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Патент USA US2092935

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Sept. 14, 1937.
, _A. c. SMITH _ _
2,092,935
FLOAT VALVE
Fiiedoct. 1, 1934
2 Sheets-Sheet 1
sept.f14,1937.
y 1 '
¢, SMITH
2,092,935
„40; ATTORNEY.
Patented Sept. 14, -1.937
' ‘s 2,092,935
UNITED STATE-s
ylearizrrr OFFICE `
2,092,935
FLOAT VALVE
Albert C. Smith, Evansville, I Ind., assignor, by
mesne assignments, to Servel, Inc., Dover, Del.,
a corporation of Delaware
»
`Application October 1,
6 Claims.
My invention relates tozrefrigeration-and more
particularly to an absorption type refrigerator
operated by a liquid fuel burner.
„
'
It is an object of my invention to provide a re
C41
frigerator of this type having a temperature ad
justment means accessible to the user.
'
Another object is to provide a liquid fuel burn
er for an absorption type refrigerator having an
adjustment means which is simple and accurate.
assembly 2I having a removable chimney or com
bustion shield 22 >which `extends upwardly into
the forwardly projecting end of the louter heating
flue I 8 which is provided with a cutaway portion
or recess 23 to admit the upper end of the chim
ney 22. The forwardly projecting end of the iiue
I8 `and the upper end of the burner chimney 22
are enclosed by a removable thermally insulated
hood 24. For a more complete description of this
I attain these objects by utilizing a liquid fuel ’ assembly,
reference maybe had to an applica
burner regulated by a float valve for heating a
generator of an absorption type refrigerator, and
provide for gradual adjustment of the burner
ñame and, thereby, the refrigeration temperature,
by fine adjustment of the float valve operation.
I may do this, for instance, by adjustably weight
ing the burner float' with a ñexible weight ele
ment such as a _chain which I herein generically
term a weight string. My invention will be more
fully understood upon consideration of the fol
lowing description and the accompanying draw
ings forming part of this specification Aand of
which:
»
_
.
Fig. 1 is a broken side elevation, with parts
_broken away, of a refrigerator embodying my in
-
vention; and
.
»
,
Fig. 2 is a detail view, partly in vertical section,
of a liquid fuel burner for the refrigerator shown.
in Fig. 1.
p
.
Referring to Fig. l of the drawings, a refriger
-ator cabinet I8, itself of known construction, in
cludes a thermally insulated storage compart
10
tion Serial No. 734,075 of William R.. -Halnsworth.‘
In the other side of the lower apparatus com
partment I3 is a storage tank or reservoir 25 vfor
liquid fuel, such as kerosene. Liquid is con
ducted from the reservoir 25 to the burner 2I
through a conduit 26.
'
15
-
The construction of the burner 2 i may be best _
understood by reference to the detail section in
Fig. `2. The burner assembly includes a safetyv
valve 2l, a float valve 28,’a float chamber 29, a
burner tube 30, an annular burner well 3|, and
0
the removable chimney 22. Liquid fuel flowing
to the burner through conduit 26Ipasses through
the normally open safety valve 21 and a conduit
33 into a valve chamber 34. Flow of liquid fuel
from the chamber 34 into the Íloat chamber 29
is regulated by the float valve 28 to maintain a
substantially constant level of liquid in the _float
chamber. -The iioat chamber 29 includes a por
- tion formed by a float .vessel 35 in which is conf
tained asuitable iloat36.
The float 3.6"is oper
30
. atively connected to the valve 28 by means of a4 ’
ment II accessible by 4means of a door I2, anda` rod or valve stem 3l.- The iioatSB may be pro-.V
lower _apparatus compartment I3 accessible by vided
with a recess 38 in thetop thereof forv ay
means of a downwardlyvopening,,hinged door I il purpose which will hereinafter appear. ,The float .~
35
or other suitable closure member. An absorption vessel 35 isl provided with a suitable> cover 39
refrigeration apparatus which may be of the gen- ' having an openingJlû in the top thereof, over the
eral type disclosed 'in'Patent 1,609,334 to Von* recess 38 in the float 3B. "Liquid` ilows from the
includes a cooling element or evaporator I5 in float chamber 29 toward the annular burner well
Platen, et al., is mounted in the cabinet Ill and .
3Ithrough the burner tube30Í and stands in _the
the storage compartment I I and a generator hav I burner
tube '30- substantially at the same level as
ing a substantially horizontal portion I6 in one that in the float chamber. The chimney 22
side of the lower apparatus compartment I3.
The horizontal portion I6 of the generator is
l5 provided with a Vsubstantially horizontal inner
heating flue `I'I extending therethrough and is
surrounded by an outer heating ?lue I8. The
latter is surrounded by suitable thermal insulat
ing material I9, such as mineral wool, retained
`0 in place by a light sheet metal casing 20. 'I'he
forward end of the heating flue I8 projects be
yond the front end of the casing 20 and also be
yond the end of the inner heating ñue I1. _Be
neath the forwardly projecting end of the Aouter
5 -heating ñue I8 is mounted a liquid fuel burner
which is removably supported above the burner
well 3| comprises a pair of perforated concentric
cylinders 4I and 42, forming an annular combus
tionspace above the annular burner well 3|, and
an outer shield or chimney comprising a frusto
conical shell ¿53.> 'I'he cylinders 4I and 42 and
the chimney 43 are retained in their assembled
positions by perpendicular bars 4'4 and pins 45.
The float 36 and valve 28 are constructed to
normally maintain a' substantially constant level
of liquid in the iioat chamber 29 and the burner
tube ,30, -for instance, at the level L. At this
level the burner produces a relatively small ña'me, 55
2,099,935
herein referred to as the minimum flame. It will
be understood that the burner flame and, there
fore, the heat produced by the burner may be
ment of the refrigerator temperature. The knob
6| may therefore be referredto asa temperature
adjustment.
Various changes and modifications will be
apparent to those skilled in the art, wherefore my
5 burner tube 30.
is not limited to that which i's shown in
In accordance with my invention, I provide a .invention
the drawings and described in the specification
» suitable weight string such as a chain 46. Refer
ring to both Figs. 1 and 2 of the drawings, the but only as indicated in the following claims.
What I claim is:
chain 46 is suspended over pulleys 41 and 48.
lincreased by raising the level of liquid- in the
10 The pulley 41 is located over the opening 40 in
the float vessel cover 39 so that one end of the
chain'- may depend through the opening 40 di
rectly above the recess 36 in the float 36. The
pulley 48 is located over a spindle or stub shaft
'15 49 so that the other end of the chain 46 may be
secured to the stub shaft in such a manner as to
1. In a kerosene burner for absorption refrig 10
eration apparatus, a float chamber, a valve for
regulating iiow of -kerosene to said float chamber,
a iioat in said chamber operatively connected to
said valve, a weight string movable for deposit .of
variable length thereof on said float, and means 15
for moving said string'.
.
\`
become wound and unwound-upon turning of the « l 2. In a kerosene burner for absorption refrig
shaft inopposite directions. The shaft 49 may
be suitably journaled in the front of a shield plate
20 59 which laterally surrounds the burner assem
bly 2I. A suitable knob 5I is provided for turn
ing the shaft 49 to wind and unwind the chain
` 46. ‘The stub shaft 49 may be extended through
the front of the shield 60 and the knob 5l secured
25 on the end of the shaft outside of the shield so as
to be readily accessible from the front of the
refrigerator, as illustrated.
It will now be understood that turning the knob
5| to unwind the chain 46 allows the other end
30 of the chain to descend into the recess 38 in thetop of the float 36 and add its weight to that of
the float. If 'the weight of that portion' of the
chain 46 below the pulley 41 is not suñlcient to
carry the weight of the chain between the pulleys
35 41 and 43, a weight W may be added to the chain
46 below the pulley 41 to insure deposit of the
chain upon the float 36 upon> unwinding of the
chain when the knob 6l is turned. 'I‘he addi
tional weight of that portion of the chain 46 rest
40 ing upon the float 36 results in a greater displace
ment and a sinking of the float, and a higher level
- of liquid in the float chamber 29 is necessary to
eration apparatus, a float chamber, a valve for
regulating flow of kerosene to said float cham
ber, a float in said chamber operativelyconnect 20
ed to said valve and having a recess in the'top
thereof, a weight string having one end depend
ing into said recess and movable for deposit of
variable length -thereof therein, and means for
moving said string.
25
3. In a kerosene burner for absorption refrig
eration apparatus,l a iioat chamber, avvalve for
regulating flow of kerosene to said float chamber,
a float in said chamber operatively connected to
said valve and having a recess in the top thereof, 30
a chain having one end depending into said re
cess and movable for deposit of variable length
thereof therein, and means for moving said
chain.
l
‘
4. In a kerosene burner for absorption refrig 35
.eration apparatus, a float chamber, a'valve for
regulating flow of kerosene' to said’fioat cham
ber, a ñoat in said chamber operatively connected
to said valve and having a recess in the top there
of, a chain having one enddepending into said
recess and movable for deposit of variable-length
thereof therein, and rotatable means connected
raise the float suilicientlyvto close -the valve 26. " to the other end of said chain for moving the
A higher liquid level is therefore maintained in latter.
5. A liquid fuel burner for absorption rei‘rig-V 45 the float chamber and burner tube 36 and a cor
eration apparatus and having regulating means
respondingly greater burner flame is produced.
By suitably providing one or more stops' 52 for ' including a iloat, and means for increasing and
the knob 6l, the amount of chain deposited upon decreasing the weight of said float comprising a
the float 36 may be limited to that required for flexible member constructed and arranged to be
50 producing the desired maximum flame. which deposited on said float in various amounts.
results when the liquid level is at some higher
6. A liquid fuel burner for absorption refrig
Alevel such as that indicated by the level line H. eration apparatus and having regulating means
By. turning the knob 5I intermediate the stop or including a float, means for increasing and de
stops 62, the liquid level in the burner tube and creasing the weight of said ñoat comprisinß a
55 therefore the burner flame may be adjusted be
iiexible member constructed and arranged to between its maximum and minimum values. Since deposited on said float in various amounts, and
the temperature of the refrigerator cooling ele
a rotatable member for manipulating said fiex- _
ment I5 may be changed by changing the heating
ible
member.
of the generator I6, adjustment of the burner
60 flame by turning the knob 6i results in adjust
~
’
_
ALBERT C. SMITH.
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