US2313614A - Fire hose nozzle - Google Patents

Description

Max-6h 9, 1943.

P. R. .BOOTHMAN FIRE HOSE ,NOZZLE Filed Jan. '2. 1942 'P ms TTDPN Patented Mar. 9, 1943 UNETEE STATES itzt'i'ENT QFFICE Application January 2, 1942, Serial No. 425,477 In Great Britain October 10, 1940 1 Claim.

This invention relates to fire hose nozzles, the chief object being the provision of a new or improved fire hose nozzle for dealing with incendiary bombs and preventing the spread of fire therefrom as well as for ordinary fire-fighting purposes.

According to the invention, the fire hose nozzle is of the kind which incorporates a jet and a spray which can be used either independently or together as occasion demands, and comprises a nozzle body formed with two non-coaxial through passages or bores which are controlled by independent manually operated valves and communicate at the inlet end with a common coupling connection to the hose.

Thus in dealing say with an incendiary bomb, it can first be subjected to the action of the spray and be finally quenched by the jet, whilst during this quenching by the jet the spray can, if necessary, be operative to prevent the spread of fire in the vicinity of the bomb or to quench any incendiary fragments of the latter which may have burst away during the initial spraying or final quenching with the jet. Similarly in ordinary fire-fighting the spray can be used to prevent the spread of the fire whilst the jet is directed on to the burning material, the usual procedure being to operate from the fringe of the outbreak towards the centre, in which process the spray serves to damp down the material which has already been subjected to the action of the jet, until finally the spray alone may be used to prevent a fresh outbreak from smouldering material.

If desired, means may be provided on the nozzle for connecting either the jet or spray, or both, to a can or other vessel containing an appropriate chemical solution for use in dealing with oil or spirit fires and which produces a fire extinguishing foam when mixed with the water supply through the nozzle, the arrangement being such that the said chemical solution is drawn into the water stream issuing from the spray or jet by the suction or induction effect.

In order that the invention may be clearly understood and readily carried into effect, the same will now be more fully described with reference to and by the aid of the embodiment illustrated in the accompanying drawing, wherein:

Figures 1, 2, 3 and 4 are respectively a side elevation, front elevation, rear elevation, and a plan of a fire hose nozzle.

Referring to the drawing, the fire hose nozzle, which is made of brass or other appropriate metal, comprises a body I having at its rear end an internally screw-threaded socket 2 constituting the female section of a coupling whereby the nozzle can be connected to the branch pipe of a supply hose (not shown) and from this socket 2 extend two longitudinal bores 3, 4 which are controlled by independent valves 5, ii respectively of the ordinary plug or stop cock type which are adapted to be manually operated by levers l, 8 respectively, the limiting positions corresponding to full on and off being determined by stops afforded by the opposite ends of arcuate fences 9 with which the levers 'l, 8 co-operate, said fences 9 being formed integrally with the screwin valve retaining bearing members Ill and partially encircling the bosses of said levers l, 8.

The lower bore 4 which extends completely through the body I is plain throughout and terminates at the forward end in a discharge nipple ll so that pressure water will issue therefrom in the form of a jet and the upper bore 3 is flared as indicated at I2 at the discharge end and terminates in a narrow elongated orifice l3, as shown more particularly in Figure 2, so that pressure Water will issue therefrom in a fiat or fan-shaped spray. In other words, the discharge orifice or opening i3 is shaped in the form of a knife edge at its outer extremity to provide a fine spray arranged to coact with the straight jet to insure a double supply of water being applied on the fire. In this connection the discharge end of the flared outlet from the bore 3 is preferably inclined as shown so that the spray will be directed upwardly somewhat relatively to the trajectory of the jet.

Thus when both control valves '1, 8 are open (as shown) the water leaving the elongated or slot-like orifice l3 of the nozzle will afford a fanshaped blanket of spray over the jet issuing from the nipple ll, whilst either the jet or the spray can also be used independently by appropriate operation of their associated valves.

The nozzle, instead of being of the usual tapered form, is of uniform cross-section from the socket portion forwardly to the narrowed front portion [4, so as to ensure a more balanced distribution of weight which will assist in preventing tilting up of the nozzle in use and materially facilitate its handling or control.

Although valves of the stop cock type have been described for the independent control of the jet and spray, any other appropriate type of manually operated quick action valve may be employed.

I claim:

A fire hose nozzle having in combination a nozzle body provided with two longitudinally spaced passages communicating at the inlet end with a common hose coupling connection, one of the said passages at its discharge end terminating in a jet nozzle and the other passage terminating in a narrow elongated spray nozzle diverging upwardly irom the longitudinal axis of the spray passage, the spray passage being positioned above the jet passage so that when fluid issues from both passages. the jet nozzle throws out a straight jet that strikes the fire first and the spray nozzle throws out a fan shaped spray that covers the flame so as to ensure a double supply of Water being applied to the fire, and independently operable valves for controlling the flow of the supply through each of said passages.

PERCY RICHARD BOOTHMAN.

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