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Патент USA US2133226

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bet. 11, 1938.
A, G HANN
, 2,133,226
CONTROL DEVICE
'3 sheets-sheet 1
Filed Jan. 29, 1955
000000000“
lb0000000000
BY
#4 AT 4 NEY
Ogt. 11, 1938.
.
'AHG. HANN-
2,133,226
CONTROL DEVICE
Filed Jan. 29, 1935
3 Sheets-Sheet '2
'56
mvENToR
BY W
?’é/ATTO
EY
'
Oct. 11, 1938.
2,133,226
A, G. HANN
CONTROL DEVICE
Filed Jan. 29, 1935
3 Sheets-Sheet 3
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79 68 64
I20
"
INVENTOR
“
W 9. M
BY
v
‘did ATTO NEY
I
Patented Oct. 11, 1938
2,133,226
UNITED STATES
PATENT OFFICE
2,133,226
CONTROL DEVICE
Albert G. Hann, Detroit, Mich., assignor to ‘De
troit Lubricator Company, Detroit, Mich., a
corporation of Michigan
Application January 29, 1935, Serial No. 3,905 ,
17 Claims. (Cl. 137-68)
My invention relates to control devices and ranged in the oil line between the tank 2 and the
more particularly to devices for controlling the furnace 3 for maintaining a predetermined sub
?ow of liquid.
r
stantially constant ?ow of oil to the burner, re
One of the objects of my invention is to pro
gardless of the quantity of oil in the tank, and
5 vide a new and improved gravity feed control this control device includes a substantially rec
device for controlling the flow of liquid.
tangular shaped casing 4 having a substantially
Another object of my invention is to provide rectangular shaped main chamber 5 in which the
a device for controlling the flow of liquid, oper
level of the oil or any other liquid is maintained
able among other uses for controlling the flow of at a predetermined substantially constant level
oil by gravity from a reservoir tank‘ to an oil by control mechanism arranged thereinv and
burner, and to provide a control device for this hereafter described. A cover 6 is provided to 10.
purpose having a new and improved arrange'—' close the chamber 5 and may be ?xed to the eas
ment of the operating parts thereof.
ing 4 in any suitable manner, such as by the
‘The invention consists in the improved con
screws 8. The control device may be mounted,
15
struction and combination of parts, to be more such as by the bracket 1, ?xed to the furnace
fully described hereinafter and the novelty of wall, or in any other suitable manner so as to 15
which will be particularly pointed out and dis
permit oil to ?ow preferably by gravity from
tinctly claimed.
chamber 5 to the oil burner.
In the accompanying drawings, to be taken as
In the casing and below chamber 5 there is
20 a part of this speci?cation, I have fully and
provided a second chamber I0 into which the oil
clearly illustrated a preferred embodiment of or other liquid ?rst enters through passageway 20
my invention, in which drawings—
I l and in which chamber it is ?ltered before en
Figure 1 is a view shown in side elevation of. tering chamber 5 through communicating pas
an oil burning apparatus employing my im
sageway I2. The chamber l0- extends beneath
25 proved control device with a gravity feed chamber 5 substantially coextensive therewith
system;
and with the inlet port ll located at one end in
Fig. 2 is a top plan view of the control device the bottom wall of the casing and with passage
with its cover removed to show the arrangement way I2 located in the other end of-chamber l0.
of the operating parts thereof;
Preferably, the chamber I 0 is in the form of a
30
Fig. 3 is a side view shown in cross-section cylindrical bore .having an ‘opening 9 to receive
taken along the line 3-3 of Fig. 2;
a cylindrical shaped strainer H. The strainer l3
_ Fig. 4 is a top plan view of the control device
may
be formed of any suitable ?ne mesh wire,
with the cover in place‘;
preferably having its inner end l5 closed such
Fig.
5
is'a
detail
view
of
an
oil
strainer
shown
35
removed from the casing and embodying features ' as by a‘ cap H5 or other suitable closure member and
having the outer end I‘! open and provided ‘with 5
of my invention;
‘
‘Fig. 6 is a side view shown in cross-section
taken along the line 6-5 of Fig. 2;
Fig. 7 is a fragmentary end view partly broken
away and in section to show the outlet valve
structure embodying features of my invention;
Fig. 8 is a fragmentary view shown in cross
)
In order to support the strainer within the
chamber I0 and tightly seal the chamber against
leakage and to do so in a manner so that the
strainer may be readily assembled and/or dis 40
assembled with the chamber, I provide a closure
section similar to Fig. 7, showing the valve in
member l9 slidably insertable in the chamber ill
another position, and
with its inner end slidably telescoping the open .
_
Fig. 9 is a fragmentary view of the inlet valve
structure shown in cross-section taken along the
line 9—9 of Fig. 3.
L1
a tubular extension or collar l8.
‘
>
'
Referring to the drawings, and more partic
ularly to Fig. '1, there is shown my control device,
designated in general by the numeral I, having
among other uses the controlling of the ?ow
of oil by gravity from a reservoir tank 2 to an
oil burning furnace 3. ‘The control device is in
communication with the oil burner through the
5 OI
conduit or pipe 3‘. The control device is ar
end ll of the strainer l3.
The closure member
I9 is preferably formed having a. cylindrical
shaped portion or shank 2| which slidably ?ts into
the cylindrical bore or chamber Ill and extends
part-way thereinto. The closure member I9 is
provided with an external laterally extending 50
?ange 20 providing a shoulder for seating against
the outer wall of the casing. Between the ?ange
20 and the wall of the casing, a washer or suitable
packing material, indicated at 2|“, may be pro- '
vided to insure a tight leak-proof connection.
u
2
$3,188,926
Besides serving as a closure member and sup
By applying the clamping pressure at the end of
port for the strainer is, the closure member is
also provides a means of obtaining communica
tion between the inlet port ii and the interior
of the strainer. To this end the closure member
the closure member and" axially of the strainer
bore by means of the screw lipositioned o? cen
ter, it will be readily understood that there is no
tendency to move or tilt the device when tighten
~ I! is provided with longitudinally extending cen
tral bores 3i and 32, the larger bore 3i being
located at the inner end oi the‘ closure member
ing the screw 26.
'
’
'
As the strained oil enters the chamber 5 it is
metered by a valve 40, operated by control mech
I! thus providing when in operable position, an ‘ anism within chamber 5 to maintain a predeter 10
internal
and inwardly facing shoulder 33. The mined substantially constant liquid level therein.
10
tubular extension or collar E8 of the strainer 13 The valve structure, which is more clearly shown
slidably telescopes within the larger bore it of the in Fig. 9, includes a ?tting ll, having one end 42
closure member l9 extending part-way into the externally threaded for threaded engagement
the internally threaded aperture of} passage
closure member and seating against the shoulder with
way
E2.
The ?tting it extends vertically upward
15 33. Preferably a tight fit is‘desirable between from the bottom wall of the casing and is pro
the collar l8 and bore 3| to prevent the escape
vided with a central bore 44 in its upper end and
of liquid therebetween and also to prevent acci
dental separation of the strainer and the closure a central bore 45 in its lower end in_ communica
member. To obtain such a lit, the collar I‘ may tion with bore 44 by means of a relatively small
er bore 46 providing an upward facing seat 41
be formed with a slightly larger external diam
eter than the diameter of bore 3! and be slit, and valve port for the valve 40. The valve 40 is
as at 34, so that it can be slidably spring ?tted , preferably formed at its lower end with a sub
stantially conical shaped portion 41' cooperable
into the‘ relatively small bore 3|.
the valve port to close the same. Laterally
A portion of the shank 2i is formed intermedi-_ with
extending
bores #8 through ?tting 4| provide 3
ate its ends with an external reduced portion pro
viding ‘an annular slot 35 which cooperates with communication between bore 44 and the interior
the inner wall of chamber I0 to provide an annu- ‘ of chamber 5. The valve 40 which is reciprocable
lar passageway 36. When the closure member is in the ?tting has a vertically extending stem por
tion which extends part-way above the top of the
in position in the chamber II, the annular pas
sageway I6 is in alignment with the inlet port ll ?tting and to the upper end of which is rigidly 7'
?xed a collar 49. The upper end of the ?tting 4|
of the casing and in open communication there
with. The inner central bore 32 extends from is provided with a guide member 50 preferably an
apertured cap, sleeved over the end of the ?tting.
bore 2| only part-way into the shank, terminat
A bracket 5|, ‘preferably substantially U
ing at a point adjacent the annular slot SI so that
\radially disposed apertures or passageways 31
through shank 2| establish communication be
tween the annular passageway 2i and the bore 32.
Oil entering the inlet port H passes into the an
nular passageway 36 and then through radial
passageways 31 and bores 32 and 2! to the inte
45
shaped, is rigidly clamped to the bottom wall of .
the casing by the ?tting ll which passes through
an aperture in the base II of the bracket. The
sides N of the U-shaped bracket extend up
wardly on- opposite sides of the ?tting ll and are
connected at their upper ends by a horizontally .
rior of the cylindrical strainer l3. After the oil extending bearing pin 58. Fulcrumed on the pin
is there is a lever 51 bifurcated at one end to pro
is strained by flow through strainer ll into cham
ber II, it passes from chamber II to chamber ‘ vide parallel arms 58 to receive the upper end of
the valve member or collar 49 and which extend
through passageway l2. W
‘
\ In order to securely ?x the closure member I! between the substantially horizontal ?anges of the 4;
tightly against the casing and to do so in a man
her so that the strainer may be easily assembled
and/or disassembled without danger of tilting the
casing and generally upsetting the normal func
50 tion of the control device commonly occurring
when a wrench is applied to a threaded closure
1 member, I provide a clamp or lever arm '22 ar
ranged to extend across the ?anged end of the
closure member and having a portion intermedi
55
ate its ends in contact with the closure member,
the pressure applied to member ll being applied
at the clamp ends either side of the closure mem
ber) In the present construction, the clamp 22 is
,L-shaped and hinged at one end to the casing at
one side of the ?ange 2|, as at 24, the other end
being provided with an aperture 2‘ for receiving a
screw 26 or other suitable detachable holding
means. The casing is. also provided with a
threaded aperture 28‘ positioned on the oppodte
collar 49,. The other end of the lever 51 has a
that ‘I rigidly ?xed thereto, the ?oat preferably
being su?lciently heavy so that it normally ?oats
with the greater portion thereof submerged.
‘The ?oat 60 is preferably a relatively large cy- '
lindrical member of shallow depth having a hori
zontal area extending over substantially one en
tire end portion of the chamber 5. The valve ll,
operated by the ?oat, is located in the opposite
end of the chamber 5 from ?oat 60 thus permit 55
ting along lever arm 51 between the. large ?oat 60
and the fulcrum point. Normally a relatively
large ?oat having a good leverage will emciently
operate to close tightlythe valve 40 against rela
tively high oil head pressure when the liquid level i‘
in the chamber 5 rises to the predetermined sub
stantially constant level.
I
'
In order to be sure that the valve 40 will close
when the liquid level rises ‘above the predeter
mined constant level and which the float 60 might
side of member I! for receiving the screw 20. " fail to do because of grease or other foreign mat- ,
Preferably the clamp is arranged so as to extend
across the ?ange 2| at the center thereof and is _.
provided with a tapered protuberance 28 for en
gaging the ‘member ii. The outer end of the
70 closure member I! is preferably provided with a
conicalrecess 29 for receiving the protuberance
' 28, thus obtaining a single point contact at the
center of the closure member at which the pres
sure is brought , to bear when the clamp 22 is
75 drawn toward the casing by means of the screw 2‘.
ter collected between the valve and the valve seat,
I provide a safety device or secondvalve actuating
device which is also disposed within chamber 5.
‘This second valve actuating meansv includes a
toggle device normally inactive but arranged so
as to have a potential force which when released
operates to close the valve with such force as to
crush out all foreign matter between the valve
and its ‘seat. The releasing of the toggle device is ‘i
3,
2,138,226
controlled by a second ?oat 62 relatively small
compared to ?oat 68, which smaller ?oat is also
disposed in chamber 5 and arranged so as to be I
sensitive to the rise in the liquid level above the
predetermined constant level.
The toggle device comprises in general a bear
ing member or‘ support 63, a lever 64 and a coil‘
spring 65 held in compression between the bear
.ing member 63 and lever 64. The toggle device
10 is arranged at the top of the chamber 5 with the
the lever 64 inclined slightly downward or past
center is the normal inactive position of the de
vice, and because of this ‘arrangement with the
spring 65, the lever 64 has a potential force or
tendency to pivot downwardly against the valve
48. A second lever 88 is provided and pivoted at
one end adjacent the end wall 11 by means of and
on a horizontally extending pin 6| fixed in par
'allel side walls adjacent the end wall 11. The
lever 88 is preferably provided with a depending
lever member 64 extending over the end of the
portion 82 in the form of a catch having a hori
vertically extending valve 48, for operating the
zontal latching portion 83 normally supporting
the lever 64, the lever 64 having a lug or laterally
extending portion 84 normally bearing on or en
gaging the latch. The lever 88 includes a rela 15
tively short arm 85 extending on the other side of
the pivot point 8| from ?oat 62 and through the
slotted aperture 16 immediately abovethe arm
portion 15, the purpose of. these two externally
same when released; The lever arm 64 may be
formed of sheet metal, if desired, having a hori
15
zontally disposed portion 66 and preferably sub
stantially vertically and longitudinally extending
reenforcing side ?anges 61 and 68. A downward
ly extending portion or projection 18 may be pro
vided on the underface of horizontally disposed
portion 66 of the lever 64arranged for engage
ment with the top end of the valve 48 to reduce
friction between the pivotable lever 64 and the
reciprocating valve. The lever 64 is pivotally
supported at one end, and adjacent the end wall
25 69 of the casing, the ?anges 61 and 68 being pro
vided with aligned slotted apertures running out
at the ends for receiving a horizontal bearing pin
projecting le'ver portions being hereafter de 20
scribed. It will be understood that the toggle de
vice can not go over center in an upward direc
tion because of the lever arm 85 disposed im
mediately above the arm portion 15 of the lever.
64, the underside of the lever 85 being below the
center of the toggle device.
'
,
The second float 62‘is also disposed in chamber
5 and is preferably pivotally connected to the
other end of the lever 88, as at 86, for controlling
the releasing of the toggle means. The ?oat 62 is
located in the opposite end of the chamber 5 from
the pivot point 'of its lever 88 ‘and at one side of
the valve structure. This ?oat has a horizontal
area preferably relatively‘ small compared to ?oat
68 but having a relatively greater depth than?oat
68. A wall or partition means 81, which may be
1 I. The spring 65 maintains the lever 64 in bear
ing engagement'against the pin 11 and by reason
of this slotted bearing, it will be seen that the
lever 64 can be readily removed by compressing
the-spring 65, after which the valve 48 can be
lifted out of its housing thus facilitating assembly
of the parts and rendering them easy to remove
to clean or repair or replace the same. The bear
ing pin 1| is arranged adjacent to the end wall 69
of the casing so that the lever 64 can be as long
'80, .
an integral part of the ca_sing,as shown,surrounds
the ?oat 62 in close proximity thereto providing
as possible to obtain good leverage, and this hear
ing pin 1| may be supported in the opposite cas
a chamber 88 which the ?oat substantially ?lls.
ing side walls adjacent the end wall 68. To pre- " The wall means 81 extends vertically upward
vent side movement‘ of the lever 64, it may be from the bottom wallof the chamber 5 and to a
provided with a slot 13 to receive a vertical rib 14
integral with the casing wall 69 and which ex
tends into the chamber 5.
45
point above the predetermined constant liquid
level, as indicated by line L—L, Fig. 6. The wall
of chamber 88 is provided with a cut-out portion
,
By having the lever 64 pivoted at one of its ends
and substantially at the extreme end of chamber
5 and by having the valve structure arranged‘ in
the same end of the chamber 5, it will be seen that
the point of engagement of the lever 64 on the
50 valve 48 can be near the pivot point thus obtain
ing a relatively long lever arm on the other side
of the contact point. The lever 64 extends from
its pivot point preferably at a slight downward , .
angle, or off center, with the ?ange 68 extending
the full length of the chamber 5 and projecting, as
at 15, through a slotted aperture 16 in the op
posite end wall 11 and extending externally there
of. The ?ange 61 and the horizontal portion 66
of the lever terminate within the chamber with
_ the ?ange 61 extending slightly beyond the termi
nating point of the horizontal portion 66, as at
18. The pin or bearing member 63 is preferably
rigidly ?xed in the end wall 11 of the casing and
in the same horizontal plane and in alignment
with the end 18 of the ?ange portion 61. The
ends of the spring 65 may .be provided with cir
cular shaped bearing members 16 having central
depressed recesses-19a for receiving the bearing
70
' members 63 and 16 which are preferably tapered
or pointed, as shown in Fig. 3, thus. having single
point bearing engagement with the members 19
to permit ready movement of the lever 64 and
?ow edge or‘ dam at a point preferably slightly
above the constantlliquid level, and through or
over which the liquid ?ows when it exceeds such
level in chamber 5. By means of the close ?t of‘ 50
the ?oat 62 in its chamber 88 and its occupying
practically all of itschamber, it will be understood
that upon over?ow of the liquid from chamber 5
into chamber 88 the ?oat 62 will rise quickly and
substantially immediately after over?ow occurs,
thus pivoting the lever 88 and releasing the toggle
or valve actuating means to positively close the '
valve.
In the present disclosure, the control device has
two outlet valve structures for accommodating 60
two burners, but since these valves are the same
in structure and operation, a description of one is
deemed su?cient. Referring to Figs. 7 and 8
in which views one of the valve structures is
shown in detail, the valve structure is preferably 65
located at one side of the casing and includes a
valve chamber, the wall means 98 of which may
,be, as shown, an integral part of the casing, if de
sired. The wall means 88 extends vertically up
ward within the chamber 5,'and the top portion 70
9| is preferably tubular in form.- The valve
chamber includes a relatively largev vertically ex
'
tending bore 82', in the upper portion thereof, for
receiving the valve stem 84, which valve stem is
‘The arrangement of the toggle device having
relatively smaller than bore 82 so that there is a
reduce friction between the parts.
75
45
or recess 89 in its top edge establishing an over
In
4
8, 188,226
space 95 surrounding the valve stem and into
which oil enters through an aperture 86 from
chamber 5. Preferably the aperture 96 is in the
wardly extending portion or lug ll8_, the lower
tiveiy.
indicated at 95‘, Fig. 8, extends higher than the
edge of which is in the same vertical plane as the
cam face ill for engagement therewith, and if
form of a slot extending from the top of the wall‘ desired the lug H8 may be an integral part of
means 90 to a point adjacent the bottom wall of the wall of the sleeve member, as shown. A coil
spring l2! surrounds the valve stem 95 and is held
chamber 5. The relatively large bore 92 also ex
tends to a point adjacent the bottom wall of under compression between the cam followerv H5
chamber 5, at which point a relatively small bore and the underside of the cover 6 to resiliently
81 concentric with bore 92 provides an upwardly maintain contact between the follower and the
10 facing seat 98 for the beveled face 89 of the valve. cam when they are in engagement and to urge the It
A bore I0! is provided which extends from the valve against its seat 98 when the follower I I5
bottom wall of the casing to a point adjacent and cam H4 are not in engagement. It will also
bore 91 and which may be threaded to receive a be seen that upon closing rotation of the valve
threaded closure plug IN. A relatively smaller stem 84 the spring [2! aids to move the valve
15 bore I03 serving as the valve port connects bores toward its seat. The slot 96 extending through 15
8‘? and Hill and \slidably receives the lower end the upper end of the valve housing 90 pro
vides a break or opening in the otherwise con
portion of the valve which is diametrically re
duced, as at "2, to slidably fit the same. Thus, tinuous camface ill and preferably the slot 95
is located relative to the cam face “4 so as to
annular chambers I“ and 105, Fig.8, are pro
20 vided between the reduced diametrical portion provide a space between the highest and lowest 20
points thereon. One side face of the slot 96 as
“32 and the walls of the bores 91 and I" respec
other and cooperates with the lug M8 to provide
The valve stem is provided with a central longi
tudinally extending bore I66 which opens through a stop. The cam H5 is preferably located at a
point on the valve stem 94 such that when the 2.5
the lower end of the reduced portion I02 and ex
tends therefrom to a point well above the over . lug H8 of the cam follower Hills in engagement
with the side edge of the slot 96, the valve will be
?ow level at which point it is in open communica
tion through laterally extending apertures I01 seated or in closed position. In this position, the
with chamber 5 to permit the escape of gases cam follower lug H8 overlies the slot 96 and ac
which may form in the valve chamber and oil cordingly is not in engagement with the cam face .30
lit so that the valve is free to seat and is aided
line. Bore Hit! is in open communication with
outlet port iild through a lamrally extending: pas: to seat properly by the spring iii.
Upon rotating the valve stem 9% in one direc
sageway lei-3. and extending vertically upward
from the outlet port i238 and to a point above the tion, the cam follower climbs the spiral com, com
constant liquid level is a. passageway Hi through pressing the spring iii and lifting the valve 95 ,
which gases forming in the valve chamber and away from its seat, thus opening the valve port
@533 to permit an increase of the quantity of liquid
oil line may also escape.
Preferably the lower end or reduced portion it? flowing through outlet nos, whereas rotation in
of the valve has a tapered face and is provided the opposite direction from closed position is pre~
with a. ‘ii-shaped opening lid in the side thereof vented by engagement of the lug l! 3 with the side
and in communication wlth‘bore Hit and also face 988 of slot 96. Preferably the vertical dispreferably converging upward from the bottom of
tance between the lowest point on the cam face
the valve to an apex adjacent the conical portion
59 thereof. Oil enters chamber 9% through pas
45 sageway 95 and when the valve is raised from its
seat, as shown in Fig. 8, the oil enters annular
chamber we. The oil then passes through the
V-shaped opening to the central bore I08 and
then into chamber 805 from which it passes to
50 the outlet E08 through passageway I09. It will
be seen that when the valve is raised from its
seat and more of the v-shaped opening, below the
apex, is in chamber 91, a larger quantity of oil will
lid to the highest is such that when the lug lid
rests on the highest point oi‘ the cam, the valve
is not in maximum open position, but is rather
be permitted to pass to the outlet i138. -
55
_
When the flame of an oil burner has been ex
tinguished or‘ the oil burner has been operating
with a low ?ame, and a high flame is instantly
desired, it is also necessary that a comparatively
large quantity of oil must be instantly delivered
to the burner. To this end I provide an outlet
valve structure, the valve 84 of which is slidably
disposed in its valve chamber so that it may be
slidably withdrawn to immediately open the valve
to maximum open position and also so that it can
65 be employed as a pump plunger, to pump oil to
the burner. To accomplish this I provide cam
means for vertically adjusting the valve 04 rela
tive to its seat, and in the present structure the
cam face is formed on the tubular-shaped top
70 edge 'of the valve chamber wall means, as at Ill.
On the valve stem ell and within‘chamber 5
is carried a cam follower Hi, the follower shown
being in the form of a tubular sleeve member hav
ing a central aperture for receiving the valve
75 stem 94. The follower ill includes a down
in a position to permit the largest quantity of oil
flow to the burner and the resultant highest ?ame
without danger of injury to the burner.‘ It will
be seen that the valve 94 by reason of the cam
adjustment, can not be set in maximum open po
sition, as is possible when a valve is threaded for
adjusting it, for if the valve is rotated beyond
the high point of the cam‘it will fall down to
closed position. However, it is desirable when the
burner ?ame has been extinguished or hasbeen
operating at low or pilot, ?ame to be able to ‘open
the valve to maximum open position, that is, to a
position such that oil will flow unobstructed by
the valve and be determined only by outlet port
capacity, until such time as regular uniform flow
through the oil line 3- is established. By reason
of the use of a cam adjusting means, the valve
94 may be lifted without necessity of rotation
and may be held away‘from its seat so that a
maximum ?ow of oil will pass to the burner. It
has also been found that gas bubbles form in the
control device passageways and'in the pipe 3'
leading to the burner when oil flow therethrough
ceases or when only a small quantity of oil is
flowing to the burner, and that these gas bubbles
interfere with the establishing of a uniform ?ow
of oil to the burner when an increase in ?ow is
desired.
In addition, when the outlet valve is _
closed so that oil ceases to flow through pipe 3‘
or when only a small quantity of oil is passing '
2,133,220
through pipe 8*, air collects therein between the
burner stand pipe and'the outlet port I08 with
the result that this air resists the passage of oil
through the line ii"L when it is desired to obtain a
high ?ame.
One of the advantages of the present valve out
let structure is that the valve 94 may be recip
rocated as a pump plunger in its housing and agi
tate the oil in the line to the burner to dispel
10 the gas bubbles formed therein and to aid the
oil in pushing the air in line 3'ii through to the
burner. The gas from the bubbles that ad
hered to the wall of the portion of pipe 3“ that
inclines downwardly from the burner will tend to
15 rise to the burner and escape therethrough and
will be aided in doing so by the increased volume
of oil ?ow through‘ pipe 3a when the valve 84 is
5
mum stop I24 after which it may be rotated, in
a clockwise directionas seen in Fig. 4. until it is
beyond the contact member I28 after which it
may be lowered and rotated until stopped by the
engagement of the lug “8 with the side wall of
slot”. The maximum stop member I25 is pro
vided with an upwardly extending?ange I29 hav
ing a horizontally disposed portion I30 extending
inwardly toward the valve stem 94 for engaging
the downwardly extending portion I21 01 the 10
handle I20.
A complete operation of the control device is as '
follows: Oil is fed to the control device by gravity
from the reservoir tank 2 and entering inlet port
II passes through the radially disposed passage- 15
ways 31 and then passes to the interior of the
strainer I3. The strained oil passes through pas
reciprocated, while the bubbles that adhered to , sageway I2 of the casing and into passageway 45
the wall of pipe iia adjacent the control device of the valve housing M and stands therein at the
20 and those bubbles that adhered to the walls of the level of the valve seat 41, when the valve 40 is inv 20
passageways of the control device casing, will closed position, by the force of gravity. Within
tend torisein passageways III and I08 and escape the chamber 5, a desired constant liquid level is
to the atmosphere above the level of the liquid in maintained by the valve 40 controlled by the ?oat
chamber 5.
l
60 which is pivotally connected to the valve and
25
The cover 6 is preferably‘formed with an up
operable in response to changes in liquid level to 25
wardly extending tubular portion I22 concentric
-with the valve stem 94 and through which the
‘valve stem extends and projects externally vof
the casing. A handle I20 is provided for manu
30 ally operating the ‘valve and may be ?xed to the
reciprocate the valve 40 and accordingly open and
close the same. When the valve raises to open
the valve port, the oil standing in chamber 45
nut I23 and between the nut I23 and the top of
the cover 6 is clamped a stop member I24 and a
second stop member I25, the stop members hav
ing aligned apertures for receiving the tubular
so that the level of the oil in chamber 5 rises
enters the chamberi 5 through the lateraly ex
tending communicating bores 48. When the level 80
upper end of the valve stem 94, such as by a nut" of the oil in chamber 5 rises to the predetermined
I2I, or in any other suitable manner. The up
substantially constant level, the ?oat 60 rises and
wardly extending tubular member I22 is exter
closes the inlet valve port. If for some reason
nally threaded for threaded engagement with a the ?oat 60 failed to close the inlet valve port
member I22. The handle I20 is formed with a
40 downwardly extending portion I21 for engaging
the stop members I 24 and I25. The stop mem
bers are preferably individual plate-like members
having upturned portions for engagement by the
downwardly extending handle portion I21.
45
The stop member I24, which may be termed the
minimum stop member, is positioned such that
when the handle portion I21 is in contact there
with the valve is opened su?iciently to permit a
. ouantity of oil to ?ow to the burner sufficient to
50 maintain a low ?ame or pilot light. “The stop
member I25. or maximum stop, is positioned such
that when the handle portion I 21 is in engage
ment therewith a desired maximum oil ?ow is
permitted to pass to the burner. It will be un
55 derstood that for different installations the de
sired positions of the stop members will vary so
that an installation workman will position the
stops in accordance vw'th the conditions of a par
ticular installation. If after the stops have been
60 properly positioned for a particular installation,
the user should relocate the maximum stop in an
e?ort to obtain a higher ?ame, it will be seen that
the highest ?ame he could obtain would be when
the stop I25 is positioned solthat the valve may
65 be rotated until the follower rests on the highest
pointlof the cam I I4 for beyond this. the cam i'ol
lower II8 would drop down to closed position.
The minimum stop I 24 is formed with an up
wardly extending ?ange portion I28 which‘ pref
70 erably extends to a point slightly above the lower
end of the handle portion I21. To move the valve
94 to closed position, which position is shown 'in
' Figs. 3, 4, 6 and 7, the valve is ?rst lifted until the
lower end of the handle portion I21 clears the un
75 wardly extending contact portion I28 of the mini
above the predetermined constant level, the oil
will over?ow into the second chamber 88 over the
dam 89.
. When oil.over?ows into chamber 88, the ?oat
,62 therein is caused to rise in the chamber and‘ 40
upon doing so vpivots the connecting lever 80
until it releases the toggle device including the
lever 64, the toggle device then acting down
, wardly under force of the spring 65 to close the
valve by the engagement of the lever 84 with the 45
top of the valve stem 40. When this occurs, the
remaining oil in'hchamber 5 external of chamber '
88. is fed to the burner until-exhausted after
which the burner ?ame becomes extinguished.
The user then knows that the safety valve actu 50
ating means has been tripped. By means of the
lever arm 85 the ?oat 62 can be reciprocated in
its chamber and by reason of its close ?t in the
‘chamber, the over?ow oil therein can be dis—
placed by the ?oat 82 and caused to ?ow back 55
into chamber 5. By means of the lever portion
15 extending externally of the casing, the toggle
device may be reset by lifting the handle 15 until
the lug 84 again seats on the supporting latch 83
of lever 80. When the end ‘I5. of lever 84 is 60
raised, the lug 84 engages an inclined edge of
the latch 82 and pivots lever 80 so that the latch
moves in a counter-clockwise direction, as seen
in Fig. 6, to permit the lug to be positioned on the
latch edge 83. It will also be seen that the toggle 65
device can be manually tripped by moving the
lever arm 85 downwardly until the latch 82 is
removed from beneath the lug 84. It will be un
derstood that the rate at which oil enters the in
let port depends upon the rate at which oil is 70
leaving the outlet port I08. When the handle I20
for manually operating the valve 94 is in the
position shown, the valve is closed and the lug
II8 of the cam follower H5 is in engagement
with the stop 98*. To open the valve port, the 75
6
valve 9‘ is ?rst lifted by means of the handle I29
until it clears the minimum stop E28 and the
uid level for actuating said valve to maintain a
predetermined substantially constant liquid lev
el, a second valve actuating means within said
valve 9‘ may then be rotated between the max
imum and minimum stops. ,It will be understood chamber including a lever normally disposed in
that this construction provides for a positive spaced relation above said valve stem and oper- 5
‘ able when the level of the liquid rises above said
shut-o? for the burner at the control device.
From the foregoing description, it will now be predetermined substantially constant level for
seen that 'I have provided a new and improved ‘engaging and moving the valveto closed position,
control device for controlling the ?ow of liquid. a second lever within said chamber having one
10
10 It will also be seen that I have provided a device 'end pivotally supported adjacent one end of said
of this character having a new and improved ar- '
rangement of the operating parts for increasing
emciency in operation of the device and that by
‘ reason of this new arrangement of the operating
15 parts they may be compactly incased in a com
chamber and having a catch normally support
ing said ?rst-named lever and operable for re
leasing said lever when the level of the liquid
rises above said predetermined constant level,
wall means within said chamber providing a sec 15
paratively small casing. In addition I have pro ' ond chamber within the ?rst and m communi
vided novel means for attaching and sealing a cation therewith, a second ?oat connected to the
removable strainer .in position in the device and other end of said second-named lever and oper
ed chamber for releasing
have also provided a novel outlet valve adjusting able in said secondmechanism the advantages of which have been said ?rst-named lev r,. end portions of adjacent no
ends of said levers extending externally of the
herein set forth.
casing
for latching or unlatching said levers. It is to be understood that the use of the word
4. In a. device of the character described, a
"float" throughout the speci?cation and claims
casing having a chamber for liquid and an inlet
is to be interpreted to include anybody, counter
port therefor, a valve for controlling said port ‘and gs
balanced or otherwise a?ected, for maintain
ing a predetermined substantially constant liquid having a stem portion extending therefrom,
level in the device, as well as ?oats of the type means operable in response to changes in liquid
having a speci?c gravity less than the speci?c level for actuating said valve to maintain a pre-‘
gravity of the liquid.
What I claim and desire to secure by Letters
determined substantially constant liquid level in
said
responsive
chamber,
to predetermined
a second valveincrease
actuating
of means
liquid
' Patent of the United States is:
1. In a device of the character described, a - level above said predetermined substantially con-l‘
casing having a chamber for liquid and a valve stant level, a lever operable by said second actu
porttherefor, a valve for controlling said port, ating means, said lever overlying said valve and
a ?oat operable in response to changes in liquid operable on said valve stem upon operation of es
said second actuating means thereby to move
level for actuating said valve to maintain a sub
stantially constant liquid level in the chamber,
toggle means normally arranged past center and
operable when released to move farther past cen
' ter to actuate said valve, and a second ?oat op
erable when the level of the liquid rises above‘
said vsubstantially constant level for releasing
said toggle means.
-
I
2. In a device of the character described, a
casing having a chamber for liquid and a valve
port therefor, a valve for controlling said port
and having a vertically extending stem portion, a
?oat operable in response to changes in the liquid
the valve to closed position, a pivot pin for said
lever, said lever having a recessed bearing face
running out to the edge of the lever for receiving
said pin, and resilient means for maintaining the 40 '
bearing face of said lever in engagement with
the pin whereby said lever is removable for access
to said valve.
.
,
5. In a device of the character described, a
casing having a chamber for liquid and having an
inlet thereto, a valve controlling said inlet,-means
cooperable with said valve to maintain the liquid
level in said chamber substantially constant, said
casing having a second chamber‘ communicating
above said constant level with said ?rst-named
chamber, ‘a ?oat member in said second-named
level for actuating said valve to maintain a sub
stantially constant liquid level in said chamber, a
second valve actuating means including a lever
member within said chamber and having one ' chamber, safety means cooperable with and for
moving said valve to closed position, said ?oat
end pivotally supported at one end of the. cham
her with the other end'extending toward the op
posite end of the chamber, said lever having a
tendency, to swing downwardly and engage said
valve stem to close the, valve port, a second lever
within said chamber for normally supporting
said ?rst-named lever in'spaced. relation above
‘ said valve. stem and having one end pivotally
supported at one end of the chamber and in the
opposite end from the pivot of said ?rst-named
lever, and a second ?oat disposed in the end of
the chamber adjacent the pivot point of the ?rst
named lever and connected to the free end of
the second-named lever, said second-named ?oat
being ‘operable upon an increase in liquid level
above said constant level torplvot said ‘second
a
member acting on said safety means upon over-
\4
-
?ow of liquid from said ?rst-named chamber into 55
said second-named chamber thereby to close'said '
valve, manually operable means extending ex
ternally of said casing for resetting said safety
means, and manually operable means extending
externally of said casing and operable to actuate
said safety means to close said valve.
6. In a device of the character described, a cas
ing having a chamber for liquid and an inlet port
therefor, a valve for controlling said inlet port,
a ?oat within said chamber operable in response
to changes in liquid level for actuating said valve
,to maintain a predetermined substantially con
stant liquid level, a second valve actuating means
within said chamber including a lever cooperable
named lever to release the ?rst-named lever.
3. In a device of the‘ character described, a . with said valve and operable when the level of 7°
casing having a chamber for liquid and an inlet the liquid rises above said predetermined sub- ,
port therefor, a valve for controlling said inlet stantially constant level for engaging and moving .
the valve to closed position, a second lever within
port and having a stem’portion extending verti
cally upward therefrom, a ?oat within said said chamber having a'catch normally supporting
chamber operable in response to changes in liq
said ?rst-named lever and operable for releasing 7‘
_ 2,188,228
7
said lever when the level of the liquid rises above
10. In a device of the character described, a
said predetermined constant level, a ?oat con
casing having a chamber for liquid and having
nected to said second-named lever and operable an inlet, a'valve controlling said inlet, a ?oat
upon increase of liquid level above said constant member in said chamber and operatively con
level for releasing said ?rst-named lever, end por
nected to said valve to maintain a substantially
tions of said levers extending externally of the constant
liquid level in said chamber, a safety '
casing for latching or unlatching said levers.
?oat in said chamber and operable to close said
7. In a device of the character described, a valve upon failure of said ?oat member to main
‘casing having a chamber for liquid and an-inlet '‘ tain
said constant level, a normally inactive lever
10 port therefor, a valve for controlling said inlet
in
said
chamber and engageable with said valve, 10
port, a ?oat within said chamber operable in re- '
a spring urging said lever into engagement with
sponse to changes in liquid level for actuating
said valve to close said inlet, an arm on said lever
said valve to maintain a predetermined substan
and positioned laterally of said spring and ex
tially constant liquid level, a second valve actu
tending
externally of said casing for manually
16 ating means within saidchamber including a
resetting said lever, a second lever operable by 1B
, lever cooperable with said valve and operable
said safety ?oat, cooperable latching means on
when the level of the liquid rises above said pre
said levers operable to hold said ?rst-named lever
determined substantially constant level for en
in inactive position‘ and operable by said safety /
gaging and moving the valve to closed position,
20 a second lever within said chamber having a catch ?oat to release said first-named lever, and an arm
on said second-named lever for manually releas
normallysupporting said ?rst-named lever and ing
said latching means.
operable for releasing said lever when the level
11. In a liquid level control device, a casing
of the liquid rises above said predetermined con
containing a chamber having‘ an inlet, a valve
stant level, wall means within said chamber pro-' , controlling said inlet, a ?oat responsive to liquid
viding a second chamber within the ?rst and in level in said chamber and operatively connected
communication therewith, a ?oat connected to to said valve to maintain a substantially constant
said second-named lever and operable in said sec
liquid level in said chamber, a safety ?oat in
ond-named chamber for releasing said first
said casing and operable upon predetermined in
named lever, end portions of said levers extend~ crease of liquid level above said constant level,
ing externally of the casing for latching or un
a lever in said casing engageable with said valve
latching said levers, the externally extending end to close said inlet,‘ said lever having an inactive
portion of said second-named lever comprising ‘position, a second ,lever cooperable with and
manual means for actuating said second-named operable to hold said ?rst-named lever in said
?oat whereby liquid may be returned from said
35 second-named chamber to said ?rst-named inactive position, said safety ?oat acting upon
. its operation by increased liquid level to move
‘chamber.
,
said ~second~named lever to release said ?rst
8. In a device of the, character described, a named lever, said levers being manually movable
casing having a chamber for liquid, an upward relative to each other-and mm‘ holding relation,
extending inlet member opening into said cham
and manually operable means projecting. ex
40 her and having a valve port, a valve member re
ternally of said casing for disengaging said
ciprocal in said inlet member and controlling levers whereby said ?rst-named lever will move
said port, a ?oat member in said chamber and said valve to close said inlet and for also position
operatively connected to said valve member to ing said levers in holding relation.
'
maintain a substantially constant liquid level‘
.12. In a liquid level control device,‘ a casing
45 in said chamber, safety means cooperable with
containing a chamber having an inlet, a valve
‘said valve member and operable to move said controlling said inlet, a ?oat responsive to‘ liquid
valve member to closed position upon failure of level in said chamber and operatively connected
said ?oat member to maintain said constant level, to said valve to maintain a substantially constant
said safety means comprising a lever in overlying liquid level in said chamber, a second chamber
50 relation to and engageable with said valve mem
in said casing, a wall in said casing determining
ber, said lever being readily removable for access the maximum liquid level therein and separating ,
to said valve member, and a coil spring arranged said chambers, a safety ?oat in said second cham~
with one end abutting the free end of said lever ber, a lever in said casing engageable with said
and holding said lever in engagement with its valve to close said inlet, said lever having an
55 fulcrum.
, '
inactive position, a second lever cooperable with
9. In a device of the character described, a cas
and operable to hold said ?rst-named lever in
ing having a chamber for liquid, an upward ex
said inactive position, said safety ?oat acting
tending inlet member opening into said cham
upon over?ow into said second-named cham
ber and having a valve port, a valve member re
ber to move said second-named lever to release
60
ciprocal in said inlet member and controlling said ?rst-named lever, said levers being manu
said port, a ?oat member in said chamber and ally movable relative to each other and into
operatively connected to said valve member to holding relation, and manually operable means
maintain a substantially constant liquid level in projecting externally of said casing for disen
said chamber, safety means cooperable with said
65 valve member and operable to move said valve gaging said levers whereby said ?rst-named lever
‘will move said valve to close said inlet and for
member to closed position upon failure of said also positioning said levers in holding relation.
?oat member to maintain said constantjlevel,
13. In a control device having a liquid level
said safety means comprising a lever in overlying responsive means for actuating a yalve to main
relation to and engageable with said valve mem
70 ber, said lever being readily removable for access tain a ‘substantially constant liquid level in a
reservoir, a safety device for moving said valve
to said valve member, releasable means holding ' to closed position upon failure of said responsive 70
said lever in engagement with its fulcrum, and means to maintain said constant level compris
cooperable means on said leverv and said casing ing a lever member movable into engagement
to maintain said lever in overlying relation to with said valve member, a spring ‘under stress
75 said valve member.
and exerting a force operable when released to 15
2,133,220
8
move said valve to closed position, said vspring
extending in the same general direction as said
lever and having one end in abutting engage
ment with the free end of said lever, the point
of engagement of said spring and said lever be
ing disposed pastcenter and being movable far
ther pastcent'er to move said lever to engage
and move said valve to closed position, means
holding said spring under stress with the point
oi engagement between the spring and said lever
in its ?rst-named pastcenter position, and a
liquid level responsive means operable upon a
predetermined liquid level rise above said sub
stantially constant level for actuating said hold
16 ing means to release the force exerted by said
spring.
14. In a control. device having a liquid level re
sponsive means for actuating a valve to maintain
a substantially constant liquid level in a reservoir,
a safety device for moving said valve to closed
response to liquid rising in said second-named
chamber for controlling movement of said sec
end-named valve actuating means to its active
position, and an arm member associated with
said ?oat and‘ having a portion extending exte
riorly of said casing for moving said second—
named float to displace and expel liquid from
said second-named chamber, said arm member
also having connection with said ?rst-named
arm member and operable to position said sec 10'
ond-named valve actuating means in its active
position.
15. In a liquid level control device, a casing
having a chamber for liquid and a valve port
therefor, a valve for controlling said port, means 15
responsive to changes in liquid level in said
chamber {or actuating asid valve to maintain a
substantially constant liquid level in said cham
ber, toggle means normally arranged past center
and operable when released to move further 20
position upon failure of said responsive means , past center to actuate said valve, means for hold
to maintain said constant level comprising a
lever member overlying said valve member and
movable to engage said valve member, spring
means under stress and exerting a force tending
and operable when released to pivot said lever
to move said valve member to closed position,
said lever member having a fulcrum support and
being readily removable from its fulcrum to
give access to said valve member, said lever
member being held by said spring means against
its fulcrum, and means operable in response to
a predetermined liquid level increase above said
constant level for releasing the force of said
spring.
.
15. In a liquid level control device, a casing
having a chamber for liquid. and a valve port
therefor. a valve for controlling said port, a
float operable in response to changes in liquid
level for actuating-said valve to maintain a sub“
stantially constant liquid level in said chamber,
a second valve actuating means and having an
active and an inactive position, said second valve
actuating means including an arm member hav
ing a portion extending exterlorly of said casing
for manually positioning said. second-named
valve ‘actuating means in its inactive position,
a second chamber in communication with said
?rst-named chamber and into which liquid ?ows
upon predetermined liquid level increase above
said substantially constant level, a ?oat dis
posed in said second-named chamber operable in
ing said toggle means in said ?rst-named past
center position, and means operable in response
to a predetermined increase in the liquid level
above said substantially constant level to actu
ate said holding means to release said toggle
means.
17. In a control device having a liquid level
responsive means for actuating a valve to main
tain a substantially constant liquid level in a
reservoir, a safety device "for moving said-valve
to closed position upon predetermined increase
in ill-quid level above said substantially constant
level comprising, a movable member having a
fulcrum, spring means having‘ a fulcrum and
held under stress between its iuicrum and said
movable member, said spring means being oper~
able on movement oi‘ said movable member in
one direction to move the valve to closed posi
tion, the point of engagement between said
spring means and said movable member being
disposed past center and being movable iur~
their past center on movement of said movable
member
said spring means, means to hold
said spring means under stress with the point
of engagement between said spring means and
said movable member in said ?rst-named past
center position, and means operable on said pre
determined increase in liquid level to actuate said
holding means to release said spring means.
50
ALBERT G. HAHN.
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