Electricity: conductors and insulators – Overhead – Towers – poles or posts
Patent
1983-03-18
1985-01-29
Grimley, A. T.
Electricity: conductors and insulators
Overhead
Towers, poles or posts
52221, 411523, H02G 322
Patent
active
044967900
ABSTRACT:
A self-anchoring poke-thru wiring device for the extension of communication and/or electrical wiring through a passage in a floor designed to prevent the spread of fire from one side of the floor to the other and facilitate ready installation and removal of the device from above the floor opening. The device includes a pair of upper conduit portions aligned with a pair of lower conduit portions and a plurality of fire resistant expandable disks retained between an upper and a lower plate intermediate the pairs of conduit portions, the disks and plates including aligned apertures with the conduit portions providing separate wireway channels. The upper conduit portions lead into an outlet box via a floor plate. A pair of generally V-shaped resilient retaining members are removably secured to opposite sides of the upper plate. Each retaining member includes a base leg which is removably secured by a screw to the upper plate and a retaining leg which includes a generally V-shaped notch providing a pair of barbs at the distal end of each leg which extend radially outward past the periphery of the upper and lower plates a sufficient distance to retain the assembly within a floor opening upon insertion. The floor plate of the outlet box includes a plurality of openings aligned with the notches and retaining screws to permit release of the retaining members from above the floor through the floor plate facilitating ready removal of the device from above the floor.
REFERENCES:
patent: 3803341 (1974-04-01), Klinkman et al.
patent: 4264779 (1981-04-01), Rhodes et al.
patent: 4272643 (1981-06-01), Carroll et al.
patent: 4323724 (1982-04-01), Shine
Golden Larry I.
Grimley A. T.
Guttman Richard T.
Square D Company
Tone D. A.
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