Browse Prior Art Database

Rotary Driver and Stabilizer

IP.com Disclosure Number: IPCOM000097440D
Original Publication Date: 1962-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Khoury, HA: AUTHOR

Abstract

This rotates, supports and stabilizes a flexible disc without the use of motors, spindles, or centering devices.

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Rotary Driver and Stabilizer

This rotates, supports and stabilizes a flexible disc without the use of motors, spindles, or centering devices.

In the upper drawing, the flexible disc 1 is placed between a lower doughnut- shaped air bearing element 2, fixed to a base plate 3, and an upper doughnut- shaped air bearing element 4. The upper element 4 is supported, when no air is applied to the device, by pins 5 fixed to the base plate 3. For each pin 5, there is corresponding depression 6 in the peripheral flange of the upper element 4. When air is applied to the system, element 4 floats free. Pressurized air is applied to manifolds 7 and 8 formed in the elements 2 and 4, respectively. The flat bearing surfaces 9 sandwiching flexible disc 1 are connected to the manifolds by at least one ring of equally spaced capillaries 10. These are angled perpendicular to the bearing surfaces.

In addition to this ring of capillaries, at least one of the bearing surfaces also has a second ring of equally spaced capillaries 11. These are angled such that they can be represented by a three-dimensional, e.g., a 45 degrees, vector in space. The arrangement of these two rings of capillaries is shown in sectional view A-A of the lower bearing surface. A component V(z) of the air jets issuing from the second ring of capillaries drives the disc at a constant speed at a given pressure. Component V(y) provides hydrostatic air lubrication similar to that provided by the first ring of capillari...