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Nm., 2%, Íig?ífâ.
B. CHRISTENSON
l
294339677
HOT WATER BAG
Filed March 26, 1945
2 Sheets-Sheet l
NGV. 26, Í946.
E, CHRISTENSON
ÉAÍLÉTÍ
HOT WATER BAG
Filed March 26, 1945
2 Sheets-Sheet 2
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2,411,677
Patented Nov. 26, 1946
UNITED STATES PATENT OFFICEv
2,411,677
HOT-WATER EAG
Een Christensen, Pasadena, Calif.
Application. March 26, 1945, Serial No. 584,901
3 Claims.
(Cl. 219-46)
1
2
My invention relates to improvements in hot
water bags, the primary object in view being to
equip such a device for heating by electricity with
electrical heating means incorporated in the bag
and fully protected against contact with the
head I5, lateral intermediate lugs II thereon for
engaging the outer end of the stopper 8,.and a
threaded inner end I2 adapted to be turned into
a threaded opening I3 formed in a bridge piece I4
traversing the inner end of said neck 5. As the
pin 9 is turned into said opening I3, the lugs II
compress the stopper 8 in the neck 5 to tightly
close said neck.
water.
Another object is to equip such bags with elec
trical heating means interposed between the walls
of the bag and completely closed oir from water
Within the bag i is a slab-like core if: of rec
tangular form, and which is shorter than the bag
in the bag.
i to space the same from the bottom of said bag
Still another object is to provide a hot water
and from the neck 5, but is of a width to iit be
bag equipped in the manner and for the purpose
tween the edges 3 of said bag. The core I4 is
above set forth which is comparatively inexpen
preferably formed of rubber or rubber composi
sive to manufacture and not liable to get out of
order.
15 tion and is attached at its side edges I5 along
the seams ¿l preferably by vulcanization. The
Other and subordinate objects also compre
sides of the core ifi between said edges thereof are
hended by my invention, together with the pre
detached from the sides of the bag I so that said
cise nature of my improvements, will become
bag may be distended by pressure of water there
readily apparent when the succeeding description
and claims are read with reference to the draw 20 in. Transverse through ports I5, preferably cy
lindrical, are provided in the core I4 in longitudi
ings accompanying and forming part of this spec
nal rows, with the ports I6 in alternate rows stag
ification.
gered relative to those in intermediate rows, said
In said drawings;
ports providing for passage of water through the
Figure 1 is a View in side elevation, partly bro
ken away and shown in section, of a hot water 25 core from side to side of the bag I. The sides of
the core I4 are corrugated by longitudinal grooves
bag embodying my improvements;
I'I arranged intermediate rows of ports I6, the
Figure 2 is a view in edge elevation;
grooves il on each side being opposite those on
Figure 3 is a view in longitudinal section taken
the other side of said core. The grooves I‘I re
on the line 3_3 oi Figure l;
duce the thickness of the core Ill between oppo
Figure 4 is a view in transverse section oí the
core;
`
Figure 5 is a fragmentary view in longitudinal
section taken on the line 5-5 of Figure 2 and
drawn to an enlarged scale.
Describing my invention in detail, with refer
ence to the drawings by numerals, I designates
the hot water bag, proper, which is formed of the
usual material, such as rubber or rubber composi
tion, and comprises sides ’E secured together at
site grooves for a purpose presently seen.
An
elongated tapered tongue IB, forming an integral
part of the core I 4, extends from the top edge
of said core through the top of the bag at one side
of the neck 5, and which is suitably attached to
the top of the bag, as by vulcanization, to form
a Water-tight seal between the same and said bag.
Heating elements in the form of looped coils
i9, 25 are embedded in the core I4 in a common
the edges
that is, the longitudinal edges, by 40 plane therewith to extend between the rows of
ports I5 and along the top and bottom edges of
seams, as at d, for instance by vulcanization.
said core, the coils I9, 20 being reversed in one
A filler neck 5 of suitable material, and pref
element relative to those in the other element
erably rectangular in cross-section, is inserted
and the coils 2E) of one element extending into the
into the top of the bag I centrally oi said top, and
which tapers inwardly of the bag i and is pro 45 coils i9 oi the other element, the terminals 2I
of the coil I9 and those 22 of the coil 2i) extending
vided with a lateral intermediate flange 6 for
into the tongue I8, and being connected by a suit
clamping to the top oi the bag I on the inside
able coupling 23 to an electric cable 24, of any
thereof, and with a clamping collar 'I ñtting
suitable type, extending out of said tongue I8
around said neck against the outside of said top
and soldered or otherwise secured to said neck, 50 and provided with a suitable switch 25 therein
such as is commonly used in regulating the degree
as at 'l'.
A stopper 8, preferably oi rubber, is provided
for fitting into said neck 5 with a wedging action.
of heat generated by electrical heating devices.
As shown in Figure 1, the coils I9, 20 are arranged
to extend around the ends of alternate rows of
A locking pin 9 extends through said stopper 8,
centrally, with an outer end, hand grip-forming 55 ports I6, respectively.
3
2,411,677
4
The manner in which the described invention
operates will be readily understood. The de
scribed heating coils, or loops, I9, 20 heat the core
edges of the core being connected to said edges
1. A hot water bag having longitudinal edges
ting in the bag between the edges thereof, said
of the bag, the sides of the bag being free from
connection with said core, a tongue extending
I4 which heats the water in the bag l, and said
from the top edge of said core out of the top of
core provides heat-transfer surfaces of maximum
said bag, electrical resistance coils embedded in
area, whereby the water is quickly heated to a
said core in substantially the plane thereof and
high temperature. The core I4 being flexible
having terminal ends extended into said tongue,
does not interfere with using the bag in the usual
and an electric cable extending from said tongue
manner, and the ports I6 and grooves I1 render
and to which said terminals are connected, said
the core light in weight, yet strong, and reduce 10 core having transverse ports therein for the pas
the amount of space ñlled by said core.
sage of water through said core and arranged in
The foregoing will, it is believed, sufiice to im
rows with the ports in alternate rows staggered
part a clear understanding of my invention with
relative to the ports in intermediate rows to pro
out further explanation.
vide for a maximum number of ports in said core,
Manifestly, the invention, as described, is sus 15 said coils extending between rows of ports and
ceptible of modiiication without departing from
around the ends of alternate rows, respectively, to
the inventive concept, and right is herein re
prevent water from contacting the same.
served to such modifications as fall within the
3. A hot water bag having longitudinal edges
scope of the appended claims.
and sides, a slab-like rectangular core of ñexible
What I claim is:
20 insulating material having longitudinal edges ñt
and sides, a slab-like rectangular core of flexible
edges of the core being connected to said edges of
insulating material having longitudinal edges f1t
the bag, the sides of the bag being free from con
ting in the bag between the edges thereof, said
nection with said core, a tongue extending from
edges of the core being connected to said edges of 25 the top edge of said core out of the top of said
the bag, the sides of the bag being free from
bag, electrical resistance coils embedded in said
connection with said core, a tongue extending
core in substantially the plane thereof and hav
» from the top edge or" said core out of the top of
ing terminal ends extended into said tongue, and
said bag, electrical resistance coils embedded in
an electric cable extending from said tongue and
said core in substantially the plane thereof and 30 to which said terminals are connected, said core
having terminal ends extended into said tongue,
having transverse ports therein for the passage of
and an electric cable extending from said tongue
water through said core, and arranged in rows
and to which said terminals are connected, said
with the ports in alternate rows staggered relative
core having transverse ports therein for the pas
to the ports in intermediate rows to provide for a
sage of water through said core, and arranged in
maximum number of ports in said core, said coils
rows with the ports in alternate rows staggered
extending between rows of ports and around the
relative to the ports in intermediate rows to pro
ends of alternate rows, respectively, to prevent
vide for a maximum number of ports in said core.
water from contacting the same, said core being
2. A hot water bag having longitudinal edges
provided with longitudinal side grooves to reduce
and sides, a slab-like rectangular core of flexible 40 the thickness thereof between the grooves and fa
insulating material having longitudinal edges ñt
cilitate transfer of heat through the core.
ting in the bag between the edges thereof, said
BEN CHRISTENSON.
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