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Browse Prior Art Database

Spherical Spherical Air Bearing Contour Design

IP.com Disclosure Number: IPCOM000083613D
Original Publication Date: 1975-Jun-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Albrecht, DW: AUTHOR [+3]

Abstract

An air bearing head for a flexible medium Includes a contoured section 10 having a major spherical portion 12, and a second spherical portion 14 at the leading edge of the head which provides a convergence channel. The radii of the two spheres are the same, whereas the center of curvature of the second sphere is displaced from that of the primary sphere. The degree of the offset defines the intersection angle between the two surfaces.

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Spherical Spherical Air Bearing Contour Design

An air bearing head for a flexible medium Includes a contoured section 10 having a major spherical portion 12, and a second spherical portion 14 at the leading edge of the head which provides a convergence channel. The radii of the two spheres are the same, whereas the center of curvature of the second sphere is displaced from that of the primary sphere. The degree of the offset defines the intersection angle between the two surfaces.

For a relative velocity of 1000 IPS, the effective limit for the intersection angle is between 0.5 and 3.5 degrees. These limits will change for other relative velocities. The design value for the convergence channel intersection angle is independent of the boundary conditions into the contour.

These tape conditions in the near vicinity of the contour can be accurately characterized for a variety of hardware designs that can be used to support the tape. With this design, a hydrodynamic air bearing is obtained, and substantially uniform spacing is achieved between the head and a magnetic tape 16. The design is applicable for any system involving high-relative velocity between a magnetic head and a flexible magnetic medium. The head configuration may be a major spherical/ spherical, minor spherical/spherical, or double spherical/spherical.

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