Frank C Bumb Deceased740 Orange Grove Blvd, Pasadena, CA 91105
Frank Bumb Phones & Addresses
740 Orange Grove Blvd, Pasadena, CA 91105
Los Altos, CA
Duarte, CA
Sunnyvale, CA
Mentions for Frank C Bumb
Publications & IP owners
Us Patents
Method Of Reading And Writing Data Transitions On Side-By-Side Tracks On Magnetic Media
US Patent:
5293281, Mar 8, 1994
Filed:
Apr 8, 1992
Appl. No.:
7/865621
Inventors:
Michael I. Behr - Pasadena CA
Frank C. Bumb - Sunnyvale CA
Frank C. Bumb - Sunnyvale CA
International Classification:
G11B 5584
G11B 5596
G11B 5596
US Classification:
360 7707
Abstract:
A track means defined by magnetic recording media on a substrate, the media along the track means having two levels, one for recording of data, and the other for recording of servo information, wherein recorded magnetic transitions at the second level define the servo information, the transitions arrayed along the track means as groups of converging lines which extend in crosswise or spanwise relation to multiple tracks. The data is recorded without any wasted magnetic space between tracks (zero guardband) using alternating angles (azimuthal) of magnetic orientation so that they do not interfere with each other when read. The read head cores or gaps may be "oriented" to read recorded data transitions extending at different angles relative to track length direction.
Systems Using Superimposed, Orthogonal Buried Servo Signals
US Patent:
5321570, Jun 14, 1994
Filed:
Apr 27, 1992
Appl. No.:
7/874527
Inventors:
Michael I. Behr - Pasadena CA
Frank C. Bumb - Sunnyvale CA
Frank C. Bumb - Sunnyvale CA
International Classification:
G11B 5265
US Classification:
360121
Abstract:
A track means defined by magnetic recording media on a substrate, the media along the track means having two levels, one for recording of data, and the other for recording of servo information, wherein recorded magnetic transitions at the second level define the servo information, the transitions arrayed along the track means as groups of converging lines which extend in crosswise or spanwise relation to multiple tracks. The data is recorded without any wasted magnetic space between tracks (zero guardband) using alternating angles (azimuthal) of magnetic orientation so that they do not interfere with each other when read. The read bead cores or gaps may be "oriented" to read recorded data transitions extending at different angles relative to track length direction.
System Using Superimposed, Orthogonal Buried Servo Signals
US Patent:
5223994, Jun 29, 1993
Filed:
Apr 8, 1992
Appl. No.:
7/865696
Inventors:
Michael I. Behr - Pasadena CA
Frank C. Bumb - Sunnyvale CA
Frank C. Bumb - Sunnyvale CA
International Classification:
G11B 5584
US Classification:
360 7712
Abstract:
Magnetic head structure is operated to record both servo magnetic transitions, and data magnetic transitions, in magnetic media, the servo transitions buried relative to the data transitions, the servo transitions recorded along bands and the data transitions recorded along side-by-side tracks, the bands being wider than the data tracks, the data transitions having lateral lengths greater than track width. The magnetic head structure typically employs multiple magnetic flux servo write gaps, including a leading first gap extending at one angle. alpha. and a trailing second gap extending at an angle. beta. , relative to the direction of travel of the media past the head structure, the first and second flux gaps spaced and positioned to span multiple of the data tracks.
Systems Using Superimposed, Orthogonal Buried Servo Signals
US Patent:
5132861, Jul 21, 1992
Filed:
Feb 26, 1990
Appl. No.:
7/485060
Inventors:
Michael I. Behr - Pasadena CA
Frank C. Bumb - Sunnyvale CA
Frank C. Bumb - Sunnyvale CA
International Classification:
G11B 5265
US Classification:
360121
Abstract:
A track means defined by magnetic recording media on a substrate, the media along the track means having two levels, one for recording of data, and the other for recording of servo information, wherein recorded magnetic transitions at the second level define the servo information, the transitions arrayed along the track means as groups of converging lines which extend in crosswise or spanwise relation to multiple tracks. The data is recorded without any wasted magnetic space between tracks (zero guardband) using alternating angles (azimuthal) of magnetic orientation so that they do not interfere with each other when read. The read head cores or gaps may be "oriented" to read recorded data transitions extending at different angles relative to track length direction.
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