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Патент USA US2269016

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Jan. s, 1942.
w; H.' @ME
2,269,016
MAGNETIC VALVE
Filed Nov. 13, 1939
áfhwmtor
Willis H. Gun
‘Ottomgg
Patented Jaa 6, 1942Y
2,269,016A
UNITED STATES PATENT ori-‘ICE
2,269,016 .
MAGNETIC VALVE
Willis H. Gille, St. Paul, Minn., assigner to Minne
apolis-Honeywell Regulator Company, Minne
apolis, Minn.,l a corporation of Delaware
Application November 13, 1939, Serial No. 304,093
10 Claims. (Ci. 236-75)
My invention relates to improvements in auto
upon adisc 34 having a flanged opening through
matic control and operation of electric valves and
has more particularly as its object to provide
means embodied in magnetic valves to prevent
them from sticking in open position due to re
-siclual magnetism continuing to attract the core
or armature after the valve has been deen'
ergized.
t
'
.
its central portion, the disc 34>serving to space
or separate the coils I6 and 35. As will be de
scribed later in the specification, the coil I6 is
a lift'coil for- purposes of opening thevalve
and the coil 35 is a drop-out coil the purpose
of which is to cause positive closure ofthe valve
to insure against sticking of the valve in open
Another object of my invention is to providej
position.
a magnetic valve having a lift winding and 10
Extending within the coils is a sleeve I9 of
a drop-out -winding in combination with a con
suitable non-magneticfmaterial such as brass.
trol arrangement whereby the drop-out coil is
Secured within the upper end of the sleeve i9
shunted for opening the valve.
is a sleeve Ztl-which is also of non-magnetic ma
-Another' object is to provide a magnetic valve
terial preferably having good electrical conduc
having series connected lift and drop-out Wind 15 tivity such as copper. The sleeve ,20 is secured
ings of such- relative magnetic effect that the
to the sleeve I3 by any suitable means to insure
valve is opened'by the lift winding whenever
a fluid tight joint. Extending through the sleeve
the drop-out winding is shunted and the valve
2li is a pin 2| which is of magnetic material.
is closed whenever the shunt is. interrupted to
This pin terminates in a head 22 which head
cause current to flow in series' through the coils. 20 is provided with a conical extremity '23.
Another object is to provide a magnetic valve
A core or plunger of magnetic material 24 is
having lift and drop-out windings connected in
loosely mounted within the sleeve I9 and is de
series and afmanual opening device for power . signed to be actuated in response toenergization
failure operation including recycling contacts for
and deenergization of the coils I6 and 35 as will
shunting the drop-out winding, the manual open 25 be presently described. This core is connected to
ing device being of a type which latches the
the valve’ stem I5 through a lost motion con
valve in almost open position, the. valve open
nection. This connection is formed by providing
ing fully upon resumption of power, releasing
the core 24 with an elongated cylindrical passagev
the manual device and energizing the two wind
25 in which is slidably located a cylindrical head
ings in series to close the valve.
30 26 of valve. stem I5. The lower end of the
_ Further objects of the invention will become
passage 25 -is closed by means of a plug 2l.
apparent from' the following detailed description
Mounted upon, this plug is a spring 28, having
and annexed drawing.
__
\
its opposite _end seated against the head 26. If
The single ñgure of the drawing is a cross
the valve I4 is stuck to its seat when the solenoid
sectional view of my improved valve showing 35 is energized, the spring 28 permits the core 24
diagrammatically the electrical connections for
` automatic control thereof.
Referring tol the drawing, a valve body is des
ignated by _the reference numeral I0 and com
prises an inlet connection II and an outlet con
nection I2. The valve body is provided with,
_the usual transverse partition I3 which is aper
tured to provide a valve seat therein. Coop
erating with said valve seat- is a valve |_4 which
is rigidly secured to a valve stem I5 by lsuitable
to move and gain momentum so that a consid
erable amount of kinetic'energy is available to
break the valve loose when the spring is finally
taken up. It should also be noted that, since
40 the spring 28 holds the head 26 against the core
24 while the valve is open, a hammer action is
obtained which insures the firm seating of the
valve when it is closed.A
_ The upper e'nd ofthe solenoid core 24 is pro
vided with a recess having two conical surfaces
28 and 38. The conical surface 30 is adapted to
Mounted on the valve body III is a solenoid valve
engage the conical surface 23 of pin 2I to limit
,actuating mechanism.
the upward movement of the core. The conical
The solenoid actuating mechanism comprises
surface 23 is adapted to cooperate with a similar
coils I6 and 35. The coil 35 is located on a 50 conical 'surface 3| on member 20 inv such a`
ilanged disc Il of magnetic material, which disc
manner that the core is’ guided into engagement
in turn is located upon a relatively thick cir
with stop 23. In order tovguard against any
means such as by being threaded thereto.
cular plate I8. The latter plate I8 is supported
dash-'pot action a transverse passage 43 is pro
by the valve housing I0 and it is secured thereto
vided in the core 24 which passage is in com
in fluid tight relation. The coll I8 is mounted 58 munication with a recess in the upper end of the
2
2,269,016
.core. This is necessary because of the pres
ence of the fluid within the space between the
core and the sleeve 20. In this connection, at
tention is called to the fact that thel core is
the patent to Cyr mentioned above, the patents
of Willis H. Gille No. 2,114,961 -and No. 2,181,423.
' Numeral 49 designates a terminal box formed
' as a part of the upper structure of the valve and
loosely mounted within the sleeve I9 so as to
which houses a portion ofa manual operating
permit fluid to flow around the same.
means for the valve. The terminal box 49 is
shown partly broken away. The manual operat
This is
of considerable importance inasmuch as it serves
to cool the windings of the coils I6 and 35 to -
ing means includes a shaft 50 journalled in a stud
prevent excessive heating thereof during pro
5I which'is threaded into the valve body I0.
longed operation.
Connected to the shaft 50 is a cylindrical mem
,
On topïof the coil I6 there is located a disc 32
of insulating material. Secured to said disc is a
flanged disc 33 of _magnetic material. Also lo
cated on said insulating plate is a second plate 31
of magnetic material. ` A circular armature 4I is
secured to a switch blade 42 which switch blade
carries an electrical contact 36 adapted to coop
erate with a stationary contact 43 located upon
the- insulating disc 32. The armature 4| serves
to complete the magnetic path between magnetic
members 33 and 31 upon energization of the coil
ber 52 which has secured at its upper end a l
knurled knob 53 designed to be manually rotated
by the operator. The shaft 50 and the cylindri
cal member 52 are secured together by means of
a rivet 54, although it is ’to be understood that
any other suitable securing means can b_e em
, ployed and if desired these two members can
be integrally formed. 'I'he cylindrical member.
52 is enlarged at its lower extremity 55. This
uenlarged portion 55 is provided with an opening
|6. y The plate 31 has three inwardly extending
56 on its underside into which extends one ter
‘minal of a coil spring 51.. The other end of the
projections (not shown) adjacent which the
armature 4| will be attracted most strongly. This
portion of stud 5I. The spring 51 is normally
will result in a three-point holding action be
spring extends into an opening 58 in the upper '
tween each plate and the armaturewhich will
lessen the danger of the armature being held un
tensioned so as to tend to move member l52 and
the attached shaft 50 upwardly and at the same
time to rotate it in a clockwise direction looking
evenly so as to cause chattering or Vibration
downwardly. As is apparent from the drawing
thereof. The details of construction of the mag
part of the present invention. The details of
construction of these plates are described more
the shaft 50 is provided at its lower end with 'a
conical shoulder 59 and by reason of the tend
-ency of the spring 51 to urge shaft 56 upwardly,
this conical head is yieldably urged into engage
fully in the patent to Cyr 2,155,358.
' ment with the edge of the opening in the under
netic plates 33 and 31 however,v do not form a «
`
1
By reason of the resilience of switch blade 42
to which the armature 4| is attached, the latter
member is held in the position indicated in the
drawing when the coil I6 is deenergized.
The disc |6 is provided with a cylindrical recess l
in the interior thereof in which is secured a re
side of stud 5|.
The shaft 50 has attached at its lower end an
arm 6I. Secured-to the arm 6I is a downwardly
extending pin 62. This pin 62 is adapted to co
operate with a curved surface 63 of a core actu
ating member 64. The core actuating member 64
silient spring disc 44. This spring disc is secured
is pivotally mounted on a pin 65 through a pair
in place by'means of a plurality of rings 45. It
will be noted that the inner edge of spring 4_4 is
of ears 66 as shown. The member 64 is provided
turned upwardly. This upwardly turned portion
at one end with‘a'downwardly extending portion
which terminates- in a fork 61, the fork straddling
is designed to cooperate with a conical shoulder f the valve stem and being vadapted upon turning
, of member 64 around pivot 65 in a counter-clock
46 at the lower end of the core 24.
It will be noted that' two possible magnetic
wise direction to engage the lower end of the core
24. The other end of member 64 consists of a
~ paths are provided for the flow of ñux upon „en
ergization of the coil I6. One of these paths is
flat strip which is normally'horizontally disposed
I ' through the disc |1, the casing 41 which is of
v and which terminates in the portion 68 normally
magnetic material; the plate 31, the armature 4 I,
resting against the end of shaft 56. With the
~ the plate 33 and the core 24. The other of these
parts in their normal position the arm 6| is in a
' position where further rotation of shaft 50 in a,
counter-clockwise-~direction causes pin 62 to ride
on thè curved surface 63. When it is desired to
paths is through disc I1, casing 41, plate 31',
armature 4I, pin 2| and the core 24. Flux ñow
ing through the ñrst mentioned of these two
-manually operate 'the valve, for instance when
paths is not shaded while the flux flowing through
the second mentioned of these two paths is r there is no electrical power available_the shaft
50vis rotated in a counter-clockwise direction by
-shaded by reason of the effect of the non-mag
means of the knurled knob 53 so that the pin\62
netic conducting sleeve 20 which acts as a shad
is caused to engage the curved surface 63 and
ing ring.l The result is that the iiux flowing
through these two paths is displaced approxi 60 to tilt the member 64 about the pivot 65. 'I'his
causes the core 24 to be moved upwardly and the
mately 90°. This produces a much _smoother
valve to be opened. In this position the pin 62 is
action of both the core and the armature 4| and
engaging the fiat portion of strap 64, and by rea
eliminates much of the vibration which is usually
son of the-weight of the core 24 restinggon the
present if the device is operated by alternating
65 fork 61 the shaft 50 is held in that position
against the action of spring 51, which as previ
The spring disc 44 by reason of such engage
ously stated, tends to rotate the shaft in a clock
ment of its inner turned edge with the shoulder
wise direction. The' tendency of the weight of
46 upon energization of the coil I6 serves further
the core to hold the shaft 5_0 in position is in
`to center the core within the sleeve I9 and at
creased by reason of the fact that in order for
the same time to yieldably urge the core down
wardly so that upon deenergization of the coil
the shaft to be rotated back pin 62 must travel
current.
'
»
I6 the spring disc functions as a means for re
turning the core to closed position of the valve. f
over a circular path a portion of which is closer
to pivot 65 than the position occupied by pin 62 ~
when the valve has been manually opened. Since
of this portion of my valve reference is made to 75 the pin travels through a horizontal path it is ac
For a more complete description and operation
2,269,016
Y
3
cordingly necessary for the pin to press down the
coil I8 the magnetic eilect of coil I6 only becomes
left hand portion of lever 84 and accordingly
appreciable when the coil 85 is shunted out of
raise the core `Jstill Iurther in order toázraverse
the circuit and thus when I speak of energizing
this circular path. The effect is that the pin is
the coil I6 for opening the valve I refer to com
frictionally held ,at the bottom of an inclined
pletion of the circuit therethrough which does
surface over which it must travel to return to
the normal position.
not include the coil 35.
.
Referring 'to the drawing, numeral 85 desig
While the rotation of shaft 50 causes the core
24 to be' raised sufficiently to move the valve to
open position the core is not raised as far as it is
by reason of energization of coil I8. Accordingly
as coil I6V is energized at the time that the shaft
À nates a thermostat of conventional type having
electrical connections whereby the operation of
the valve is normally automatically controlled.
'I'he thermostat 85 comprises a bimetallic element
86 to which are attached contact arms 81 and 83
engageable with ñxed electrical contacts 89 and
90, respectively. Blade 81 and contact 89 are less
widely 'spaced than blade 88 and contact 90 so
that upon movement of blade 81 in the direction
of contact 89 engagement will be effected before
the engagement of the blade 88 and contact 90.
'I‘he blades 81 and 88 move towards their respec
tive contacts in response to a drop in temperature
and blade 88 engages its respective contact at a
‘ 50 is manually moved or if itis subsequently en
ergized the frictional engagement of member 54 j
with pin 82 will not be present and consequently
the spring 51 will be effective to rotate shaft 50
to a position it is in when the valve is closed in
zwhich position the member 84 in no way inter
feres with the normal function of the valve.
Secured to the terminal box 49 are terminals
14 and 16. Secured to the terminal 14 within
the terminal box 49 is a contact carrying arm 11.
Secured to the terminal 18 also within the ter
minal box 49 is a resilient switch blade 18 which
carries contact 19 adapted to be> moved into en
gagement with a contact.“ by the contact car
rying arm 11. The blade 18 is resilient and by
temperature which may be 1° or 2° lower for
example than the temperature at which blade 88
I
engages contact 89.
.A step-down transformer 92 supplies power for
lthe operation of the valve. This transformer
comprises a line voltage primary 93 and a low
reason of such resiliency tends to move in a di
rection such as to cause engagement of contacts
voltage secondary 94. The primary 93 is con
nected to line conductors 95 and 96.
19 and 80. , When the valve actuating member is
The valve may be employed to regulate the
flow of gas or other fuel to a fluid fuel burner
to heat a room or other `space. In such case the
in its normal position this tendency of blade 18
to etl'ect the engagement of the contacts 19 and
80 is resisted by a stud 82 secured to the member
52 and having attached thereto a circular disc
83 which bears against the switch blade 18. Upon
rotation of member 52 to open the valve manual
ly disc 83 is rotatedA away from the switch bladeV
thermostat 85 is located in the space to be heated.
As shown in the drawing the thermostat is in
satisfied position, that is the position which it
assumes when the temperature of the room is
‘I8 permitting the same to cause engagement of '
above the desired value. Under these conditions
the valve is closed and the coils I5 and 35 are
contacts 19 and 80.
energized through th'e following circuit: from
As pointed out above, the coil I6 serves as a lift
or opening coil and the coil 35 acts as a` drop out
coil toinsure closure of the valve when itis de
secondary 94 through wire |00, wire |0I, wire
|02, coil 35, wire I 03, wire |04, coil I6 and wire
|05 back to secondary 94. Upo'n the temperature
Afalling the bimetallic element 80 will cause bladel
sired that it should close.- As will be\ presently
pointed out, when the electrical connections are
81 to move to the left into engagement with con
traced coils I6 and 35 are normally connected in
series with a source of power when the valve is
in closed position. The combined resistance of
the two coils is such that when they are in series
there is only a very small and negligible con
sumption of power. 'I'he current flow when the
two coils _are in series is of course very low._ The
coil 85 however has a greater number of turns of
wire than the coil I4 has and the wire of coil 35
has greater resistance> than that of coil I8. 'I‘hus
when the two coils are energized in sex-les coil 35
has a greater number of ampere turns than does
coil I8 and as a result themagnetic effect of coil
35 preponderates over that r'of coil I8. Thus
whenever the valve is in a closed position the coil
tact "89. The engagement of these elements how
ever does not establish any circuit but if the
A temperature continues to fall blade 88 will engage
contact 90 whereby the following circuit is com
pleted shunting the coil 35 and connecting coil
I5 directly across the source of power‘. from sec
ondary 94 through wire |00, wire |0I, wire |85,
contact 89, blades 81 and 88 of thermostat 85,
contact 90, wire |01, wire |08, wire |09, wire |84,
coil I8 and wire |05 >back to secondary 94. This
circuit will, as pointed out above, increase the
magnetic effect of coil I6 to such an extent that
almost immediately the armature 4| will be drawn
down in the direction of engagement with mag- `
35 tends to maintain itclosed, the magnetic cen- '
ter of the core 24 being in such a position with
respect to the field of coil 35 that the field of coil
35 will `normally urge the core 24 downwardly.
'I‘he path of iiux of the coil 35 as can be seen is
through the disc I1, casing 41, disc 34, and core
24.
'
.
In order to ,open the valve the electrical con
nections are changed so as to shunt the coil 35
and connect the coil I8 directly across the power
source. By thus removing the resistance of coil
35 from the circuit through the coil I8 there is a )7
considerably greater flow of current through thev
netic members 33 and 31 and causing the switch
blade 42 to‘bring contact 35 into engagement
with contact 43. Upon this taking place the fol
lowing holding circuit for coil I6 is established:
from secondary 94 through wire |00, wire III,
wire |06, contact 89, blade 81, bimetallic element
85, wire IIO, contacts 43 and 36, blade 42, wire
|||, wire |09, wire |04, coil I6, and Wire |05 back
to secondary 94. It will be noted that this hold
ing circuit 1s independent of the engagement of
blade 88 and contact 9u so that 1f the temperature
should rise very shghtly so as to cause disen
coil I8 so as to4 substantially increase its mag
gagement of blade 88 and contact 90, the solenoid
coil I5 would not be deenergized because of the
'netic eilect. While it is to be seen that there is
continuance of the maintaining circuit. Com
valways rat least a small current flowing through-u pletion of the circuits just described shunting the
4
2,269,016
coil 35 of ‘course causesthe magnetic effect of
coil 35 to be terminated.
Upon the energization of coil I6, core 24 will `
be moved upwardly and will cause the spring 28
'energizing circuitfor coil I6 which does not ex
tend through the coil 35, that is a shunt circuit
for coil‘35. This circuit is as follows: from sec
ondary 94 through wire I88,wire I I3,blade'I8,con-
to be compressed between the plug 2l and the 5 tacts 'I9 and 80, contact arm TI, wire I I4, wire I 08,
head 28 of the valve stem I5. After a short period
wire I09,wire I04,coil I5,and wire Iûâback to sec
of time, this action will raise the valve from its
ondary 94. Since as previously stated the valve
seat.` Due to the fact that the core is» allowed to
has been opened when there is no power avail
travel a considerable distance before the' spring
28 is compressed enough to cause movement of
the valve stem, the kinetic energy of the moving
core will be effective to move the valve from its
seat in the event it is stuck thereto. 'I'he core 24
will continue to move upwardly until the conical
able, this circuit will not be eñ‘ective to energize
coil I6 until the power is restored. As soon as
power returns however, coil I6 will be energized
causing core 24 to be lifted to its uppermost po
sition and as previously explained pin 62 will be
released' to permit the shaft 50 to rotate to its
surface 30 engages'the head of the pin 2|. In
original position. As soon as the manual op
this position of the core the shoulder» 46 will
erator is thus released contacts 'I9 and 80 will be
engage the inturned edge of spring disc 44 in
again separated and the circuit last described
such a manner that the spring 44 will exert a
through the coil I6 will be interrupted, vthat is,
slight tension on the core tending to pull it away
the shunt circuit will be interrupted and the coils
from engagement with surface 23. As long as 20 will again be energized in series. ‘ This will cause
the coil I6 is energized this tendency is resisted
immediate closurev of the valve in the manner
by the holding action of the core but as previous-_ i
previously described. In this position the parts
ly indicated is eiîective to cause downward move
are as shown in the drawing and the manual op
ment of the core upon deenergization of the coil
erator 'is in no way interfering with the control `
I6. As previously indicated, the flux which is
of the coils. If at the time the power is restored
eiïective on the core ñows through twopaths, 25 the temperature is such that blades 81 and 88
one of which is shaded and the-other of which
' are in engagement. with contacts 89 and 90, coil
is-not. In this manner, a more uniform holding
. I6 will remain energized through the circuits al
action isA secured and chattering is avoided.
ready described and the valve will remain open.
When the temperature rises suñiciently so that` 30 Thus it will be seen. that no matter what posi
blades 8l and 88 disengage from contacts 89
tion the thermostat is in when power returns, if
and 98, the coil I6 will be deenergized, that is',
the valve has been manually opened the parts
the shunt circuit around coil 35 will be inter
will immediately return to position for automatic
rupted and due to the combined effects of gravity,
control.
the spring disc 44 and the magnetic effect of coil 35 ,From the foregoing it will be apparent to those
35, the core 24 and valve I4 will be moved down
skilled in the art that I have provided a novel
wardly together so 'as to cause the valve I4 to
improvement in the operation and control of
' be firmly seated.
-It will be seen therefore that
as soon as the- shunt circuit is interrupted the
magnetic valves whereby the diiiiculty of such
valves sticking in vopen position- _is positively
two coils I5 and 35 are again energized in series. 40
Under these conditions, as pointed -out above, the
magnetic eiïect of coil I6 is negligible, the mag
netic eiîect of coil 35 preponderating and posi-tively urging the core 24 downwardly to insure
that the valve closes and does notv stick in open
position. The magnetic effect of coil 35 tends 44:45
to neutralize and overbalance the slight magnetic
eiîect of coil I6 when the coils are energized in
series. It willl be seen therefore that I have
provided al compact- coil arrangement which pro 50
eliminated. The additional coil is very compact
vides positive insurance against the valves stick
ing in open position and yet does not require
that a pair of contacts be-made to Complete a
circuit when it is desired that the valve be closed.
and the manner of its control is such that a pre
ferred type of thermostat >may be used and the
use of additional switching or other equipment is
made unnecessary.
'
While I have shown a specific embodiment of
my invention it will be understood that this is for
purposes of illustration only and that my in
vention is to be limited only by the scope of the
appended claims.
I claim as my invention: ’ _
1. In a magnetically operated valve, in com
bination, a pull in coil and a drop out coil` con
nected in series, control means comprising elec
trical connections for shunting the drop out coil ,
If for any reason there is a power failure as is 55 to increase the energization of the pull in coil`
often the case and it is desired to open the valve
manually knurled knob 53 is rotated so as to
cause rotation of shaft 58 and rotation of pin 62
on to the curved surface 63 on to the lever 64.
for opening the valve, said coils having such rela
tive magnetic effect that when connected'iny se
ries the drop out coil operates the valve to closed
position, said control means including a thermo
As previously explained, this causes upward 60 stat having contacts which close at a predeter
movement of the right-hand end of lever 64
mined temperature whereby a circuit is pro
causing the core to be moved upwardly so that
duced through said electrical connections shunt
the valve is` opened. Due to the fact that in its
ing said drop out coil, and manually operable
valve open position pin 62 is resting on a nat
v'means for releasably latching said valve in a po
portion of lever 64 and the weight of the core is 65 sition near full open >when power fails, said last
resting upon the right-hand end of lever 64, the
means including -contacts which are closed and
pin 62 will be held frictionally on the lever against
which complete a shunt circuit around said drop
the action of the spring 51 which tends to return
out coil when> said valve is latched in said posi
j the same to the normal inoperative position.
tion, whereby when~ power is resumed said pull in
The rotation of knurled knob 53 and shaft V5l! 70 coil is energized opening said valve wide open,
in a.> manner to open the valve causes the disc 83
to be rotated away from engagement` with the
resilient switch blade' ‘I8 so as to allow engage
ment of contacts 'I9 and 80. vEngagement of'
said »manually operable means releasing whereby
said shunt circuit is interrupted causing closure
of the valve.
'
y
'
'
2. In a magnetically voperated device, in com
_ these contacts results in the establishment of an 75 bination,y an armature operatively connected to
2,269,016
' said device, a pair of coils having unequal and
5
ing said armature, stop means of magnetic ma
terial for engaging said armature when said
device is moved to its active position, one of
said coils having a greater number of turns than
opposing magnetic fields for operating said arma
ture, a source of energy, means connecting said
coils in series to said source so that the coil
having the stronger field determines the arma
ture position, means responsive to a condition in
dicative of the need for operation of "said device, a
pair oi switches sequentially closable by said con
the other and positioned with respect to said
armature so as to operate it in the direction of
said safe position, said other coil being posi
tioned so as to operate said armature in the direc
dition responsive means upon a unidirectional
tion of said active position, a source of energy,
change in said condition, a first circuit for shunt 10 a single circuit for causing operation of said de
ing said stronger coil so that the coil having the
vice to safe position, said circuit connecting said
weaker field determines the amature position,
said first circuit including both said switches in
series, a third switch operable upon increased
energization of said weaker coil due to shunting
of said stronger coil, and a second circuit for
shunting said stronger coil including the first of
coils in Iseries to said source so that said one
coil controls the armature, a circuit for causing
operation of said device to active position includ
lus
ing a connection for shunting said one coil so
that said other coil controls the armature, and
, switch means in said connection for selectivelyl
said pair of switches to close and said third switch
controlling the now of current in said circuits.
in series.
6. In combination, a valve mounted for move
3. In a magnetically operated device, in com 20 ment in a substantially vertical direction, a stem
bination, an armature> operatively connected to
attached to said valve _for _operating it between
said device, a pair of coils having unequal and
' an upward open position and a downward closed
opposing magnetic fields for operating said arma
position, an armature mechanically connected to
ture, a source of energy, means connecting said
said stem, and operable between an upward po
coils in series to said source so that the coil> 25 sition corresponding to open position of said valve
having the stronger field determines the arma
and a downward position corresponding to closed
ture position, means responsive to a condition in
position of said valve, a pair of coils for operat
dicative of the need for operation of said device,
ing said armature, one oi’ said coils having a
* a -pair of switches sequentially closable by saidgreater number of turns than the other and posi
condition responsive means upon a unidirectional 30 tioned with respect to said armature `so as to
change in said condition, a first circuit for shunt
operate _it in valve closing direction, said other
ing said stronger coil so that the coil having the
-coil being positioned so as to operate said arma
weaker field determines the armature position,
ture in valve opening direction, stop means of
said first circuit including both said switches in
magnetic material for limiting movement‘of said
series, a third switch operable upon increased 35 armature in valve opening direction, a source of
energizatìon of said weaker coil due to shunting
energy, a single circuit connecting both said coils
of said stronger coil, a second circuit for `shunt
in series with said source so that said one coil
ing saids stronger coil including the first to close
operates said valve to closed position, and a con
of said pair oi switches and said third switch in
nection including switch means for shunting said l
series, a »fourth switch, means manually operable 40 one coil so that said other coil controls the arma
to close said switch and simultaneously move said
ture and thereby operates said valve to open posi
armature to an intermediate position when said
tion, said switch means being operable to open
c_oils are deenergized, latch means for holding
and close said connection and thereby cause clo
said switch in closed position, connections be
sure and opening, respectively, of said valve.
tween said armature and said latch means for ,45. '7. In a valve operable between open and closed
tripping said latch means when said armature is
positions, in combination, an armature operative
moved to said second position, and a third circuit
i for shunting said stronger coil including said
fourth switch.
.
ly connected to said valve, a pair of coils for op
erating said armature, one of said coils having
a greater number of turnsthan the other, said
4. A thermostatically controlled valve, com 50 one coil being positioned so as to operate said
prising in combination, an armature operatively
armature to close said valve, said other coil be
connected to said valve, a pair of coils having
ing positioned so as to operate said armature to
' unequal and opposing magnetic fields for operat
open said valve, a source of electrical energy, a
ing said amature, means connecting said coils
circuit connecting said coils and said source in
in series so that the coil having the stronger 55 series so that thesame current iiows through
, field holds the armature in a position such as to
both coils, thereby causing said one coil to pre
maintain the valve closed, means responsive to a
dominate over said other coil and close said valve,
condition indicative of the need for operation of
and a connection shunting said one coil including
said valve, a pair of switches sequentially closable
switch means, said connection when completed>
by said condition responsive means upon unidirec 60 eiîectively deenergizing said one coil so that said
tional change in said condition, a first connection
‘other coil opens said valve, said switch means
for short-circuiting said stronger coil so that the
being operable by opening and closure thereof to
coilhaving the weaker field becomes effective to
vselectively control the operation of said valve
move the valve toward open position, saidv first
to closed and open positions, respectively.
connection including both said switches in series, 65
8. Ina valve operable between open and closed
a third switch closable in response to increased
positions, in combination, an armature operative
energlzation of said weaker coil due to short
ly connected to said valve and biased to a posi
circuiting of said stronger coil, and a second con
tion in which said valve is closed, a pair of coils
nection for short-circuiting said stronger coil in
ior operating said armature, one of said coils
cluding the first to close of said pair of switches
having a greater magnetic eiîect than the other,
and said third switch in series.
‘
`
5. In a devicev magnetically operable between
a first safe position and a second active position,
in combination, an armature operatively con
nected to said device, a pair of coils for operat
said one coil being positioned so as to operate
said armature to close said valve, said other coil
being positioned so as to operate said armature
to open said valve, a source of electrical energy,
' a circuit connecting said coils and said source in
6
2,269,016
series so that the same current flows through both
thermostat calls for discontinuance of said
coils, thereby causing said one coil to predomi
Supply-
nate over said other coil and close said valve, _. i
anda> connection shunting said one coil including
switch means, said connection when completed
«
-
-10. In a magnetically operated valve, a first
winding, a second winding, armature means as
sociated with said windings and connected to
said valve for operating said valve between open
effectively deenergizing said one coil so that said
and closed positions, said armature means having
other‘coil opens said valve, said switch means be
its magnetic center so arranged with respect to
ing operable by opening and closure thereof to
said windings that the effect of said ñrst winding
selectively control the operation of said valve
:to closed and open positions, respectively.
10 urges said armature means in opening direction
9. In a magnetically operated valve for con
of the valve and the effect of said second winding
urges said armature means in closing direction
trolling a supply of heating ñuid, in combination,
of the valve, means for energizing both windings,
an armature for actuating the valve, a pull in coil «
means for connecting said windings in series, said
and a drop out coil operatively associated with
said armature and connected in series, control 15 windings having such relative magnetic strength
means comprising an electrical connection for
that the effect of said second _winding prepon
shunting the drop out coil toincrease the ener
derates when said windingsl are connected in se
gization of the pull in coil for opening the valve,
ries, and an electrical connection including
said coils having such relative magnetic eiîect
switch means for shunting said second` Winding,
that when connected in series the drop out coil 20 said switch means operating when closed to com
operates the valve to 'closed position, said con
plete said connection and thereby render said
trol means including thermostatic means mov- > - first winding eiîective, to open said valve, said
able in response to a condition indicative of the
switch means operating 'when opened to break
necessity for supplying said heating iluid, and
said connection, thereby connecting said wind
switch means in said connection and controlled 25 ings in series and rendering said second winding
by said thermostat so as to complete said »con
effective to close said valve.
nection when said thermostat calls Afor a supply
_ of fluidand to open said connection when said
WILLIS H. GILLE.
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