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Патент USA US2408270

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Sept. 24, 1946.
I
I w_ R, PETERSON
‘
‘
2,408,269
THERMOS'I'ATIC CONTROLLER‘ FOR WATER TEMPERATURE
Filed Sept. 1, 1942‘
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2,408,269
Patented Sept. 24, 1946
, .UNITED- STATES PATENT OFFICE
THERMOSTATIC CONTROLLERv FOR- WATER
TElVLPER-ATURE
'
William E. Peterson, Chicago, Ill.,~assignor to~Va~
por Car Heating Company, Inc.-, ChicagoJlL,
a corporation of'New York
_ Application September 1, 1942,‘ Serial‘ No: 45'6‘,8'8»1i
2VClaims. (Cl. 2-36-_--34-)
1.
.
Thisinvention relates to an improved thermo
static means for controlling the flow of water in
an =engine~cooling~ system, more particularly to a
thermostatic valve mechanism adapted to be in
stalled in the conduit through which the cooling
water flows from the engine to the radiator.
This improved-valve mechanism is so designed
that it, will respond only to predetermined
changes in the temperature of‘the water stream,
the valve normally remaining closed until its 10
2
installed; andnthrough which the water stream
?ows;
.
~
The: valvetassembly forming the. particular sub
ject matter: of‘ this‘ invention is housed within
the: upper: bell-shaped portion. l of the conduit
member: 25 rising. from the engine. block. As; will
be notedifrom the: arrows, the water fromthis
enginerblock'?ows or. is. forced upwardly through
this : conduit and‘. thence. through theelbow sec
tion 3 to a suitable connection with the upper
temperature risesabove a predetermined level
and- then- opening and remaining. open until the
portion. of the: radiator inwhich the water is
temperature falls again.
’
.. The principal object of this invention is to pro
r The collar portion 4 at the bottom of‘ elbow‘3
vide anew and improved‘ valve, assembly‘ which
can‘ be'installed as a unit in the. conduit between
the' engine and radiator.v -
‘
cooled byexposure-to the outer air.
'
is secured to the upper end, 5 of conduit I by
means of- the bolts 6, there being an interposed
gasket 1 to prevent leakage. from the-conduit.
The: improved valve assembly is housed within
and; protected by' a casing‘ built up of metallic
sections comprising a; main upper section'8, a top
tially - balanced against water pressures. both 20 section or- cover 9; and: a lower’ section Ill; The
upper end of section 8 is bent reversely on itself
above and below the member; so. thattheposition
toform an outstanding; collar portion H which
of the valve will normally be dependent: entirely.
isbri-mpedabout .the'outstandingcollar I2 at the
upon the water temperature.
lower'endiof cover 9,. this outstandingcollarpor
Another object is to provide‘ a valve of this
type provided with a normally open passage per 25 tion: l'l "being; mounted within the circular groove
l3 formed in the upper end'of bell-shapedhous'e
mitting a limited ?ow of water through: the valve
ing- H and held therein by therupper elbow-sec
at all times so as'to equalize the watertempera
Another object istc provide such an assembly
in which the movable valve member is substan
tion 3,.thussupporting the; entire valve assembly
within the'conduit. The lower end of casing. 8
bodyingv a thermostatic bellows'having an aux v30 is-bent; inwardly: and downwardly as indicated
at' Miso as toterminate in a valve seat l5, against
iliary operating spring adapted to cause‘ the valve‘
which-the; movable valve plate'l6 is engaged to
to open in case of injury to the operatingtbellows.
cut offfthe: main flow‘ of water through the
In other‘ words the 1 valve will fail,: ifcat. all,1in
ture both‘above and below the'valve.v
Another object is to'provide such; awalve'em
open position.‘
.
Another object- is" to‘ provide'animproved valve’ 35
of this type having a balancing bellows-mecha
m'sm at the opposite side of the movable‘valve
conduitsv
.
A;.small;constant1‘y open passage, lFl is'formed
in. disc. ‘or plate: l6“ so as vto; permit. a. continuous
upward ?ow: ofgwater. through‘ the valve,‘ even‘
thoughqthevalve is closed. This prevents .en
tirely:cuttingp?ithewater v?owwliile at the same’
40 time keeping‘ the: Water: both‘ above: and below the‘
water pressures onthe movable valve member
valveat substantially. the. same temperature.
substantially balanced'at allv times.
‘
The‘ inner casing: is completed by- the. lower
Another object‘ is to provide such a valve as
shell1 or housing; III having: a. closed- bottom por
sembly in which the movable members and bel
tion; annupperrcollar l8, which is securedaround'
lowsstructures are substantiallyv enclosed and.
the. lower‘portionof upper'shell 8,.and which is
provided with inlet" o-pem‘ngst l 9 inthe sides there'
protected at all-times by an outer protective hous
of'ior the'?owin’g. stream. of: water‘. This, lower.
ing through which the water stream is permitted
shell I'll.‘v encloses 'thellower balancing bellows or.
to circulate‘ when thevalveisopen.
.
3
member from-the thermost'aticbellows, these two
bellows mechanisms. cooperating.‘ to keep- the
Other objects andv advantagesof this invention
diaphragm: hereinafter. described. .
It will be noted thatv .the;heat‘ed" water‘from
will be more apparent from the following detailed 50
the engine ?rst?ows; as' indicated by thev arrows,
description of one approved form of the tempera
around-the lower portion‘ of" easing Ill,- thence
inwardly through therinlets; “land around the
valve disc [6' when theisame is open and. through
tral section through. the-valve assembly and a‘
sectionof the conduit in. which this-assembly is 55 the main; valve; opening: into the upper chamber
' ture operated assembly.
The accompanying drawing is a vertical cen
2,408,269
A
" f
. .
3
4
29 within casing section 8 which houses the actu
ating thermostatic member. The water Stream
response to changes in temperature, since it con
tains no thermal responsive ?uid except the air
trapped therein, at atmospheric pressure, at the
then flows through the various outlets 2| in the
cover member 9 and thence out through the
elbow-member 3 to the radiator.
5
The upper thermostatic bellows indicated as
a whole at A is housed within the chamber 20 of
time of sealing the bellows. This structure is
held in place by the bolt 31 and nut 38. The
upper end of the bello-wsv35 is secured at 39 to
the cup, member ‘40 which projects downwardly
upper casing section 8 and centered and sus
within bellows 35 and encloses the central thim
pended within this chamber by the upper disc 22
ble 34.
attached to the cover member 9 by bolt 23 and '10 a It will now be understood that the pressure
nut 24. The upper plate or disc 22 is connected
of the water within the lower portion of con
with the lower disc 26 by the ?exible corrugated :
duit I tends to force the plate I6 upwardly
metallic side bellows structure 25, the space with
against the seat I5, but at the same time this
in this bellows assembly containing a certain
waterpressure is exerted on bellows B tending
quantity of thermostatic ?uid which is con-y _ to contract this bellows and pull the valve I6
densed at ordinary low temperature so that the
downwardly. These two portions tend to coun
interior of the bellows is partially exhausted. A " ‘ter-balance one. another so that the movable
hollow tubular member 2‘! open at both ends sur- _ ‘_ valve member I6 will be controlled entirely by
rounds at its upper end the stud member 28
the thermostatic bellows A in the upper chamber.
projecting downwardly from the upper end plate 20 At the same time, it will be noted that the
22, while a similar tubular collar portion‘ 29
water pressure in the upper portion of the con
projects centrally upward from lower plate 26
duit and in chamber 20 tends to contract the
coaxially with the upper tubular member 21. A
bellows 25 and thereby pull upwardly on the
tubular sleeve 30 encloses the members 21 and
valve plate I6. The upper surface of the plate
29 and is slidable on member 21 as the bellows 25 I6 (within its valve seat) is of substantially the
structure elongates or contracts. A plurality of
same effective area as the opposed surface of
openings 3I are formed in the sides of tube 30
bellows 25 so that here again the water pressures
so that the space within the tubular members
acting on the valve plate IE will tend to counter
is in open communication with the space 32
balance one another. The valve, therefore, will
within bellows 25.
‘
'
'
A sleeve member 33 is attached at its upper
end to the bottom disc 26 of the bellows, and
attached at its lower end to the valve plate l6,
thus serving * as. means for raising and lowering
the'valve plate I6 as the bellows A is contracted
or expanded.
Another sleeve or thimble mem
ber 34, closed at the bottom, is attached to the
lower side of valve plate I 6 and to the inner bot
tom surface of cup 49.
This sleeve is in open
communication at its upper end (through' the
valve plate) with the aligned tubes 29, 30 and 21
within the upper bellows structure. A portion
of the thermostatic fluid within this bellows de- ~
vice is housed within the lower thimble member
34 so as to respond to temperature changes in
30
be normally controlled almost entirely by
changes in the water temperature.
It will now be noted that an auxiliary spring
42 is coiled around the inner tubes between the
upper plate 22 and lower plate 26 of the thermo
static assembly A. vThis spring is normally un
der some compression so‘ that in the vevent that
the upper bellows 25 should be perforated or 0th
erwise fail, the spring 42 will expand and open
the valve I6. This is essentially a safety device
to assure that the main valve will fail in an
open position,-if. at all, thereby preventing over
heating of the engine.
It will now be seen that all parts of this as
sembly are protected and enclosed by the me
tallic casing and can be removed from the con
the water below the valve plate while the upper
duit or replaced as a unit.
bellows assembly responds to the water tempera
The hole I‘! in valve-plate I6 permits the es
ture in the upper‘ chamber 20 above the valve
cape of trapped air and by permitting a small
plate. Since both of these water spaces are in
continuous_ circulation of the water tends to
continuous communication through ‘the passage 50 equalize the temperature of the water, both above
I7 in the valve plate [6, it will be seen that the
and below the Valve, at all times.
thermostatic assembly A is responsive to sub
The main valve will be normally closed at all
stantially the same temperature at all times no
low temperatures and ‘the spring 42 tends to
matter which side of the valve this water may
open the valve in case of failure of the thermo
be located in. Since the interior of bellows 25
static mechanism and thereby avoid overheating
and the connected. sleeve members is normally
under a partial vacuum, the valve plate It‘ will
I claim :'
normally be held up' in engagement with the
-1. In an engine ‘cooling system, means for con
valve seat I5. When the temperature of the wa
trolling the ?ow of water through a conduit lead
ter stream (and consequently the temperature to
ing from the engine to a radiator, comprising a
which bellows A is responsive) .rises su??ciently,
valve-seat ?xedly mounted in the conduit, a
the thermostatic ?uid will be expanded or va
valve-plate movable from below to and from
porized and valve plate I6 will be forced down
the
seat to close or open the valve, an expansible
wardly away from seat I5. This will permit free
bellows thermostat mounted in the conduit above
passage of the water stream through the casing
the valve seat and attached to the upper side of
assembly from the engine to the radiator. When
the movable valve-plate, a thermostatic ?uid in
the temperature of ' this water stream falls suffi
the bellows responsive to temperature changes
ciently the thermostatic structure A will be con
in the water, a thermostatic ?uid-containing re
tracted and they valve plate will again be lifted
ceptacle projecting downwardly from the plate
into engagement with its seat.
70 and connected through the plate with the ther
The lower balancing bellows B is housed within
mostatic bellows so that the bellows thermostat
the lower casing section II] and comprises a
will respond to temperature changes at both
?exible diaphragm or bellows 35 anchored at its
sides- of the valve, and a second closed bellows
lower end 36 to the bottom of easing Ill. The
member ?xed at its lower end and secured to the
bellows B' doesnot expand or contract readily in 75 lower- face of the plate and having an end por- the water.
'
'
'
V
2,408,269
5
tion of the same effective area exposed to the
water pressure as the lower face of the plate,
thus balancing the water pressures tending to
raise the plate, and the said bellows thermostat
having an end, the e?ective area of which ex
posed to the water pressure is substantially equal
to the area of the top surface of the valve ex
posed to the water pressure, whereby the valve
is substantially balanced against the water pres
7 sure.
2. In an engine cooling system, means for con
trolling the ?ow of water through a conduit
leading from the engine to a radiator,’ compris
ing a casing having an upper section ?xedly po
sitioned in the conduit and provided with a re
duced lower end forming a valve-seat surround
ing an inlet opening and having outlet openings
pansible bellows mounted within the upper cas
ing section and attached at its movable lower
end to the valve-plate, there being a quantity
of heat-expansive ?uid within the bellows so that
it will function as a thermostat, a pressure bal
ancing bellows mounted in the lower casing sec
tion and attached at its upper end to the valve
plate which end has the same effective area
exposed to the water pressure as the lower face’
10 of the plate, the thermostatic bellows also hav
ing substantially the same effective end area as
the exposed portion of the upper face of the
plate whereby the valve is substantially balanced
against the water pressure on opposite sides
thereof, and a container communicating with
the bellows thermostat and containing a thermo
static ?uid therein, and extending to a position
at the other side of the valve so that the said
in the upper end, a valve-plate movable from
bellows thermostat will respond to temperature
below to ‘engage the valve-seat and close the
valve, a downwardly extending casing section en 20 changes at both sides of the valve.
closing the valve-seat and plate and provided
WILLIAM R. PETERSON.
with inlet openings in its side portion, an ex
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