Browse Prior Art Database

Magnetic Storage Device

IP.com Disclosure Number: IPCOM000096414D
Original Publication Date: 1963-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Bruce, GD: AUTHOR

Abstract

In magnetic element 1, there are two spaced apart apertures 2 and 3 which divide it into three separate vertical legs 4, 5 and 6. Winding 7 is threaded through apertures 2 and 3, respectively, in opposite directions to control the magnetic flux in central leg 5. Winding 8 is threaded through apertures 2 and 3 in the same direction to control the magnetic flux in legs 4 and 6.

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Magnetic Storage Device

In magnetic element 1, there are two spaced apart apertures 2 and 3 which divide it into three separate vertical legs 4, 5 and 6. Winding 7 is threaded through apertures 2 and 3, respectively, in opposite directions to control the magnetic flux in central leg 5. Winding 8 is threaded through apertures 2 and 3 in the same direction to control the magnetic flux in legs 4 and 6.

Bipolar driver 9 connected to winding 7 and a bipolar driver 10 connected to winding 8 are selectively operable for passing current pulses through 7 and 8 in either direction. In the absence of any other fields, the flux produced in leg 5 by the current in winding 7 divides equally between the other legs 4 and 6.

Winding 8 is threaded through one of the apertures in the same direction as winding 7 and through the other aperture in the opposite direction. For any combination of current polarities in windings 7 and 8, the field produced by winding 8 aids the field of winding 7 in one of the legs 4 or 6. It opposes it in the other to create a more favorable path for the center leg flux around one aperture the around the other. The two flux configurations can be employed to represent stored binary values.

Information stored in magnetic element 1, in terms of the remanent flux patterns, can be retrieved by application of current in opposite direction to winding 7. When the element 1 is switched for this interrogation process, voltages of one or the opposite polarity are in...