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:
Sep. 23, 1980
Filed:
Feb. 08, 1979
Peter J Tamburro, Hanover Township, Morris County, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A keying arrangement is disclosed for circuit boards (FIG. 1:1) and receptacles (2, 3, 4) to prevent the insertion of boards into any but correct receptacles. The two guide rails (2, 3) of a circuit board receptacle aggregately comprise at least two spring devices (13, 37) located at prescribed coded locations (A through H, A' through H') along the guide rails. Each spring device comprises a projection (15) and each board contains indentations (FIG. 1:17, FIG. 2:22) associated individually with different ones of the projections. The indentations are located on the board such that one receives its associated projection during insertion of an incorrect type of board to prohibit further insertion.