Browse Prior Art Database

Magnetic Shield Assembly

IP.com Disclosure Number: IPCOM000086554D
Original Publication Date: 1976-Sep-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Dickie, HG: AUTHOR [+2]

Abstract

Fig. 1 shows a side view of a stack of three disks 1 with magnetic shields 2 (described in the article "Magnetic Shield for Disk File" by J. F. Elliott, I. C. George and A. R. Hearn, appearing at pages 1437-1438 of this issue) accurately positioned over each of the surfaces of the disks. Sufficient clearance must be given between the disk surface and shield to enable the associated record/playback head (not shown) to perform access operations over the disk surface unimpeded. Each shield 2 is held over the surface of the disks between a pair of clamping members 3. Each pair of clamping members consists of a relatively rigid member 4 and a thinner, and therefore, less rigid member 5.

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Magnetic Shield Assembly

Fig. 1 shows a side view of a stack of three disks 1 with magnetic shields 2 (described in the article "Magnetic Shield for Disk File" by J. F. Elliott, I. C. George and A. R. Hearn, appearing at pages 1437-1438 of this issue) accurately positioned over each of the surfaces of the disks. Sufficient clearance must be given between the disk surface and shield to enable the associated record/playback head (not shown) to perform access operations over the disk surface unimpeded. Each shield 2 is held over the surface of the disks between a pair of clamping members 3. Each pair of clamping members consists of a relatively rigid member 4 and a thinner, and therefore, less rigid member 5.

The relatively rigid member 4 is shown (Fig. 2) with a shield located between two pads 6 and 7, formed by relieving away parts of the surface of the member. Pads 6 and 7 are so shaped to prevent lateral withdrawal of the shield 2. Each shield 2 is provided with two spring lugs 8 and 9 which are sprung against the relieved floor of the member 4, and when the two members 4 and 5 are assembled, provides a force to bias the shield 2 against the flat surface of the member 5. Since the plane of this surface is defined by the precision flatness of the part, the plane of the shield 2 is also accurately defined. A further machined land 10 on the member cooperates with the member 5 to provide a "pinch" clamp for the shield 2. As can be seen from Fig. 1, the shield assemb...