close

Вход

Забыли?

вход по аккаунту

?

код для вставки
Sept. 27, 1949.
F. A. GAUGER
2,433,191
AUTOMATIC LIGHTING AND CONTROL
MEANS FOR GAS BURNERS
Filed June 24, 1946
I!
3 Sheets-Sheet l
‘ q
|
\m
|
|
I
.
'
N
0
.
vLL.
‘Ins-:27?“ '
(‘0
i
-S
F‘:
‘
gr
(Q
\
wP
INVENTOR.
FRANK A. GA‘UGELR
BY
ATTORNEY
Sept; 27, 1949.
F. A. GAUGER
AUTOMATIC LIGHTING AND CONTROL
MEANS FOR GAS BURNERS
Filed June 24, 1946
I
2,433,191
3 Sheets-Sheet 2
OOZOSZOO‘E
Illllll
@
3He».
\HVENTOR
FRANK A‘éauem
5* Q12: Ari/04k
ATTORNEY
Sept 27, 1949.
F. A. GAUGER
2,483,191
AUTOMATIC LIGHTING AND CONTROL
MEANS FOR GAS BURNERS
Filed June 24, 1946
I5 Sheets-Sheet 3
////////¢/énmnu
:
‘
III’A
10>‘?
'
VII/A
é
50
{3
4b
5!
87
I5
7\
8b
@
m
y
4'']
5I
EA"
[3
/4
\
FIG. 6
35
‘8
3n
89
4b
8\
1
Y
b9
\\\_\\\\\~
‘
'
:
AP
I
I
\3
'7
5:\
@
f \
f \
_
_
5o
5'
’
INVENTOR.
FRANK A. (JAUGER
FIC3._ 7
an
'
BY
m Kan?“
ATTORNEY
Patented Sept 27, 1949
2.483.191, i
UNITED STATES PATENT
v
2,483,191
AUTOMATIC LIGHTING AND CONTROL
MEANS FOR GAS BURNEBS
Frank A. Gaugen Milwaukee, Wis.
Application June 24. 1946, Serial No. 678,989
3 Claims. (Cl. 158+117.1)
.
r
2
Further objects are to provide a system of con
trol for oven burners or other gas burners which
and control means for gas burners, particularly
is so organized that it may be used with clock
for oven burners.
'
control means to control the turning on of the
This invention is an improvement over that
disclosed in my copending application Serial No. 5 gas to the main burner and the cutting off of
the gas to the main burner, or in which clock
614,970, ?led September 7, 1945 and now matured
control means may be employed only to cut oil
into Patent No. 2,478,386 for Automatic lighting
This invention relates to automatic lighting
pending application I disclosed means for light
the gas to the main burner, or in which manual
means alone may be relied upon without the use
ing an oven burner located below and laterally
of a constantly burning pilot burner, as in the
type of gas stove known as the table top type.
In my copending application I disclosed
of clock control means, however, in all instances
maintaining the safety features of insuring a time
delay before the gas has been turned on to the
main gas burner and to insure the lighting of
and control means for gas burners.
In’ my co
electromagnetic valves controlled by thermo
a suitable pilot burner before any gas can reach
couple means associated with the main gas cock 15 the main gas burner and to provide against in
advertent turning on of the gas to the main gas
and oven regulator and with clock control of
burner at a time when no pilot burner is burning.
the electromagnetic valves. In the device which
An embodiment of the invention is shown in
was disclosed in my copending application all of
theaccompanying drawings, in which:
the control‘ was from a main gas cook. In this
copending application the disclosure included a 20 Figure 1 is a diagrammatic view of the ap
paratus.
dwell for the main gas cock so that it had 'to be
Figure 2 is a view partly in section showing the
turned first to a predetermined position and after
main valve assembly.
a period of time turned to a second and ?nal
Figure 3 is a sectional view on the line 8—3
position.
This invention is designed to eliminate the
necessity of waiting or allowing for a dwell in the
of Figure 2.
_
Figure 4 is a sectional view on the line 1-4
of Figure 2.
operation of the main gas cock.
. Objects of this invention, therefore, are to pro
Figures 5, 6, and '7 are sectional views on the
vide a valve assembly associated with thermo
lines 5-5, 6—-6, and 1-1, respectively, of
' couple means so that control of all of these 30 Figure 2.
means is obtained from the main gas cock with
out requiring any dwell of the main gas cock
'
Figure 8 is a developed view of the valve of the
main gas cook.
Figur\ 9 is an expanded view of a shank por
but allowing the operator to set the main gas cock
‘at the desired temperature immediately on the
tion of the\handle and parts associated therewith.
initial opening of the main gas cock and to pro 35
Figure 10_is a sectional view of a portion of
vide novel time delay means which is thoroughly
the handle and associated parts.
_
reliable and independent of any mechanical de
Figure 11 is a sectional view on the line il—l|
vice which might get out of order.
of Figure 10.
'
Referring to the drawings, particularly Figure
Further objects are to provide a ?ash tube
pilot burner and a second pilot burner and to
provide for the transfer of the ?ame from the
?ash tube pilot burner to the second pilot burner
and to thereafter cut oil’ the gas supply to~the
by the reference character I, the oven chamber by
main gas cock is closed until the thermocouple
scribed, is arranged to connect the pipe 5 with
1, it will be seen that an oven has been indicated
the reference character 2 and the burner chamber
by the reference character 3. The burner is in- '1
?ash tube pilot burner.
dicated by the reference character 4 and is
_A further speci?c object is to provide a main 45 located within the burner chamber 3. It is sup
taining pilot burner adjacent the oven burner
plied with gas by means of a pipe 5 which,’
through the agency of valves hereinafter de
which is arranged to continue to burn after the
means becomes ineifective to hold the electro
the main gas supply or manifold 6. The main
'magnetic valve means in initial position, to 50 valve in the system consists of a combined main
thereby guard against failure of lighting the oven
burner if the main gas cock was closed and im-'
mediately opened before the thermocouple means
had cooled sufficiently to release the electro
magnetic valve means.
’
gas cook and oven regulator 1 controlled jointly
by means of the thermostatic vbulb 8 located in
the oven chamber and the handle or manipulat-_
ing member 9. The automatic thermostatic con-‘
55 trol means controls the valve l2, see Figure?gi
3
“earn
which valve is connected in series with the main
manually operable gas cook or valve indicated
generally by the reference character ‘I which
latter is equipped with the manually operable
rotary valve IS. The combined oven‘ regulator
and main gas cock is well known and a detailed
description thereof will not be given. For in
stance, it could be of the general type disclosed
in the patent to Weber et al., Serial No. 2,303,011
conducting tube may be of any suitable type. such
for example as that shown in my copending ap
plication, Serial No. 521,201, ?led February 5, 1944,
for Automatic lighting and control means for gas
burners.
It is to be understood that the thermocouple 38
. is constantly heated by the constantly burning
remote pilot burner 31 and that the thermocou
ples 21 and 38 are arranged to be heated by the
10 oven pilot burner 44.
of November 24, 1942 for a Valve.
It is to be understood in reference to Figure 1
A normally closed valve indicated generally by
that such ?gure is a diagrammatic view and that
the reference character I4 and a normally open
many of the various passages to and from the
valve indicated generally by the reference char
acter l5 are in series with the main gas cook and .
several valves are indicated as pipes, whereas in
oven regulator valve ‘I, and these three valves 15 reality they are for the most part passages or
ducts formed in the unitary valve assembly, the
jointly control the flow of gas to the burner 5.
main gas cock 1 and the valves l4 and I5 being '
The valve I4 is provided with a disk i6 which is
formed as a unitary valve assembly as shown in
urged towards closed position by means of the
Figures 2 and 3 of the drawings. It will be seen
spring II. The valve i5 is provided with a disk
It which is urged towards open position by means 20 from reference to Figure 1 that communication
between the vgas supply manifold or pipe 8 and
of a spring [8. For the sake of clearness in Fig
the intermediate compartment 45 of the valve
ure 1 the spring |_9 has been located exteriorly of
assembly is controlled by means of the valve is
the main casing, but from Figure 3 it will be seen
and that communication between the interme
that in reality the spring I9 is located interiorly
diate chamber 45 and the chamber 48 is controlled
of the casing. The valve I8 is connected to the
by means of the valve I8. The chamber 48 com
armature 28 of an electromagnet 2| and the valve
municates by means of the passageway 41 with
|8 is connected to the armature 22 of a double
the main gas cook or valve ‘I, which in turn com
electromagnet 23. The electromagnet 2| is pro
municates by means of the pipe 5 with the oven
vided with windings 24 and the electromagnet 23
burner 4 under certain conditions hereinafter set
is provided with a pair of windings 25 and 28.
forth in detail. The valve assembly is shown in
The windings 24 are connected in circuit with a
considerable detail in Figures 2 and 3 and dia
thermocouple 21 and, if desired,_with a clock in
grammatically in Figure 1. From these figures,
dicated generally by the reference character 28
particularly Figures 1 and 3, it will be seen that
and provided with a switch 28 which is normally
a pair of small auxiliary valves 48 and 49 are pro
closed. The windings 25 are connected in circuit
vided and control passageways 50 and 5|. The
with a thermocouple 38 and with a clock indicated
passageways 58 and 5| under a certain setting of
generally by the reference character 3| provided
the main gas cock communicate, respectively,
with a switch 32 which is normally open. The
with the pipes 52 and 53 which lead to the oven
windings 28 are connected in circuit with a ther
mocouple 33 and with a switch 34, which switch 40 burner 44 and the ?ash‘back burner 4|.
It is to be noted that a small passageway 54 ex
is opened when the main gas cook and regulator
tends from the intermediate chamber 45 to the
valve are in off position and is closed when the
passageway 58. This allows a regulated amount
main gas cock and regulator valve are in open
of gas to pass to the oven pilot burner 44, the
position. The clock 28 constitutes the g‘oif" clock
and the clock 3| the “on” clock. If desired, a 45 regulation being determined by the setting of the
needle valve 54', see Figure 4.
manually operable switch 35 may be placed in
In addition to these passageways 58 and 54, a
parallel with the switch 32 of the clock 8| and a
passageway 55 by-passes the main gas cock ‘I and
switch 38 may be placed in parallel with the
extends to the pipe 52 leading to the pilot burner
switch 29 of the clock 28. If manual operation
alone is desired, without clock control, both 50 44. It is provided with an adjustable needle valve
switches 35 and 38 are left closed. Obviously if
or screw 58, as shown in Figure 4, and as dia
grammatically indicated in Figure 1. This mini
it is desired to have no clock control at any time
mum ?ame adjustment provides a very small
both clocks 28 and 3! and both switches 35 and
38 may be dispensed with and the electrical cir
?ame su?icient to ignite the oven burner but in
cuits permanently closed at these points.
. su?icient to heat the thermocouple 21, or as a
matter of fact the thermocouple 38. The purpose
As shown further, referring to Figure 1, it will
of this minimum by-pass will appear as the de
be seen that a constantly burning pilot burner 31
scription proceeds. It is to be noted also that the
is provided and is preferably of the hooded, ven
?ow of gas through the passageway 5| is deter
tilating type used to light the top burners, not
shown. This constantly burning pilot burner is 60 mined by the setting of the needle valve 58', see
Figure 7.
.
located at a point above and usually laterally of
the oven l as, for example, in the table top type
The conical valve l3 of the main gas cock ‘I is
of stove. A ?ame conducting tube-like member
rotated by means of the manually adjustable
38, of any suitable type, is employed and has its
handle or member 8. This handle is carried by
upper end adjacent the constantly burning pilot
means of a shaft 58 spring-pressed outwardly as
indicated at 58 and formed rigid with a sleeve
‘burner means 39. This tube 38 constitutes a ‘
88, see Figures 2 and 9. The sleeve 80 is provided
with an enlargement or collar-like portion 8|
?ame conducting or ?ash-back tube and hasa
lateral extension 40 which extends to a point ad-.
rigid therewith and equipped with a notch 82
iacent a ?ash-back tube pilot burner 4| which is 70 and a small keyway 83 in its inner side as shown
provided with a burner tip 42 and with a laterally
in Figure 9. The keyway 83 slidably receives a
positioned ?ame outlet 43. A pilot burner 44 is
projection 84 on the_split collar 85. The split
located in lighting relation to the ?ash tube pilot
collar 85 is also provided with a projection 88
burner 4| and in lighting relation to the oven
which is adapted to ?t within the notch 82. The
burner 4. As stated, the ?ash-back tube or ?ame ‘(5 split collar 85 has a pair of rearwardly extending
burner 31 and its lower end adjacent a charging
.
-_
‘9,488,191
?ngers 81- which are slldably received within the
slots or keywavs 88 in a collar 68. The member
88 has a spring fit within the member 88 and its
enlargement. The stop 88 is adapted to engage
a stationary stop 18, see Figure 11, to limit the
" rotation of the manually operable valve 13. The
member 68, see Figure 9, is'rigidly fastened on
the reduced extension ‘ll of the rotary valve I8.
wardly as viewed in‘. Figure
6 3 and moves the valve
I8 to closed position and the armature 22 into
engagement with the electromagnet 28. Also
moving of the knob 8 closes the switch 84 and
allows energization of the coil 28 of the electromagnet 28, through the agency of the thermo
couple 88 which is heated from the constantly
burning pilot burner 81. The rod 8| is, therefore.
held in its innermost position. It is to be noted
is turned the rotary valve I3 is also turned. The 10 that when the valve l8 moves inwardly it engages
the hub or collar 88 and moves the valves 48 and
rotation of the rotary valve I8 determinesthe set
ting of the oven regulator section 12 of the valve
48 to open position. This allows gasto pass
It is apparent, therefore, that as the handle 8 '
assembly in accordance with the usual'practice.
It is to be noted from Figure 10 that the inward
sliding motion of the hollow shaft 88 or sleeve is
yieldingly resisted by a spring 18 which serves
to assist in returning the hollow shaft 88 to its
original position.
through the passageway 8| through the manually
controlled valve ‘I to the charging pilot burner
4| which, through the medium of the chareing
tip 88, charges the ?ash tube 88 with a com
bustible mixture. Flame is now propagated
.through the tube 88 and its branch 48 and lights
the tip 38 and the tip 42 as well as the combusti~~
The hollow shaft 88 is provided with a ?ange
‘I4, see Figure 2, which coacts with a cam portion 20 ble mixture passing from the lateral ‘opening 48.
15 to rock a lever 16 inwardly when the/ knob or
Simultaneously, gas passes through the passage
handle portion 8 is pushed inwardly. The lever
way 58 through the manual valve ‘I to the oven
15 is provided with a roller 11 at its outer end
pilot burner 44 which is in lighting‘ relation to which depresses the member 18.
the opening 43 of the charging pilot burner 4|.
The member 18, see Figure 3, is provided with 25 The oven pilot burner is, therefore, lighted. ‘
a spring ‘I8 which holds the collar 88 of the rod
It is to be noted also that inward motion of the
8| against the inner end ‘of the member ‘I8. The
rod 8| opens the valve l6 and allows gas to pass
spring 18 is heavier or stronger than the spring
from the manifold or supply pipe 8 past the
I8. The rod 8| carries the valve l8 and is ex
, valve It to the intermediate chamber 45 and from
tended as shown in Figures 1 and 3 so as to de 30 this chamber through the passages, immediately
press or open the valve l6 when the rod 8| is
pressed inwardly.
The small auxiliary valves '48 and 48 are car
ried by a spider-like member 82 which is pro
vided with a sleeve 83 arranged to be depressed
by the valve l8. The member 82 is urged towards
valve closed position by the spring 82'. The rod
8| is slidable with reference to the valve l8 and
is provided with an inner stop 84 against which
the valve I8 is held by means of the spring 85.
The development of the manually operable ro
tary valve l3 of the main gas cock ‘I is shown in
Figure 8 and it will be seenthat it‘ has a main ‘
relatively large groove 88 which is arranged to
communicate with‘ the main passage 41, see F18
ure 2, and to} allow gas to pass to the oven regu
lator valve l2 and, from there to the burner 4]
when the automatically controlled electromag
hereinabove described, to the charging pilot burn
er 4| and to the oven pilot burner 44. However,
it is to be noted from reference to Figure 1 that '
the valve 18 is now closed and consequently no
gas can pass through the passage 41 to the pipe,
5 leading to the oven burner 4.
When the thermocouple 38 has been heated
from the oven burner 4, the current generated
thereby causes the bucking coil 25 of the electro
magnet 23 to neutralize the holding effect of the
coil 26 and consequently allows release of the '
armature 22, thus allowing the biased valve to
move to open position. It is to be noted that the
valve It does not close as its armature 28 is held
by the electromagnet 2| as the coils 24 thereof
have been energized due to the heating of the
thermocouple 21. In this connection it is to be
noted that the initial inward motion of the rod
8| forces the armature 28 of the valve it into
engagement with the electromagnet 2|.
Fuel is now supplied the burner and the burner
netic valves are in their proper position as will
hereinafter lie-described. The rotary valve I3 is
hollow and a plurality of apertures 81 open from
the main slot 88 into the hollow interior-of the
lights from the oven pilot burner 44. < It is to be
valve |3. The valve I3 is also provided with
noted that when the valve l8 has moved to open
elongated slots 88 and 89. The slot 88 is arranged
to establish communication between the pas 55 position that the small valves 48 and 48 are closed.
The valve 48 cuts off a supply of gas to the flash
sageway 58 and the pipe 52 which leads to the
tube charging pilot burner 4|. The valve 48 cuts
oven pilot burner 44. The slot 88 is adapted to
off the excess or line pressure supply of gas to
establish communication between the passage
the oven pilot burner 44. However, a regulated
way 5| and the pipe 53 leading to the ?ash tube
pilot burner 4|. The segment x in Figure 5 60 amount of gas passes through the passage 54 to
the oven pilot burner 44 and maintains the proper
closes the passage 58 in the position shown. The
size of pilot ?ame for heating the two thermo
segment Y in Figure 6 closes the passage 41 in
couples and for igniting the oven burner.
the‘ position shown. The segment Z in Figure 7
It is to be noted also that there is minimum
closes the passage 5| in the position shown.
?ame adjustment provided by the needle valve
The switch 34, heretofore mentioned, is con
trolled from a cam disk 84' carried by the shaft - 55 which controls the flow of gas through the
passageway 55 as a by-pass supply around the
58. This switch is in series with the thermocou
- valve 1 to the oven pilot burner 44. The purpose
ple 33 and the coils 28 of the electromagnet 23
of this minimum supply vis apparent when it is
and is open when the main gas cock is closed.
‘It is arranged to close as soon as the knob or han 70 considered that sometimes the operator will cut
off the manual valve 1, thus cutting off supply
die 8 is turned towards valve open position.
of gas‘ to the oven burner and direct supply of
The operation of the apparatus is as follows:
gas to the oven pilot burner 44. However, there
The knob or handle 8 of the main gas cock ‘I is
is a minimum supply .of gas through the passage
turned to the desired temperature indication and
is pressed inwardly. This moves the rod 8| in 75 way 55 to the oven pilot burner 44 and this main—
assaioi
,
‘I
.
tains a small ilame at theoven pilot burner 4|
so that ii the operator should immediately re
open the manually controlled valve ‘I, the oven
burner will be lighted and the safety oi the ap
paratus will be maintained.
- The reason for this is that the thermocouple
ll does not instantly cool and, thereiore, the
into their correct positions as hereinabove de
‘scribed.
- Although this invention has been described in
considerable detail, it is to be understood that
such description is intended as illustrative rather
than limiting, as the invention may be variously
embodied and is to be interpreted as claimed.
Itclaim:
valve II will be held open for an appreciable
length of time until the thermocouple 21 has
l. The combination of a main burner, a remote
cooled suiliciently. The minimum ?ame or mini 10 constantly burning pilot burner, a second pilot
mum gas supply through the passage ‘I is so
burner for said main burner, ?ame conducting
regulated that it is not su?lcient to maintain the
means ,between said constantly burning pilot
heat necessary for the thermocouple 21 so that
burner and said second pilot burner, charging
ii the minimum supply alone were provided the
means for charging said ?ame conducting means
~ thermocouple would cool and the valve It would
with a combustible mixture, electromagnetic
drop to closed position.
valve means _ior controlling the ?ow of fuel to
It is apparent from the description thus far
said charging means and said main burner and
given ‘that manual control alone can be used
including an electromagnet having a' ?rst wind
without the use of clock controlledswitches. As
ing and a bucking winding and arranged to hold
described hereinabove, the switches 3i and it 20 said electromagnetic valve means in a ?rst posi
would remain closed at all times. However, if
tion to interrupt fuel ?ow to said main burner
it is desired to use clock control the “011" clock
and allow tuel ?ow to said charging means when
would be set so as to close its switch 32 at the
said electromagnetic valve means has been
selected time and allow the thermocouple II to
moved to said ?rst position and said ?rst wind
oppose the action of the thermocouple 33 in ener
ing is energized, means for energizing said ?rst
winding, a thermocouple arranged to be heated
gization oi the electromagnet 23 and thus deter
mine the time at which the valve it would‘open
from said second pilot burner and to energize said
bucking winding to release said electromagnetic
and allow gas to be supplied the oven burner 4.
valve means for motion to a second ‘position to
' The clock Ii, therefore, determines the time at
which the oven burner will be turned on. Its 30 allow fuel ?ow to said main burner and cut oil!
fuel ?ow to said charging means, means for mov
ing said electromagnetic valve means to‘ said sec
ond position when said bucking winding is en
ergized. a main gas cockin series with said elec
tromagnetic valve means and controlling the ?ow
It is apparent that when the switch It is open ’
of fuel toboth said main burner and said charg
that energization of the electromagnet 2i ceases
ing means, and a switch for opening the circuit
and the valve l6 closes, thus cutting oi! all supply
of said ?rst winding when said main gas cock is
of gas to all portions of the apparatus. It'is ap
closed.
parent that when the clocks are used, the switches
2.'The combination of a burner, a ‘?rst pilot
II and It will remain open at all times. when 40 burner
therefor, a constantly burning remote
it is desired to have manual operation solely, the
pilot
burner,
?ame conducting means for light
switches 35 and it are at all times kept in a
ing said ?rst pilot burner from said constantly
switch I! is a normally open switch. The clock
a has a switch 2. which is normally closed.
This clock is the f‘OiI” clock and determines the
time at which the oven burner” will be cut oil.
closed position.
It is clear also that if desired the “On" clock
could be dispensed with and the “Oil” clock would
, be relied upon to cut oil the oven burner. Under
‘J these conditions. the oven burner would imme
_ diately come into action after the thermocouple
. had heated up following manual opening of the
main gas cock ‘I. It is also clear that if neither
clock were desired, the circuit would remain per
manently closed at these points andno clocks
would be placed in the apparatus.
burning pilot burner, charging means for charg
ing saidilame conducting means with a combusti
ble mixture, a main gas cook controlling the ?ow
of fuel to said burner and charging means and
?rst pilot burner, an electromagnetic valve biased
towards open position in series with said main
50 gas cook and said burner, thermocouple means
heated by said constantly burning pilot burner
for energizing said electromagnetic valve to hold
such valve closed. a second thermocouple means
arranged to be heated by said ?rst pilot burner
' It is to be noted particularly that time delay 55 to neutralize the e?ect of said ?rst thermocouple
is provided to insure lighting of the oven pilot
means to allow said electromagnetic valve to move
burner 44 without'any reliance being placed on
to open position when said ?rst pilot burner has
the operation of a delicate mechanical instru
heated said second thermocouple means, an
mentality. Instead this time delay or this in
auxiliary valve controlled from said electromag
suring of the lighting of the oven pilot burner 44 so netic valve for cutting o? fuel supply to said
is obtained by the bucking action'due to the
charging means when said electromagnetic valve
operation of the thermocouple 30 which is heated
moves to open position, and a clock controlled
by the oven pilot burner 44.
switch for controlling the circuit of said second
This invention, therefore, is an improvement
thermocouple means.
over that ‘disclosed in my above noted copend 05 3. The combination of a, main burner, a remote
ing application.
constantly burning pilot burner, a ?rst theme
In the above noted copending‘ application it 1 couple heated by said pilot burner, a second pilot
was necessary to have a dwell between the initial
burner for said main burner, a second ends
inward pushing of the gas cock control knob or
third thermocouple arranged to be heated by said
handle and the ?nal setting of such knob or 70 second pilot burner, a ?rst and a second electro
handle at the desired temperature. In the pres
magnetic valve biased respectively towards open
ent invention there is no dwell required. Instead
and closed positions and controlling the ?ow of
the operator merely turns the control knob or
fuel to said main burner, a main gas cock con
handle to the desired temperature setting and - nested in series with said first and second electro
immediately pushes it in, thus- setting the parts ‘ll magnetic valve, means controlled from said main
2,488,191
gas cock for moving said ?rst and second electro
magnetic valves to closed and open position, said
?rst electromagnetic valve including a main coil
10
~
controlled switches in circuit with said ?rst and
third thermocouples.
FRANK A. GAUGER.
energized by said ?rst thermocouple for holding
said ?rst and second electromagnetic valves in
REFERENCES CITED
closed and open position and having a bucking
coil arranged to be energized by said second
‘The following references are of record in ‘the
?le of this patent:
thermocouple for neutralizing the e?’ect of said
main coil to release 'said ?rst electromagnetic
' UNITED STATES )PA'I'ENTS
valve for motion to open position, said second
Name
Date
electromagnetic valve having a coil for holding 10 Number
2,340,234
Thornberry et a]. ____ Jan. 25, 1944
such valve in open position and arranged to be
energized by said third thermocouple, and clock
2,351,277
2,443,892
Mantz ___________ __ June 13, 1944
Caparone ______ __ June 22, 1948
Документ
Категория
Без категории
Просмотров
0
Размер файла
887 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа