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:
Dec. 16, 1980
Filed:
Feb. 08, 1979
Peter J Tamburro, Hanover Township, Morris County, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
An arrangement for keying plug-in circuit boards and their receptacles such that a board cannot be inserted into an incorrect receptacle. First and second projections (FIG. 1:10, 11) are located on a board (1) at ones of a plurality of first and second encoded locations (FIG. 2:A-D and A'-D'). The locations are proximate to and parallel to one edge of the board associated with a receptacle guide rail (FIG. 1:2). The guide rail contains first and second stops (12, 13) associated individually with the first and second projections. The initial projection (10) to enter the receptacle during board insertion and the initial stop (13) encountered by the initial projection and associated with the other projection (11) are dimensionally offset with respect to each other so that the initial projection bypasses the initial stop.