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Патент USA US2403801

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July. 9,1946.
Filed April 27, 1945
‘\mo‘sm. QB
Patented July 9, 1946
2,403,801 ’
Langley W. Isom, Belmont, and Emile E. Habib,
Arlington, Mass., assignors to Dewey and Almy
Chemical Company, North Cambridge, Mass,
a corporation of Massachusetts
Application April 27, 1943, Serial
2 Claims.
(Cl. 251-115)
This invention relates to balloons and valves
for balloons. Relatively small balloons have come
into wide military use to support antennas for
radio equipment, others must ?y free at constant
levels. Since, in ?eld service the source of hy
drogen cannot be derived from a tank,.it is usual
ly derived from portable generators which liber
ate h'ydrogen by chemical action. The design of
a valve which will prevent'the escape of hydro
vents the plug [1 from turning in the ring II)
when the in?ation nozzle is twisted and pushed '
through the bore 2 I.
The in?ation nozzle 25 has a ?at head 26 cham
fered at its margins and bears ports 21 and'28
drilled through its cylindrical wall adjacent the
head and communicating with its bore 29. Cross
kerfs 3I--3I are out across the head 26 and a
small ‘port 32 located at their intersection com
gen at the very low in?ation pressures necessary 10 municates with the bore 29.
has presented numerous di?iculties.
To in?ate the balloon, the_ nozzle 25 isattached
In the ?rst place, passageway through the valve
to a, gas generator (not shown) and is pushed
and through the in?ation tube must be large,
into the bore 2| of the valve. ‘When pushed
home, the ports 21 and 28 lie above the hemi
spherical portion I9 of the plug I‘! and valve ?ap
24 is pushed into a sharply conical shape and
raised from engagement with the portion I9,-al
lowing gas to enter the envelope. As the nozzle is
withdrawn, the edges of the valve ?ap 24 come
20 into contact with the hemispherical portion I9
?rst immediately adjacent the walls of the bore
otherwise a substantial back pressure will be built ,
7 up in the hydrogen generator and, because ?eld
generators are simple and are not well provided
with traps for foam or debris, the valve must be
able to seal off the hydrogen after in?ation even
though some lime or. other chemical reaction
product is carried into the valve along with the
?ow of gas.
The production of a suitable valve and the
2| and then, as the ?ap contracts further, its
edges slide further down the hemispherical por
design of a cooperating in?ation nozzle which
tion I9 of the plug IT. The wiping action in the
cannot seize or tear the valve ?ap are objects
of our invention. These and other objects of the 25 closing of the valve sweeps away any particles of
invention will become apparent from the speci?
lime or foam which may have been blown into the
cation and from the drawing, in which
valve by the generator and assures a hydrogen
tight seal under all conditions. At the time that
Figure 1 is a vertical sectional view taken on
the line I-I of Figure 2;
the nozzle is withdrawn, the kerfs 3|, and port
Figure 2 is a top plan View;
80 32 prevent the nozzle head 26, and the valve ?ap
Figure 3 is an exploded view showing the com
24 from adhering by suction, which otherwise
ponent parts of the valve;
might draw the valve ?ap into the bore or dis
place it from proper seating.
Figure 4 is a sectional view showing the valve
The valve itself is simple and self-cleaning
in place in a balloon envelope with the in?ation
nozzle inserted; and
35 since it sweeps lime particles and slimeaway
Figure 5 is a perspective view of the in?ation
from the valve seat on closing and it maintains
The valve comprises a ring I0, Figure 1, which
is ?xed in the neck II of the balloon usually by
means of cement and a lashing I as shown in
a tight seal with very low in?ation pressures.
We claim:
1. A nozzle for in?ating balloons having means
to prevent seizing and displacement of the valve‘
Figure 4. The bore I2 of the ring carries two
elements upOn the withdrawal of the nozzle com
wedge-shaped projections I3 and I4 molded in
prising a closed end tube having in?ating ports
its wall. These do not extend throughout the
adjacent its closed end communicating with its
whole length of the bore but end at the shoulders
bore, kerfs formed. across the closed end of said
I5 and I6, as shown in Figure 3. The valve proper 45 tube and a port of a smaller diameter than the
comprises a cylindrical plug I1 having a ?at base
bore providing a passage between the kerfs and
the bore of said tube.
I8 and a hemispherical head I9 and is provided
with an axial bore 2I. The cylindrical shape of
2. A valve for in?ating balloons comprising a
ring having Wedging projections on its inner wall,
the plug is modi?ed at 22 and 23 by recesses
shaped to receive the projections I3 and I4. The
a plug having an axial bore adapted to be in
valve ?ap 24 is formed from a U-shaped elastic
serted in the ring and bearing cooperating wedg
band, the ends of which are cemented in the re
ing surfaces on its outer walls, and a resilient
cesses 22 and 23 and which is pulled under ten
valve flap stretched over one end of said bore and
sion against the hemispherical head I9 of the
having its ends secured between the wedging pro
plug I1 in such a manner that it closes o? the 55 jections of the ring and the wedging surfaces of
the plug, thereby maintaining said ?ap under
bore 2 I. When the bases 3 of the recesses 22 and
tension to normally close the axial bore of said
23 lie against the shoulders I5 and I6,'the ends
of the ?ap 24 are tightly wedged between the ring
and the plug. In addition to acting as wedges to
hold the valve ?ap in place, the mating rela-, 00
tionshlp of the recesses and the projections pre
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