Electricity: conductors and insulators – Electric shock hazard protective devices – Shock protection – grounding devices
Patent
1996-07-31
1998-05-19
Kincaid, Kristine L.
Electricity: conductors and insulators
Electric shock hazard protective devices
Shock protection, grounding devices
174 93, H01B 300
Patent
active
057538549
ABSTRACT:
A device and method are provided for installing fire-proof material quickly and easily. The fire-proof material, once installed, inhibits the spread of igniting material across an annular space surrounding an object. A device according to the invention includes a blanket made of a fire-resistant material. In a preferred embodiment, this material is silica fabric. A plurality of ribs are attached at spaced-apart locations along the length of the blanket, each rib extending substantially the width of the blanket. Each rib, in a first condition, permits one side of the blanket to be brought into contact with the object, and in a second condition, holds the blanket in place around the object. The ribs are preferably snap strips that have two stable orientations: an extended stable orientation, which corresponds to the first condition, and a curled stable orientation, which corresponds to the second condition. When the blanket is bent along its length while the snap strips are in their extended stable orientation, the snap strips tend to assume the curled stable orientation. The snap strips are preferably formed from metal on which two opposing stresses are imparted. One stress causes the snap strip to curl along its length and causes the blanket to wrap around the object (e.g., the cable splice) being covered by the blanket. The other stress causes the snap strip to have a cupped cross-section while in the extended orientation. This cupped cross-section curves in a direction opposed to the curling and thus towards the side of the blanket away from the object. In a preferred embodiment, the fire-proof material may also be easily removed.
REFERENCES:
patent: 1224970 (1917-05-01), Singer
patent: 2229849 (1941-01-01), Heidebrecht
patent: 3410023 (1968-11-01), Anello
patent: 5038693 (1991-08-01), Kourtides et al.
patent: 5277959 (1994-01-01), Kourtides et al.
patent: 5310594 (1994-05-01), Holland et al.
Richards William J.
Whipple Sherman T.
Cuneo Kamand
Kincaid Kristine L.
Polytrap Co. Inc.
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