Insert device for cables
US3995102A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1974 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Jan 25, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02G3/185
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention relates to an insert device for cables adapted to be positioned in structural openings, such as, for example in holes drilled into or formed in floors and other planar surfaces of structures such as buildings, to facilitate connection of power lines, cables and wires from a source into a cable receiving junction box at the underside of the floor and through the insert device and thence to a service head at the upper face of the floor, for connection of various accessory devices thereto, fire retarding means being provided to seal the device in said floor opening and to seal said cables therein, said fire retarding means automatically foaming to effectuate the sealing action described, on occurrence of fire or excessive temperatures, to effectively so seal the assembly. The cables on such occurrence, are thus sealed in said insert device in air-tight, spaced relation to each other; spread of fire and excess heat therethrough will be automatically prevented, and the fire protective rating of the floor wherein the insert device is so mounted and used will be substantially equivalent to the original rating of the floor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.