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Патент USA US2569093

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Sept- 25, 1951
F. B. AUBERT
2,569,089
BURNER SYSTEM, INCLUDING IGNITION CONTROLLING MEANS
Filed June 19, 1946
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IN VEN TOR.
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BY
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M-KM
ATTORNEY
Patented Sept. 25, 1951
2,569,089
UNITED STATES PATENT OF F I CE
2,569,089
BURNER SYSTEM, INCLUDING IGNITION
CONTROLLING MEANS
Fred B. Aubert, Detroit, Mich.
Application June 19, 1946, Serial No. 677,874
12 Claims. (Cl. 158-99)
1
This invention relates to new and useful im
provements in gaseous fuel burning apparatus
able to heat a thermostatic element 3|8, pref
erably a bimetal operating arm or blade rigidly
and more particularly to means for controlling
secured to a base at one end and at its other
the operation of a burner igniting means.
end carrying a switch contact 3|9. The blade
An object of the invention is to provide a novel 6 3|8, when cold, or when it has cooled following
apparatus for controlling the operation of a
deenergization of coil 3“, warps to the right
gaseous fuel burner and its igniting means.
facing Fig. 1' so as to move the contact 3|9 into
Another object is to provide a safety feature
engagement with a ?xed contact 320, thereby
for gaseous fuel burner operation in the event
closing the circuit of the primary coil 32| of an
of leakage of gas to the burner or failure of the 10 ignition transformer 322, the circuit being as
burner gas supply valve to close.
follows, from the main line wire 3l5 through a
Another object is to provide means by which
wire '323 to the blade 3“? and contact 3|9 and
the ignition means will be operated for a period
from the contact 320 through a wire 323 to a
following operation to close the gas supply valve.
wire 324%2 connected to one terminal of the coil
The invention consists in "the novel arrange
32| and from the other coil terminal via a wire
ment and cooperative relation of parts in the
325 to the main line wire 3|'|. The secondary
apparatus, as will be more fully described here
coil 326 of the ignition transformer is connected
inafter and the novelty of which will be par
by wires 321, 328 to the spark ignition electrodes
ticularly pointed out and distinctly claimed.
329 positioned in cooperative relation with the
In the accompanying drawings, to be taken 20 burner 300 to ignite the gas discharging there
as a part of this speci?cation, there are fully and
from when the valve member 303 is opened. The
clearly shown several preferred embodiments of
contact 3“ is cooperable with a contact 333
the invention, in which drawings:
and is engageable therewith upon the valve
Figure 1 is a diagrammatic view of a gaseous
member 303 reaching substantially full open '
fuel burning apparatus with its control system; 29 position by operation of the cam member 307.
Fig. 2 is a diagrammatic view of a modi?ed
burner control system generally similar to that
of Fig. 1, and
When the contacts 3| I and 330 are engaged with
each other, a circuit will be established to the
transformer primary coil 32| as follows, from
Fig. 3 is a diagrammatic view of a heating ap
main line wire 3l5 through wire 33H to contact
paratus having another form of controlling sys 30 3H and from contact 330 through wire 332 to
tem for the ignition means.
the Wire 33238 leading to the coil 32| and thence
Referring to Fig. 1, the gaseous fuel burner
via wire 325 to the main line wire 3H.
300 is supplied with gaseous fuel through a pipe
The operation of this apparatus of Fig. 1 is as
or conduit 30|, the ?ow of fuel being controlled
follows: During the stand-by period when no heat
by a manually operable valve 302 having a valve
member 303 cooperable with a valve port 333.
The valve member 303 is normally urged toward
closed position by a helical coil compression
spring 303 acting on the valve stem 303. The
valve member 303 is movable to open position
by a manually operable cam member 301, which
may be pivotally secured to the valve stem and
have its cam surface bearing on the valve bonnet
3013, for example. Secured to the stem 306 and
electrically insulated therefrom, there is a switch
arm 308 having a ?exible resilient portion 303
carrying contacts 3|0, 3H insulated from each
other. The contact M0 is engageable with a
?xed contact 3|2 during movement of the valve
member 303 to closed position, the valve mem
ber 303 being permitted to have continued move
ment to its seat after engagement of these con
tacts by reason of the ?exible arm portion 303.
The contact 3|0 is connected by a lead wire M3
to one terminal of a heater coil 3“ which has
its other terminal connected by a wire 3H“ to
the main line wire 3l5 leading from a source
of current supply. The ?xed contact 3|2 is con
nected by a wire 3|6 to the other main line wire
3H so that when the contacts 3|0 and 3|2 are
engaged, then the coil 3“ will be energized. The
coil 3“ is in heat exchange relation and oper
99 is desired from the burner 300, so that the valve
member 303 is closed, the coil 3M will be heated
by reason of closure of contacts 3H), 3|2 so that
the transformer 322 will be deenergized by rea
son of the open circuit at the contacts 3l9, 320.
till When the cam 30'! is manually operated to open
the valve 303, the contact 3| i will engage the con
tact 330, thereby closing the circuit to the trans
former 322 as above described, so that ignition
sparks at the electrodes 329 will ignite the gas at
45 the burner 300. Opening of the valve member
303 breaks the circuit of heater 3M at contacts
3M, 3|2 so that the bimetal element 3|8 cools and
moves to the right thereby closing contacts 3I9,
320. When it is desired to stop further opera
50 tion of the burner 300, the cam 30'! is moved to
the position of Fig. 1 which will break the circuit
to the transformer 322 at the contacts 3| l, 330
but the circuit to the transformer primary coil
32f will be maintained through the closed warp
55 switch contacts 3| 9, 320 so that ignition sparks
at the electrodes 329 will continue and ignition
will be maintained. Therefore, if the closing
movement of the valve 303 extinguished the ?ame
at the burner 300, but the valve member 303 failed
60 to close off gas ?ow through the port 304 to the
pipe 30| so that gas flow of ignitable proportions
continued to feed to the burner 300, then the
2,869,089
3
continued ignition will ignite the gas leakage to
the burner 388. The period of continued ignition
is determined and controlled by the time required
for heating of the blade 318 by the coil 314, the
coil 314 being energized by closure of contacts
318, 312 as the valve member 363 is moved to
ward closed position. Therefore, a predetermined
time after movement of valve member 383 toward
armature will open the switch 381, 362 to break
the circuit to the heater coil 384. Ignition will be
maintained, however, until the circuitis broken
at contact 382 by cooling of the actuator 384. The
time delay before sparking at the electrodes 388
ceases is determined by the regulatable cooling
time of the actuator 384 to be of such duration
that any leakage of gas through the valve will
be ignited before sparking stops. The interval
closed position and closure of contacts 318, 312,
the blade 318 will have been heated su?iciently by 10 of delay may be of say ?fteen seconds duration
the coil 314 to move contact 319 away from con
or such other time as will assure safety in the
particular burner.
tact 328 and thereby break the circuit to the
Referring to Fig. 3, the gaseous fuel burner
transformer primary coil 321. This predeter
488 is fed with fuel from a pipe 481 containing
mined time period for breaking of circuit at con
tacts 319, 328 is sufficient to assure that ignition 15 an automatic or electrically operable valve, such
as a solenoid valve, 482 having an operating sole
will be maintained on long enough to ignite any
noid coil 483 which when energized, opens the
leakage mixture at the burner 388 following ex
valve. The coil is in the secondary circuit of a
tinguishment of the ?ame by closing movement
step-down transformer 484 having its secondary
of the valve member 383.
In Fig. 2, the burner 358 is supplied with gas 20 coil 485 connected at one end by a lead wire
486, 486“ to one terminal of the solenoid coil 483
from the pipe 351 controlled by the solenoid or
electrically operated valve 352 having the operat
which has its other terminal connected by wire
ing coil 353. .A circuit having wires 354 and 355
481, 488 to the ?xed contact member 489 of an
automatic switch 418, such as a room thermostat.
leads to the coil from a switch 356 and main line
wire 351. It will be apparent that the switch 356 25 From the bimetal blade 411 or thermostatically
can be either manually or automatically actu
operated arm and movable contact of the ther
ated. The switch 356 is connected by wire 358
mostat 418, a wire 412 leads to the other terminal
to main line wire 359. Leading from the wire
of the secondary coil 485. The transformer pri
359, there is a wire 368 which is connected to a
mary coil 413 is connected by lead wires 414,
switch arm 361 which is movable by the stem or 30 415 to the main line wires 416, 411 respectively
armature of the valve 352. Cooperable with a
of the usual domestic current supply means.
contact on the switch arm, there is a ?xed con
Connected between the lead wires 488 and 486“,
tact 362 from which a wire 363 connects to an
there is a relay coil 418 of a relay switch 419, a
electrical resistance heater 364 which is con
wire 428 connecting the wire 488 to one terminal
nected in turn to a wire 365 terminating at one 35 of the coil 418, and a wire 421 connecting the
terminal of the primary coil 366 of an ignition.
other terminal of the coil to the wire 486“, so
- transformer 381 from which a wire 318 connects
that the coil 418 is in parallel or shunt circuit
back to the line wire 351. The transformer sec
with the solenoid coil 483. The relay coil 418 acts
ondary coil 319 has its terminals connected to
when energized to attract an armature carrying
spark electrodes 388 which are positioned to ig 40 contacts 422 and 423 insulated from each other.
nite the gas mixture discharging from the burner
The contact 422 is engageable with a ?xed con
358; shunting the switch 361, 362, there is a
tact 424 upon energization of the coil 416. The
circuit for the primary transformer coil 356. A
contact 423 is normally in engagement with a
wire 381 is connected to the wire 368 and to the
?xed contact 425 and is separated therefrom to
?xed contact 382 of a thermostatic or heat motor
relay switch 383 having a bimetal blade 384 which
is connected by a wire 385 to the coil lead wire
365. The wire 381 is shown to include a resistor
381“ which represents the inherent internal re
sistance of the switch and lead wires thereto and
therefrom.
The operation of this system of Fig. 2 will in
general be clear from that of Fig. 1. The parts
are shown in the burner operating position, the
main switch 356 having been closed. Upon clo
sure of this switch. the solenoid valve coil 353 is
energized to open the valve 352. The opening
movement of the valve stem closes the switch 361,
, break contact when the coil 418 is energized.
The contact 422 is connected by a wire 426 to a
wire 426“ which is connected to the main wire
416. The fixed contact 424 is connected by wires
421, 428 to one terminal of the primary coil 423
of the ignition transformer 438. From the other
terminal of the ignition transformer, wires 431
and 432 connect to the line wire 411. The switch
contacts 423, 425 control the circuit of a heater
or resistance coil 433 of a thermostatic relay 434
having a bimetal operating blade 435 which is
?xed at one end and carries at its other movable
end, a contact member 436.
A ?xed contact
member 431 is engageable by the contact mem
ber 436 upon cooling of the bimetal blade 435
362, thereby energizing the primary coil 366 and
the heater coil 364. Sparking at the electrodes 60 and is connected by a wire 438 to the junction
388 ignites the fuel mixture. Shortly after the
of the wires 421, 428. The contact member 436
is connected by a wire 439 to the main line wire
closure of the switch 361, 362, the thermostatic
416 via the wire 426a so that the relay 434 con
actuator 384 closes against contact 382 thereby
trols the ignition transformer 438 and is in shunt
completing the circuit for the primary coil
shunting the switch 361, 362. While the closing 65 with the relay contacts 422, 424. The trans
former 438 has its secondary coil 44. connected
of the switch contacts 332 and 384 tends to short
to the spark electrodes 441, positioned to ignite
out the resistor 364 it is merely a matter of proper
the fuel mixture from the burner 488, by the
commercial design to so proportion the size of the
lead wires 442, 443. The heater coil 433 is con
resistor 364 relative to the internal resistance 381“
of the switch 383 so that sufficient heat will be 70 nected at one end by wire 444 to the wire 426'
from the main line wire 416 and is connected
generated by the resistor 364 to maintain the
at its other end by wire 445 to the relay con
switch 383 closed even when the shunt circuit is
tact 425. The movable contact 423 of this relay
established. Upon opening of the switch 356, the
switch is connected by wire 446 to the wire 432
valve 352 will close by gravity or spring force and
the downward or valve closing movement of the 75 which leads from the main line wire 411.
l
5
2,669,089 '
6
The operation of the system of Fig. 3 is as
ing of said valve, a circuit shunting said switch
follows: When the room thermostat “0 calls for
and having a normally open switch therein,
heat and closes against contact 409, the trans
thermostatic means controlling the opening and
former 404 being energized, parallel circuits will
closing of said last-named switch, an electric
be completed through the relay coil “8 and 5 heater
for said thermostatic means, and means
through the solenoid valve coil 403. These cir
operable upon opening of said valve to control
cuits will be as follows: from the transformer
the energization of said heater therebyto close
secondary coil 405 through wire “2 to and
said normally open switch, said thermostatic
through the closed switch 4" to lead wire 408
means acting to delay the opening of said nor
and thence branching through wires 4" and 420 10 mally open switch subsequent to closure of said
respectively to the coils 400 and 4|! from which
valve.
the wires 406 and 42I respectively connect to the
2. A burner safety control apparatus compris
wire 4068 which leads back to the transformer
ing a burner, a gaseous fuel controlling valve for
coil 405. Energization of solenoid coil 400 will
said burner, electric ignition means for said burn
open the valve 402 for gas flow through pipe 15 er, an electric circuit for said ignition means, a
4!“ to the burner 400. The relay coil 4l-0 will
switch in said circuit and open when said valve
close the contacts 422 and 424 and will open
is closed, means to close said switch upon opening
the contacts 423, 425 thereby making a circuit
of said valve, a circuit shunting said switch and
through the ignition transformer primary coil
having a switch therein, thermostatic means
429 and breaking the circuit through the ther
operable when heated to open said last-named
mostatic relay coil 433. The ignition circuit is
switch, an electric heater for said thermostatic
as follows: from line wires 4l6, 420“ to wire
426, through switch contacts 422, 424 and wires
421, 428 to the coil 429 and thence via wires 434,
432 to the main wire 4H. Energization of trans
former 430 will cause a spark discharge across
the electrodes 44l which are energized from the
transformer secondary coil 440 through the wires.
means, a circuit including said heater, a switch
in said last-named circuit and closed when said
valve is closed thereby to energize said heater,
and means to open said last-named switch upon
opening of said valve so that said thermostatic
means will cool and close said shunt circuit
switch.
442 and m and will thus ignite the fuel mix-‘
3. A burner safety control apparatus compris
ture discharging from the burner 400. The 30 ing a burner, a gaseous fuel controlling valve for
breaking of circuit at contacts 423, 425 will cause
said burner, electric ignition means for said burn
the coil 433 and bimetal element 435 to cool and
er, an electric circuit for said ignition means, a
result in making of circuit between contacts 436,
switch in said circuit and open when said valve
421! which provides an alternate circuit for en
is closed, means to close said switch upon opening
ergizing the ignition transformer, as follows: 35 of said valve, a circuit shunting said switch and
from line wires 4H5, 426a to the wire 439 and
having a switch therein, a bimetal blade cooper
thence through the blade or element 435 and
able with said last-named switch and ac.ing when
contacts 436, 431 and wire 422 to the wire 424
heated to open said last-named switch, an elec
which is connected to the primary coil 420, the
tric heater for said blade, a circuit including said
return circuit being from the coil 429 through
heater, a switch in said last-named circuit and
wires 43H and 432 to the main wire 441. When
closed when said valve is closed thereby to ener
the room thermostat 4“) is satisfied and breaks
circuit between blade 4H and contact 409, the
solenoid valve coil 403 will be deenergi‘zed as will
the relay coil M0. Opening of switch contacts
422, 424 will not deenergize the ignition trans
former as its circuit is maintained through the
contacts 436, 421 as above described. Accord
ingly, the sparking at the electrodes 44i will con
tinue so that if there is any appreciable leakage
at the valve 402, the escaping gas at the burner
will be ignited and any explosion hazard will
be avoided. The sparking at the electrodes 44!
will continue until the heater coil 423 warms the
bimetal element 435 sufliciently to move the con
tact 446 away from the fixed contact 431. The
time interval for breaking of contact at 436, 444
as above noted with respect to Fig. 1 may be
varied in accordance with the thermostat relay 60
structure and may be of say hall a minute
duration.
This application is a continuation in part of
gize said heater, and means to open said last
named switch upon opening of said valve so ‘that
said thermostatic means will cool and close said
shunt circuit switch.
4. A burner safety control apparatus compris
ing a burner, a gaseous fuel controlling valve for
said burner, electric ignition means for said burn
er, an electric circuit for said ignition means, a
switch in said circuit and open when said valve is
closed, means to open said valve and to close
said switch, a circuit shunting said switch and
having a switch therein, thermostatic means
operable when heated to open said last-named
switch, an electric heater for said thermostatic
means, a circuit including said heater, and a
switch in said last-named circuit and closed
when said valve is closed thereby to energize said
heater, said valve opening means acting upon
opening of said valve to open said last-named
switch so that said thermostatic means will cool
and close said shunt circuit switch.
5. A burner safety control apparatus, compris
my copending application Serial No. 486,829 ?led
ing a burner, a gaseous fuel controlling valve for
May 13, 1943, for Ignition Controlling Means, 65 said burner and having a stem, electric igni.ion
now Patent No. 2,406,185 granted August 20, 1946.
means for said burner, an electric circuit for said
Having thus described the invention, what is
ignition means, a switch in said circuit and open
desired to be secured by Letters Patent of the
when said valve is closed, said stem being cooper
United States is:
able with and acting uponfsaid switch to close
1. A burner safety control apparatus, compris 70 said switch upon opening movement of said valve,
ing a burner, a gaseous fuel controlling valve
a circuit shunting said switch and having a nor
for said burner, electric ignition means for said
mally open switch therein, thermostatic means
burner, an electric circuit for said ignition means,
controlling the opening and closing of said last
a switch in said circuit and open when said valve
named switch, an electric heater for said thermo
is closed, means to close said switch upon open- 75 Static means. and means operable upon opening
2,589,089
heater thereby to close said normally open switch,
said thermostatic means acting to delay the open
ing of said normally open switch subsequent to
closure of said valve.
8
to said burner, means controlling movement of
said valve toward open position, electric ignition
of said valve to control the energization of said
means for said burner, a circuit for said ignition
means, an ignition controlling switch in said
circuit, thermostatic means operable to actuate
said switch, a heating circuit having means for
heating said thermostatic means from a cold
condition to a heated condition, said thermostatic
means in one of said conditions acting to hold
,
6. A burner safety control apparatus, compris
ing a burner, a gaseous fuel controlling valve for
said burner, means for actuating said valve, elec
tric ignition means for said burner, an electric
circuit for said ignition means, a switch in said 10 said switch closed and being operable to open
said switch upon change from said one condition
circuit and operable to closed position by said
to the other condition, and means operable to
means upon opening of said valve, a circuit shunt
control current flow in said heating circuit so
ing said switch and having a normally open
as to change said thermostatic means from said
switch therein, a second switch operable by said
valve operating means and closed when said valve 15 one condition to said other condition upon opera
tion of said valve controlling means for valve
is closed, thermostatic means operable to actuate
closing movement, the time interval for change
said normally open- switch, an electric heater for
of condition of said thermostatic means delaying
said thermostatic means, and a circuit including
the opening of said ignition switch.
said second switch and said heater.
7. A burner safety control apparatus, compris
11. A burner safety control apparatus com
prising a burner, electric ignition means for said
ing a burner, a gaseous fuel controlling valve
burner, a circuit for said ignition means, an igni
for said burner and having a stem, means oper
tion controlling switch in said circuit, thermo
able upon said stem to open and close said valve,
static means operable to actuate said switch and
electric ignition means for said burner, an elec
tric circuit for said ignition means, a second cir 25 having relatively heated and cold. conditions, a
circuit having a heater for heating said thermo
cuit for said ignition means, a normally open
static means, a switch in said last-named circuit,
switch in said ?rst-named circuit, a normally
a valve for controlling fuel ?ow to said burner,
open switch in said second circuit and biased
means operable upon opening operation of said
- toward closed position, a bimetal blade cooper
able with said second-named switch and operable 30 valve to actuate said last-named switch to condi
tion said thermostatic means to move said igni
on cooling to close the same, an electric heater
tion controlling switch to closed position, said
for heating said blade, a circuit including said
last-named means operable upon closing opera
heater, a normally closed switch in said heater
tion of said valve to actuate said last named
circuit to maintain said heater energized and
said second-named switch open, and means oper 35 switch to condition said thermostatic means to
move said ignition controlling switch to open
able by said stem to substantially simultaneously
20
position, the time interval for change of said
open said normally closed switch and close said
?rst-named normally open switch upon opening
thermostatic means from said one to said other
condition delaying the opening of said ignition
movement of said valve.
8. A burner safety control apparatus, com 40 switch.
7
12. A burner safety control apparatus compris
prising a burner, a gaseous fuel controlling valve
ing a burner, a fuel supply controlling valve for
for said burner, electrical means to open said
said burner, means controlling opening and clos
' valve, a circuit for said means, a switch in said
ing movement of said valve, electric ignition
circuit, electric ignition means for said burner,
a circuit for said ignition means, a switch in
' means for said burner, a circuit for said ignition
said last-named circuit and closed by said elec
means, an ignition controlling switch in said cir
cuit, switch actuating means, means interrelat
ing said valve controlling means and said switch
actuating means to close said switch upon valve
opening movement and to open said switch upon
valve closing movement, a circuit shunting said
switch, a switch in said shunting circuit, thermo
static means operable on temperature change in
shunt circuit switch, said bimetal actuator upon
breaking of said heater circuit delaying the
one direction to close said last-named switch
, opening of said shunt circuit switch upon closing ,w! in and on temperature change in the opposite direc
of said valve.
tion to open said last-named switch, means to
trical means upon opening movement of said
valve, a circuit shunting said last-named switch
and having a normally open switch therein, a
bimetal actuator for said last-named switch, and
an electric heater in said second~named circuit
and operable to heat said actuator to close said
9. A burner safety control apparatus, compris
heat said thermostatic means, and means oper
ing a burner, a gaseous fuel controlling valve for
able to control said heating means to close said
said burner, electrical operating means for said
last-named switch on opening movement of said
valve, a circuit for said means, a circuit shunting 60 valve and to control said heating means to open
said operating means, a relay switch having its
said last-named switch on closing movement of
coil in said shunt circuit, a main switch operable
said valve, temperature change of said thermo
to simultaneously close said circuits, electric igni
static means in said opposite direction delaying
the opening of said last-named switch.
ignition means, said relay switch having normally 65
FRED B. AU‘BERT.
tion means for said burner, a circuit for said
open contacts in said ignition means circuit, a
circuit shunting said normally open contacts and
having a normally open switch therein, thermo
REFERENCES CITED
The following references are of record in the
static means operable when cool to close said
?le of this patent:
last-named switch, an electric heater for said 70
UNITED STATES PATENTS
thermostatic means, a circuit for said heater, and
Number
Name
Date
normally closed contacts forming part of said
1,271,822
relay switch and positioned in said heater circuit.
2,221,667
10. A burner safety control apparatus com
prising a burner, a valve for controlling fuel ?ow 75
Zam ______________ _. July 9, 1918
Betz ____________ .._ Mar. 12, 1940
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