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Патент USA US2403611

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July 9, 1946.
w_ A, RAY
2,403,61 1
RESET VALVE. AND CONTROL THEREFOR
Filed Feb. 4, 1941
4 Sheets-Sheet l
6
July 9, 1946-
w. A. RAY
2,403,611
RESET VALVE AND CONTROL THEREFOR
Filed Feb. 4, 1941
4 sheets-sheet 2
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lJuly 9, 1946.
w. A. RAY
2,403,611
RESET VALVE AND CONTROL THEREFOR
Filed Feb. 4, 1941
4 sheets-sheet s
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ATTORNEY
July 9, 1946.
2,403,611
w. A. .RAY
RESET VALVE AND CONTROL THEREFOR
Filed Feb. 4,‘ 1941
4 sheets-sheet 4
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BY
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ATTORNEY
>2,403,611
Patented July 9, 1946
UNITED STATES PATENT OFFICE
2,403,611
RESET VALVE AND coN'rnoL 'rHER'EFoR
William A. Ray, Glendale, Calif., assignor to
General Controls Co., a. corporation
Application February 4, 1941, Serìial No. 377,274
12 claims.
(Cl. 137-144)
l
This invention relates to a fuel burner system,
and particularly to a safety valve control, incor
porating a thermocouple and a reset mechanism,
for use in controlling the flow of fuel to the sys
tem.
Such systems usually include an automatic cut
oif valve to ensure against flow of fuel to the
burner while the burner is unlighted. A valve
of this character may be arranged to be main
tained open for example by an electro-magnet
energized by a thermocouple in the pilot ñame,
and hence being open only so long as the pilot
burner remains lighted. Thereafter, the main
cock may be turned on and 01T as desired, the
pilot flame serving to ignite the fuel passing
through the main burner whenever the cock is
opened.
.
_
2
-
power o1’ very low value, such as one or two milli
watts.
-
‘
It is still another object of this invention to
ensure that the closing of the safety valve occurs
without material delay after the pilot flame fails.
This is accomplished by using as little mass as
io
practicable in the thermocouple conductors, s0
that the cooling of the thermocouple occurs
promptly upon pilot flame extinguishment.
This invention possesses many other' advan
tages, and has other objects which may be made
more easily apparent froma consideration of sev- _
eral embodiments of the invention. For this pur
pose there are shown a few forms in the draw
ings accompanying and forming part of the pres
. ent speciñcation.
'I'hese forms will now be de
scribed in detail, illustrating the general principles
of the invention; butit is to be understood that
Valves of this general character are described
this detailed description is not to be taken in a
in applications filed in the name of William A.
Ray, on February 19, 1940, Serial No. 3119.735, en 20 limiting sense, since the scope of the invention
is best defined by the appended claims.
titled "Fluid control valve,” and on March 20, 1930,
' In the drawings:
Serial No. 324,987, entitled “Valve reset mecha
Figure 1 is a view, mainly in section, of th'e reset
nism.”
valve, including an improved thermocouple for
It is an object of this invention to provide a
.
valve of this type of compact and simplified con 25 controlling the valve;
Fig. 2 is a similar view of a fragment of Fig; 1
struction.
showing another position of the valve;
.
It is another object of this invention to provide
Fig, 3 is a top plan view of the valve, partly in
a reset valve arranged for use in connection with
controlling the individual burner units of a mul 30 section, as indicated by the arrows 3-3 in Fig.~1;
Fig. 4 is a section as seen on plane 4--4 _of
tiple unit furnace.
Fig.
l;
In providing a safety shut off valve, considera
Fig. 5 is a section as seen on plane 5_5 of
tion must be given to the electric power that is
'Fig 4:
required to hold the valve in open position. This
Fig. 6 is a section as seen on plane 6-6 of
power is generated thermoelectrically by the aidFig. 1;
of a pilot flame. For the function of igniting the 35 Figs. ’l and 8 are detail sections as seen on cor
main burner,- the flame can be quite small, and it
respondingly numbered planes of Fig. 1;
’
is advantageous to be able to generate the req
Figs. 9 and 10 -are diagrams illustrating the
uisite electric power without the necessity of
operation of the valve;
any substantial increase in the size of the pilot 40 Fig. 11 is a section similar to Fig. 4, but showv`s
burner flame. By the aid of the present inven
ing a modif-led form of- valve;
tion, this advantage is readily obtained; and par
Fig. l2 is a fragmentary section as seen on plane
ticularly by the particular structure of the ther
|2-l2 of Fig. 11; and
`
moelectric generator. This'generator is simple in
y Fig. 13 is a showing in diagrammatic form of a
structure, utilizing but a single thermocouple. By 45 system including a multiple unit furnace co trolled by reset valves._
f '
couple as taught herein, it is possible to generate
The valve _I is shown as coupled to a conduit 2
a relatively high electromotive force, making it
larranged to supply. gaseous or liquid fuel to a
possible to utilize a higher resistance for the coil
burner (not shown). The valve structure I is a
of the electromagnet for holding the safety valve 50 dual valve, including the main gas cock 3 arranged
open, and yet obtain the maximum power from
formanual contro1 and the automatic shut-oil,
the thermoelectric generator.
v
valve k4. Fuel under pressure is admitted to the
It is another object of this invention therefore,
‘valve structure I by conduit 5.
to make it possible to maintain the safety valve
It is apparent that when the automatic shut
the arrangement and structure of the thermo
open by the aid of thermally generated electric 55 oil' valve 4 is closed, as in Fig. 1, no fuel can be
2,403,8 1 1
delivered through the main' cock 3. The valve 4,
however, is so arranged that it may be held in its
open position, placing the control of the ñow of
fuel entirely in the main cock 3.
The valve structure I includes a body I0 for
accommodating the main cock 3, and the auto
is guided axially with respect to seat 35 by stem
33 and may be moved toward or away from seat
33 by lever 42.
Body I0 is divided into an inlet chamber 55
and an outlet chamber 53 by that portion 51 of
the body carrying valve seats I2 and 33. This
portion 51 as shown most clearly in Fig. 3, is of
general cylindrical structure. Fuel is admitted to
matic valve 4, together with the means for open
ing the latter. thus providing a simple and com
pact structure with no exposed moving parts.
inlet chamber 55 by conduit 5 which is secured .
The main cock 3 comprises a rotatable hollow 10 in body i0 by conventional pipe threads. Fuel is
tapered plug II, seated in a cooperating conical
conducted from outlet chamber 53 by means of
seat I2 formed in body I0. In the position of
conduit 2. As shown, body I0 is provided with
Fig. 1, the plug Il is in closed position, the dis
an exteriorly threaded extension 53, to which
charge opening I3 of the plug being out of aline
conduit 2 is secured by a pipe coupling 53. Ob-_
ment with the outlet port I4 in body I3. The 15 viously, if valve closure 3l is seated communica
tion between chambers 55 and 53 is stopped. If
inlet to the plug is formed by the axial bore I5,
which is open at the bottom of the plug.
closure v3| is unseated, communication between
The plug II is urged to its seat I2 for substan
these chambers may be controlled by rotating
tially fluid tight operation. as by the aid of a ~
plug I I from the position shown to that in which v
compression spring I3. This springLis disposed 20 ports I3 and I4 are in communication, or vice
around a post I 1 connected to and projecting up
versa.
’
wardly from the upper end of plug II, the lower
The mechanism for unseating closure 3l will
now be described. Slidably supported in‘body
end of the spring seating on the bottom I3 of a
portion 51 for movement parallel with the axis
counterbore I3 formed in the cylindrical boss 3
of body III. The upper end of spring I3 àbuts 25 of plug Il is a push rod 32, the lower portion oi.’
a stop plate 20, firmly secured to post I1. Thus,
which extends through an opening 33 in lever 42
post I1 has its upper end portion 2| of reduced
(Figs. 1 and 8). The lower end of rod 32 is pro
diameter with a square base portion 3 forming a
vided with a thin nut or other means forming a
shoulder 34 thereon, a compression spring 35 be
shoulder 22 for the accommodation of plate 23
and threaded for the reception oi' a nut 23. Nut 30 ing confined betweenthis shoulder and the under
23 serves to clamp stop plate 23 against the shoul
side of lever 42. A circular depression 33 is
der 22. The force exerted by spring I3 against
formed in the lever to accommodate and guide
stop plate 23 is such as to urge plug II firmly to
spring 35. This depression 63 is formed by press
ing the material of lever 42 upwardly to form
its seat, so that a substantial force is required
to rotate the plug from closed to open position,
boss 31. Above lever 42, rod 32 is provided with
an enlarged portion 33, forming a shoulder 33
or vice versa, and to seal the plug.
`immediately above boss 31. The upper end 10
The angular movement of plug II is limited to
of enlarged portion 33 is coned, cooperating with
90° as shown most clearly in Figs. 1 and 3. Thus,
the boss 9 on body I0 has upwardly extending
a counterbored portion 1I of the bore 12 carrying
lugs 24 and 25, forming abutments for the op 40 push rod 32, to form a seal when the rod 32 is in
positely extending arms 23 and 21 on plate 20.
its upper or normal position. This serves to nre
vent escape of fuel from chamber 55 along rod
The means for rotating plug II will be described
32. Encircling the upper portion of rod 32 is a
later.
compression spring 15, accommodated in a coun
Within the body I3 and surrounding the lower
end of tapered seat I2, a raised annular valve seat 45 terbore 13 of bore 12. This spring is confined
between a shoulder 11 formed on rod 32 as by a
33 is formed, this seat being concentric with the
washer 13 and the bottom of counterbore 13. A
tapered plug seat I2. A closure structure 3| is
packing washer 13 oi' suitable'material such as
provided to cooperate with the raised seat 33.
felt is interposed between the end of spring 15
This structure 3| includes a valve closure member
32 adapted to cooperate with the valve seat 33 50 and the bottom of counterbore 13 to prevent es
cape of fuel between rod 32 and its supporting
and made of some suitable yielding material,
bore 12, when rod 32 is depressed.
such as "neoprene" Closure member 32 is sup
As clearly shown in Figs. '1 and 8, lever 42 is
ported on a stem 33 by means of a relatively stiff
provided with a forked end 32, the forks of which
backing plate 34, which may be of metal. 'I'he
upper portion 35 of stem 33 is of reduced diam 55 enter into groove 4I on stem 33. The opposite
eter forming a shoulder 33 for supporting plate
end 33 is also forked so as to be accommodated
34 and threaded for the reception of a nut 31.
Nut 31 serves to clamp plate 34 on shoulder 33, a
large diameter washer 33 of metal or other stiff
in a groove 84 formed in a threaded plug 35 sup
ported in a wall of body I3. The arrangement is
such that depression of rod 32 against the force
material being interposed between the nut 31 and 60 of spring 15 will cause shoulder4 53 to contact
the “neoprene” closure member 32.
boss 31, swinging lever 42 downwardly about the
Stem 33 has axially spaced hexagonal portions,
shoulder 204 of plug 35 as a fulcrum, and mov
39 and 40, of larger size immediately below the
ing valve structure 3l downwardly and away
threaded end portion 35 and defining a groove 4I
from seat 30.
l
~
for the reception of an operating arm or lever 42. 65
The position of the fulcrum for lever 42 may
The lower end of body I0 is closed by a member
be altered to secure proper operation of the valve
43 formed of upper and lower plates 41 and 43,
3i, by adjusting the threaded plug 35 in the body.
each provided with an opening 43 and 53 to ac
After adjustment it is sweated in place, to hold
commodate stem 33. 'I‘he upper plate 41 has a
it in adjusted position as well as prevent leakage.
circular upset portion or hollow boss 5I for the 70
It is desirable to prevent rotation of member
reception of packing 52. This packing may be
32 with respect to seat 30. In this way, any tend
felt or other suitable material. -’I‘his boss 5I also
ency for the member 32 to wear by friction on
serves to space openings 49, 50 apart so as to bet
the seat 33 is eliminated. For preventing this
ter serve as a guide for stem 33. The arrange
rotation the forked end 32 of lever 42 has down
ment is such that the valve closure structure 3l 75 turned lugs or cheeks 33 (Figs. 7 and 8) ar
asoaen
5
so feras to force ball III entirely of! cam ||1 are
ranged to engage opposite faces of the hexagonal
provided and will be described shortly. Hence,
portion 40 of stemßl.
when the turning force on cap ||0 is released,
Provisions are made for maintaining valve A3|
open against the torce of spring 16 as well as
against the pressure of the fluid in chamber 80.
For this purpose use is made of an electromag
net 90 supported .in a housing 9|. This housing
9| which may be of light sheet metal is secured
over the lower end of body I0 in any convenient
manner as by screws 92. A gasket 93 is inter
posed between the housing 9| and the body I0 to
prevent escape of fuel. Housing 9| andgasket
93 cooperate to hold closure member 48 in place
on body | 0. Housing 9| has a depression 95 for
receiving the horizontal portion 98 of the U
shaped core 91 of electromagnet 90. This serves
to position the core 91 along the axis of the valve
spring 18 forces rod 8Ltogether with ball ||9
upwardly until the conical closure 10 in rod 82
engages seat 1|. This upward movement of ball
||9 causes cap ||0 to move in the direction op
posite ,to that indicated by arrow |20. It will be
noted :that ca ||0, plug' || and valveA closure
structure '3| w th its seat 30 are disposed in co
axial relationship, thus making a very compact
- structure.
The parts are so proportioned that movement
of cap ||0 in the direction of arrow |20 to the
limit provided, will urge the valve structure down
wardly a suillcient distance to bring armature |03
- into contact with the faces of poles 99 of magnet
90. If magnet 90 is energized, upon release of cap
structure. For accurately positioning core 91
||0, rod 82 will be moved upwardly by spring 15
transversely of the valve structure, use is made of
a light sheet metal stamping 99, or similar mem 20 as just described, but valve 3| will be retained in
>its lower position by magnet 90; spring 65 is
ber formed in any other desired manner havingthereby compressed and has insufficient strength
openings to receive the legs 99 of core 91. Mem
to overcome the magnetic force of magnet 90 upon
ber 98 is secured in position by having out turned
armature |03. All parts will then be as shown
lugs |00 engaged under gasket 93. A substan
tially complete enclosure, separate from the valve 25 in Fig. 2. If, however, magnet 9_0 is not ener
gized, valve 3| will move upwardly to closed po
passages, is thus secured for the electromagnet
sition along with rod 62 by virtue of the force of
core and its coil |25; and stamping 98 closely
spring 15. Similarly if at any subsequent time
confines this coil in the space formed in the
magnet 90 is deenergized, valve 3| will immedi
housing 9 I.
'
Cooperating with electromagnet 90 is an arma 30 ately be closed by spring 65.
Electro-magnet 90 is arranged to be energized
ture |03 of disc form, carried by the lower end of
by electric current generated by a thermocouple
stem 33. Stem 33 has a short neck |04 of re
generator |26 (Fig. l) supported by the aid of a
duced diameter at its lower end. Armature |03
pilot burner structure |21 so as to be heated by
has a countersunk hole |05 for the reception of
the flame |28 thereof.
neck |04.v This neck is riveted over as indicated
The pilot burner |21 may be supplied with fuel
at |08, to loosely hold armature |03 on stem 33.
as through a pipe |29, connected to a port |30
Armature |03 is thus free to rock on stem 33, and
leading into the valve body I0 just above seat 30
accordingly is free to accurately accommodate
(see Figs. .2 and 4). Accordingly wh‘en the auto
itself to the faces of poles 99, without the need
of careful alinement of magnet core 91 with re
40
spect to the axis of stem 33. This is an important
feature since it enables a minute magnetic force
exerted by magnet 90 to retain valve closure 3|
in open position, when the closure has once been
moved downwardly so as to bring armature |03
into contact with magnet poles 99. .
The means for opening the safety valve 4 will
now be described. A cap | I0 having oppositely
extending wings | || (Figs. 3 and 4) for conven
ience in operating is rotatably mounted on the
upper end of body I0.` The cap is radially as well
as axially supported on the exterior of cylindrical
matic shut-oil’ valve 3| is closed or seated the
passage of fuel to pilot burner |21 is interrupted.
The arrangement is such that when pilot flame
|20 is extinguished, electromagnet 90 v releases
armature |03, and spring 65 assisted by the flow
if)
of the fuel past seat 30 moves valve 3| to seat 30,
stopping the now of fuel between inlet and out
let chambers 55 and 56.
`
It is essential that` the passage of fuel to the
main burner be prevented during the operation
of lighting the pilot burner. Accordingly the
valve structure is arranged> so that the main cock
3 must be in closed position before the automatic
boss 9 as by a ball bearing arranged in a conven
shut oil’ valve 4 can be opened or reset. For this
tional manner and including balls | |2, inner race
purpose, cap ||0 is arranged to operate plug ||
of cock 3 through a lost motion connection, and
it is during the lost motion that the safety valve
is operated. This is accomplished by the mecha
||3 on boss 9 and outer race ||4 in a skirt-like
portion ||5. This skirt ||5 has an arcuate space
||8 (Figs. 4 and 5), formed therein„terminating
in an inclined or cam surface ||1. Supported on
stem 82 within bore 16 is a ball H8, the parts
being so proportioned that in normal position,
with the stem or rod 62 in its uppermost posi
tion, ball ||8 extends a substantial distance into
space ||6, but clears the top surface ||9 of this
space by a suitable distance. Thus, a movement
of cap ||0 in the direction of arrow |20 (Figs.
4 and 5) will cause cam surface | |1 to contact
ball ||8 and force it downwardly, within bore
18. The bore serves to prevent the ball moving
laterally. This downward movement of ball ||0
forces push rod 62 downwardly against the pres
sure of spring 15 and causes shoulder 89 to en
gage boss 61 on lever 42, swinging lever 42 down
wardly about a point on the surfaces forming
groove 04 in plug 85, and lowering valve 3| from
seat 30. Means to prevent cap ||0 from turning
nism now to be described.
Rotation of cap | I0 is caused to exert a turning
force upon plug ||, by operation upon the arms
28 and 21 attached to the plug. Thus, referring
to Figs. l and 3, the outer ends -of arms 26 and
21 are accommodated in arcuate slots |3| and
|32 formed in cap ||0. With the parts as shown
' port |3 of plug || is at 90° from port |4 and fur-_
- ther movement of plug | | in a counter clockwise
direction is prevented by the engagement of arms
26 and 21 with stops 24 and 2-5 respectively. However, further movement in a counterclockwlse di
rection o_f cap ||0 is possible due to slots |3| and
|32, this movement being restricted to an amount
necessary to depress rod 62 so as to bring valve
3| downward until armature |03 engages magnet
90. This movement is not sufficient to permit ball
| I8 to be forced entirely out of cap ||0. Cap ||0
. 2,403,611
,
7
I may be turned freely in a clockwise direction
until the ends of slots I3| and |32 engage arms
23 and 21 respectively., when further movement
of the cap ||0 will rotate plug ||. This rotation
of plug || is limited by arms 26; 21 and stops
24 and 25 to 90° which alines ports I3 and I4.
Figure 9 diagrammatically illustrates the steps
incident to resetting the automatic shut-on valve
tion |52 are enclosed in aníetal jacket or sheath
|53, of suitable material such as stainless steel'.
Jacket |53 is secured in one end 1of a tube |54,
which may be of copper, for housing the con
‘ ductors 'to be laterV described. ’I'he other end of
tube |54 is joined to the magnet housing 9| in a
gas tight manner, as by being inserted in a boss
|55 on housing 9|. In this manner, any gas or
4 and opening the main cock 3. The several ra
fuel which may leak past stem 33 into housing 9|
dial lines of this ligure correspond to various po 10 is prevented from escaping, since tube |54 and
sitions of the plane passing through the axis and
Jacket |53 are gas tight.
~
.
wings III of cap ||0. The cap ||0 is iirst'moved
'I‘ube |54 is supported by the base |56 of pilot
counterclockwise as far as possible, which opens
burner |21, which base may be in'turn supported
the safety valve 4 and corresponds in position to
by the main burner (not shown) in accordance
line |35. 'I‘his provides fuel for the pilot burner 15 with usual practice. Thus, base |56 has an aper
|21 which is lighted, passage of fuel- to the main
ture |51 through which tube |54 extends, snugly
burner being still interrupted by plug I1. After
fitting therein. The lower portion of aperture
a brief interval to allow the thermocouple |23 to
|51 is threaded for the reception of a threaded
become active, cap || 0 is turned clockwise. As
sleeve |56, closely fitting over tube |54. A collar
it reaches the position indicated by broken line 20 |60 of deformable material tapering from the~
|36, the stem 62 is released and moves to the posi
center toward each end is disposed in the space
tion of Fig. 2. If magnet 30 is energized, the
between sleeve |58 and the end of aperture |51.
safety valve stays open, as shown. If, however,
The end of the aperture |51 as well as of the
the magnet 90 is not energized for any reason,
aperture in sleeve ' |56 is slightly countersunk
such as failure to light the pilot burner, valve 4 25 to receive the adjacent end of collar |60. As the
will at once close. Continued movement of cap
sleeve |58 is screwed in against collar |60, the
||0 in a clockwise direction will ñrst cause the
ends of the collar are Vcompressed inwardly
lost motion between arms 26, 21 and slots |3|, |32
against tube |54, securely holding it in place.
to be taken up, as indicated by radial line |31.
Conductors |5| and |50 are formed of dis
After this motion is taken up. plug I I of the main 30 similar metals or alloys capable of withstanding
cock 3 will be turned, bringing ports I3 and |4
the temperature to which they will be subjected.
into communication at about line |38 and into
Such alloys, for example, are Chromel and Copel
full register at line |33. Obviously, if pilot burn
respectively. Since Copel is relatively inexpen
er |21 is lighted the main burner will now be
sive, and to simplify the construction of the ther
lighted. But if the pilot burner |21 is not lighted 35 mocouple, one of the conductors as for example
or becomes extinguished, the automatic valve 4
element |50 is formed of a continuous piece of
'remains closed or closes and takes control of the
4Copel wire of a suitable gage and appropriately
main burner away from cock- 3. It will also be
insulated, as by a very thin coating of enamel.
obvious that opening or resetting of valve 4 is only
This Copel wire | 50 extends from junction |52
possible while the main cock 3 is closed. It is 40 into housing 9|, where it is joined to one lead of
thus possible to light the pilot in perfect safety.
coil |25 of electromagnet 90. Since Copel has a
'I'he main burner can be controlled as desired
resistance not so great as that of Chromel, there
by cock 3 as long as the pilot is burning. Thus,
is no intolerable power loss through this conduc
as diagrammatically shown in Fig. 10, with the
tor. The conductors |50 and |5| may be quite
plug valve fully open, cap I I0 is turned counter 45 tightly engaged in sheath I 53. The bare con
clockwise, taking up the lost motion between arms
ductors I5| and |6| are thereby grounded to the'
26, 21 and slots |3I, |32 as indicated by line |4|,
sheath', but this of course is not effective to cause
and turning plug || to bring ports I3 and I4 out
short circuiting, in view of the thin layer of in
of communication as indicated by line |42 and
sulation on the other conductor |50. 'I‘he other
fully closing the plug valve when line |43 is 50 conductor |5| is formed of Chromel, and is re1
reached. This position corresponds with that of
atively short, being joined to a copper conductor
line |36 of Fig. 9 and the plug valve or cocka
|6| as by fusion or welding at junction |62. The
may be turned from the opened position of line
Chromel conductor |5| has a thermoelectric
|42 to closed position of line |42, or vice versa
characteristic quite similar to that of the copper
as’ desired.
55 lead |6|. This lead |6| extends through tube
If the pilot ñame |28 becomes extinguished,
| 54 and is Joined to the other terminal of coil
and it is desired to reset the automatic shut-off
|25. Since the conductor |50 is insulated for its
valve 4, the plug valve is turned counterclockwise
entire length, the conductor |5I, its associated
through the closed position indicated by line |43
lead |6| and the cold junction |62 can be left
(Fig. l0) to a position indicated by line |44. This 60 Without insulation. '
corresponds to position |35 of Fig. 9 in which the
Due to the small mass of the conductors form
automatic shut-off valve is opened as described in
ing the thermocouple structure, there is little
connection with that figure.
'
delay, after the pilot ñame |23 is extinguished,
Due to the fact that armature |03 is mechani
in equalizing the temperatures, and the genera
cally moved into contact with poles 99 of magnet 65 tion of power stopped, resulting in a rapid closure
00, it is possible to control the automatic valve
of the safety valve.
y
3| with very small electrical power such as one
or two milliwatts. This required low power per
mits the use of a very simple thermocouple |26.
Referring to Fig. 1. it will be seen that the
thermocouple structure |26 employs a single hot
junction and that the thermocouple elements |50,
Furthermore, the temperature differential from
the hot junction |52 to the cold junction formed
at the end of the conductor |50 Where it joins the
electromagnet is quite large, and there is a con
sequent improvement in the amount of power
generated.
The thermocouple structure illustrated herein
is described and claimed in an application Serial
|5| are joined as by being fused together at their
upper ends |52 to form this hot junction. The
elements |50 and |5I, as well as the fused junc 75 No. 503,791, ñled September 25, 1943, in the name
2,409,011
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.
\
9
.
v
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of William A. Ray, and entitled: “Thermocouple
'rod |9| with valve |86; Ipthis case, however, ’
structure."
When there are individual burner units of a
multi-unit furnace to be controlled separately, a
push rod |9| is heldin its lower position> when valve |86 is maintained open (as by the previous»
ly described electromagnetic means 90),' by a pin
20|, which ‘connues lever 200 against a shoulder
slightly modified form of valve'is used. The fea
tures wherein the valve which differs from that
just described are illustrated in Figs. li‘and 12,
while Fig. 13 illustrates diagrammatically a multi
unit furnace system, in which the valve is in
corporated.
The furnace is generally indicated by |18, and
202 ongrod |9|, suitable clearance being provided.
A compression spring 203 is confined b'etween
shoulder 40 on valve stem 33 and boss 6| on clo
` sure member 46, to'assist in urging valve- |38
to its seat 30 when released by magnet 90.
When valve |86 is to be reset, valve |81 is
as shown includes four substantially identical
units each heated by a burner |16, having a pilot ~
opened through the channel |98, and allows fuel
to pass to pilot burner |11, which' when lighted>
burner |11, serving to heat a controlling thermo
couple |18. It is to be understood that the fur
matic valve |86 as well as valve |81 open. Cock
energizes thermocouple |16 and holds the auto
nace |18 is used for heating a single space, such
|86.may-then~ be utilized to control burner |16.
as a large auditorium, and is controlled as a unit
in any preferred manner, as for example by a
- subject however to the master valve |8I. If the
pilot flame is extinguished, the automatic valve ‘
thermostat shown diagrammatically at |19, or by
|86 as well as valve |61 both close; thus no fuel
can pass tovthat unit of the furnace |10 under
a. time or manual switch. A source of current,
such as a. step down transformer is indicated
at |80, by means of which switch |19_operates
an electromagnetically actuated master valve
|8|. Valve |81 controls the passage of fuel from
consideration, nor to its pilot. This is particu
larly important in using a fuel which is heavier
than air, for `example butane, since if such fuel
is allowed to escape through the extinguished
a suitable source (not shown) through a conduit 25 pilot burner, it gathers-in the low areas in and
|82 having branches |83 leading respectively to
about the furnace, and forms a, dangerous ex
each of burners |16. Each branch |83 has a reset
plosive mixture.
v
valve |84 interposed therein, including a main
What is claimed is:
cock |85 (Fig. 12) and an automatic shut-off
1. In a fuel valve structure, a rotary plug, a
|88 which operates to control the passage of fuel 30 valve body forming a seat in which said plug is
to the associated burner in exactly the same man
accommodated, said plug being operable to con
ner as cock 3 and shut-off valve 4 of valve struc
trol the passage of fuel by way of the plug, said
ture l, in the first described form of the inven-f’
plug having for that purpose a passageway open
tion. The valves |84 enable one or more units of
ing in one end of the plug, said body adjacent
the furnace |15 to be rendered inactive, thus im 35 the end of said passageway having means form
proving the adaptability and flexibility of the sys
ing a safety valve seat, a .safety valve closure
tem to different operating conditions.
adapted to cooperate with said safety valve seat
It is obviously essential that the pilot lights | 11
and movable toward and away from the seat, a
be supplied with fuel even when the master valve
lever capable of being'actuated to move said
|8| has been closed by switch |19. Accordingly, 40 safety valve closure, means for retaining said
the supply of fuel for the pilot burners is taken
closure in open position, means for operating the
out from pipe |82 at some point between valve
rotary plug, and means whereby said operating
|8| and the source of supply, as via connections
means may be moved while the rotary plug re
|91, |98. Thus the fuel for each pilot |11 is sup
mains in closed position, for actuating the lever
plied independently of the supply of fuel in~ 45 to open the safety valve.
'
branch pipes |83; and arrangements are made
2. In a fuel valve structure, a 'rotary plug, a
whereby the fuel supply to each of the pilots |11
valve body forming a seat in which said plug is
is controllable independently of the other pilots.
accommodated, said plug being operable to con
trol the passage of fuel by way of the plug, said
For this reason, the reset valves |84 each have
supplemental valve means generally indicated by 50 plug having for that purpose a passageway open
|81 (Fig. 11) for controlling the fuel supply for
the associated pilot burner |11, port |30 and the
connection |29 therefrom being omitted.
'
ing in one end of the plus'.> said body adjacent
the end of said passageway having means form
ing a safety valve seat, a safety valve closure
Referring to Figs. 11 and 12, valve |84 has a
adapted to cooperate with’said safety valve seat
body |90 similar to body |0 of the first form 55 and movable toward and ‘~ away from the seat,
a lever capable of being actuated to move said
of valve described, within which the plug cock
|85 is arranged to be rotated by the winged cap
safety valve closure, means for retaining said
closure in open position, a -rotary actuator for
H0, all as before. Push rod or stem |9| is actu-`
ated to unseat the automatic shut-off valve |86
the plug and coaxial therewith, said actuator
by the cam surface ||1 in the cap. In this form,
having a lost motion connection with the plug,
the push rod |9| additionally functions as a valve
and means operable during the lost motion, for
actuating the lever to open the safety valve.
control for the pilot |11. Thus bore |92 in which
the rod |9| slides is intersected by 'alined ports
3. In a fuel valve structure, a, rotary plug, a
valve body forming a seat in which said plug is
|93 and |94, one of which, for example.|94 is
connected to the associated pilot burner |11 by 65 accommodated, said plug being operable to con
trol the passage of fuel by way of the plug, said
a conduit |95. The other port, |93, is connected
plug having for that purpose‘a passageway open
to the fuel supply line |82 by conduit |86, |91.
ing in one end of the plug, said body adjacent
Push rod |9| is encircled by an annular groove
’ the end of said passageway having means form
|98 which is adapted to establish communication
between ports |93~and |94 only when the push 70 ing a safety valve seat, a safety valve closure
adapted to cooperate with said safety valve seat
rod |9| is depressed to unseat valve |88. For
this reason it is necessary that rod |9| be main
and movable toward and away from the seat, a
lever capable of being actuated to move said
tained in its lower position as long as valve |88
safety valve closure, means for retaining said
is open. Thus an operating lever 200 similar to
lever 42 is provided for operatively connectingv 75 closure in open position,l a rotary actuator for
2,403,611
12
the'plug and coaxial therewith, said actuator hav
ing a lost-motion connection with the plug, and
means operable during the lost motion, for actu
ating the lever to open the safety valve, compris
ing a cam carried by the actuator, and a push
rod operating on the lever and adapted to be
moved by the cam.
4. In a fuel valve structure, a rotary plug, ay
valve body forming a seat in which said'plug is
accommodated, said plug being operable to con
trol the passage of fuel by way of the plug, said
adjacent the open end of the plug, a valve mem-
ber cooperating with said seat, means for rotat
ing the plug to cause said radial port to cooper
ate with the port in said seat or to interrupt com
municationk between the last mentioned ports, and
means actuated by the means for rotating the
plug for unseating the valve member when the
said -communication is interrupted.
y
9. In reset valve. a plug cock, a valve for con
plug having for that purpose a passageway open
trolling the- passage of fluid through the plug
cock, and a rotatable cap, said cock, valve, and
cap being arranged in coaxial relationship, means
ing in one end of the plug,- said body adjacent
including a lost motion connection whereby rota
the end of said passageway having means form
ing a safety valve seat surrounding said end, a
tion of the capV serves to rotate the plug from open
to closed position, and means whereby rotation
of the cap after closing the plug cock unseats the
valve.
safety valve closure adapted to cooperate with
\ said safety valve seat and movable toward and
away from the seat, and a common rotary means
for causing operation of the plug and the safety
valve closure by angular movement of said com
mon means about the axis of the plug.
5. In a fuel valve structure, a rotary plug, a
valve vbody forming a seat in which said plug is
accommodated, said plug being operable to con
trol the passage of fuel by way of the plug, said
plug having for that purpose a passageway open
10. In a reset valve, a main cock, and a valve
for controlling the passage of fluid through the
main cock, means for opening and closing said
cock, means for opening the valve, comprising a
pivotally supported lever and a push rod, means
to depress the push rod, a shoulder on the push
rod adapted to engage said lever and move it
about its support when the rod is depressed to
unseat the valve, means to return the push rod
ing in one end of the plug, said body adjacent
to its initial position, and means energized by the
the end of said passageway having means form
return of the push rod to its said initial position
ing a safety valve seat, a safety valve closure
for seating the valve when the valveis released.
adapted to cooperate with said safety valve seat 30
11. In a reset valve, a main valve, and an auto
and movable toward and away from the seat, said
matic shut-oil.’ valve for controlling the passage
closure including a non-circular stern, and means
of fluid through the main valve, said valves hav
for moving said safety valve closure, said means
ing a common axis, a housing for supporting and
engaging said stem to restrain said closure against
enclosing said valve's, a cap rotatably supported
rotation.
35 on the housing coaxially with the valves, said
6. In a fuel valve structure for controlling the
main valve having a closure> member arranged
flow of fuel to a main burner and a pilot burner,
for operation by rotation of said cap, means form
means forming a safety valve seat, a movable
ing a lost motion connection between said cap
closure for the seat, means including an axially
and said closure member, a push rod arranged to
movable rod for operating said closure, and a 40 open said shut-off valve upon movement in an
guide for the rod, said guide and rod being ar
axial direction, said push rod being spaced from
ranged to provide alined passages only when the
said axis, means including a cam surface on said
closure is moved oil' its seat, to form a valve for
cap whereby rotation of the cap causes said rod to
move in an axial direction, and means forming an
the supply of fuel to the pilot burner. l
7. In a reset valve, a tapered rotary plug hav
45 operating connection between the push rod and
ing a radial port as well as an axial port in com
the shut-oil’ valve.
munication therewith, said axial port having an
12. I_n a fuel supply system having a main fuel
opening at one end of the plug, a body having
valve, as well as arr' automatic shut-oil’ valve,
a bore forming a tapered seat for the plug and
for controlling the passage of fuel to a burner,
having a port adapted to cooperate with said 50 the shut-oil valve when closed preventing the
radial port, said bore extending beyond the plug, `
passage of fuel through the main valve. said shut
an annular seat surrounding the end of the bore
adjacent the open end of the plug, a valve mem
ber cooperating with said seat, means for rotat
ing the plug, and means operated by rotary move
oil‘ valve having a mechanical reset for tem
porarily opening the shut-olf valve, a housing for
supporting and enclosing said valves, said main
55 valve having a closure member movable through
ment of the means for rotating the plug, for un
apdistance for opening and closing the main valve,
seating the valve member.
8. In a reset valve, a tapered rotary plug having
means for moving said closure between its open
Í and closed positions, and mechanism operated by
a radial port as well as an axial port in com
said means at the end of the closing movement
munication therewith, said axial port having an 60 of the closure for opening the shut-off valve,
opening at one end of the plug, a body having
comprising a lever pivotally supported in said
a bore forming a tapered seat for the plug and
housing, a push rod adapted to operate said
having a port adapted to cooperate with said
lever, and a cam surface carried by said means
radial port, said bore extending beyond the plug,
an annular seat surrounding the end of the bore
'for operating the push rod.
WILLIAM A. RAY.
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