John M Gorres, 838347 Narcissus St, Victoria, MN 55386
John Gorres Phones & Addresses
Victoria, MN
8690 81St St, Cottage Grove, MN 55016 651-4593514
South Padre Island, TX
Hastings, MN
McAllen, TX
San Pedro, TX
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Us Patents
Method Of Improving The Operation Of A Single Wall Domain Memory System
US Patent:
4149265, Apr 10, 1979
Filed:
Apr 11, 1977
Appl. No.:
5/786317
Inventors:
John M. Gorres - Cottage Grove MN
Marlin M. Hanson - Cologne MN
Roger E. Lund - Woodbury MN
Marlin M. Hanson - Cologne MN
Roger E. Lund - Woodbury MN
Assignee:
Sperry Rand Corporation - New York NY
International Classification:
G11C 1908
US Classification:
365 2
Abstract:
A method of and an apparatus for improving the selective positioning of single wall domains or bubble domains in a bubble domain memory system is disclosed. The method includes the use of slotted intersecting digit and word drive lines that form memory areas, each memory area being defined by the inside opposing edges of the slotted drive lines at each intersection. Each memory area has four quadrants, three of which are effectively optically blocked by an opaque shield--a bubble domain in the one unblocked quadrant provides the desired Faraday rotation of a plane polarized coherent light beam to generate a beamlet that is optically detected as a binary digital signal. The slotted drive lines are formed below the surface of the bubble domain supporting layer whereby the so-provided magneto static barriers prevent bubble domain sticking in a selected one quadrant of the four quadrants of the memory area and prevent bubble domain escape from the memory area itself.
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