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Патент USA US2408183

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Sept. 24, 1946.
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G. wool:-
2,408,133
AUTOMATIC DRAIN DEVICE Fon cQoLIÑG sYsTEu
_Filed oef. 25, 1944v
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sept. 24, 1946. -
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ÁUTOMATIC DRAIN1 DEVICE FOR COOLING SYSTEM .
2,408,183
c Patented Sept. 24, 1,946
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2,408,183
UNITED `STATES .. 4PA'ÍÍ‘EIWÍ.' OFFICE
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2,408,133»r>
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AUTOMATIC DRAIN
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COOLING
SYSTEMS
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n» -George'WoocL Toronto, Ontario, Canada.
Application October 25, 1944, Serial No. 560,324
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(Cl. 12s-174)
5 Claims.
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The invention relates to improvements in en
gine warming devices as described in the present
'specification and shown in. the accompanying
drawings that form a part of the same.
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Like - numerals of reference indicate corre
sponding parts in the various figures.A
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Referring to the drawings. In the present pre
ferred embodiment of the inventionvlV employ
and auxiliary tank Apcomprising spaced walls I
and. 2 between `which any >desirableinsulating
4
The objects of the invention are tol provide
simple and eûicient means whereby the water,
tems of an internal combustion engine may be
materiaLÍindicated by the numeral 3, may be in
serted, whereby >to 'insurethe liquid in the tank
veasily and quickly transferred from the cooling
system, after the engine has been stopped, tol an
insulated auxiliary tank for any inoperative period
_remainingat, or near, for a long «periodof time
regardless of the condition of the outside’atmos
>`phere, - the temperature obtaining at theftime of
of the engine and thereby kept in aheated con
_insertionfinto the tank.
and oil, used in .the cooling and lubricating sys
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The tank maybe oflan'y“k desired ‘shape to Con
dition pending> further operationvof themotor,
at which time it may be quickly returned to the n veniently fit lbeneath the hood of an automobile
engine in a heated ¿statefwhereby to instantane- ’ engine, andy is shown herein. positioned above
the engine block near' thelevel of the top ofthe
ouslyheatthelengine block and insure easyV start
’ingj to'eliminateV the necessityl of usingy anti
radiator 4, but as will be apparent from the en
suing description it may be placed in any de
freeze and _thereby avoiding the corrosion Vof
metal and damage to parts usually occasioned by
sired location, and saidtank may be supported
its use; to provide efficient means for forcing the 20 in any desired manner, such as by the employ
ment of brackets 5.
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liquid to andfrom thefauxiliary tank regardless
. ~ In order to accommodate both the oil and the
of the position of such tank in relation to the
engine and radiator, to provide a device of the
type speciñed which will operate automatically ;;
water, `or other cooling liquid, the tank A _is pref
'gine kept in operation after the liquid had been
in the cooling system and the other and smaller
8 being_forthereceptionof the oil
erably divided by a vertical partition Sinto two
uponthe turning of the ignition switch, thereby 25 yseparate compartments 1 and 8 respectively, one
compartment, ,herein shown as '1, preferably be
eliminating all danger of damage to theeng'ine
ing the largerof the twov to hold` the water used
parts such as might be occasioned were‘thefen
removed from the cooling system ;' and generally ggü,f compartment
vfrom the crank case.
to vprovide a device for ,the ,purpose specified
which ~will be simple and inexpensiveto con
struct, easy to install, efficient in operation and
The'tank is provided with an opening lSiinthe '
bottom thereof ~to. permit of `.the passage of the
waterk from thecooling vsystem to the _interior of
in connection with which there will be no ‘oper
parts described in the present speciñcation and
the water compartmenty 1f of the auxiliary tank.
_Aîvalve casing l0 is secured in >any-desired
manner to the under side of the tank A with the
outlet opening [l >thereof in register with Athe
inlet Elin` saidy tank rwhereby the water may,- flow
more particularly >pointed outin theclaims for .
into and out of the water compartment 1.
ating cost.
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With the above and other obit-:cts'inxview- the '
invention consists in the novel features olfr con'
stru‘ction, arrangements and> combinations of
novelty following.
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In describing the iin/entier;y reference will’be
made to the accompanyingdrawings, in which:
' Figure l isa side. elevation of an automobile
engine and'cooling system showing the invention .
incorporated
Figure 2 is therewith.
anrenlarïged_ vertical
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sectional
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_ view
through the auxiliary tank and the liquidcontrol
mechanism,
with
shown in outline.
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the air compressing
' member
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Figure 3` is ya` centrall vertical sectional View
through the'vacuum and aircontrol valves.v
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' Figure 4 is a vertical sectional view through the
air compressor.
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Figure 5 is a vertical sectional View through
thel electric switch.
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The valve casing l0 is provided with a vertical
water passage Illa extending, completely through
same rand hasanv inlet _opening I2 in the bottom
and said'casing’is also provided with a centrally
vdisposed vertical deflecting member I3 posi-v`
tionedbetween the inlet andoutletopeningsand
spacedV at its ends Vfrom the top and bottom walls
of the casing whereby to> provide .two distinct
passagesior ,the water, the one passage Ila be
ingemployed in the transfer of the Water to the
auxiliary tank andthe other, Illa, to be used in
the transfer ofthe _water from the said auxiliary
tank,- the route being pre-determined by the- po
sition of the valve, Aas Will be describedrin detail
hereinafter,
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"The valve casing l0 is provided with opposed
2,408,183
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the purpose of providing a suction for exhausting
centrally disposed horizontal extensions I4 and
the air from the interior of the liquid compart
I5 respectively, both of which are bored to receive
ment and drawing the water into said compart
a horizontally operable valve I6 which extends
through the deflecting wall I3 and both being
ment.
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A valve 37 positioned within the outlet 35 to
closed at their ends.
CFI
the suction pipe 38 and seating on a suitable seat
The extension I4 of the valve casing II) may
within said outlet provides means for opening
be of even bore throughout its length while the
and closing the entrance to said pipe 36.
extension I5 is enlarged interiorly for a portion
The valve 3.1 is provided -.with a >stem 38 and
of its length near its outer end for the vreception
of a solenoid coil I8, the purpose of which latter 10 the lower end of the stem is pivotally connected
by means of an arm 39 with the bracket 32.
will be set out in detail hereinafter.
This arm 39 is connected intermediate of its
The valve I6 which is slidably supported in thev
length with the float arm 33, at a point removed
bores of the extension I4 and the deñecting wall
¿from the Vpivotal-point of the latter, by means of
I3 and in the bore of the portion I-S of theexten
sion I5 has a circumferential cut 29 therein near
-a 'rod 49, whereby movement of the float arm due
the end of the portion which is‘supported-within
the extension I4, adapted in the one‘position of
will cause simultaneous movement of the valve
to the rise of the liquid in the compartment 'I
3l intovengagement with its seat and thus shut
the valve to register with the passage- Illa-where
off the vacuum from the intake manifold upon
by to provide a passage for the water-fromthe
auxiliary tank A and said valve also has another 20 completion of the entry of the liquid into the
tank A and whereby downward movement of the
circumferential cut 2l adapted in another posi
vtion of the valve to register withy the passage I la
float will cause the valve to move from its seat
and admit of the operation ofthe vacuum upon
whereby to provide a passage around the Wall I3
the emptying of the tank.
for- the water from the inlet I2 -in progress tothe
A spring 4I connected at one end to the arm
»said auxiliary tank.
25
39 near its outer end and at its other end to the
The valve I6 is preferably of such length that
bracket 32 tends to accentuate the .movement of
when it is ldrawn to its ¿fullest extent into the
the said. arm 3S in its lup or down movement.
extension I4 vit -will project into'the reduced in
42 is an air vent extending through the mem
ner end vof the extension I5 just far enough to
-be properly supported »by the wall of the said re
duced portion of said extension'll5. `The valve
is provided with a stem 22 extending 4a distance
into the extension I5 andsuch stem is provided
with «an enlargement, or head, `2_3 terminating
ber 29 and having a valve '43 seating on a shoul
der «or seat therein, said valve having its stem
-44 pivoted to the arm 39 whereby oncompletion
of the upward lmovement of the float arm 33 said
valve will have movedaway from its .seat .simul
taneously with the closing of .the valve ‘31 in the
»shortof ‘the-closed end of said extension a suin
vacuum pipe and thus admit air to .the -liquid
cient distance to permit ofthe proper reciproca
compartment 13o-permit of the liquid'flowing from
`-tory movement of said valve within the casing.
The valve I5 is normally held ,fully projected
the tank in the next emptying operation, and
whereby downward movement of the ñoat will
"intmthe extension ,I4 by _means of -a coil >spring
24 «encircling the stem 22 and confined between 40 cause said -valve 43 to close simultaneously with
the opening of said valve 3'! to permit of the
the Íend of the body of the valve and a ¿flange 25
secured within the enlarged portion of the >eX
suction from the manifold functioning in the
tension l5.
It willbe obvious that when thegvalve I6 is in
next filling operation.
water from the auxiliary tank.
energised and‘thus, when the circuit'through the
switch 45 isclosed by the actuation of the float
due to the presence of water in the tank, will
45k is -a spring loaded recoilv switch of conven
lthe »position shown in Figure 2 the passage to 45 tional type ymounted on the-member 29 and hav
ing its operating arm Í45a connected to the _arm
the auxiliary tank -will be open Vand- the vertical
39 whereby movement of `said .arm in a down
outlet passage »will bey closed and 'when-the valve
ward direction will open said switch .and move
-is withdrawn fully against the pressure of the
_coil spring _2,4 the vertical outlet passage from
ment of the arm in an upward direction will close
the auxiliary tank will be open and the -inlet 5.0 saidswitch. A single wire 46 connected to the
coil side of Athe ignition switch (not shown inthe
closed and further that when the valve is in its
intermediate Vposition both said passages will be
drawings) supplies the current'to theV said switch
45.
>closed by thevcentral body of _the valve.
A ball 2l seating on an annulargshoulder 21a
The switch 45 is connected to the solenoid .18
by means of a Wire 4'I whereby on the turning on
«formed >on the wall ofthe >passage Ila serves to
close Vthe said passage _against the escape of
of the ignitionswitch, the said solenoid .will be
' The'valve housing is provided with a Isuitable
opening .21D in the bottom thereof adapted to'be
closed by a screw plug 2‘Ic.
60 cause a pull on the valve IB and causesame to
A pipe .28 leading from the lower end of the
be _drawn to its outermost position and thus
radiator andregistering with _the inlet kI2 in the
bring the cut 25 in said 'valve into register with
valve casing Iû provides a passage for the liquid
the passage Illa and thus permit of the liquid
in thedraining »and filling of the radiator and
flowing from the tank A through the valve into
engine.
65 the pipe 28 and thence to the radiator. As the
Y29 is the 'iioat control unit mounted on the top
ñoat lowers in the tank inthe emptying Yopera
of the auxiliary tank over a suitableopening 3i)
tion the _arm 45a will cause the opening ofthe
in said tank and having a suitable gasket seal
switch 45 and thus de-energise the coil I8, where
upon the `valve I6 will be forced, through theac
3l?. This float unit carries a bracket "3.2 to the
lower end of which is lpivoted one end of a float 70 tion of the spring 24, tothe left `a sufficient dis
tance to bring the valve .into the proper position
arm v33 which extends into the water compart
to close the passages Illa and IIa during the
ment 'I andrcarries on its free end a float 34.
period of operation of the engine ,as will .be de
:The member 29 is `provided with an outlet ,3.5
communicating by means of a pipe 36 with the
scribed in detail hereinafter.
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interior of the intake manifold ofthe engine _for 75 A casing 48 secured to the -under sideV ofthe
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Valve casing extension I4-has mounted thereinîa
solenoid of conventional typefdesignated by the
seats Gland 65 respectively, oppositely disposed
numeralg49, andthis solenoid is connected by a
is open the'other will be closed.
Wire 50 with the switch 45.
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in 'relation to'one another so that when. 'one valve
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Extended through the diaphragm 51 and pro
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` -A plunger 5I is adapted to be actuated bythe Cn jecting from each side thereof and adjustably
secured thereto by nuts 66 is a main valve stem 6.1.
solenoid 49 tof'an extended position through :the
This `stem carries at its ~lowerend a plungerv 68
lowerwall voi? the extension i4 and into the path
which operates’within the' chamber 54 and'at
of the-valve VI5 whereby upon the movement of
its top end, located within the collapsible casing
the said valve to the left under theinfluence of
56,'has pivotal connection 4with a transversely
the spring 24 upon the de-energization of the
extending toggle arm 69 which at its one' end
solenoid. I8' due to the breaking of the connec
"is pivoted to a suitable bracket 10 depending
tion in the switch 45 the Valve will be held in such
from the top member 59.
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a position as to close both-of the passages ylila
Extending upwardly from the toggle arm 69
and I la so that the water from the cooling system
cannot be drawn into vthefauxiliary tank, r>even 15 are valve stems 1I. and 12 respectively carrying
valves 13 and 14 adapted to seat’on the valve
though aà vacuum is held in said tank, >until the
seats 84 and 65.
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ignition fhas been shut off to de-e'nergise vthe sole
The valves 13 and 14 are loosely mounted on
noid 49 and thus permit offthe plunger receding
the stems and are spring pressed towards their
into the casing'48 out of the path of the valve- I6.
"Whenv the plunger' has lmoved out. 0f_ the path of 20 respective seats by coil springs 15 confined-be
tween pins 11 and the respective valves. '
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the _valve due to the ignition having'been. turned
A coil spring 18 extending lengthwise of the
oiî‘tl'ie said'valve is >allowedto proceed to the left
toggle arm 69 and connected at its ends tovsaid
to _the full limit,v in kwhich case the passage `Ila.
arm near- the opposite ends of _the latter pro
isä‘fopendîorv the passage ¿ofthe water from the
engine _tothe auxiliary _¿ tank; vIt _is1of,y„cour_se
25 vides means for Vaccentuating the vmovement of
said arm towards a true horizontal position.Y
V19 is a coil spring of relatively lesser strength
emPlQYed lio moregquíckly efîeßtthe recession of
than
the spring 58 and located between thek
the plunger. ’
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Ylower wall, 55 of the casing 52 and the under
_f The plunger ¿5I is so positioned in relation to
of the diaphragm 51 forthe purpose of
the valve -_that itbears Vagainst the under face-cf 30 surface
compensating for the weight of the diaphragm
obvious _that if desired spring means may be
theâ'said valve _when the .latter kis in its innermost
position and is held from its extended position
and» the pump plunger.V
until the valvehasprogressed to therightsufii
_cientlyiar'to allow-it to enterrthe valve'casing
with an air vent 88.
and> provide means for limiting the _return move'
mentÀ of the valve.
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Where the auxiliary tank A is located below the
level of the top of the radiatonïmaking the return
of vtheliquid to the cooling system by gravity im
possible, it is necessary _toy provide suitable pres
sure means to force-theliquid from the tank to
the 'cooling system'. y This is accomplished, through
the medium o_f air compressing mechanism oper
able by the suction from theengine manifold and
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provided
The lower wall 550i the casing 52 is
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' 8l is a cylindrical casing threading on to the
lower end of the tubular member 54 and‘provid
ing a compression chamber in longitudinal align
ment withv the interior'oi the said member 54,
said-casing having a lateral-tubular extension l8l
40 cappedy by a threaded closure '83,' which latter ì
hasian' air inlet 84 therethrough.-- ‘
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A plate y85 extends across the inlet 84 'within
the closure land. is yieldablyheld 'over said inlet
by a spring ñnger >86.V
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broadly consistsin the use >of a low vacuum lifting 45 l The casing` 8| has a 'transverse partition v81
a- diaphragm ofcomparatively largearea includ
ing acoil _spring which, whenrtheY vacuum isere-V
leased,„exerts its energy to compress sufficient
air to force the water, and the `oil if desired,îback
into'thecOOIing system.
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y ln> the compressing means shown herein 52 is
locatedl below the level'of- the inlet 84 whereby to
'provide' between it and the end wall 88 a cham
ber
89.
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~ The partition 81 -has a centrally disposed out
50 let 90 leading to the interior of the chamber 8_9
and .in-'this chamber is located a check valve 9|
a vcylindrical casing provided with a head 53
spring-held overthe opening 90 Iby means of a
bolted or otherwise’secured thereto and at its
lower end having a central cylindrical chamber
spring 92.
54 positioned partly within andk partly without
theend wall 55.
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A collapsible bag'or _casing 56, preferably made
of rubber orother suitably flexible material has
its open end >secured between the _top end of the
casing 52 and the head 5_3 .andrdepends down
wardly a considerable distanceA into the said cas
ing 52 and is provided-at its lower end `with a
diaphragm
51.
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v `The lower end of the casing is provided with a
55 downwardly extending nipple 93 to 'which is Ase
cured by means of a suitable fitting 94 apipe S5
which leads to the interior ofthe auxiliary tank
A through the top wall of the latter.
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` The operation of the inventionhereinbefore de
,60 scribed `is as follows commencing from the stage
wherein the ignition has been shut off and the
Water from the radiator is in process of being
drawn into vthe auxiliary tank by means of the
suction in »the tank created by the engine pre
ber 59 and the diaphragm 51 provides means for 65 viousfto the ignition being shutoff, in‘which case
' A coil Aspring 53 conñned between the top mem
influencing the collapsible member 55 towards its
extended
condition,
' The headA 53
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provided with parallel outwardly
extendingopenended Lvalve casings r59 and 68
respectively, the casing 5,9 having connection with
the interiorof theengine manifold through the
mediumofa pipeöl andthe casing, 65 havinga
closure _B2 threading thereover, which said closure
isv provided with anA air ventv 63. , v
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¿Tee Valve gasses-5S and were, provided, with
the valve I6 and other elements are in the rela
tive positions shown >in Figure 2, with the valve
31 in theA suction `line open-and the valve 43A in
the air line closed.
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»Asvthe‘water rises in the tank the iloat 34 is
raised to the-'extent that upon the‘completio-n
of theentry of waterinto the tank the ’valve 31
will be closed andthe air valve 43 opened in prep
aration for the next operation, which will be the
75 returning of the 'water to the cooliri'g'systená,y and
2,408,183
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the connection inthe switchAE Will be closedîin
preparation for the turning .onof `the ignition
.and water :are Aused :as cooling . agents duplicate
parts/.as described hereinbefore can be provided.
when it is desiredtozstart .the engine. AWhen the
As the cooling liquid 'is completely protected
water-has all been transferred .tozthe `tank VA the
from the elements while it'isin .the storage tank
ball 121 `will be held to its .seat inthe passage ¿l la C11 vA it is clear that during any reasonable `period
and thus seal the tank against the escape of water.
>of time same Vwill retain practically al1 of ‘itsheat
The operating parts remaininthe above :recited
with the result that .uponlitsreturn .to the engine
relative positions during 'the».periodithatgtheîigni
it' will instantaneously heat the'engine parts :and
tion is off.
thus insure-easy starting.
When it is desired to again operate the engine 10
The invention is »particularly adapted for luse
the ignition is'turned onfand the engine started.
in air craft, both Water and air cooled. ‘In-the
This has the effect of energising the solenoids t8
case of air cooled engines the water compartment
and ¿9 with the result that‘the valve Iß'is in
ofthe auxiliary tank is dispensed with.
stantly drawn to the right to itsfull extent where
Air cooled craftthat `ily in very low tempera
inthe passage l la to the tank Ais closed and
tures vmust have their sumps drained upony land
the cut V2l) in the valve is brought into alignment
ing and in order to facilitatesubsequent starting
with the passage lila whereby to permit ofthe
the oil may be heated before being returned'vto
Water flowing from the said tank to the engine
the crank case and this device will provide-means
and radiator.
for accomplishing this conveniently.
When the valve I6 in its movement to the right 20
In the case of water cooled- high speed lighting
passes beyond the plunger 5| the latter, due `to
planes sufficient time has to be allowed after start
the inñuence yof the solenoid 4S, rises intozthc
ing the engine to warm the entire system'before
valve casing and provides .a barrier to the valve
the throttle vmay be opened with safety. They
on itsreturn movement, whereby to holdthe said
are thus earth-bound `for a considerable period.
valve to an intermediate position to close both 25 By providing a source of instantaneous heat lfor
the passages I Da and lla during the operative
the engine system by the use of the present in
period ofthe >engine as will be .explained-in detail
vention
this dangerous period may be consider
hereinafter.
ably shortened.
The reciprocal movement imparted to the valve
I have illustrated and described the pres
'I3 by lthe suction in the Ymanifold causes like 30 entWhile
preferred form of construction lfor carrying
movement of the air valve 'I4 and the diaphragm
out my invention, this is capable of variation vand
51 is alternately raised andlowered through the
modification without departing from the spirit
connection between the arm 69 and the valve
of the invention. I, therefore, do Vnot wish to be
stem 61. This operates the plunger-E8 which com
limited to the precise details of constructiongset
presses the air in the chamber in which said
forth, but desire to avail myself >of such varia
plunger operates -and rforces said air outwardly
tions and modifications as come 4within-the scope
through the pipe-55 and into the top of the tank
of
the appended claims.
A, whereby the liquid in said tank is forced out
What I claim is:
wardly and returned to the engine and radiator.
1.’In an engine warming device, in combina
In the emptying of the tank A the float ‘34 40
tion 4with an internal combustion engine and the
lowers and when it has reached a predetermined
cooling system thereof including a radiator, an in
point the connection `in the Vswitch 45 is broken
sulated liquid storage tank, a vacuum-pipe 'lead
and the solenoid |8'thereby vdemagnetised7 imme
ing from the 'manifold of Athe engine to the in
diately upon which the spring v24 -forces the valve
I6 to the left to the point Where the end of .said 45 terior of said tank at or near the top of the lat
ter, a valve `casing-having -aport in -eachof two
valve contacts the plunger 5l„wherein-the valve
substantially opposed walls and spaced liquid pas
is located in Ysuch a position yas'to effectually close
sages communicating with said ports, one of Vsaid
both of the passages ma and lla and thereby
ports being in communication with the lower in
prevent the liquid in the cooling Asystem returning
to the tank A during the operation of :the engine. 50 terior of said tank, a conduit >leading from the
other of said ports to the radiator, acheck valve
The downward movement-of the float arm in the
located in one of said liquid passages, a valve
emptying of the tank A in the meantime ‘has
movable across Isaid liquid passages, said valve
closed the valve 43 in the air line and hasA opened
having >two spaced circumferential grooves spaced
the valve 3l in the suction line preparatory ytothe
next-operation of .transferring «the waterfrom
the coolin-g system to the'tank.
When it is desired to transfer the water tothe
tank A for a period of inoperation- of thegengine
itis simply necessary to turn olf the_ignitionv to
at variance-with the vspacing of said liquid pas
sages whereby in one position of lsaid valve~one
of said circumferential grooves will be _aligned
with one ofsaid liquid passages only to permit of
the flow of -liquidto said tank, in another posi
tion the other of said-grooves will be alignedwith
de-energise the -solenoid 48 -whereupon -the
plunger 5I drops out of thepath ofthe valve 60 the other of said liquidv passages to permit of the
flow -of liquid from said tank and in Aanother
IB-and allows same under the inñuence of Vthe
position both of said liquid passages willbe closed,
spring 24 to force the valve to its extreme leftmost
a float controlled by level of the liquid in said
position to bring the cut«2l into alignment with
the passage yl la to permit of -the `.water ~passing 65 tank,` an air relief passage associated with said
tank, means controlled by said ñoat for closing
to the tank A under the inñuence- o_f the yacuum
said vacuum pipe and opening saidy air relief pas
sage simultaneously When the liquid _has been
transferred to said tank and opening _said vac
num pipe and closing said air relief Apassage when
from the cooling system of the m-achinefto the
auxiliary storage tank and _the return thereofit 70 the liquid has vbeentransferred to said cooling
system, and, float controlled electrical means
is of course understood that in the case ofgaero
adapted, in the raised »condition ofsaidfloat due
plane and other air cooled- engines the invention
vto the presence of liquid in Asaid tank to -move
may be Áemployed to transfer the-oilçfromftne
created by the engine Vbefore beingyshllt :0;1Í.
While the invention has beendescribedçhere-in
principally as relating to the transfer «ofgthe'water
engine to the storage -_ tank .and »where both -_oil
said valve to close‘the liquid passage in» said lvalve
casing to said tan-kand-to open'the liquid passage
2,408,183
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from said tank and in the lowered position of
said ñoat holding said valve to a position wherein
both of said liquid passages are closed.
2. In an engine warming device, in combina
tion with an internal combustion engine and the
cooling system thereof including a radiator, anv
insulated storage tank, a vacuum pipe connect
ing the top of said tank with the manifold of
the engine, a conduit connecting said tank with
said radiator for the transfer of liquid from one
to the other, a valve casing interposed in said
sure pipe leading from the enginemanifoid to the
top interior of said tank, and means interposed
in said pressure pipe subject to the impulses in
said manifold to compress air and force same into
said tank to force the liquid from said tank into
the radiator upon’the movement of said valve to
a position to open the liquid passage from said
tank.
,
4. In an engine warming device, the combina
10 tion of an engine and its cooling system includ
ing a radiator, a liquid storage tank, a conduit
conduit, said valve casing having parallel liquid
connecting said storage tank with said radiator,
passages communicating-at their ends with saida vacuum pipe connecting said tank at the top
conduit, one of said passages being for use in the
thereof with the engine manifold whereby the
flow of liquid to said tank and having a check 15 liquid is drawn by suction from the cooling sys
valve therein to prevent the escapeof liquid from
tem through said conduit, a valve interposed in
the tank and the other of said passages being for
said conduit, said valve having three positions, in
one of which the liquid is permitted to flow lto
use in the flow of liquid from said tank, a valve
movable across said liquid passages within said
said tank, in another of which the liquid is per
casing, Asaid valve having two circumferential 20 mitted to flow out of said tank and in another of
grooves spaced at variance with the spacing of
which the said conduit is closed against the flow
said liquid passages, said valve being spring in
of vliquid to or from said tank, said valve being
iluenced to a position in which the liquid passage
spring influenced to the ñrst mentioned position,
to said tank will be open, a iloat controlled` by
a float adjustable through the variations of the
differences in the level of the liquid in said tank,
level of the liquid in said tank, an electric cir
means operable by the iloat on the emptying of
cuit including a solenoid for said valve, means
ractuated by said float in its movement in the ab
the tank to open said vacuum pipe, and on'the
ñlling of `the tank to close said vacuum pipe,
sence of current in the electric circuit to close
said circuit whereby on the electrifying of the
an electric circuit including a circuit closer ac
circuit saidv valve will be drawn against spring
tuated by „said float to a closed condition at the
completion of the flow of liquid to said tank
influence to a position to permit liquid flowing
whereby on the turning on of the ignition to move
from said tank, means actuated by said float for
said valve against the spring influence thereon
opening said circuit through said solenoid upon
to close the passage to said tank and open the
»the emptying of said tank and for closing said
passage from said tank and on the completion
circuit upon the filling of said tank, an air inlet
of the emptying of said tank actuated to an open
to said tank,vmeans operated by said iioat adapt
condition whereby to release said valve, said elec
ed on the completion of the ñlling of said tank
tric circuit also including means’for arresting the
to close said vacuum and open said air inlet and
return of said valve> under the spring influence
on the emptying of said tank to open said vac
at a point to close both of said liquid passages 40 uum and close said air inlet, and air compress
during the period the ignition is on.
ing means operable by the suction from the en
3. In an engine warming device, the combina
gine manifold to force the liquid from said tank.
tion of an engine and its cooling system including
5. An engine warming device according to
claim 4, in which said air compressing means
av radiator, aninsulated storage tank, a vconduit
connecting said tank with `said radiator for the 45 comprises a main casing having a valve con
transfer of liquid from one to the other, a rvalve
trolled outlet to said vacuum pipe and a valve
casing interposed in said conduit, said valve cas
controlled air inlet, the valves in said vacuum
ing having parallel liquid passages therethrough
pipe Vand in said air inlet being oppositely di
one of which is used in the ñow of liquidto said
rected, said casing at its lower end havingY a Valve
tank and having a check valve seating therein 50 chamber leading downwardly and communicat
to prevent the escape of liquid from the tank and
ing at its lower end with a compression cham
the other of which passages is for the flow of
ber having a valve controlled air inlet and also
liquid from said tank, a valve movable across‘said
having a valve controlled outlet to said tank, a
liquid passages, said valve having two circum
collapsible air bag located within said main cas
ferential grooves spaced at variance with the
ing and open at its top end to said outlet to said
spacing of said liquid passages, spring means in
vacuum pipe and to said air inlet, a pivoted arm
iiuencing said valve to a position in which one of
having connection at points therealong with the
said circumferential grooves will be in register
respective stems of said valves in said vacuum
with the liquid passage to said tank, an electric
pipe and said air inlet, a main valve rod `having
circuit including a, solenoid adapted to actuate 60 pivotal connection at its top end with said arm
said valve against the influence of -said spring
to which the stems of said valves in said vac
means to bring the other of said grooves into
uum pipe and said air inlet are connected and
register with the liquid passage used inthe i'low
extending downwardly through the lower closed
end of said air bag and carrying a plunger oper
of liquid from said tank, a circuit closer, a fioat
actuated by the level of .the liquid in said tank
ating in said valve chamber in the lower end of
and operating said circuit closer to energise said
said main casing, a coiled spring within said air
bag inñuencing said air bag to its extended con
solenoid, electric means unaffected by the action
of said circuit closer adapted upon the opening
dition, and a coiled spring of relatively lesser
of the electric circuit and the consequent re
strength than the spring in said air bag located
lease of said Valve to arrest the movement of 70 between the lower end of said air bag and the
said valve at a point to close both of said liquid
lower end of said main casing adapted to exert
upward pressure on said air bag.
passages, a vacuum pipe connecting said tank
with the manifold of the engine whereby the
GEORGE WOOD.
liquid is drawn by suction into said tank, a pres
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