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. 08, 1981
Filed:
Jan. 11, 1980
Applicant:
Inventor:
Neal H Thorsten, Lebanon, NJ (US);
Assignee:
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E04B / ; E04C / ;
U.S. Cl.
CPC ...
52221 ; 52232 ; 52227 ; 174 48 ;
Abstract
A cable penetration matrix structure comprises a plurality of individual penetration cells ganged together to form a matrix. A sheath or shroud is added to each penetration cell in use to extend the length of the passageway. Each penetration cell is designed to permit cable passage therethrough in bundles and operates as a self-contained entity. Intumescent cards are inserted between layers of cable to provide a fire stopping seal. Each cell is opened for use as needed and unused cells may be tiled over as part of the floor. The cells are made of a cementitious material and may be reused in the event of a fire.