Sirjang L Tandon

41603150, Jul 10, 1979

Apr 17, 1978

5/896635

Sirjang L. Tandon - Northridge CA
John P. Moon - Thousand Oaks CA

Tandon Magnetics Corporation - Chatsworth CA

G11B 542

29603

In methods of making head assemblies, a ceramic slider having a row of receiving apertures is united with a multiple serial ferrite arch structure shaped in complementary fashion so that successive arches thereof register within the apertures to define erase pole pieces. The face of the resulting assembly is ground flat and parallel to the arch base and the bridges thus formed on the base side may be separated between the arches. The assembly is then bisected along the row of pole pieces into complementary halves, and the facing surfaces are ground and lapped to provide a desired width for the erase member formed by the pole piece half and associated leg of one of the ferrite arches. Grooves are cut into the bisected surfaces at the pole pieces to define the erase track width and the erase gap length for the erase member. A read/write magnetic head structure is separately batch fabricated in the form of core strips, with side faces that are precisely parallel and smooth, and this is unified in a magnetic head assembly between pairs of opposite erase members embedded in the slider halves.

48335541, May 23, 1989

Feb 25, 1987

7/018499

Warren L. Dalziel - Monte Sereno CA
Stephen L. Deremer - Scotts Valley CA
Michael T. Dugan - Thousand Oaks CA
Charles D. Flanigan - San Jose CA
Martin J. Maiers - Ben Lomond CA
David P. Moriconi - Ben Lomond CA
Charles I. Peddle - Scotts Valley CA
Peter Sehnal - La Honda CA
Glenn M. Stark - Santa Cruz CA
Kenneth M. Stein - San Jose CA
Sirjang L. Tandon - Chatsworth CA
Robert G. Taylor - Santa Cruz CA
Gary R. Yeakle - San Jose CA

Tandon Corporation - Moorpark CA

G11B 5012

360 9804

A portable hard disk drive module enclosing all of the operative components of the disk drive is removably received by a receptacle in a microcomputer system. The disk drive module and the receptacle each have an electrical connector and these connectors are coupled when the module is in an operating position within the receptacle. The connectors comprise the sole interface between the operative components of the disk drive and the remainder of the computer system. The receptacle includes a transport mechanism for moving the module from a load position to the operating position and from the operating position to a module unload position. Accordingly, movement of the module between these positions in the receptacle is completely under machine control.

41515730, Apr 24, 1979

Jun 13, 1977

5/805731

Sirjang L. Tandon - Northridge CA
Alfred C. Hackney - Simi Valley CA
Roy A. Applequist - Sunnyvale CA

Tandon Magnetics Corp. - Chatsworth CA

G11B 558

360104

In a data storage system using a non-rigid magnetic storage surface, such as a floppy disc, and in which recording and reproduction are to be effected on both sides of the element by contact transducers, significant improvements over prior art devices are realized by employing a fixed transducer on one side of the element, and a movable transducer element on the opposite side. The movable transducer may be gimbal mounted on a pivoted spring-loaded arm of low mass and high stiffness to urge the magnetic storage surface against the fixed transducer with a light force. The force is adequate, together with a slight penetration of the fixed transducer into the plane of the disc, to correct deflections of the storage surface in directions transverse to its principal plane in the region between the transducers. Thus the transducers are maintained in operative relation for maximum flux interchange, but without introducing undue wear or requiring a long head settling time.