Electricity: conductors and insulators – Overhead – Towers – poles or posts
Patent
1978-11-15
1981-06-09
Murtagh, John E.
Electricity: conductors and insulators
Overhead
Towers, poles or posts
52221, 52232, H02G 1504
Patent
active
042726433
ABSTRACT:
A fire resistant fitting including a pair of plates having a fire rated expandable material therebetween and a pair of conduits extending from each plate with one conduit of each pair in alignment with a respective conduit of the other pair and a respective passage in the expandable material to extend separate power and communication connections through a floor. Threaded members extend from one plate through the other plate for squeezing the expandable material against the sides of the floor opening in which the fitting is located and stops on the threaded members prevent the application of excessive force to the material.
REFERENCES:
patent: 1851939 (1932-03-01), Williams
patent: 1851940 (1932-03-01), Williams
patent: 3655907 (1972-04-01), Philibert
patent: 3965629 (1976-06-01), Pearsons
patent: 4061344 (1977-12-01), Bradley
patent: 4091231 (1978-05-01), Sotolongo
Carroll James C.
Chapman Donald L.
Flee Stephen L.
McGoldrick Gilbert A.
Golden Larry I.
Guttman Richard T.
Lesser Norton
Murtagh John E.
Square D Company
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