Compositions: coating or plastic – Coating or plastic compositions – Proteinaceous material containing
Patent
1979-09-10
1981-07-14
Hearn, Brian E.
Compositions: coating or plastic
Coating or plastic compositions
Proteinaceous material containing
106DIG2, 106110, 52317, 52380, 52383, 174104, 252 62, 427403, 264 69, 264333, C04B 1100, E04B 174
Patent
active
042784689
ABSTRACT:
Electrical power, instrument and communication cables constructed with combustible coverings can provide a pathway by which fire might spread. Cable fires within a room or compartment can be arrested by the construction of a properly designed "fire break" placed periodically along a cable run; and cable fire spread between rooms can be arrested by a properly placed "fire stop". Cable runs generally include a cable tray or raceway to contain the cables. An effective fire barrier, e.g., "fire break" or "fire stop" may be constructed in such a cable tray or raceway by filling a portion of the tray or raceway with a gypsum composition comprising gypsum plaster, an inert filler mixture of diatomaceous earth and lightweight expanded aggregate, and very small amounts of glycerin, boric acid and a corrosion inhibitor such as a boron nitride, boron nitrile or mixture of such boron compounds. The fire barrier is formed by placing in a portion of the cable tray/raceway an aqueous slurry of the plaster composition as described above, slurried with water in amounts of about 10 pounds of the plaster composition and 14-16 pounds of water to form a " pseudo-plastic" mass, and filling all of the voids around and beneath cables therein by applying force to the cable tray/raceway, e.g., as by hammering with a rubber mallet.
REFERENCES:
patent: 1380398 (1921-06-01), Lougheed
patent: 3393116 (1968-07-01), Larson
patent: 3454456 (1969-07-01), Wilbey
patent: 3819388 (1974-06-01), Cornwell
patent: 3839059 (1974-10-01), Rothfelder
patent: 3966479 (1976-06-01), Koblitz
patent: 3980437 (1976-09-01), Akabayashi
patent: 4148660 (1979-04-01), Lankard
Quigg Paul S.
Reily William S.
Selbe Rexford L.
Waropay Vincent M.
Hearn Brian E.
Kurlandsky S.
Roberts Kenneth E.
Robinson Robert H.
United States Gypsum Company
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