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:
Mar. 17, 1981
Filed:
Aug. 13, 1979
Sidney J Schwartz, Vista, CA (US);
Burroughs Corporation, Detroit, MI (US);
Abstract
A bubble (domain) generator comprising a pair of relatively long elements of suitable magnetic material, such as permalloy, separated by a narrow gap, near which bubbles will be generated in the bubble film by the combined effect of local in-plane and perpendicular magnetic field components to assist in nucleation. In one embodiment, the gap is formed straight by spaced apart edges between the elements and, in another embodiment, the gap is formed to define an apex by V-shaped by complementary tapered spaced apart edges between the elements. Both embodiments may have their gap edges brought close to the bubble film and may have a current carrying hairpin loop conductor substantially surrounding the gap to assist in nucleation.