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Dec. 17, 1946.
w. JEFFoRDs
FEED WATER APPARATUS FOR BOILERS
2,412,775 _
Dec. 17, 1946.
Y
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> l1_. w. JEFFoRDs
2,412,775
FEED WATER APPARÁTUS FOR BOILERS
Filed Nov. 6, 1944
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Dec. 17, 1946.
1_. W. JEFFORDS
2,412,775
FEED WATER APPARATUS FOR BOILERS
Filed Nov, 6, 1944
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Patented Dec. 17, `1946
UNITED
25,412,725
STATES . PATE
ÜFFI'CE
.2,412,775
FEED-WATER APPARATUS Fon Bomans
Leuell W. Jeffords, Chicago, Ill., assigner to
Roma JeHords, Chicago, Ill.
Application November 6, 1944,.’Serial No. 562,211 `
s claims. (c1. 122-456)
1
This invention relates to feed water appara- l
tus for boilers and is more particularly concerned
with an apparatus which does notl require the
use of a feed pump or injector for supplying feed
water to a boiler.
Another object of this invention is to provide
.
“
I
2
Referring now to the drawings for a better
understanding of this invention and more par
ticularly to Figs. 1 and 2 therein, the feed water
apparatus is shown as comprising a tank II hav
`ing a partition I2 provided therein to `define a
primary chamber I3 and a transfer chamber' I4.
The partition I2 is formed with a centrally dis
posed port openingv I6, of relatively smaller area
than the conduit employed to supply water to the
a feed water apparatus of this type which may
be employed to supply feed water from either a
supply of water under` pressure, such as the city
water main, or from a water storage supply tank 10
primary chamber I3, to permit feedwater to flow
of the typev employed to receive condensate re
from the primary chamber to the transfer cham
turning through the steam lines.
ber under control of a valve Il actuated by a
It is a further object of this invention to pro
vide . a feed water apparatusy which conserves
steam in operation by utilizing same to preheat
the feed water before it enters the boiler.
Another object of this invention is to provide
a feed water apparatus of a vacuum-gravity type
embodying automatic control means for supply
ing feed water to a boiler as required to main
tain the water level in the boiler between prede
termined levels.
`
Another object of thisA invention is to provide
an automatic control system in which means are
solenoid I8. Water is drawn into the 4primary
chamber I3 through a supply pipe I9 and past
a check valve 2 I.
y
A pipe 22 leads from the bottom of the trans
fer chamber to a steam boiler 23. A check valve
24 is interposed in the pipe 22 to prevent a re
verse flow of water from the boiler to the trans
fer chamber. A steam line 26 is connected be
tween the boiler and the upper end of the trans
fer chamber, and the flow of steam therethrough
is controlled by a valve 2'! which is opened and
closed by means of a solenoid 23. A by-pass steam
line 29 leads from the Pipe 25, between the valve
2l and transfer chamber, to the upper end of
provided for discontinuing the flow of fuel to a
boiler in the event the Water therein drops be
low a predetermined level.
the primary chamber I3. A check valve 3I is
Another object of this invention is to provide
interposed in the by-pass steam line 23 to pre
either a continuous or intermittent flow of feed
water to a, boiler for maintaining the water with 30 vent a reverse flow of fluid from the primary
chamber I3 to the transfer chamber I4 when
in the boiler between predetermined levels.
the valve 21 is closed.
A further object `of this invention is to pro
In the operation of the apparatus thus de
vide a feed water apparatus which is. relatively
scribed Vwater is drawn from the supply line I 9
inexpensive in construction, reliable in opera
into the primary chamber I3 by a vacuum pro
tion, and embodying a minimum number of mov
ing parts to insure that the apparatus will not
readily get out of order.
`
>
This invention embodies other novel features,
details of construction, and arrangement of parts
which are hereinafter set forth _in the specifica
tion and claims, and illustrated in the accom
panying drawings wherein:
Fig. l is a side elevational view showing an im»
proved feed water apparatus arranged for use in
supplying feed water from a water supply line to
a steam boiler.
- Fig. 2 is a wiring diagram illustrating the means
employed for automatically' controlling the flow
of water through the feed water apparatus to a
b_oiler.
Fig. 3 is a side elevational View illustrating a
modified form of this invention in which feed
water is> drawn from a condensate tank upwardly
through the feed water apparatus for delivery
Into the boiler by gravity.
duced within the transfer chamber I4 while the
valve I'I is in open position, after which the valve
I1 closes the port I6. In the event the water
level in the boiler 23 is below a predetermined
level as illustrated in Fig. 2, the solenoid I 8 is
40
energized to open the valve Il to permit the water
within the primary chamber I3 to pass through
the port I6 into the transfer chamber I4. When
the water level within the transfer chamber rises
to a predetermined level, the solenoid‘IS is de
energized to permit movement of the valve Il
to its closed position against the port I 6. The
valve 27 in the steam line 26 is then opened by
means of the solenoid 28 to permit steam to flow
from the boiler 23 into theY primary chamber I3
and the transfer chamber I4. When the pres
sure within the transfer chamber I4 is equal to
the pressure within the boiler 23, the feed water
will pass by gravity fron-_i` the transfer chamber
I4 through the pipe 22 tothe boiler. The by-pass
pipe 29 is provided `to >equalize the pressures on
2,412,775
3
opposite sides of the valve I1 ln order to main
tain same against the port opening I6 when steam
is introduced into the transfer chamber.
After the water leaves the transfer chamber
I4, the steam supp-ly valve 21 is automatically
closed and the valve I1 is opened to permit water
to flow from the primary chamber I3 through the
, port opening
4
.
and break the circuit to the solenoid 18 which,
I6 into the transfer chamber. This
in turn, acts to close the valve 19.
'
The water control solenoid I8 is connected to
a source of current through leads 8| and 82. A
pair of switches 83 and 84 are interposed in the
circuit and are adapted to be opened and closed
responsive to energization and de-energization of
their respective relays 56 and 48. A manually
operable switch 86 may be >provided in the circuit
new supply of water acts to condense the steam
82 if desired.
and thereby createa vacuum within the transfer 10 , The solenoid 28 is connected to a suitable source
water
through
the
pipe
I9
of current through leads 81 and 8‘8 having a
chamber to draw feed
switch 89 interposed therein for opening and
into the primary chamber I3'.>
The solenoids I8 and 28 are energized by means
closing the circuit responsive to de-energization
of an electrical circuit including suitable relays
and energization of the relay 48.
and electrodes of the type now commonly em 15
The apparatus thus described functions au
ployed for automatically controlling the water
tomatically to supply feed water to a boiler when
level within boilers. The present circuit contem
the water level within the boiler falls below the
plates the use of three electrodes 36, 31 and 38
lower end of the electrode 31 and thus breaks
' mounted within a suitable housing 39 disposed
the holding circuit 58 through the relay 56. When
adjacent the normal water line of a boiler and 20 the relay 56 is thus de-energized, the switch 83
having inlet pipes 4I and 42 leading from thev in
closes the circuit 82 tothe solenoid I8 which
terior of the boiler to the interior of the housing
acts to raise the valve I1 away from the port I6.
>39. A pair of electrodes 43 and 44 are provided
Water contained within the primary chamber
within the transfer chamber I4, the electrode 43
I3 passes through the port opening I6 into the
being disposed adjacent the bottom thereof and 25 transfer chamber I4 until the water level therein
rises to complete a circuit through the upper elec
the electrode 44 being disposed approximately 1/3
of the distance between the bottom and the top
trode 44, lead 43, relay 48, and secondary wind
ing 49. The relay 48 is thus energized and acts
of the transfer chamber.
One circuit is completed from the upper elecn
to close the switches 52 and 89 and to open the
f trode 44 through a lead 46 to a switch terminal
switch 84. The opening of the switch 84 breaks
41 and thence through a relay 48 and a secondary
the circuit to the solenoid I8 and causes the
transformer winding 49 to the ground. A holding
circuit is provided for the relay 4'8 by a lead 5i
which extends from the lower electrode 43 to a
valve I1 to move to its closed position in seated
engagement against the port opening I8. The
closing of the switch 52 completes a holding cir
switch 52 thence through the relay 48 and trans 35 cuit to the relay 48 which will be energized until
former winding 49 to the ground.
the water level within the transfer chamber falls
Another circuit is completed from the electrode
below the lower electrode 43. The closing of the
38 through a lead 53 to a switch terminal 54 and
switch 89 acts to complete the circuit 88 to the
solenoid 28 to energize same and thereby open
thence through a relay 56 and secondary trans
former winding 51 to the ground. A holding cir 40 the valve 21 in the steam line 26 which leads
from the boiler to the transfer chamber and also
cuit is provided for the relay 56 by means of a
to the primary chamber through the by-pass 29.
lead 58 extending from the electrode 31 to a
When the pressure within the transfer chamber
switch 59 and thence through the relay 56 and
>I4 is equal to the pressure within the boiler, the
4secondary transformer winding 31 to the ground.
Vwater within the transfer chamber will flow by
A third circuit is completed by means of a
gravity through the pipe 22 and past the check
lead 6I which extends from the electrode 36 to
valve 24 into the boiler. When> the holding cir
ya relay 62 and thence through a secondary trans
cuit 5I between the electrode 43 and relay 48 is
former winding63 to the ground.
The windings 49, 51 and 63 form secondary y broken by movement of the water level below the
electrode 43, the relay 418 is deenergized 'and per
windings for transformers 64, 66, and 61, respec
tively. 'I‘he transformers 64, 66 and .Glare pro
vided -with primary windings 68, 69 and -1I,-=re_spectively, which are connected to-asource of cur
rent by means of leads 12 and 13 having a suit'
mits opening oftheswitches 52'and 89"an'd clos
ing of the .switch 84;"'The de-energlzati'o'n ofthe -
relay`> 48- -thus completes >the "cycle of operation'.
The apparatus continues to operate automatically
able operable switch 14 interposed therein. The
transformers are carefully matched and second
in the manner thus described until the water
arily connected to their respective relays in a
electrode 38.
within the boiler rises into contactwith the upper
`
'
manner well known in this art, and the electrodes
When the water level within the'boiler is in
predetermined rise and fall of the water level
completed through the lead 53, relay 56 and sec
ondary winding 41 to energize the relay 56 which
then acts to open the switch 83 and close the
switch 59. Opening ofthe switch 83 breaks the
circuit 'tothe solenoid I8 to render ysame inoperaf
tive until the water level in the boiler falls below
the electrode 31 which forms part of the holding
36, 31 and 38 are suitably positioned so that a 60 contact with the upper electrode 38 a circuit is
acts to make or break the electrical circuits con
trolling- the relays.
'
The electrode 36 is employed to control the sup
ply of fuel oil or gas delivered through conduit
16 to the boiler. When the electrode 36 isin con
tact with the water within the boiler the relay 62
is energized to close a switch 11 in a circuit 15
leading from a- source of current to a solenoid 18.
When the solenoid 18 is thus energized, it acts to
open a valve 19.to permit the-fuel to now through
thev conduit 16 to the boiler.- -In theevent the
water level within the boiler falls below the lower
end of the electrode 36, the circuit to the relay
62 is broken and permits the switch 11 to open
circuit 58 for the relay 56.
v
It will thus be seen that the water level within
a boiler may be maintained between two p_rede
termined-_levels a-s determined by the positionV oi
the electrodes 31 and 38. If for any‘reasorr'th'e
water level within the boiler fa‘ls below'the lower
end vof thel electrode '36, the supply'pf fuel'tojrthe
boiler will be cut off.
"
'
" " ‘ ‘
'
‘
5
Fig. 3il1ustrates a modified form of this inven
in the operation of this apparatus wouldlbe dueto
the radiation of heat from the tank II and the
pipes 22, 26 and 29 and that this heat loss could
be reduced to a negligible proportion by properly
covering these parts with insulating material.
While this invention has been shown in but two
forms, itis obvious to those skilled in the art that
tion in which the feed water for the boiler is
stored within a condensate tank IOI . Feed water
is supplied to the condensate tank throughv a con
densate return line |02 and a, feed water line |03’.
The water level within the condensate tank is
regulated by mean-s' of a pair of electrodes |04
and |06, the electrode I04‘being connected in a
circuit Iû'I leading to a switch terminal |08,
thence through a relay |09 and secondary wind 10
from the spirit
ing III of a, transformer IIZ‘ to the ground. The
tion.
electrode |06 is connected in a, holding circuit I'I 3
I claim as my invention:
leading through a switch II4’, relay |09 and sec
l. In aA liquid transfer device for a> boiler, a
ondary winding III to the ground. The primary
transfer chamber having an outlet leading to the
winding I I6 of the transformer is connected to
boiler, a primary chamber having a liquid inlet
a suitable source of current.
and disposed to supply liquid to said transfer
The supply of feed water through the pipe |03
chamber, a power actuated normally closed valve
is controlled by a valve II‘I which is operated by
for controlling the passage of liquid from the
means of a solenoid I|8 connected to a suitable
primary chamber to the transfer chamber, elec
source of current through a, circuit I I9. vA switch
trical means having a connection to the ‘boiler
I 2| is interposed in the circuit II9 to make or
break the circuit leading to the solenoid I I8 when
actuated by the relay |09.
In the operation of this electric control means
for regulating the water level within the con
densate tank, a surface contact between the 25 means operable for supplying steam to the trans
fer chamber to preheat the liquid therein and to
water and the e’ectrode I04 acts to energize the
relay |69 to complete the holding circuit through
the switch I I4 and to open the switch I2I in the
tion of said valves, said means including a pair
icircuit leading to the solenoid I I8. De-energiza
tion of the solenoid II8 acts to close the valve 30 of electrodes disposed within the transfer cham
ber and electrically connected for alternately
I I'l and to stop the flow of make-up water lead
operating said valves.
'
ing through the pipe |03 to the condensate tank.
2.
In
a
boiler
apparatus
of
the
character
de
When the water level within the condensate
scribed, a primary chamber having a liquid inlet,
tank falls below the end of the electrode |06, the
a transfer chamber having a liquid outlet leading
to the boiler, said primary chamber having a
passage leading therefrom to the transfer cham
ber, a power actuated normally closed valve
holding circuit II3 to the relay I 00 is broken,
thereby opening the switch |I4 and closing the
switch I2I. The closing of the switch I2I causes
the solenoid I I8 to o-pen the valve II'I to permit
the make-up water to flow through the pipe |03
into the condensate tank.
,
In the operation of this modiñed form of the
invention, it has been found that the vacuum cre
ated within the transfer chamber I4 by condens
ing of the steam therein serves to draw water up
wardly through the pipe I9 and into the primary
chamber I3. The distance the feed water may
be drawn upwardly through the pipe I9 depends
upon the tightness of the system, as any leakage
of air thereinto will serve to offset the vacuum
created within the transfer chamber I4. The
apparatus disclosed in Fig. 3 is otherwise similar
in operation and construction to the form of the
invention illustrated in Figs. 1 and 2.
While the two forms of apparatus shown and
described are designed to provide an intermittent
ñow of feed water to a boiler, it is obvious to those
40
opening said power actuated normally closed
valve when the water within the boiler falls be
low a predetermined level, valve means operable
-for supplying steam to the transfer chamber,
and electrical means for automatically control
ling the alternate operation of said valves re
sponsive to variations’ of the liquid level within
said transfer chamber.
'
3. In a feed water apparatus for a boiler, a
transfer chamber having a steam inlet and a
Water outlet leading to the boiler, power actuated
valve means for controlling the ñow of steam to
said transfer chamber, power actuated normally
closed valve means for controlling the flow of
water to said transfer chamber, electrical means
having a connection to the boiler and responsive
skilled in this art that a pair o-f tanks |I could
to the water level within the boiler for automati
readily be connected and controlled for alternate
callyV opening said power actuated normally
operation to provide a continuous flow of feed
water through a common supply pipe 22 to the 60 closed valve when the water within the boiler
boiler 23.
falls below a predetermined level, and electrical
means for controlling the alternate opening and
As is also well known in this art, it is desirable
closing of said valve means, said electrical means
to provide relatively small quantities of make-up
water to a boiler either in the form of a contin
uous flow or an intermittent iiow in order to pre
vent deterioration of parts of a boiler due to chill
ing and consequent alternate contraction and ex
pansion.
It will be noted in the operation of this appa
ratus that the steam employed for transferring
feed water to a boiler is not wasted as it serves
to preheat the feed water prior to its transfer into
the boiler.
It will further be noted that the only heat loss
including circuits having electrodes disposed in
spaced relation within said transfer chamber for
controlling the operation of said valve means
responsive to predetermined variations of the
water level within the transfer chamlber.
4. In a feed water apparatus for a boiler, a
transfer chamber having a steam inlet and a
`water outlet leading to the boiler, power actuated
-qvalve means for controlling the flow of steam to
said transfer chamber, power actuated normally
closed valve means for controlling the flow of
water to said transfer chamber, electrical means
2,412,775
7
having a connection to the boiler and responsive
to the water level within the boiler for .auto
matically opening said> power actuated normally
’ closed valve when the water within the boiler
falls below a predetermined level, electrical
means for controlling the alternate opening and
the liquid within the transfer chamber rises into
contact with the 'upper electrode, and means
associated with said lower‘electrode for closing
said steam control valve and opening said liquid
control valve when the liquid level within the
transfer chamber falls below said lower electrode.
6. In a liquid feed device for a boiler, a primary
chamber having a liquid inlet, a transfer chamber
including circuits having electrodes disposed in
having a liquid outlet and a steam inlet leading
spaced relation within said transfer chamber for lí) to thev boiler, said primary chamber having a
controlling the operation of said Valve means re#
passage leading to the transfer chamber, a power .
closing of said valve means, said electrical means
sponsive to predetermined variations of the water
level within the transfer chamber, and electrical
means associated with the boiler and acting re
sponsive to predetermined variations of the water
level therein for controlling the operation of said ‘
other electrical means.
5. In a liquid feed device for a boiler, a primary
chamber having a liquid inlet, a transfer cham
ber having a liquid outlet and a steam inlet lead
ing to the boiler, said primary chamber having
a passage leading to the transfer chamber, a
power actuated normally closed liquid control
actuated normally closed liquid control »valve
interposed in said passage, electrical means hav
ing a connection to the boiler and responsive to
the water level within the boiler for automati
cally opeping said power actuated normally
closed Valve when the water within the boiler
falls below a predetermined level, a steam con
trol valve'interposed in said steam inlet, an upper
electrode disposed within said transfer chamber,
electrical means associated with said upper elec-'
trode for'closing said liquid control valve and
opening said steam control valve when the liquid
valve interposed in said passage, electrical -means
within the transfer chamber rises into contact
having a connection to the boiler and responsive
with the upper electrode, means associated with
to the water level within the boiler for auto 25 said lower electrode for closing said steam con
matically opening said power actuated normally
trol valve and opening said liquid control valve
closed valve when the water within the boiler
when the liquid level within the transfer cham
falls below a predetermined level, a steam control
ber falls below said lower electrode, said elec
valve interposed in said steam inlet, an upper
trical means associated with -said upper and
electrode disposed within said transfer chamber, 30 lower electrodes within the transfer chamber
a lowerl electrode disposed within said transfer
being controlled by said first mentioned electri
chamber, electrical means associated with said
calmeans.
l
upper electrode for closing said liquid control
valve and opening said steam control valve when
l
Y
~
LEUELL W.
JEFFORDS.
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