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:
Feb. 19, 1991
Filed:
Nov. 15, 1989
Roland W Rubertus, Hudson, WI (US);
Roger K Westerberg, Cottage Grove, MN (US);
Peter J Zarembo, Shoreview, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A universal lattice assembly for use in a magnetic type electronic article surveillance system is disclosed which comprises a frame formed of two identical molded plastic half-shells, a metal chassis within which specific electronic sub-assemblies may be positioned and a coil assembly including a drive coil and a sense coil. The housing is adapted to enclose and to interlock and index the chassis, while also rigidly anchoring the coil assembly within an extensive cavity to prevent unwanted movement of the coil. A null adjustment mechanism within the frame enables a slight precise displacement of a coil to enble nulling of the two coils with respect to each other. Upon insertion of the coil assembly and chassis within the half-shells, the two are permanently pinned and bonded together to form an exceptionally rigid and durable composite lattice.