Патент USA US2110044код для вставки
arch l, 1938. l.. JARvIs FIRE EXTINGUISHING NOZZLE Filed April 16, 1936 l 2,110,044 Patented Mar. 1, 1938 l 2,110,044 FIRE EXTINGUISHING NÜZZLE Leo Jarvis, Albany, N. Y. Application April 16, 1936, Serial No. 74,792 v 2 Claims. My invention relates to nozzles and particularly to ñre 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 10 quite impossible to bend or curve it except in an arc of comparatively long radius. Due to the impossibility of bending or ñexing the hose and also due to the strong reaction or “kick back” of the issuing water, it is impossible .15 for ñremen handling hose from a ladder to throw a stream of water through a window except sub~ stantially in a straight ahead direction. It is frequently desirable to throw the water at right angles to the general nozzle and hose 20 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 op posite to the direction in which the stream is is 25 suing, 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 direc tions. The principal object of my invention is to pro vide 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 in cludes the novel elements and the combinations 40 and arrangements thereof described below and illustrated in the accompanying drawing in which Fig. 1 is an elevation view of an extension ele ment adapted to be screwed directly onto the 45 hose; Fig. 2 is an elevation view of a nozzle element adapted to be threaded onto the end of the ex tension 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 (Cl. 299-69) 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 sur Ul round the sphere in spaced relation thereto; Fig. 9 is an elevation view of the guard, partial ly 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 hol low 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 15 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 tu bular element is exteriorly threaded as shown 20 at 4. In Fig. 2, I have shown a hollow tubular ele ment 5 interiorly threaded at one end 6 to co operate 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 ele ment 5. The openings I5 and I6 have a running 45 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 ele ment 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. 55 2,110,044 The hollow sphere I4 is provided with a plu rality 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 there from 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 15 discs 2l and 22 at the top and with semi-cylin drical 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 20 permit a screw to be passed therethrough and into the threaded opening 26 in plug I0. The open ing 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 25 24 at the bottom of the guard are secured to gether by clamp screws 29 and 3U, it being under stood that the collars 23 and 24 are clamped about the base of the element 5. It will be notedthat the openings I8 in sphere 30 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 di rection toward the hose line. Thus, where the interior of the front Wall of a building is burning 35 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 substan 40 tially in all directions at the same time, the re actions created by the issuing jets are substan tially balanced. Moreover, by rotating the sphere, thewater is discharged in sheet form in stead of in a plurality of separate streams or jets so that every spot within range thereof is wet directly without moving the nozzle and independ ent 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 tubu lar 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 surround ing said discharge openings whereby water is dis charged therefrom into said sphere, and a sta tionary 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 con structed and arranged that the reaction of water issuing therefrom will rotate said sphere, and so 20 disposed that water will be discharged backward ly 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 surround ing said discharge openings whereby water is discharged therefrom into said sphere; said F31) sphere being provided with a plurality of dis charge openings therein so constructed and ar ranged that jets of water will be discharged therefrom in substantially all directions and ro tate said spherical element whereby the reactions $5 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. 40 LEO JARVIS.