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Browse Prior Art Database

Device for Magnetically Recording a Timing Disk

IP.com Disclosure Number: IPCOM000094045D
Original Publication Date: 1966-May-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Braun, RE: AUTHOR [+2]

Abstract

The jig is for recording on the outer surface of a magnetic timing disk 16 which, for example, can be used for speed or position control of servo shaft 23. Before recording the magnetic pattern on disk 16, it is placed onto plate 11 fixed to the bottom of U-shaped frame 10.

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Device for Magnetically Recording a Timing Disk

The jig is for recording on the outer surface of a magnetic timing disk 16 which, for example, can be used for speed or position control of servo shaft 23. Before recording the magnetic pattern on disk 16, it is placed onto plate 11 fixed to the bottom of U-shaped frame 10.

Masking plate 13 is placed on top of disk 16 in alignment with it. Plate 13 has a plurality of slots 14 formed through it at the positions where bits are to be recorded on the disk surface. Plate 13 is made from magnetic material such as iron or steel. Concentrically supported above plate 13 is supporting plate 12 fixed to shaft 17. The latter passes through the upper side of frame 10 terminating at a handle 18. Spring 19 normally biases handle 18 and plate 12 to an upward position above plate 13. Track 20 is concentrically provided around disk 12 so that permanent magnet 21 can be manually rotated along track 20.

In a disk recording operation, handle 18 is pushed downwardly so that plate 12 meets plate 13. While they engage, the concentric alignment of all members is checked. Then magnet 21 is moved around its 360 degrees path. Disk 16 is then magnetized with bits located on its portions adjacent to its respective slots
14. This is due to the flux from magnet 21 acting on disk 16 through plate 13.

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