GB324749A - Improvements in or relating to fire-extinguishing apparatus - Google Patents

Abstract

324,749. Rutledge, P. V. Nov. 24, 1928. Fire-extinguishing by liquid mixtures; extincteurs.-A device for mixing a fireextinguishing liquid, for example one of a volatile character, with the liquid flowing from a fire-extinguishing appliance, consists of an outer casing 6 housing a sealed receptacle 13. The receptacle is of annular form, and a spindle 11 passing through the central passage 14 carries a valve 16 controlling outlets 15 in the bottom of the receptacle. The lower part of the casing is formed as a passage-way below a wire gauze 17. In use, the valve 16 is opened, allowing the volatile liquid to fall down into the passage-way where it mixes with the liquid entering from the extinguishing appliance by a port 7 and escaping by a port 8. The outlets 15 may be sealed by a metal capsule, instead of by a valve, depression of the spindle 11 then tearing off the capsule. A series of outlets in line may be closed by separate capsules, which are all torn off by a bar passing below the receptacle. As shown, the device, with its receptacle charged with methyl bromide, is inserted in the discharge pipe 5 of a foam fire-extinguisher 1. In a modification, the device is arranged in the outer container of the extinguisher.