John H Blagaila

US Patent:

54484332, Sep 5, 1995

Filed:

Oct 13, 1993

Appl. No.:

8/135868

Inventors:

James H. Morehouse - Jamestown CO
David M. Furay - Boulder CO
Steven B. Volk - Boulder CO
Michael R. Utenick - Englewood CO
James A. Dunckley - Boulder CO
John H. Blagaila - Boulder CO
James F. Hopper - Louisville CO

Assignee:

Integral Peripherals - Boulder CO

International Classification:

G11B 3314

US Classification:

360 9702

Abstract:

Disclosed is a disk drive information storage device which includes a disk for recording and reproducing information, with the disk drive information storage device having a housing with a baseplate which includes a peripheral portion having a lip which extends circumferentially around the peripheral portion and the cover also includes a peripheral portion with a free edge at the periphery of the cover such that when the baseplate is engaged with the cover the overlap of the free edge of the baseplate and the free edge of the lip provides shielding to the internal components of the disk drive from electromagnetic interference, which my be present in the environment in which the disk drive is utilized. The disk utilized in the disk drive has a diameter in the range of from about 45 mm to about 50 mm. The housing of the disk drive has a first external dimension of about 51 mm and a second external dimension of about 70 mm.

US Patent:

55262023, Jun 11, 1996

Filed:

Jun 7, 1995

Appl. No.:

8/482535

Inventors:

John H. Blagaila - Boulder CO
James F. Hopper - Louisville CO
Michael R. Utenick - Englewood CO

Assignee:

Integral Peripherals, Inc. - Boulder CO

International Classification:

G11B 5546

US Classification:

360 7708

Abstract:

An embedded servo system for a disk drive is disclosed. An asymmetrical position sub-field reduces the overhead of the disk position system. The sub-field includes at least two normal frame pairs and only one quadrature frame pair interleaved with one of the normal pairs to form the asymmetrical position sub-field. The prerecorded embedded servo information in each track of the disk includes a multiplicity of different length servo fields, i. e, each track includes at least two types of servo fields where the first type has a first length and the second type has a second length that is different from the first length. The length of a servo field refers to the number of prerecorded bytes in the servo field. The multiplicity of different length servo fields includes a first type having a full track address sub-field and a second type having a modulo track address sub-field in place of the full track address sub-field. In another embodiment, the multiplicity of different length servo fields includes the first and second types of servo fields and a third type of servo field.

US Patent:

57680493, Jun 16, 1998

Filed:

Aug 12, 1996

Appl. No.:

8/695739

Inventors:

James H. Morehouse - Jamestown CO
John H. Blagaila - Boulder CO
James A. Dunckley - Boulder CO

Assignee:

Integral Peripherals, Inc. - Boulder CO

International Classification:

G11B 5012
G11B 1700
G11B 3314

US Classification:

360 9701

Abstract:

A disk drive apparatus, by using an integrated base structure made up of a base portion and a printed circuit board, and an integrated cover structure made up of a cover casting and a printed circuit board, is able to achieve an overall thickness of 5 millimeters, so that such disk drive apparatus can meet the current PCMCIA card standard for Type II cards.

US Patent:

55372708, Jul 16, 1996

Filed:

Feb 22, 1995

Appl. No.:

8/394550

Inventors:

James H. Morehouse - Jamestown CO
David M. Furay - Boulder CO
John Blagaila - Boulder CO
F. Eugene Dion - Longmont CO
Scott A. Shelstad - Longmont CO
Jimmy L. Woods - Arvada CO

Assignee:

Conner Peripherals, Inc. - San Jose CA

International Classification:

G11B 3314

US Classification:

360 9702

Abstract:

The present invention provides a disk drive apparatus for use in computer systems and especially in computer systems where size and weight are of paramount concern, such as lap top computer systems. The preferred embodiment of the disk drive apparatus includes a 21/2" magnetic disk that preferably provides 20 to 40 megabytes of storage within a foot print area of approximately 2. 8 inches by approximately 4. 0 inches. Further, the disk drive apparatus possesses a height dimension of 0. 630 inches or less. This height dimension is achieved, in part, by providing a low profile spin motor to rotate the magnetic disk. The low profile spin motor uses high energy magnets that are preferably made of a material that includes a rare earth, such as neodymium or samarium. The disk drive apparatus also employs a rotary actuator having a voice coil assembly of reduced height that is achieved by using the housing as a flux return path for magnet fields produced by the voice coil assembly. The present invention also provides an improved ambient filter that reduces the penetration of ambient water vapor into the housing of the disk drive apparatus.

US Patent:

52315495, Jul 27, 1993

Filed:

Aug 30, 1990

Appl. No.:

7/571558

Inventors:

James H. Morehouse - Jamestown CO
Thomas L. Andrews - Ward CO
John H. Blagaila - Boulder CO
David M. Furay - Boulder CO
Terry G. Johnson - Longmont CO
H. Ross Chessman - Erie CO

Assignee:

Conner Peripherals, Inc. - San Jose CA

International Classification:

G11B 554

US Classification:

360 75

Abstract:

A disk drive apparatus is disclosed for primary use with portable, laptop or other information storage systems. The disk drive apparatus includes one or more about 2. 5 inch hard disks. A rotary actuator is utilized and includes an arm assembly having a cam follower member for use in dynamically loading/unloading read/write head(s). The cam follower member moves along a ramp, which forms a cam surface, for loading/unloading. The spin motor assembly of the disk drive apparatus includes rotor having a clamp ring that enables a more powerful spin motor to be incorporated, as well as facilitating and enhancing the connection of the hard disks to the spin motor. The disk drive apparatus also includes servo electronics responsive to a back emf generated signal for use in the servo operation, which use has the potential to increase the servo bandwidth. The accuracy of the servo operation is also enhanced by the use of a flexible circuit that prevents unwanted torque from being applied to the actuator during operation. The disk drive electronics also includes hardware and software for reducing power consumption.

US Patent:

54573653, Oct 10, 1995

Filed:

Dec 4, 1992

Appl. No.:

7/985379

Inventors:

John H. Blagaila - Boulder CO
Michael R. Utenick - Niwot CO
Steven B. Volk - Boulder CO

Assignee:

Integral Peripherals, Inc. - Boulder CO

International Classification:

G11B 1904

US Classification:

318430

Abstract:

A computer having a hard disk drive includes a battery voltage monitor which establishes a shut down condition of the computer if the supply voltage falls below a chosen level V. sub. L. Upon start up of the hard disk drive motor, current through the motor is limited so that supply voltage of the battery to a computer does not fall below level V. sub. 1, which level is greater than the level V. sub. L. Additionally during start up, current in the motor is controlled so that voltage supplied by the battery to the computer does not rise above a threshold level V. sub. 2 which is greater than V. sub. 1.

US Patent:

54596238, Oct 17, 1995

Filed:

Nov 9, 1993

Appl. No.:

8/150322

Inventors:

John H. Blagaila - Boulder CO
James F. Hopper - Louisville CO
Michael R. Utenick - Englewood CO

Assignee:

Integral Peripeherals, Inc. - Boulder CO

International Classification:

G11B 5596

US Classification:

360 7708

Abstract:

In an embedded servo system for a disk drive, prerecorded servo information in each track of the disk includes a multiplicity of different length servo fields. Each track includes at least two types of servo fields where the first type and the second type have different lengths. The length of a servo field refers to the number of prerecorded bytes in the servo field. The multiplicity of different length servo fields includes a first type having a full track address sub-field and a second type having a modulo track address sub-field in place of the full track address sub-field. One embodiment includes the first and second types of servo fields and a third type of servo field. The third type of servo field includes only track following information and no track address information. The servo fields of differing lengths are interleaved in each track of the disk. The servo fields are chosen to provide a high seek sampling rate in comparison to the required performance and a reduction in the servo overhead.

US Patent:

58726691, Feb 16, 1999

Filed:

Jun 7, 1995

Appl. No.:

8/473726

Inventors:

James H. Morehouse - Jamestown CO
Thomas L. Andrews - Ward CO
John H. Blagaila - Boulder CO
David H. Furay - Boulder CO
Terry G. Johnson - Longmont CO
H. Ross Chessman - Erie CO

Assignee:

Seagate Technology, Inc. - Scotts Valley CA

International Classification:

G11B 1518

US Classification:

360 69

Abstract:

A disk drive apparatus is disclosed for primary use with portable, laptop or other information storage systems. The disk drive apparatus includes one or more about 2. 5 inch hard disks. The disk drive apparatus also has electronics, including hardware and software, for detecting a lapse of first and second predetermined time intervals since a last disk access. The disk drive apparatus also includes power conservation means which power down a first portion of disk drive components after a first predetermined time interval has elapsed and for powering down a second portion of disk drive components after a second predetermined time interval has elapsed.