The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 14, 1978
Filed:
Jan. 31, 1977
Magid Y Dimyan, San Diego, CA (US);
Burroughs Corporation, Detroit, MI (US);
Abstract
A bubble lattice file comprising a plurality of propagate elements of magnetic film material positioned as an overlay over bubble supporting material with each element spaced from the bubble material such that a spacing gradient is formed between the element and the bubble material in the direction of the bubble propagation path. The elements comprising the main lattice memory file are arranged to support a hexagonal lattice of bubbles with one bubble propagation path in the form of rows and the other propagation path comprising accessing channels in the form of spaced apart columns. Utilizing the translation force on a bubble domain produced by the spacing gradient between the magnetic film and the bubble material, all bubbles in the lattice may be translated along the rows by a monopolar magnetic field applied in the row direction and when accessing is required, a monopolar field in the column direction is applied and all bubbles in equilibrium in the element of the rows which intersect the columns will move to the elements of the accessing channels and along its elements upon the continued application of the field ultimately exiting into a reading station. Concurrently, the read data may be reentered into the lattice at the entrance end of the columns.