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Патент USA US2412235

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Dec. 10, 1946.
1
T. F. VAN DENBERG ETAL
‘
2,412,235
SAFETY VALVE MECHANISM
Filed Oct. V13, 1944
2 Sheets-Sheet 1
28
.—
' INVENTORS
a2
‘
26
I.‘
THoMAS F. VAN Dansana
3y
4m: {Form OLLBY
Dec. 10, 1946.
fr. F.- vANDENBEhG ET AL
2,412,235
SAFETY VALVE ' MECHANI SM
Filed Oct.- 13,~ 1944
2 Sheets-Sheet 2
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1N VEN TORS
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‘i 2,412,235
Patent-ed Dec. 10, 1946 I‘
UNITED ‘STAT as
PATENT; orrlca I‘ A
- 2,412,235
SAFETY. VALVE MECHANISM
Thomas F. Van Denberg, Cleveland Heights, and
John Selby, Euclid, Ohio, assignors to The
Titan ‘Valve and Manufacturing v(lompany,
>Clevela‘nd, Ohio, a corporation of Ohio
Application October-'13, 1944, Serial No. 558,514
9 claims.‘ (01. 158-1171)
1]
This invention relates to safety valve mecha
2
Fig. 2 is a sectional elevation, showing the valve
nism such as is used for controlling the sup- '
mechanism-in normal or inoperative position;
ply of fuel gas to the burner 01 a hot water heat
ing device or the like. The invention is an im
ing the reset device in advance position; . ,
Fig. 3 is a similar sectional elevation, show
provement upon the valve mechanism forming
the subject matter of our prior application for
,Thermo-magnetic safety pilot mechanism, ?led '
?nal
August 19, 1944, Serial No. 550,214, to‘ which ref
Fig.
Fig. 4 is a similar view, showing the parts in .' position;
.
,
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.
,
Fig. 5 is a detail section view on the line 5-5,
erence may be. had it desirable or necessary.
3:
and
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I
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Fig. 6 is ‘a cross-section, on I the line 6—6.
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One object of the invention is to provide im 10 Fig. 2.
proved magnetic couple maintaining means for_
Referring to the drawings, the valve mecha
the control valve or device, in which the magnet,
nism is shown, for convenience of illustration and
, rather than the keeper or armature, is associated
with the movable valvemember for movement '
therewith to the maintaining position, and in
which, also, the armature or keeper is also mov
in no sense of limitation, for use in controlling the
?ow of fuel gas to the main and pilotibumers l0,
_l-i of a domestic hot water heater, which is shown
conventionally as including an outer casinglor
> able to produce or to terminate the maintaining
_jacket ‘[2 enclosing the combustion chamber I 3
in which the burners operate. and above them a
water reservoir having a chamber M. The prod
prove the thermally responsive maintaining 20 ucts of combustion may be carried away-to the
effect.
’
,
Still another object of the invention is to im
means for the controlling valve by utilizing there- V
stack pipe IS in any suitable manner, as by a
channel or_ channels it astis usual.
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for relatively movable cooperating mated keep
er and permanent magnet members together with
stationary stop means forpreventing them from
The valve mechanism forming the ‘subject matter of the present-invention is‘ of unitary form,
reaching ‘contact during a resetting operation, 25 consisting of a single hollow body or casing l'l
one of said members being bodily movable with
provided with supply and discharge chambers i8,
> reference to the stop means to approach and con
i9 adapted for connection to or communication
tact with the other member when the pilot bum
with a source of gas supply, such as the supply
er is ignited, and being bodily movable away
pipe 20 and a pipe or conduit 2i communicat
from its -mate and said stop means to release 30 ing with the main burner III, in the usual man- ‘
the maintaining means whenthe ?ame is extin- ~
ner.
guished.
Communication between the supply chamber l8
Still another object of the invention is to pro-1
and_discharge chamberiS is controlled by‘an
vide a combination valve mechanism of this kind
adjustable valve 23. Assuming that valve to be
a
including, as a part of-the same unit, a regulat-_ 35 open, gas ?ows ‘from the discharge chamber l9
. ing valve and thermostat sensitive to water tem
to themain burner pipe 2| by way of ports 24,,a
perature to maintain the same at ‘any desirable
passage 25 and a chamber 26 communicating
normal value. thermally responsive means sensi
- with said passage and‘ with pipe
21.
_
tive to the presence ,of ?ame at a burner located
remotely from the unit for permitting gas ?ow
only during the presence of ?ame, a single con
trolling valve controlling the ?ow of gas both to
the main and to the pilot burner, and'a sup
Flow from~
passage 25 to chamber 26 is controlled by a regu
lating valve 21 operated, to open and close it, by
snap action mechanism, marked generally 28 and
actuated by the relatively non~expansible rod 29
of a thermostat including expansible copper tube‘
plementary valve actuated by aresettlng device
30 which extends through a hub 3| or casing
for temporarily shutting oi! the ?ow of gas to 45 I‘! designed for attachment to the wall I2 of
the main burner during ignition oi the pilot
?ame.
. the heater casing, so that the thermostatic ele
ments, 29, 30 extend into the water and are sensi
tive to variations in temperature therein. This
I
Further objects of the invention in part are
.obvious and in part will appear more in detail
hereinafter.
_
arrangement, byautomatic operation of valve 21
50 in accordance with variations in-water tempera
.
In the drawings, which represent one suitable
embodiment oi’ the invention.v
Fig. 1 is anelevation, partly broken out and in
section illustrating the valve mechanism applied
to a hot water heating device;
ture, controls the "gas supply to, maintain the we;
'
' ter at uniform temperature. The temperature to
. be maintained may be varied by an adjustable
screw 32. The details of the thermo'stat29, 30,
55
snap action mechanism 28, valve z'l-and adjust
garages;
somewhat remote from casing ll, this so
is
made somewhat long and ?exible, from the me=
chanical standpoint. It must include at the op
erating end‘ which actuates couple member 49 a
ingdevice 32 form no part of the invention, ex
cept as the regulating control is includedin the
unitary structure, but, for example, may be or
the same form and arrangement shown in the
suitable servomotor to actuate said-member, and
patent, to Green and Bondurant, No. 2,328,642,
at-its opposite end, where it is sensitive to the
. granted September "I, 1943, for Combined safety
pilot ?ame, it must include some means capable
of producing actuation of the servomotor and
thermally responsive to-pilot ?ame. In thear
The pilot burner ll, shown more or less con- _
rangement shown the thermally responsive means
'10
ventionally, is of, course rather remote from the
pilot ‘and
control valve mechanism,
to which ref - _ ‘
4
erence may be had if desirable or necessary.
includes a bulb 50, the chamber in which com
municates by the channel‘ in a small diameter
casing ll, which is attached to the wall of the
‘casing I! usually .at a level considerably above
that of the pilot burner.
bendable copperor other tubev 5| with a cham- '
Therefore, the pilot
ber in a suitable expansible and co‘ntractible ser
burner is supplied with ‘gas by way of a small
vomotor “carried by a plug v53 screwed into the
15
diameter pipe or conduit 34 made, for example.
outer end of a chamber in the wall of easing I1
[of copper tubing, and which communicates with
and in which chamber the servomotor. 52 is lo
cated. The- servomotor, for example, may be an
the discharge chamber [9 by way of a port or
opening 35 through the wall of the casing i1,
an annular channel 36 in a cylindrical. shell 31,
ordinary Sylphonbellows. The movable abut
and ports or openings 38 opening through said 20 ment at the end of said bellows is connected by a
stem '54 to couple member 49; As is usual, the
shell into the discharge chamber l?'at a point
closed or sealed system,‘ including the‘ chambers
spaced longitudinally from the main b'urner ports
in bulb 50 and bellows 52 and the channel con
24 and between ports 24 and valve 23.
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necting them, contains an appropriate quantity
Means‘ is provided for resetting the controlling
of a ?uid expanslble and contractible by varia- \
valve 23 to open position, by: manual operation, as
" :tions in temperature.
well as means for releasably maintaining said
nited.
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a
The parts are so designed, constructed and ar
' ranged that when the parts are cold, in the sense
that neither burner is ignited, theservomotor is I
valve" in open position when the pilot ?ame is ig
_
The reset means includes a manually operable
button or head 39 on the outer end of a tube,“
contracted and couple member‘ 49 lies entirely
within the recess 48, being spaced vifrom the iace
provided at its inner end with an operable piston- _ ' ‘oi the stop ring 41 by a small distance, such as
form supplementary valve 4| movable longitudi
nally'vinthe cylindrical'adischarge chamber l9.
thirty thousandths of an inch.
The device operates as follows: Let us assume
‘ Said valve‘is normally biased to move to its in-v
operative position, shown in full lines Fig. 2, by a
that the valve mechanism is installed upon a do
mestic water heater in the manner illustrated in
Fig. 1, with the valve mechanism attached to the
compression spring 42 surrounding tube 40 and
housed within'the chamber of a plug 43 screwed
into the casing and integral with the sleeve 31
before referred to, the inner end of which sleeve
side wall of the casing,‘ the thermostatic elements _
29, 30 extending through the wall thereof into
40 the water space, the main burner supply pipe 2!
provides the seat for valve 23. In the .inopera-.
connecting the unit to the main burner, the small
tive position of the supplementary valve the in
‘ copper tube 34 providing gas supply for the pilot
ner-surface’of 'buttbn 39 is spaced from the head
62 connected to
44 'of :the stem “which supports valve 23, so ‘
burner 33, and the servomotor
bulb 52 by the pipe 5!.
‘
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.
that it is-necessary' to push the button'in and take
It may be further assumed that the valve parts
up the lost motion between said» head and the 45 occupy the position shown in Fig. 2. ‘That is to “
valve stem, before the"valve,23 begins to move.
say, the water temperature is above the critical
‘When that lost motion has been taken up the sup
value, so that the thermostatic tube 39 is ex
plementary valve .occuples'a position beyond all
tended, ‘andbecause there is no demand iorheat,
of the ports 24 communicating with the passage
regulating snap valve 2‘! is closed and .main
25 and shutting oil the flow of gas to the main 50 burner 50 is out. But the pilot burner‘ is alsovout,
burner, but leaving'port 38 open, so that ?ow
as the result of an assumed'back draft or other
to the pilot burner is not shut o?. Further ad
incident. It is desired to set the system into
vance motion of the re'setbutton moves valve 28
operation, whichis accomplished as follows:
from its seat to open position, the motion con
Button 39 is first pressed in, the parts moving
tinuing until- one of the members 4% of a perma
to the positions shown in Fig. 3. When the lost
nent magnet couple engages a ?xed stop or shoul
motion between said button and valve stem‘ 4!
der,- carried ‘by the casing I1, and shown as an
annular projection 41 surrounding a cylindrical
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is taken up, valve 4! has moved beyond'the ports
‘ 24, ?ow to which from ‘chamber as is thereby out
recess 48 in the casing wall. In said recess is
o?. Further inward motion oi’ said button ad
enclosed the other member 49 of said permanent 60 vances
the valve 23 against the e?ect of its re
magnet couple.
.
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The‘ two members of the permanent magnet ‘
turning or biasing compression spring 55 until the
magnet es engages the stop 41 on the casing wall.
couple-are of such form as to have a strong tend~
which is made, ofv course, of non-magnetic ma
ency to adhere when they are in contact. In
terial such as brass or copper. In this position
other words, ‘one of them (either one) is a per 65 or the parts ports”, leading to the pilot burner‘
manent magnet and, the other (either one) is an
armature or keeperfor the permanent magnet.
In the. drawings‘. member 46 is the permanent
supply conduit, of course are still open. Since
there is ‘no ?ame existing, the ?uid within the
sealed bulb system is contracted and couple mem
magnet and member 48 is ‘the keeper. although '
the reverse arrangement may be employed. .
70 ber 48 ‘is se'parated‘from its mate by a distance
such that the strength of the magnetic ?ux is
' Member 49 of the couple, i. e., the one lying in
_ the recess 48, is operatively associated with or -
connected to thermally'responsive means sensi
tive to the presence or absence of ?ame at the
relatively weak. Therefore, it‘ neither burner is
ignited and the ?nger is taken oil! from thebut
ton 39, the parts return to their initial positions .
pilot burner. Fln'ther, since the pilot burner is 75 and nothing occurs. However, if a lighted match
2,412,235
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Fig. 5. This consists of a generally cylindrical
body member 80 suitably secured on the- reduced
is applied to the pilot ?ame it will ignite, but the
‘ . main burnerdoes not ignite because the ?ow oi’
end portion licjof the valve stem 45, and housed
within two cup-shaped members .62, 63 made ‘0!
magnetic. material, the edges 01' the skirts of said
gas to it is temporarily shut of! by the supple
mentary valve 4|. Play of the pilot flame upon
bulb it expands the'tluid therein'and causes the
movable abutment or the'servomotor 52 to-move
over, advancing couple member" in the recess
48 until it contacts with its mate I‘. When the;
cups being faced off in the same plane.
The ' '
' body member 80 is magnetized so that the lilies
oi.’ flux, from N to S, span the gap between‘ the
skirts oi.’ the two members 62, 63. Consequently
" couple members are in contact the strength of
the magnetic flux between them, causing them 10 the keeper or armature ‘49, when in contact with
the, magnet, includes two sets of lines of force.
to adhere, is considerably _ greater than the v
one on each side of the central axis, instead oi.’ a
strength of the valve biasing spring 55. If the
?nger is now removed from button 39, valve 23
single set, as is usual with the ordinary~borse
return to their original positions. This reestab
at on.
remains in its open position, where it is relea's- - shoe type of magnet. However, the special form
ably held by the effect of the two couple mem 15 of magnet, while of considerable value in the
present construction, is not essential for its opera
bers, and sleeve 40 and supplementary valve ll
' lishes communication from the discharge cham
ber I‘! by way of port 24 to the main burner, but
subject however to the operation of the regulat 20
ing valve 21. That is to say,‘ the main burner _
channel is open when the water temperature is
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other advantages or the invention will be ap
parent to those skilled in the art.
What we claim‘ is:
‘
.
1. Controlling mechanism of the character -de
scribed, comprising movable control means hav
ing idle and operating positions, a magnet couple
low and imposes upon the thermostatic elements
including cooperating mated permanent magnet .
20, 30 a demand for heat, causing them to open
valve 21. But it the water temperature is ‘high 25 and keeper members, both of which are movable
and one of which is operatively associated with
valve 21 will. be closed, in the usual manner.
said ‘control means, means biasing said- control
All parts remain in the operative or valve
. means toward one of its positions, reset means for
. opened position so long as the thermally ‘sensi
advancing said control means against'said bias
tive‘ device is‘ affected by the pilot ?ame, but if
toward its other position and its associated couple
the pilot ?ame is extinguished for. any reason, 30 member
to a position neighboring itsmate, stop '
such as on ‘account of a failure in the gas sup
means for limiting advance motion- of said asso
ply, the thermally sensitive device 50 cools and
ciated couple member, and condition responsive‘
the servomotor contracts, its end abutment mov
means for adjusting the other couple member to
ing to the'right in Fight-and carrying with it
ward or from its mate, to produce contact or sep
35
the magnet couple member attached to it, which
aration between‘ the couple members with.conse-'
in the form shown .is the keepermember?.
Movement to the right .of the magnet 46, how
ever, is prevented by the stop shoulder or abut
ment on the casing wall. Consequently, cooling
or the thermally sensitive device causes opera
tion of the two couple members by bodily move
' quent holding or release of the associated control .
means.
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2. Controlling mechanism 02 the character de
40 scribed, ‘comprising a movable control device hav- ~
ing idle and operating positions, a magnet couple
including cooperating mated permanent magnet
ment oi’ one thereof ' (member 49) relative to the
and keeper members, both of which are movable
other member ll. Under the influence of itsbi
and one of which is operatively associated with .
asing spring 42 the control valve promptly‘snaps
said control device, means for advancing said one
to its inoperative or closed position, shutting oi‘! ' member of the couple and its'associated control _'
the ?ow of all gas through the valve device, both
device, stop means limiting 'motion 01 the, ad
to the pilot burner and to the main burner. - The
vanced couple member to a position neighboring
parts are now. in their original normal or inop
it's mate,-and means for advancing the second‘
erative positions, requiring a complete resetting 50 couple member into contact ‘with the ?rst.
operation, when gas ?ow is resumed, as before.
3. vIn combination, a hollow valve casing pro
Thus, the system described combines in one unit
vided with gas supply and'discharge chambers, a
not only a regulating valve, sensitive- to water
valve controlling the flow of gas from the supply
temperature ‘and always tending to maintain that
_ chamber-‘tothe discharge chamber, means blas
temperature uniform, but also a single valve ‘for
ing said valve to move toward closed position, re¢
controlling the supply of gas to both the main and 55 set means for advancingsaid valve to open posi
pilot burners. That control valve is sensitive. tion, a magnet couple including cooperating rela
thermally to ‘the presence or absence of ?ame
tively movable mated permanent magnet and
playing upon the controlbulb 50, and therefore
keeper members, both of which are movable and
constitutes a safety valve which‘ fully shuts off
one of‘ which is operatively associated with the
the ?ow 01’ any gas through the valve mechanism, 60 valve to move therewith, thermally ‘responsive '
if the pilot flame goes out. In addition, the valve
means affected by the heat produced by gas ?ow
mechanism includes a supplementary valve serv
ing past said valve ‘for adjusting the other mem,ing as a temporary shut-off valve for the main
ber towardv and from its mate, and stationary
burner supply, but‘ it automatically opens .and g5 abutment means in the path of movement of said
remains open when the pi lot burner is‘ ignited
one member for limiting its advance motion to
and the reset device is released, so that it does
thereby prevent or permit contact between.said
away'entirely with any necessity for the usual
members dependent upon the‘ temperature to
manually operated control valve for the main ‘which said thermally responsive means is sub
burner supply.
'
The permanent magnet of the magnet couple
may be of any suitable form, but preferably is’
of a form producinghigh magnetic flux for a
given size and weight of metal. An Alnico mag
70 jected. '
4. Valve mechanism of the character described
comprising a hollow casing provided with gas sup
ply and discharge chambers, a movable valve con
the flow of gas between said chambers,
net is suitable for the purpose. The-drawings 75 trolling
said valve being biased toward closed position, I
show a 'special'magnet illustrated in detail in
'
aeiaast?
i.
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di-b
withthesecond of‘ s'd-couple members and
rection, a magnet. couple including cooperating
relatively movable mated permanent magnet and
adapted when heated to adjust said second cou~_
means for advancing said valve in the ope
ple member into contact with its mate, to thereby _
,releasablymaintaln the valve open.
keeper members, both of which are movable, one
of said members being operatively associated with 5 ~ 7. Fuel ?ow controlling mechanism, comprising i
said valve to move therewith, a wall or the casing ‘
a chambered valve casing, a control valve therein '
being provided with a recess housing the second
having open and closed positions,- means biasing
'member and with a shoulder located anterior to i
said recess and lying in the path Pf movement of ‘
said valve toward closedposition, reset means for
advancing said valve toward open position, stop
10 means limiting such advance, thermally respon
said ?rst member and adapted to limit the move
' ment thereof, an actuator operatively associated
sive means-a?ected by the heat produced byiuel
with said second member, and an operating device
operatively associated with said servomotor and
located to be ‘affected by-the heat ‘produced by
passing said valve, and a magnet couple including
cooperating mated permanent magnet and
keeper members, both of which are movableand
fuel ?owing past said valve, said second member, 15 one of which is'movable with the valve and the ,
other of which is operatively associated with said
, said actuator, and said operating device being so
, constructed and arranged that when said operat
ing device is at one temperature the second mem
‘ berlies within said recess‘and spaced from said
thermally responsive means and when said means
' is-heated occupies a'position in which it engages
its mate and thereby releasably' maintains the
20 valve open, whereby upon cooling of said ther-,
mally responsive means the couple memberasso
'ciated therewith is withdrawn and said stop a
shoulder and out of contact with the ?rst ‘mem
' - ber, and when the valve is advanced, and the op
erating device [is sublectedto another temper:
ture, the actuator moves the second couple m
means ‘serves as an abutment compelling separa
-
her in said recess to a position in contact with the
tion of the mated couple members and release of
?rst couple member, thereby to maintain the‘ 25 the valve for biased movement to closed position.
‘
valve
open.
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8. Controlling mechanism of the character de- -
.
5. Valve mechanism of_ the character described,
‘ scribed, comprising a movable control device hav
comprising a hollow casing provided with gas "sup
ply and discharge chambers, a valve movable back
ing idle and operating positions, a magnet cou
a magnet couple for controlling said valve, said ‘7
ated with said control device to move therewith,
means for advancing said one member oi the cou
ple and its associated control device to a position
ple including cooperating mated permanent mag
and forth between idle and operative positions for 30 net and keeper members, both of which‘ are
controlling the ?ow of gas between said chambers,
movable and one of which is operatively associ
couple including cooperating relatively movable
mated permanent magnet and keeper members,
both of which are movable and one of which is 35 in which the advanced couple member neighbors
operatively associatedwith the valve, reset means
‘its mate‘, and variable condition responsive means
for advancingsald one member and said valve
operatively associated with. the second couple
from inoperative to operative position, thermally
\ member to actuate the same and adaptedupon
variation of the condition in one direction beyond
a given value to advance the, second couple mem
responsive means affected by the heat produced
by fuel ?owing past the valve, the other couple 49
member being operatively associated with said,
thermally responsive means and adapted to be ,
moved thereby to either of two positions relative
.to its mate, one position in contact therewith and
the other position separated thererrom, according 45
ber to a position in which it may contact with the
?rst and upon variation of the condition in the
sponsive means is subjected, and stationary abut
opposite direction beyond theg-iven value to re
tract the second couple member and bodily sepa
rate it from its mate.
9. Controlling mechanism of the character de
scribed, comprising a movable vcontrol means hav=
ment means lying in the path of movement of
said one couple member to limit its advance and
ing idle and operating positions, a magnet couple '
including cooperating mated‘permanent magnet -
I to' the temperature to which the thermally re
thereby prevent or permit actual contact between o and keeperv members, both of which are movable
said couple members upon operation of the reset
and one of which is operatively associated with
means dependent upon the temperature to which
said control means, means biasing said control
said thermally responsive means is subjected.
means toward one of its positions, reset means for
6. Fuel ?ow controlling mechanism, compris
advancing said‘ control means against said bias _
ing a chambered valve ‘casing, avcontrol‘ valve
toward its other position, and its associated cou
therein having open and closed positions, means
ple member toward a position neighboring its
biasing said valve toward closed position, reset
mate, stop means for limiting advance motion of
means for advancing said valve toward open po
said associated couple member, and condition re“
sition, stop means limiting such advance, a mag
sponsive means for adjusting the other couple
net couple including cooperating mated perma
member toward or from its mate, saidcondition
nent' magnet and keeper members, both of which
responsive means being of such form and .so reare movable and one of which is movable with
lated to the couple‘ member which it operates as
the valve and the other of which normally occu
to prevent contact between said couple members
pies a position spaced from its mate when the‘
at low temperature and to produce holding con
valve has been advanced to its limit as deter
mined by said stop means, and thermally respon
sive means ail'ected by the heat produced by fuel
passing said valve and operatively associated
-
tact between them when the temperature is
“5
raised.
,
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‘
THOMAS F. VAN DENBERG. ’
JOHN SELBY.
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