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Патент USA US2110044

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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.
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