductance over the entire length thereof. The flex circuit support and seal apparatus comprises a flex circuit (150) with a conductor portion (154), a rigid dielectric support bracket (156), and a compressible, dielectric gasket seal (174), and extends through a connector aperture (162) of a basedeck (104). The support bracket has a base portion (158) and a connector portion (160) vertically extending bi-directionally from the base portion. The gasket seal is secured between the basedeck and the support bracket. The connector portion supports the conductor portion of the flex circuit and extends through the connector aperture. The support bracket and the attached flex circuit is secured to the basedeck.
Abstract:
A swage mount (17) for an actuator arm assembly includes a base plate (44) having a first side and a second side. A hub (52) extends from the first side of the base plate with the hub having an aperture (56) therethrough. The second side of the base plate is mounted on either the actuator arm (20) or the load beam (10) so that the aperture of the hub is in registration with a swage opening disposed in the actuator arm or the load beam. The hub is inserted in the swage opening of the other of the actuator arm or load beam thereby forming an interference fit therebetween. The swage mount is surface hardened by gas carburizing, bead blasting or tumbling thereby increasing the torque retention value of the interference fit.
Abstract:
A dual tape drive system is described for accepting either a digital data tape cartridge (13) for data backup or a standard audio cassette tape (15) for audio play and record. A single dual purpose tape head may be utilized for interfacing with both digital data tape cartridges and audio cassette tapes. In an alternative embodiment of the dual tape drive system, separate tape heads (26, 28) may be utilized such that an "audio" head (28) is dedicated to cassette tapes (15) while a "data" head (26) is dedicated to digital tape cartridges (13). The dual tape drive system may exist as a stand alone device or may be integrated into a computer system whereby the tape drive is controlled through a keyboard operatively coupled to the computer system.
Abstract:
A flexible disc drive having a standard head for accessing standard tracks spaced specified intervals is provided with an additional head having a gap whose width smaller than the interval of the standard tracks so as to access the parts between standard tracks as additional tracks. Mutual interference is prevented by setting the recording carrier frequency for the additional head higher than that for the standard head. The capacity can be increased while maintaining the compatibility with a standard drive.
Abstract:
A magnetic disc drive assembly comprises a disc drive housing having an external three-dimensional configuration matching a standard configuration. A disc drive (100) is supported in the housing (102) and includes a stack of rotatable rigid magnetic recording discs (104) in a unique configuration wherein each disc has a diameter smaller than the diameter of rigid discs ordinarily contained in a disc drive housing having the standard configuration. Optionally, the stack of discs includes a number of discs greater than that normally housed in a disc drive housing having the standard configuration. Various techniques are employed to achieve the unique disc configuration, including a stop mechanism (151, 152, 153, 154) attached to the yoke of an E-block assembly (142), a conductor assembly (214) electrically connecting transducers (144) on the E-block to a flex circuit (172, 220) and employing fins (218) supported in slots (204) in the E-block, a cable connector (130) mounted to a circuit board (131) supported on the disc drive housing and having a connector housing (300) having a surface (312) conforming to a curved edge portion (111) of the disc drive housing, and a desiccant housing (186) providing structural support for the disc drive housing.
Abstract:
A disk drive system includes a base, a disk rotatably attached to the base, and an actuator assembly movably attached to the base. The actuator assembly moves the transducer to selected areas of the disk where information representative of data is to be written or read. The actuator assembly maintains the transducer in a transducing relationship with the disk. The actuator assembly also includes an arm which has a first layer of material including a plurality of elongated fibers orientated in a first direction, and a second layer of material including a plurality of elongated fibers orientated in a second direction. The first and second layers are part of a composite material. The transducer is attached to said arm. The resulting actuator arm has a resonant frequency that can be varied or moved or shifted by varying the direction of the elongated fibers in the second layer with respect to the direction of the elongated fibers in the first layer. The resonant frequency is varied so that it is at a different frequency than the resonant frequency peaks associated with the other components of the disk drive, such as the resonance frequency of the disk or disks of the drive and the head suspension assembly (HSA). The arm may also include signal-carrying wires which are positioned between the layers of the composite arm and heat conductive fibers to remove heat from a heat producing source, such as from a chip on the arm.
Abstract:
A head suspension (10) has an integrated multi-layer trace conductor array (16) for supporting and electrically interconnecting a read/write head (20) to electronic circuitry (54) in a disk drive (30). The trace conductor array (16) includes an integrally formed electrical shield (72) which may be grounded or ungrounded and formed to have a depth greater than a skin effect depth at a frequency of an interfering wave front.
Abstract:
A rolling bearing is used for supporting a rocking mechanism or a rotating mechanism, and a film comprising a fluorine-containing polymer having a functional group(s) under a fluidized state or a film comprising a fluorine-containing polyurethane compound under a solid state is formed on at least the track surface of the rolling bearing. Since this film does not contain ions for uniformly dispersing a thickner having non uniform particle sizes such as fluorine based grease of the prior art, breakage of the film between a rolling element and a race is not likely to occur, and wear of a rolling element race resulting from the direct contact between them due to breakage of the film can be reduced. When this film is the same kind of a film as a protective film of the surface of an information recording disk, dust generating components of the film are the same kind of components as those of the protective film, and information recording/reproduction of the information recording disk is not impeded.
Abstract:
A servo address is encoded in a disk drive system having at least one disk for storing data. A servo address associated with a sector in a track, or cylinder, on a surface of a disk and comprised of a sector number, a track number, and in multiple disk systems, a head number is encoded into the encoded servo address. Encoding the servo address saves disk storage space because the encoded servo address uses fewer bits than a conventional servo address while still enabling the disk drive system to locate positions on the disk.
Abstract:
A bidirectional thin-film magnetoresistive tape head assembly (180). The invention minimizes wear on the head assembly by: (1) minimizing the distance between the read elements (186) and their respective write elements (198), (2) forming the head assembly from hard materials, and (3) placing a hard block (50) between the read and write elements. The head assembly uses only a single pair of read and write elements per data track, but the pairs are reversed with respect to each other so that the head assembly is capable of reading-while-writing on the tape in both directions.