Leroy L Rose

US Patent:

46052186, Aug 12, 1986

Filed:

Oct 26, 1983

Appl. No.:

6/545728

Inventors:

James A. Knepper - Longmont CO
Leroy Rose - Boulder CO

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

B65H 916

US Classification:

271238

Abstract:

A mounting mechanism for the backup roll of a roll pair wherein a four bar linkage is provided. The backup roll is mounted at one end of a first arm and bears against a mating roll positioned in a stationary location. The first arm extends to a pivot point around which the backup roll rotates to engage the mating roll. A second arm is rigidly connected to the first arm at the pivot point and extends to an end point. A third arm, comprised of a coil spring with a coupler threaded thereto, extends from the end point of the second arm to a stationary point. The fourth arm of the four bar linkage is the ground extending between the stationary points to which the first and third arms are attached. By adjusting the coupler, the number of active coils in the third arm is adjusted thereby adjusting the normal force between rolls to a desired value. By providing the first arm with substantially more length than the second arm, the normal force between rolls is maintained relatively constant over a wide tolerance in the stationary location of the mating roll.

US Patent:

46269436, Dec 2, 1986

Filed:

Jul 3, 1984

Appl. No.:

6/627651

Inventors:

Donovan M. Janssen - Boulder CO
Alan J. Kirton - Boulder CO
Robert M. Murphy - Longmont CO
Leroy Rose - Boulder CO

Assignee:

International Business Machines Corp. - Armonk NY

International Classification:

G11B 5016
G11B 1702
G11B 2112

US Classification:

360 99

Abstract:

A torsional actuator is disclosed for loading and unloading a flexible disk drive. The actuator includes a torsion beam having a biasing arm and a plurality of actuating arms extending therefrom with the free ends of the actuating arms being separately engageable with different ones of the collet, pressure pad and recording head arm of the flexible disk drive. The arms of the actuator are configured to enable selective and sequential movement of the collet, pressure pad and/or recording head arm in one direction toward a disk within the drive to establish a loaded, or operational, position and in the opposite direction away from a disk within the drive to establish an unloaded, or disk accessing, position with such positioning being determined by a force applying cam engageable with the actuator.

US Patent:

47077530, Nov 17, 1987

Filed:

Dec 9, 1985

Appl. No.:

6/807044

Inventors:

William J. Friehauf - Thornton CO
Donovan M. Janssen - Boulder CO
Alan J. Kirton - Boulder CO
Michael E. Nard - Longmont CO
Leroy Rose - Boulder CO

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G11B 555

US Classification:

360106

Abstract:

A flexible disk drive head access mechanism optimized for automated manufacture is disclosed. The mechanism is a complete subassembly. As such, the mechanism can be handled by a robot, as the mechanism is automatically mounted to the disk drive's main frame member. The mechanism comprises a stepping motor having a metal output pulley which is wrapped by a metal band. The middle of the band is welded to the motor's output pulley. The two free ends of the band are welded to a flexible, low-mass band tensioner. This tensioner is a thin, elongated member which includes a U-shaped portion which is operable to tension the band about the pulley. Attachment of the ends of the band to the tensioner not only tensions the band, but also operates to bend the tensioner slightly toward the pulley, thus causing the band to self-center itself in a 360. degree. wrap about the pulley. In this way, rotary to linear output from the mechanism is assured.

US Patent:

46283854, Dec 9, 1986

Filed:

Jul 6, 1984

Appl. No.:

6/628633

Inventors:

Donovan M. Janssen - Boulder CO
Alan J. Kirton - Boulder CO
Robert M. Murphy - Longmont CO
Leroy Rose - Boulder CO

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G11B 5016
G11B 1702

US Classification:

360 99

Abstract:

Two stage colleting is disclosed for a flexible disk drive. Precise registration of a floppy disk within a disk cartridge with respect to the spindle and recording head of a disk drive is achieved by first positioning the cartridge with respect to the collet, and then aligning the collet with respect to the spindle axis as the collet is moved toward the spindle. This two stage colleting is made possible by use of a collet shaft having two different diameters with the larger diameter being adjacent to the collet during positioning of the cartridge with respect to the collet and with the smaller diameter being adjacent to the collet to allow movement of the collet in a direction normal to the spindle axis during alignment of the collet with respect to the spindle axis.

US Patent:

46368922, Jan 13, 1987

Filed:

Jul 5, 1984

Appl. No.:

6/628044

Inventors:

William J. Friehauf - Thornton CO
Donovan M. Janssen - Boulder CO
Alan J. Kirton - Boulder CO
Robert M. Murphy - Longmont CO
Leroy Rose - Boulder CO

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G11B 5012

US Classification:

360 97

Abstract:

A flexible disk drive is disclosed that is optimized for automated manufacture. The critical elements of the disk drive are divided into two functional groups, one of which includes the elements for loading and unloading the disk cartridge and the other of which includes the elements for reading and writing on the flexible disk within the cartridge, with the elements of each group being precisely registered with respect to one another on separate frame members. The frame members are coarsely registered with respect to one another and snapped together, after separate assembly of at least most of the elements on the separate frame members has been completed, and fine position registration of the flexible disk to the spindle is thereafter achieved during each loading operation of a flexible disk into the assembly disk drive by collet centering and clamping the disk to the spindle. By this arrangement, automated methods of manufacture can be effectively carried out for assembly of each frame member as well as final assembly of the frame members.