US2110044A - Fire extinguishing nozzle - Google Patents

Description

arch l, 1938. l.. JARvIs FIRE EXTINGUISHING NOZZLE Filed April 16, 1936 Patented Mar. 1, 1938 2 Claims.

My invention relates to nozzles and particularly to re extinguishing nozzles.

It is well known that ordinary nozzles for fire hose are designed with a straight bore coaxial with the hose to which the nozzle is connected so that the stream of Water issuing therefrom is, at least initially, substantially coaxial with the hose. Due to the high water pressure employed, the hose line is so hard and inflexible that it is quite impossible to bend or curve it except in an arc of comparatively long radius.

Due to the impossibility of bending or exing the hose and also due to the strong reaction or kick back of the issuing water, it is impossible for remen handling hose from a ladder to throw a stream of water through a window except substantially in a straight ahead direction.

It is frequently desirable to throw the water at right angles to the general nozzle and hose line or even in a backward direction in order to extinguish the fire. This is quite impossible with the present nozzles and, due to the reaction of the issuing stream which is always in a direction opposite to the direction in which the stream is issuing, it is not very practical to have a nozzle provided say with a ball and socket joint and which can be turned in substantially all directions.

The principal object of my invention is to provide a nozzle which will throw water backwards, sidewise and forward at an angle to the axis of the nozzle and in which the reactions due to the issuing Wate-r are substantially balanced. Another object is to provide a nozzle of this character of simple construction and which may be readily assembled or disassembled.

With these objects in View, my invention includes the novel elements and the combinations and arrangements thereof described below and illustrated in the accompanying drawing in which- Fig. 1 is an elevation view of an extension element adapted to be screwed directly onto the hose;

Fig. 2 is an elevation view of a nozzle element adapted to be threaded onto the end of the extension element shown in Fig. 1;

Fig. 3 is a bottom plan View of Fig. 2;

Fig. 4 is a plan view of a screw cap or plug adapted to close the upper end of the element shown in Fig. 2;

Fig. 5 is an elevation View, partially in section, of the plug shown in Fig. 4;

Fig. 6 is a plan View of a hollow perforated sphere, partly broken away, through which the water is discharged;

Fig. 7 is an elevation view, partially in section, of the sphere;

Fig. 8 is a plan view of a guard adapted to surround the sphere in spaced relation thereto;

Fig. 9 is an elevation view of the guard, partially in section;

Fig. 10 is a bottom View of the guard; and

Fig. 11 is an elevation View, partially in section, of the nozzle assembly.

Referring to the drawing, I represents a hollow tubular element internally threaded as shown at 2 whereby it is adapted to be screwed onto the end of a fire hose. In order that a tight joint may be formed, the exterior of the tubular element is provided with projections 3 adapted to receive a special wrench or Spanner for tightening or loosening the joint. The other end of the tubular element is exteriorly threaded as shown at 4.

In Fig. 2, I have shown a hollow tubular element 5 interiorly threaded at one end 6 to cooperate with the external threads 4 on element I whereby the two may be coupled together. In order to form a tight joint here the element 5 is provided with external projections 'I adapted to receive a special wrench or Spanner. At the other end the element 5 is interiorly threaded as shown at 8 to receive the threaded stem portion 9 of the plug IB which serves to close the tubular element 5 and also to secure other elements of the nozzle to the element 5 in assembled relation. The element 5 is provided with a plurality of lateral openings I I adapted to permit water to be discharged therethrough. 'I'hat portion of the element ii having the lateral openings II therein is of somewhat smaller diameter than the base portion I2 in order to provide a shoulder I3 which forms a bearing upon which the sphere I4 is adapted to revolve. The sphere I4 is hollow and provided at the top and bottom with openings I5 and I6 respectively adapted to permit it to be slipped over the perforated portion of the element 5. The openings I5 and I6 have a running fit with the exterior surface of the element 5 so that the sphere I i may rotate freely about the axis of the element 5. When the sphere I4 is positioned over the element 5, the cap or plug IB is screwed into place and the head I1 of element I0 retains the parts in assembled relation. It is to be understood that when the plug I0 is screwed into place the sphere I4 has a running fit between the shoulder I3 and the head I'I of element I Il.

The hollow sphere I4 is provided with a plurality of circular openings I8 preferably disposed in lines or zones as shown in Figs. 6 and 7. These openings are not drilled in a direction radially of sphere I4 but at an angle to the radius of the sphere passing through the center of the opening so that the reaction of the Water in issuing therefrom tends to rotate the sphere.

In order to protect the sphere I4, I surround it by the guard element indicated generally at I9 in Figs. 8, 9 and 10. This guard comprises a plurality of curved bars 20 adapted to surround the sphere and be spaced somewhat therefrom. The bars 8 are cast integral with semi-circular discs 2l and 22 at the top and with semi-cylindrical collars 23 and 24 at the bottom. In other words, the guard I9 is madein two parts in order that it may be assembled about the sphere. Disc 2I is provided with an opening 25 adapted to permit a screw to be passed therethrough and into the threaded opening 26 in plug I0. The opening 2'I in disc 22 functions similarly to receive a screw cooperating with the threaded opening 28V in plug Ill. The semi-cylindrical collars 23 and 24 at the bottom of the guard are secured together by clamp screws 29 and 3U, it being understood that the collars 23 and 24 are clamped about the base of the element 5.

It will be notedthat the openings I8 in sphere I4 extend from the top to the bottom so that water issuing therefrom is not only thrown ahead of the nozzle but also in a backwards direction toward the hose line. Thus, where the interior of the front Wall of a building is burning the nozzle may be thrust through a window and water will be directed inV a backward direction from the nozzle against the burning Wall. The reaction of the issuing water causes the sphere to revolve and since the water is issuing substantially in all directions at the same time, the reactions created by the issuing jets are substantially balanced. Moreover, by rotating the sphere, thewater is discharged in sheet form instead of in a plurality of separate streams or jets so that every spot within range thereof is wet directly without moving the nozzle and independent ofthe spacing of the openings in the sphere circumferentially of the axis of rotation.

What I claim is:

y1. A nozzle for a fire hose comprising a tubular element adapted to be secured to said hose and having water discharge openings in the side thereof, a hollow spherical element rotatably mounted on said tubular element and surrounding said discharge openings whereby water is discharged therefrom into said sphere, and a stationary guard element secured to said tubular element and surrounding said sphere in spaced relation thereto; said sphere being provided with a plurality of discharge openings therein so constructed and arranged that the reaction of water issuing therefrom will rotate said sphere, and so disposed that water will be discharged backwardly in the direction of said hose and to the sides thereof.

2. A nozzle for a lire hose comprising a tubular element adapted to be secured to said hose and having water discharge openings in the side thereof, a hollow spherical element rotatably mounted on said tubular element and surrounding said discharge openings whereby water is discharged therefrom into said sphere; said sphere being provided with a plurality of discharge openings therein so constructed and arranged that jets of water will be discharged therefrom in substantially all directions and rotate said spherical element whereby the reactions of said jets will be substantially balanced, and said nozzle when thrust through a window of a burning building will discharge substantially continuous sheets of Water backwardly against the wall of said building about said window.

LEO J ARVIS.

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