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"H, F, ALFERY
_
@$14,220
TEMPERATUR� CONTROL Aun SAFETY sHUToFF
Filed may 13. 1943
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2,414,220
H. F. ALFERY
TEMPERATURE CONTROL ANDYS繤ETY SHUTOFF
Filed )lay 13, 1943
3 Sheets-Sheet 2
Jan. 14, 1%'32 '
2,41432@
H. F. ALFz-:RY
TBHPER繲URE CONTROL AND' SAFETY SHUTOE?F
Filed iiay 13, 1943
5 Sheets-Skaai; 3
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2,414,220
' TEMPERATURE CONTROL AND SAFETY
SHUTOFF
'
Henry 1F. liliery, Milwaukee, Wls.','asslgnor to Mil
Wannee l玹ias Specialty Company, Milwaukee,
Wis., a orporationof Wisconsin
?
application May is, 1943, serial No; 486,844
i
reclaim.
il
This invention relates to control systems for
heating a body of :duid and maintaining it at a .
desired temperature, within predetermined lim
its, and has to do with such a system embodying
(Cl. 236-21)
.
.
'.
control means embodying my -invention applied
thereto;
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_
"
Figure 2_ is a. plan view of the control means
shown in Figure 1;
l
temperature control and safety shuto� means.
5
Figure 3 is a sectional view taken substan
My invention is directed to a system of the
tially on line 3_3 of Figure 2, certain parts be
character stated having 'a main burner and ther
ing shown in elevation and certain part-s being
~ mostatic vmeans for automatically controlling iiow
broken away;
of fuel to the burner in accordance with the tem
Figure 4 is a front view of the control means
perature of the iluid heated thereby, there also
of Figure 2;
.
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being means for materially reducing or complete
Figure 5 is a sectional view taken substantially
ly shutting off 韎ovv of fuel to the main burner.
on line 5--5 of Figure 2, certain parts being
in case the temperature of the fluid being heated
shown in elevation;
f
thereby exceeds a predetermined desiredl mari--4
Figure 6 is a fragmentary sectionaI view of
mum.
More specifically, I provide a conduit l5 the outlet chamber portion of the valve body, _
structure for supplying fuel to the main burner,
showing a modified form of my invention; and
Figure 7 is a diagrammatic view of the elec
outlet chamber, supply of fuel to the inlet cham
tromagnet and the armature for holding the
ber being controlled by conditions' at the main
main control valve in open position, this v韊vv
burner for shutting ou the supply oi fuel there 20 showing also-the manually operable switch means
to in the event of extinguishment of a pilot burn
for releasing the amature from the frame of the
electromagnet, and the associated circuits.
er associated'with the main burner, or of the
this structure having an inlet chamber and an
main burner, means also being provided for con- `
I have illustrated the control means of my in
vention as used in connection with a hot water
trolling supply of fuel from 'the inlet chamber
heater. by way of example. but it is to be under
to the Imain burner responsive to variations in
stood that the control means of my invention is
temperature of the fluid heated by the main
not limited to this particular use and may be
burner, there being means i?or resetting a valve
employed for all analogous purposes or for any
controlling supply of fuel to the inlet chamber,
other purpose to which it is suited.
and there also being means supplementary to the
.temperature responsive means lor disabling the 蛍 The control means of my invention comprises
a suitably formed valve housing or body i@ pro
recettinG means when the temperature ofthe
vided at its upper end with an exteriorly threaded
i'luid being heated exceeds a desired predeter
nipple li which, in the use of my invention illus
mined mammina, this latter means enabling the
tratecl, is threaded through a boss l2 of a hot
resetting means when the temperature of the
.駏id
to or below the desired maximum.
The ineens. controlling admission ot fuel to the
water tank it. Tank i3 is provided with an up
wardly domed bottom Wall ifi beneath and ad
jacent which is suitably mountedl a gas burner
ib of known type, disposed within a chamber
inlet chamber comprisesamain control valve
yieldingly urged in closing direction and, in the
defined by wall vI4 and the lower depending skirt
normal operation of the control means, held in 4o portion it of tank i3. The burner ttl is provided
open position by an electromagnet energized by
with a conduit l1 ilared at its lower end portion
an electric current generated by a tbermocouple
to provide a mixing chamber it, at the lower end
heated by a pilot burner associated with the
of which is mounted an adjustable disc it pro
main burner, or by the main burner itself, and
vided with openings, forregulating the amount
manually operable means is provided lor releas
>of air entering mixing chamber it, as is well
ing the main control valve from the electromag
known. Disc i9, and the bottom wall of cham
net and thus completely shutting ou" :low of fuel
ber l@ are provided with openings centrally there
to lthe main burner independently of the tem
of for reception of a tip 2t suitably mounted on
perature of the uuid heated by that burner, when
Athe upturned end cfa fuel supply pipe 2l passing
50 through a suitable opening in skirt portion it
Further objects and advantages of my inven
of tank I3. `
,
,
tion will appear from the detail description.
'l'he other end of pipe 2| is screwed into a pro
desired.
In the drawings:
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.
'
.
Figure l is a side view, of a hot water boiler
, jection 22 extending from one side of valve body
l0 at the upper portion thereof, which projection '
or tank, partly broken away and in section, with 55 is suitably bored and tapped for that purpose.
2,414,220
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3
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Projection 22 is provided with a passage 23 there
in opening into a cylindrical outlet chamber 24
closed at its outer end by a 馻nged screw cap
25 threaded into thickened portion or boss 26
of back wall 21 of body I0, with an intervening
gasket 28. The inner end wall of chamber 24 is
provided with a valve port 29 opening there
through into a neck 30 forming an integral in
' ward extension of chamber 24 and provided with
mation in which is secured one end portion of
a tube 41 in which is mounted, at said end, a
flanged plug 48. A rod 49 extends slidably
through plug 48 into the upper portion of inlet
chamber 32 of the valve housing I0, the outer
end portion of thisrod being screwed or other
wise suitably secured in a flanged closure plug
58 secured in the outer end of tube 41 in any
suitable mannerI to provide a 駏id-tight and
a circumferentially extending slot 3l opening 10 pressure-resistant closure therefor, conveniently
by a circumferential bead 5I pressed inwardly
into inlet chamber 32 of valve body I0. The
from tube 41 into a corresponding groove in plug
inner end wall of chamber 24 is provided with
ed. The tube 41 is formed of a suitable metal,
a raised outwardly extending rib 33 providing
and has a coefficient of expansion much greater
a seat for a suitably faced valve 34 controlling
than that of rod 49, the coefficient of expansion of
port 29. Valve 34 is attached to the inner or
which preferably is quite small. Tube 41 and rod
forward end of a valve stem 35 for outward move
49 together constitute a thermostat immersed in
ment therewith; by means of a U -shaped retainer
the water within tank I3 heated by burner I5,
36 -of known type engaging in a corresponding
circumferential groove in stem 35. The inner ' so that this thermostat issubjected to heat gen
end of stem 35 abuts a reduced screw studI 31 20 erated by the burner. As the temperature to
which the thermostat is subjected increases, tube
of. an inner valve stem 38, secured to valve 34
coaxially with "stem 35 by means of stud 31. The -
outer portion of valve stem 35 is slidable in a
hollow boss 38' integral with and projecting in
41 expands and moves rod 49 outward and, upon
a decrease in temperature, tube 41 contracts and
moves rod 49 inward of the valve housing ill.
ward from the inner- face of cap 25, this cap 25 The inner end of rod 49 is secured in a con
necting block 52 disposed 籦etween two arms, yone
being recessed from its inner face for reception
of which is shown at 53,?of the upper slotted por
of the outer end portion of a coil compression
tion of a valve operating lever 54 to which block
spring 40 seating therein and confined between
52 is loosely pivoted at .55. Lever 54 is pivoted,
cap 25 and� valve 34, this spring yieldingly urg
ing the valve toward 顃s'inner or closed posi ao intermediate its ends, at 56, on a mounting block
51 disposed between arms 53, this bloc'k 51 being
tion.
'
Valve stem 38 is slidable, at its inner end por
tion, through a disc 4I seating against a shoulder
threaded onto the inner end portion of an ad
>justing screw 58 rotatably mounted through a. ?
stufling box 59 of housing I0. Screw 58 is pro
in the rabbeted'inner end portion of neck 39,
this disc having an inwardly extending circum 35 vided, on its stem portion, with an enlargement
80 cooperating with the inner end of the stui?駈g '
ferential flange 42 on which seats the edge of a
box structure and with a follower 6I and a nut
spring steel snapidisc 43 of concavo convex cross
62 screwing into the outer end of the stuiling
section, of known type. A plunger 44 is slid�
ably mounted in the inner end of neck 30 and?is
provided, at its outer face, with an annularl pro
jectionor rib 45 of substantially V shape in cross
sectio-n, which contacts snap disc 43 a short dis
tance from the edge thereof. In _Figure 3 the
snap disc 43 is shown in its inwardly bulged
position, thus permitting closing of valve 34 by
compression spring 40, which serves to hold this
valve closed. Outward movement of plunger 44
exerts pressure upon snap disc 43 adjacent the
box, for confining screw 58 against endwise move
ment. At its outer end screw 58 is provided with
an enlarged head 84, preferably knurled, car
rying, at its inner end, and index member 65
provided with a point or index element mov
able over a suitably graduated scale 88 on theY
outer surface of valve housing I0. The lower
end portion of lever 54 is of increased thickness
and rounded as shown, at 85, and contacts the
inner face of rfollower 44 centrally thereof. In
"Figure 3 th'e lever 54 and associated parts are
circumference thereof, by means of element 45,
thus deforming disc 43 which, when deformed to 50' shown in the positions which they occupy when
outlet v?alve 34 has been closed responsive to
a certain extent, will snap to its other position
a desired maximum temperature to which the
so as to be bulged'outward, thedisc 43 in its
thermostat is subjected. After closing of valve
outward movement contacting the inner end of
34, the temperature of the thermostat decreases
valve stem 38 and forcing the same outward, thus
and rod 49 is forced inward of valve housing
opening valve 34 in oppositionto compression
i8, thus forcing the lower end >of lever 54 out
spring 4U and holding'the valve 34 in its open
ward, that is, toward outlet chamber 24, with
position. In that connection, it is to be noted
corresponding, outward movement of follower 44.
that the pressure contact of element 45 with the
When the temperature to which the thermostat
'snap disc 43, a short distance inward from the
edge of the latter, in conjunction with the edge 60 is subjected has decreased to the desired mini
mum, the outward movement of plunger 44 causes
of disc 43 seating on rim 42 of the disc 4I, sup
outward flexing of the snap disc 43, thus open
plements the snap action of disc 43 so as to as
-ingvalve 34 and maintaining it open until the
sure opening of valve 34y and maintaining of this .
desired maximum temperature has been again at
valve open by disc 43,- in the manner'stated.
tained, at whichl time lever 54 will have _been
Upon inward movement of follower 44 to about
returned to its position shown in Figure/3 and
its position shown in Figure 3?element 45 no
the valve 34 will be -closed by compression spring
longer exerts effective pressure contact upon disc
40, in the manner previously described. By
43, with the result that this disc may now be
means of the screw 58, the pivot 56 of lever 54
moved inwardly bythe pressure exerted by com
pression spring 48 until it snaps over center into 70 can be adjusted inward and outward, within lim
its, so that the thermoresponsive means for open
its full line position shown'in Figure 3, outlet
ing and closing the outlet valve 34 can be ad
valve 34 being then closed by compression spring
justed with facility for operation of this valve
at any desired predetermined minimum and max
Nipple Il is provided with a bore of step for 75 imum temperatures, within limits.
40 and held closed thereby until snap disc 43 is v
again snapped outward.
.
2,414,220
Valve housing lo is provided, at thelower end _d 13 is in its open position, as shown in Figure 3.
of inlet chamber 32 thereof. with a partition 1li
with an inlet valve port 1l extending there
through, the under face oi partition 10 being re-5
cessed'concentrically with port 1I to provide a
downwardhr extending valve seat element ?12
about port ll. An inlet valve 13 of suitable con?
In order to reset the valve 'It to open. position,
the reset stem 93 is moved inward of housing Ill
into contact with arm te o� angle lever 8d'. thus
swinging this lever, in the continued inward
movement of reset stem 93, in a oounterclock
wise direction, as viewed in Figure 3, and moving
struction controls port 1l, this valve being urged - valve l� into its open position and the. armature
in closing direction by a compression spring ?it
'it into its attracted position adjacent electro
disposed about valve stem 15 and con駈ed be
magnet le, the latter, if energized,.the=n serving
tween valve it and the upper or inner end of
to retain valve ?it in its reset or open position�
an electromagnet housing 16 secured to the lower
Arm t@ is disposed adjacent the lower enlarged
end of valve housing iii by a flanged nut l1, or'
portion to of lever bd, when valve 13 is in its
open position and lever 5d is in the position
in any other suitable manner. An armature 1o is
attached to the lower end of valve stem 'ib and, 15 which it occupies when the thermostat, compris
rin the open position of valve 13, is disposed in its
ing the tube 縧'i and rod do, has been heated to
attracted position in which it is held by an elec
the desired maximum temperature, or, more cor
tromagnet 'i9 within housing 16,' when the elec
rect-ely, the body of 駏id surrounding and in
tromagnet is energized. When valve 13 is in its
contact with the thermostat has been heated� to
closed position the armature 18 is in its released 20 the desired maximum temperature. That per- '
position spaced away from the electromagnet'w,
mits resetting of the inlet> valve 13 to its open
the latter being effective, when energized, for ~
position, in the manner above described. In the
holding the armature 1d in attracted position in
event the desired maximum temperature is ex
opposition to compression spring ?M but inei?i?ec
ceeded and the water or other huid is heated to
tive for moving the armature 'lo from its released 25 an objectionably high temperature, lever b4 is
position to its attracted position. Under nor
turned in countercloclrwise direction about its
mal operating conditions, the electromagnet ?lo is , pivot et, as viewed in Figure 3, into a position
energized and inlet valve 13 is held. by the elec
in which the lower enlarged portion t5 thereof
tromagnet in its open position. A gas supply
contacts arm ilo and swings lever te in clockwise
pipe et, provided with a shutoi� cock 8l of known 30 direction, thus forcing armature lo away from
type, leads from a suitable source of supply of
electromagnet le and releasing the valve i3,
gas, or other fuel oi suitable character, this pipe
which is then closed by spring 1d. So long as the
screwing at its upper end into a lateral projection
objectionably high or excessive temperature per
et extending from the opposite side of valve
sists, lever ed remains inposition obstructing in
housing lo from the projection 22, projection di
ward movement oi arni ed oi lever tu, thus dis
being disposed at the lower portion of valve hous
abling the resetting means and preventing re
ing it and opening into the latter below partition
opening oi the inlet valve i3. That guards
lo. 'Under normal conditions, the> gas cock- ul
against supply of iuel to the burner :ib in the
is open, and when valve lf3 is in its open position,
event outlet valve dil should remain open, due
gas flows into inlet chain-ber 32 from which it 40 to sticking or other causes, after the water or
may flow through pipe 2i to the main burner
other fluid has been heated to the desi-red max
it, under control ci the outletyalve tt.
.
imum temperature. in such event, the lever> 5d
inlet valve 'it is provided with a stem o5, co
would function to assure closing of valve 1t.
arial with and constituting in e馿ct a continua
whiley also preventing opening thereof until the
tion oi stem le, projecting therefrom upward
through the inlet opening li. The upper end
portion of stem iid is slotted at t6 for reception of
the end portion of lower arm dfi of an angle or
bell crank. lever titl pivoted at til in chamber 3i?.
4:5 water or other iiuid cools to or below the desiredY
maximum temperature.
When the control means oi my invention is ap
plied to a hot water boiler or analogous apparatus,
I preferably provide thermocouple means for en
The other arm il@ of lever t8 extends upward gena 56 ergizing the electromagnet ld, such means being
orally along.- the outer or front wall of housing
heated by a pilot burner associated with the main
it, and arm il is loosely pivoted at 9i to the valve
burnerA or, in certain cases, by the :main burner
stem tl�. The upper end portion of arm dil is
itself. A 駎ting ille is screwed into a boss lll�
disposed between the enlarged lower portion ed '
extending from one side of valve housing it, and
of lever dil and head @i at the inner end of a reset 55 opens into inlet chamber 32. A pilot burner till,
stem 9b slidable through a stuillng box ed of a
of suitable known type, is connected by a tube it@
flanged screw cap 95 threaded through thick
to 駎ting ltlli for supplying fuel to the pilot burner
ened portion or boss 9b of the front wall of hous
from a point between the inlet and outlet valves.>
ing it, with an intervening gasket 9i. The
So long as the inlet valve 'it remains in its open
stuffing bor: @il comprises a tubular extension ed 60 position, fuel will be supplied to the pilot burner
in which is slidably? mounted a .reset button @t
which, after ignition thereof, burns continuously
secured on the outer end of stem 93 and recessed
and serves to ignite the main burner, after ex
from itsinner end, as shown. A coil compres
tinguishrnent of the latter, when supply of' fuel
sion spring leo seats in the recessed vinner end' ' thereto is reestablished by openingof the outlet
portion of button et, between which and washer 65 valvetd. The electromagnet ?it and the means
ibi of the stumng box 9d spring itll� is confined.
for energizing it ?may be similar to the electro
The spring serves to urge stem 93 outward and
also to compress the packing of the stumng 4bon
to provide a duid-tight seal about the stern.
_magnet and the energizing 'thermocouple therefor
disclosed in my Patent No. 2,276,909. The ther
?mocouple has a hot junction l lil disposed in prox
' vWhen inlet valve 'le is released from electro 70 imity to the pilot burner i�'l so as to be heated
magnet le, it is moved upward by the compres
by 'the flame thereof. The internal element of
sion spring 'lo into its closed position, in which
the thermocoupie is suitably joined'to a lead con
position of this valve arm Sd of lever te is dis
ductor iii disposed within andninsulat頴d from a
posed adjacent head it ci resetstem 93, arm it@
metallic tube Si@ suitably joined to the: other or
being spaced away from head 92 when the valve 75 external element of the thermocouple and consti
l
acreage
tuting a second lead conductor. This thermo
in Figure 6 is similar'to that of Figure 3, except
that the valve body o'r?housing 1| 0 is provided with
couple may be similar to that disclosed in the pat- ~
ent to Oscar J. Leins, No. 2,126,56'1, or may be
of any other suitable type. Thel thermocouple
means is attached to the electromagnet housing
a duct or passage |34 opening from inlet cham
ber 32 into an offset |35 of outlet chamber 2d.
A regulating screw |36, having a, tapered inner
16'by connector means H5 effective for connect
end, is threaded through the wall of housing i0
ing lead ||| to one terminal of an energizing coil
with, in its innermost position shown in Figure
6, 籺he tapered inner end thereof extending into
IIS, disposed about one leg of frame ||1 ofthe
_ electromagnet 19, and for connecting the tubular`
the outer end of duct |34 and providing there
lead ||2 to the other terminal of coil- H6. The 10 with a restricted annular orifice through which
' connector means referred to may be similar to
gas or other fuel may 'iiow from inlet chamber
SZ into outlet chamber 263, so long as the inlet
that disclosed in my Patent No. 2,276,909, men
` tioned above, and need not be illustrated nor de
valve 13 is open, providing means for supplying
scribed here in greater detail. Suiiice it to state
`that the electromagnet 19 is provided with a coil
energized from a suitable source of electric cur
rent, preferably by means of a thermocouple
to the burner i5 a restricted amount of fuel for
dim or low'operation thereo遱umcient to main
tain the water within boiler i3 at approximately
the desired-"maximum temperature during pe~
heated by a pilot burner associated with the main
riods when water is not being withdrawn from
burner, or, in certain cases, by the main burner. ' the boiler >or tank i3 in considerable amount.
I also provide means whereby the inlet valve 13 20 'With the arrangement of Figure 6, for low or
may be released from the electromagnet 19 so as
dim operation of the burner i5, gas will be_- sup
to be moved _into closed position, independently
plied to this burner so long'as the valve 13 is
of the automatic control means above described.
in vopen position and independently of the clos
This latter means is similar to the manual re
ing of the outlet valve 34. Accordingly, if desired,
lease of my Patent No. 2,276,909, and a brief de 25 the pilot burner |01 may be omitted, the thermo
scription thereof will suffice. The terminal of
couple being so disposed that the hot juncture
coil IIB, which is connected to lead |||, is also
thereof is heated by a .iet or flame of the main
connected, by a lead |20, shown in Figure 7, to a
burner which, if desired, may be provided with
bracket 12| >carrying a contact member |22 and
`a suitably directed jet opening or ori馽e for >that
secured to but insulated from a bracket |23 suit 30 purpose. It will also be understood that any
l � ably mounted on the lower end wall of electro
other -suitable known type of burner maybe used magnet housing 16.
Contact member |22 coop
in place of the burner I5 shown�. It is also de
sirable that the 駉w of gas to the pilot burner, ,
erates with a contact point |24, carried by a. re--
silient metal strip or contact spring\ | 25 secured
when used, be regulated, for which purpose 駎
to the lower end wall of housing 16 in electrical 35 ting |05 is provided with'a tapered plug valve
conducting relation thereto. A tubular fitting
|38 of known type held seated by a compression
' |26 is suitably secured at its upper end to housing
spring |39, in a known manner, this valve hav
._ : 16, withinl an opening through the lower end wall
ing a slotted stem extending above 駎ting |05
thereof, and slidably receives a plunger |21 nor
for reception ofi the blade of a screw driver, or
mally held outward-by a coil compression spring 40 other suitable instrument, whereby the valve may
|28 seating at its outer or lower end in the re
be turned to regulate the amount of gas flowing
cessed inner end portion of a button� |29 secured
on the outer end of plunger |21. Spring |28 is .
to顃he pilot burner |01.
I confined between button |29 and a washer |30
seating on packing material |3| compressed about _
plunger |21 to provide a fluid tight ?closure there
about. Outward movement of plunger |21 is lim
-
.
It will be seen that under normal operating
conditions, the control~means of Figures 1 to 5,
inclusive, and Figure 7, is automatically operative
for supplying fuel to the main burner responsive
to a desired -minimum temperature and fcr cut
ting oi� the supply of fuel to the burner respon-.
'ited by a?iiange. |32 thereon, adjacent the inner
end thereof, and the inner end of this plunger is
sive to a desired maximum temperature, so long _
disposed in alignment with the free end portion
of the contact spring |25. It will be seen that
as the inlet valve 13 remains in its open posi
tion, the latter valve being automatically released
by pushing the button |23 inward or> upward,
spring |25 is deformed and contact point |24 may
be moved into contact `with contact member |22.
from the electromagnet and closed responsive to
objectionably high temperature in excess of the
desired maximum and being maintained in closed
. Since lead conductor ||l is connected to housing
position so long as such excess temperature per
-16 and the contact spring |25 is also connected
sists, by disablement >of the resetting means.
lto housing 16, when the contactpoint |24 is
Further, in the event of extinguishment of the
moved into contact with the contact member |22,
-pilot light, the electromagnet is deenergized,
the current generated by the thermo-couple is
thereby causing ~closing of the inlet valve, which
shunted around the coil ||6. thus deenergizing 00 prevents iiow of fuel to either the -main burner
the electromagnet and releasing the amature 18
or the pilot burner until the latter burner has
therefrom, permitting closing of valve 13. The
been relighted. In Vthe resetting operation, the
button |23 . and associated parts thus provide
reset button is pushed in so as to open the inlet
manual release'means whereby the valve 13 may '
valve 13 andmove the armature 18 to its re
be closed at the will of the operator, independ
ently of -the temperature of the water or- other
fluid being `heated by the main burner. It is to
be understood that, within the broader aspects -
of my invention, Aany other suitable means may
be provided for energizing the electromagnet,
and any other suitable means may be provided
for releasing the inlet valve from the electro
magnet or, if desired, such release means may
be omitted, though it is preferred.
The modified form of my invention illustrated
'NI
tracted position, after which the pilot burner
|01 is ignited and the hot juncture ||0 of the
thermocouple is heated thereby, the reset button
33 being held in its inner position for a short
time, until the coil of the electromagnet has been
>properly energized, after which button 99 may be
released and returned to its normal outer posi
tion, the inlet valve 13 being then held in its
open position by the electromagnet. The opera
tion of the-modi馿d form shown in Figure 6 is
.the same as that above described, except that the
i.
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aci-1,220
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"d
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outlet'valve 36, when closed, does not 4coimiletely
. gized by said thermoelectrlc generator effective
cut .ofithe supply of fuel to the main burner,
which then burns dim or low, dueto the re
stricted supply of fuel thereto through the ori
lice controlled by screw i3d, it also being noted
that in this modiiledform the pilot burner may
valve' in open position, said inlet' valve having a
stem extending through said inlet port, an angle
lever pivoted in said inlet chamber with one arm
when energized for normally holding said inlet
pivoted to said stem for moving said inlet valve
into open position and in closing direction, a re
set stem for moving said lever in valve opening
direction, and thermoresponsive means for open
ing and closing said outlet valve responsive `to
be omitted, the thermocouple being so disposed
that the hot juncture thereof is heated by a jet
or 馻me from the main burner.
As above indicated,'and as will be understood
by those skilled in the art, changes in construc
a desired minimum temperature and a desired
- tion and arrangement of parts of my invention
may be resorted to without `departing from the ?
maximum temperature, said thermoresponsive
馿ld and scope thereof, and' I intend to include
all such variations, as fall within the scope of
means comprising a -second lever having a part
normally disengaged from the other arm of said
iirst lever for movement of the latter into inlet
the appended claims, in this application, in which
the preferred forms only of my invention have
valve opening position but engageable with said
been discl髎ed.
~
,
other arm for moving said first lever in inlet
valve closing direction and thereafter restrain- .
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,
,
ing it against movement in inlet valve opening
1.l In control means of the character described, 20 direction, responsive to temperature in excess of
a main burner, a fuel supply conduit therefor,
the desired maximum and so long as such excess
I claim:
means comprising an inlet valve and an outlet l
temperature persists.
I
v
?
valve for .controlling dow of fuel through said
, 4. In control means of the character described,
conduit, meansyieldingly urging said inlet valve
a valve body having an inlet chamber and an
in closing direction, a thermoelectric generator, 25 outlet chamber with` an outlet valve port there
electromagnetic means energized by said thermo
between, said inlet chamber having an inlet valve
electric >generator effective when energized for a port, an inlet valve controlling said inlet port
normally holding said inlet valve in open posi
yieldingly urged in _closing direction, :a thermo
tion, reset means for Imoving said inlet valve
electric generator, electromagnetic means ener
from closed to open position, thermoresponsive 30 gized by said thermoelectric generator effective
means subject to heat generated by said main
when energized `for normally holding said inlet
burner effective for opening and 'closing said out
valve in open position, said inlet valve having a
stem extending through said inlet port, an angle
let valve responsive to a desired minimum tem
perature _and 'a desired maximum temperature,
.and means responsive to said thermoresponsive
lever pivoted in said `inlet chamber with> one
35
arm pivoted to said st'emvfor moving said inlet
valve into open position and?in closing' direction,
,means and operable at a temperature in excess
or? said desired maximum temperature to releasev
a reset stem slldable through said valve body
said inlet valve from said electromagnetic means
_into contact with?the other -arm o1? said leverv
for movement to closed position and to prevent
for moving the latter into valve opening posi
resetting said inlet valve to open position by said 40 tion, a second lever in said inlet chamber, a
reset means until. the temperature to which said
thermostat connected to said second lever for
thermoresponsive?means is responsive drops be- _ moving it in one direction responsive to a de
low said excessive temperature'.
sired minimum temperature and in the opposite,
2. 'in control means o_� the character described,
direction responsive to a desired maximum tem
a valve body having an inlet chamber and an 45 perature, and means actuated by said second lever
_outlet chamber with an outlet valve port there
for opening `and closing said outlet valve respon
between, said inlet chamber having an inlet valve
sive to movement of said second lever in said
port, an inlet valve controlling said inlet port i
one direction and in said opposite direction, said
yieidingly urged in closing direction, a thermo
second lever being disposed'to contact said other
electric generator, electromagnetic means ener
50 arm of said first lever and thereby move the
gized by said thermoelectric generator eiiective
when energized for normally holding said inlet
latter in its other direction to releasel said in
let valve from said reset means, when the tem
valve in open position, a reset lever connected
perature to which said thermostat is subjected
to said inlet valve for moving the latter into open
exceeds the desired maximum, and to thereafter
position and in closingr direction, a reset stem 55 obstruct movement of said other arm of said
slldable through said valve body for movingr said
first lever and thereby restrain the latter against
movement into valve opening position so longy
lever in valve opening direction, and thermo
-responsive means for opening and closing said
as such excess temperature persists.
outlet valve responsive to a desired minimum _
5. In control means of the character described,
temperature and a desired maximum tempera 60 a valve body having an inlet chamber` and an
ture, said thermoresponsive meansl comprising
outlet chamber with an outlet valve port there
means for moving said lever in valve closing dl
between, said inlet chamber having an inlet valve
rection effective for releasing said inlet valve
port, an inlet valve controlling said inlet port
lfrom said electromagnetic means responsive to
yieldingly urged in closing direction, electromag
temperature in excess of said desired maximum ?
netic means effective when energized for nor
and for ,thereafter restraining said levern against
mally holding said inlet valve in open position,
means for energizing said electromagnetic means,
an outlet valve controlling said outlet port, means
comprising a snap disc for opening said outlet
valve by movement of� said disc in one direction
and closing it responsive to movement of said disc
in the opposite direction, reset means for mov
ing said inlet valve from closed to open position,
thermoresponsive means,.mechanical means ac
tuated by said thermoresponsive means effective
movement in valve opening direction so long as
such excess temperature persists.
3. In control'means of the character described,
a valve body having an inlet chamber and an out
lety chamber _with an outlet valve port therebe
tween, said inlet chamber having an inlet valve
port, an inlet valve controlling said inlet port
yleldingly urged in closing direction, a thermo
electric generator, electromagnetic means ener
aeiaeao
Ai2
'.
said thermostat is subject drops below said pre.
for causing movement of said disc in said vone
direction and in said other direction responsive
.V determined temperature.V
8. In'a'device of the class described, in com
to a desired minimum temperature and to' a de
sired maximum temperature. and means respon- -
bination, an electromagnet, an armature for said '
sive to said thermoresponsive means and oper
able at a temperature in' excess of said desired
maximum temperature to release said inlet valve
electromagnet, a controlling member connected
to said armature, a thermocouple subject to the
heat of a iiame and connected in 'circuit with
said electromagnet whereby normally said arma
from said ?electromagnetic means for movement
to closed position and to prevent resetting said
ture is held in attracted-position and said con
inlet valve to open position bv said reset-means 10 trolling member in a iirst position by the thermo
electric current 駉wing through said electromag- '
until the temperature to which said thermo
net when said thermocouple 'is heated by said
馻me but on extinguishment of said 馻me said
controlling member is moved to a second' posi
6. In control means of the character described,
a valve body having an inlet chamber and an out 15 tion bythe release of said armature'by said elec
tromagnet, reset means for resetting said arma.
let chamber with an outlet valve port therebe
ture to attracted position an'd said controlling
tween and a slotted neck extending from said
@member Ito said first position, and ?thermostat
`outlet chamber into said, inlet chamber, said in
controlled means operable at apr'edetermined
let chamber. havingr an inlet valve port, a -snapy
responsive means is responsive drops below said
excessive temperature.
.
-
disc mounted at its edge in said neck, an out
20 temperature to release said armature from said
electromagnet for movement of said controlling
wardly opening and inwardly closing?valve con
trolling said outlet port yieldinglv urged inward
member to said second position and to prevent re
and having an inwardly extending stem disposed y >
setting said armature to attracted position and
said controlling member to said 駌st position by
with its inner end adiacent said disc to be con
tacted thereby for opening said valve when said 25 said reset means until the temperature to which
said thermostat is subject drops Abelow said pre
disc is iiexed outward. a disc follower slidable in
determined temperature.
the inner end of said neck having on its outer
9. In a device of the class described, in com
face an annular Aelement contacting said disc ad
bination, 'an electromagnet, an armature for said ?
jacent'the edge thereof. a valve operating lever
pivoted intermediate its ends in said inlet cham 30 electromagnet, a first valve member connected
to said armature, a thermocouple subject to the
ber with one arm contacting the inner face of
heat of a flame and connected in circuit with
said follower. a thermostat connected to the other
said electromagnet whereby normally'said arma
armof said lever ei頴ctive for moving said one
ture is held in'attracted position and said iirst
arm thereof outward and inward for opening and
closingA said outlet valve> responsive to a desired 35 valve member is held in open position by the.
minimum temperature and a desired maximum A
thermoelectric current flowing through said elec
temperature. an inlet valve controlling said in
tromagnet when said ther?mccouple is heated by
said flameA but on extinguishment of said llame
let port yieldingly urged in closing direction. a
said first valve member is moved to closed posi
thermoeiectric generator, electromagnetic means
energized by said therm骵lectric generator ei飁c 40 tion by the release of said armature by said elec
tromagnet, reset means for resetting said arma
tive for normally-holding said inlet valve in
ture to attracted position and said iirst valve
open position. reset means for moving said inlet
member to open position, thermostat controlled
.valve from closed to open position, and means
means operable at a predetermined tempera
responsive to said thermoresponsive means and
operable at a temperature in excess oi said de 45 ture to release said armature from said electro
magnet for movement of said 駌st valve member
sired maximum temperature to release said inlet
to closed position and to 'prevent resetting said
valve from said electromagnetic means for move
armature to attracted position and said. ilrst
ment to closed position and to prevent resetting
valve member to open position by said reset means
said inlet valve to open positionby _said reset
lmeans until the temperature to which said ther
moresponsive means is ?responsive drops below
said excessive temperature.
`
7. In a device of the class described, in combi
` nation, an electromagnet, an armature' for said
electromagnet. a valve member connected to said
armature, a thermocouple subject ?to the heat
` of a yflame and connected in circuit with s'a'd elec- .
y tromagnet whereby normally said armature is
held in attracted position and said valve mem
ber in open position by the thermoelectric cur
rent flowing through said electromagnet when
said _thermocouple is heated by said flame but
on extinguishment of said flame said valve mem
ber is moved to closed position by the release
of said armature by said -electromagnet. reset
means for resetting said armature to attracted
position and said valve\member to open position,
and thermostat controlled means operable at aA
until the temperature to which said thermostat
is subject drops below. said predetermined tem
perature, and a second valve member in series
with said first valve member and actuated be- _
tween closed and open positions by said thermo
stat controlled means at temperatures below said
' predetermined temperature.
10. In a device of the class described, in com
bination, an electromagnet, an armature for said
electromagnet, a >iirst� controlling member con
nected'to said armature, a thermocouple sub
ject to the heat of?a flame and connected in cir--
cuit with said electromagnet whereby normally
said armature is h_eld in attracted position and
said iirst controlling member in a iirst position
by the thermoelectric current 駉wing through
said electromagnet when said thermocouple is
Aheated by said flame but on extinguishment of
said flame said 駌st controlling member is moved
to a second position by the releasefof said arma
predetermined temperature to release said arma 70 ture by said electromagnet, reset means for re
ture from saidl electromagnet for movement of
setting` said armature to attracted position and
said first controlling member to said 駌st posi
tion. thermostat controlled means operable a't a
predetermined temperature to release said arma
said reset means until the temperature to which 75 ture from said electromagnet for movement of
said valve member to closed position and to pre
vent resetting said armature to attracted posi
tion and said valve member to open position by
2,414,220
13
said iirst controlling member to said second posi
tion and to prevent resetting said armature to
attracted- position and said controlling member
to said ilrst position by said reset means until the
temperature to which said thermostat is subject
drops below said predetermined temperature, and
a second controlling member actuated between
operating and shutoff positions by said thermo
14
,
tracted position and said controlling member to
said first position, a thermostat, an arm con
trolled by said thermostat, and a pivoted bell ` _
crank lever having one arm connected to said
controlling member and another arm positioned
between and cooperable with `said thermostat
controlled arm and said reset stem, said thermo
stat controlled arm and said bell crank lever be
predetermined temperature.
ing operable at a predetermined temperature
sensed by the thermostat to release said armature
` 11. In a device of the class described, in?com- f
from said electromagnet for movement of said
bination, an electromagnet, an armature for said
electromagnet, a valve member connected to said
amature, a thermocouple subject to the heat of a
flame and connected in circuit with said electro 15
controlling member to said second position and to
prevent resetting said armature to attracted posi
tion and said controlling member to sa韉'駌stl
position by said reset stem until the temperatllnfe'A '?
to which said thermostat is subject drops bel'o
stat controlled means at temperatures below said ,
magnet whereby normally said armature is held
in attracted position and said valve in open posi
tion by the thermoelectric current flowing
through said electromagnet when said thermo
said predetermined temperature.
-
13. ?In a device of the class described, in corn;
bination, an electromagnet, an armature for said
couple is heated by said lflame, but on extinguish- , 20 electromagnehsa first valve member connected -
ment of said flame said valve member is- moved
to closed position by the release of said armature
by said electromagnet, a reset stem for Vresetting
' . said armature to attracted position and said valve
member to open position, a thermostat, an arm
' controlled by said thermostat. and a pivoted bell
crank lever having one arm connected to said
to said armature, a thermocouple subject to the
v heat of a 馻me and conne'cted in circuit with said
electromagnet whereby normally said armature is
held in attracted position and said valve memberl
is held in open position by the thermoelectric cur- `
rent flowing through said electromagnet-when
said thermocouple is heated by said iiame but on
extinguishment of said?flame said 駌st valve
valve member and another arm positioned be
member is moved to closed position by the release 1
tween and cooperable with said thermostat _con-r
trolled arm and said reset stem, said'thermostat 30 of said armature by said electromagnet, a reset
stem for resetting said armature to attracted po
controlled arm and said bell crank lever being op
sition and said first valve member to operiv posi
erable at a predetermined temperature sensed by
tion, a thermostat, an arm controlled by said
the thermostat to release .said armature from said
thermostat, a pivoted bell crank lever having one
electromagnet for movement of said valve mem
ber to closed position and to prevent resetting�
arm connected to said 駌st valve member and an
said armature to attracted position and said valve
member to open position lby said reset stem until
the temperature to which said thermostat is sub
other arm ? positioned between and cooperable
ject drops below said predetermined temperature.
12. In a device of the class- described, in com
bination, an electromagnet, an armature for said
electromagnet, a controlling member connected�
to said armature, a thermocouple subject to the
heat of a iiame and connected in circuit with said
electromagnet whereby normally said armature
with� said thermostat Acontrolled arm and said
reset stem, said thermostat controlled arm and
said bell crank lever being operable at a` prede
termined temperature sensed by the thermostat
to release said amature from said electromag
net for movement of said iirst valve member to
closed position and to prevent resetting said ar
mature to attracted position and said 駌st valve
member to open position by said reset stem until
the temperature to which said thermostat is sub
is held in attracted position and said controlling
ject drops below said predetermined temperature,
member in first position by the thermoelectric
and a second valve member in series with said
current flowing through said electromagnet when
駌st valve member and actuated between closed
said thermocouple is heated by said flame but on
extinguishment of said flame said controlling 50 and open positions by said thermostat controlled
arm at temperatures below said predetermined
member is moved to a second position by the re
. temperature.
lease of said armature by said electromagnet, a
reset stem for resetting said armature to at
HENRY F. ALFERY.
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