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Патент USA US2411589

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Nov. 26, 1946.
Filed April 11 ,
5 Sheets-Sheet .1
Nòv. 26,l 1946.
T. N. PlNloN
y 2,411,589
- Nov. 26, 1946.
2,41 1,589
Filed April ll, 1944
5 sheets-sheet s-
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Nox?. 26, y1946.
>T. N. PiNloN- l. `
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NOV. 26, 1946. I `
'T_vN, P|N|ON
Filed April 11, 1944
5 sheets-sheet s'
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35 a4
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Patented Nov. 26, 1946
I if ¿£111,589
i _ `Thomas N.,I_‘inìon, Denver, Colo.
Application'Aprilïll, 1944, Serial No.4530,512
' . A_11j claims.
This invention relates to Vboiler Water feed-de#
vices adaptedV to supplywater [to and during-_ the
operation of boilers employedfor thefgeneration
of steam, and `more particularly tçiîsluchdevices
arranged v for Y* the automatic
operation of the principal control means of the
~ assembly.
With the above principal, and other more de
tailed, objects in View, my inventionv consists -in
' _maintenance ‘of’ "a
the construction, arrangement, and combination
given level of Water Within the vassociated boiler, -‘ of
elements hereinafter set forth, pointed out in
and has
_as a primary _object_to provide'anjj'm?
_ my claims, and illustrated by theaccompanying
provedunitary device of the character described _ drawings, in Which->
susceptible `of fully automatic and _con__tinu'ousI
Figure >l is a cross section_taken vertically and
>operation in association with a‘steamjboilerof 10 axially
through a conventionalized embodiment
any type to maintain the desired, predetermined
rof myimproved device with the control elements
level of Watervvithin such boiler.> _j _
A further object of the inventionis _tofprovide
thereof positioned for flow of feed Water" toY an
associated boiler. Figure?! is arview similar t'o
an improved ,boiler Water feedV devicerespo-nsive
Figure 1 illustrating the relative positions of the
to lowering of _the Water. level__in_ _itsassociated 15. control
elements in their vcyclic operativepha'se
boiler below a predetermined plane toY automati
next subsequent to that exemplified in 'said-'Fig
cally feed additional suppliesY of _Water into said
ure l. Figure 3 isv a View" similar to Figure-- 2
boiler against they steam _ pressure.: thereinjuntil
the boiler Water level is reestablishedi'at .the
desired predeterminedplane.
__ Q.
A furthe-r objectjof _the invention _is__to_ provide
an improved boiler Water feed devi__ce",a1_,1_torl’lêiti-k
' cally operable to maintain a predetermined‘level
illustrating the relative'positions assumed by the
control elements in that phase of their operative
cyclesubsequent to the showing of Figure 2. *Fig-V
ure 4 is a view similar to» Figure 3 illustratingthe
relative positions of the rcontrol elements in the
final phase of their operative >cycle aridi just
of Water within its associated boiler:vr through .the
agency of the boiler steam pressure assisted sole 25 prior to their return to the> positions shovv'nV in
`Figure 1. 4’Figure 5~is a, fragmentaryQdetail sec
* ly by a Water supply pressure _materially less
than the boiler pressure.
tion axially through they compound " valve fas
A further object of the invention isto. provide
sembly in the -relationship of Yelements sliovvn’in
elevation in Figure l. Figure 6 isa fragmentary
an improved boiler Water feed device> including
improved meansY for balancing, internal y‘boiler 30 detail section through and ¿illustrating _an alter
native operative position of elements Within con
pressure against a supply of feedwater sothat
trol means actuatable by the auxiliary heat'-v
the latter may flowby gravity. to- seek and estab
lish its levelw'ithin the boiler. _~
A _further object of theinvention` is4 to-pro
vide an improved operative combinationof heat
responsive means associatedvfith the device.
` Figure 7 is a fragmentary, detail section, on _an
enlargedfscale, taken on the indicated line 1_1'
35 o-f Figure 2.
>Figure 8 is a fragmentary, detail
responsive >means in actuating»relationtvithiconf
section, on an enlarged scale, illustrating more
trol valve elements to 'position> said'elements Ífor
ì in _detail the operative relationship of relatively
steam iloW and pressure control Withinand
movable elements of the compound valve assem
through a water feed device in response tewater
shown in Figure 4. Figure 9 vis >a plan
level changes within an associated boiler.
view, partly insection and on a reduced scale,
A further object of the invention is to» provide
ofA the assembled device as viewed from the plane
improved heat-responsive. steam~actuated~means
by the line tftA of Figure _3, certain
for repetitiously charging 'ajfeedfwater reservoirl >i indicated
connectionsbeing omitted for -the sake 'of clarity".V
from a feed Water
sup-ply and emptying said,` lï‘igure 10 is an elevation of the improved _device
reservoir» into anVA associated ‘l boiler 45 as> associated @and `operatively related with _a
against the internal boiler pressure in response
to ak lowering Vof the Water level Within said
conventionalbciler .for practical usaY _
'_ f
In the construction` of kthe improvement as
_ boiler below a predetermined plane.
shown, the numeral, lll designates a preferably l'
A further object of the invention is toprovide
fcylindricalhousing defining and enclosing a rela-_
an improved combination with a heat-responsive, 50 tivelylarge chamber or reservoir adapted {tore-à'
ceive and accumulate
charge of boiler feed
steam-actuated boiler Water feed device of aux-A
iliary heat-responsive, steam-actuated means
water. The housing lû is closed to communica
tion with the atmosphere exceptashereinafter
vice upon, and to Warn of, failure in the normal 55 specifically provided, Vis _adapted for disposition
with itsv axis substantially vertical and in such
operable to-continue the‘functioning lof the de
deñnite altitudinal relation with the desired wa
ter level of the boiler to be served thereby as
is hereinafter set io
" _, and is constructed to
accommodate and
istand the operating p-res«
sures of the boiler with which it is associated.
The top and bottom closures of the housing I5
are preferably substantially plane, parallel, and
outwardly oi the barrel from and in uncovering
relation with the ends of the respective lines
23 and 24, so that steam from the line 23 mayl
enter the annular chamber about the outer body
portion of the upper valve I8 between the outer
head I9 and rib 2!) thereof and thence escape
through the ports I5 into the upper portion oi
the housing I0, while water accumulated within
said housing may pass through the ports I'I, into
sures are intersected by a straight, tubular, valve 10 the annular chamber about the outer portion
barrel I I coaxial with said housing and extending
of the lower valve I8 between the outer'head I9
through and equally at each end beyond said
and rib 20 thereof and thence through the pipe
perpendicular to the housing axis, and said clo
The outer ends of the barrel Il are
closed by suitable cap elements i2 through each
24 to the boiler; while, when said valves I8 are
at the outer limit of their range of travel, at
their position of maximum separation with their
municates to include the opposite end portions 15 outer heads I9 engaging the caps i2 of the barrel
of which a branch i3 from a steam line lll com
of the barrel Ii in a flow circuit common to
II, as shown in Figures 3 and 4, the ribs 20 of
said valves engage the barrel walls in obstructing
relation between their respective flow lines and
the top
closurea wall
of the
of housing
the barrelIt li at
ports and thereby inhibit inflow of steam to and
a point midway between. the top and bottom
outflow of water from the housing interior.
Positioning of the Valves I8 at either eXtreme
housing closures, and communication between the
of their range of travel is automatically con
barrel interior and the reservoir deiined by the
housing IEB is provided by a plurality oi ports ie
trolled through means and agencies hereinafter
intersecting the barrel wall just beneath the
described which act to alternatively admit steam
housing top closure and by a similar series of 25 to mid or end portions of the _barrel II through
ports Il intersecting the barrel wall just above
the line I5 or `line and branches I4, I3, it being
obvious that when steam is admitted through the
the housing bottom closure.
line I5 to the space between the inner heads I9
The barrel Il serves as a mounting and slide
of the valves I8, the line I4 and its branches I3
bearing ior a pair of double-spool valves »i8
closely ñtted for axial reciprocation therein. The 30. being open to exhaust, the said valves i8 act as
pistons Within the barrel II and are moved apart
valves I8 are identical in construction and are
to the outer limit of their range of travel, while
disposed in opposition within the'barrel II. Each
when steam from the line I4 is admitted through
of the valves i8 is a unitary, cylindrical mem
the branches I3 simultaneously to the outer end
ber oi considerable length formed with an en
larged, annular head i9 at each of its ends for 35 portions of the barrel II, the line I5 being open
to exhaust, the said valves again function as pis
close-ñtting, slidable engagement with the bar
tons and are moved inwardly of the barrel to the
rel walls, and with an annular rib 20 interme
inner limit of their range oi travel with their
diate the heads i9 for like sealing reciprocation
studs 22 engaged. To insure proper positioning
within the barrel, the heads I9 and ribs 2i! pref
erably being provided with suitable packing or to of the valves I8 at the inner limit of their range
of travel and to prevent possible overtravel oi
sealing rings 2| to minimizeleakage of pres
one of said valves, it may be desirable to pro
sures ~or fluids between said elements and the
vide a suitable stop, such as an inward projection
adjacent barrel walls. The body portions of
of the line I5 within the barrel, beyond which
the valves I8 between their rib 2i! and heads i9
are reduced in diameter to provide annular cham- ," neither valve may pass.
bers deiined between the valve body, rib 2i), re«
Control of the admission of boiler feed water
spective' head I9 and corresponding portion of
to the interior of the housing I0 and automatic
positioning of the valves I8 is largely the func
the barrel walls, Opposed inner heads of the
tion of a multiple, compound, thermostatically
valves I8 are provided with axially-projecting
studs or bosses 22 adapted to engage when the -"‘ actuated valve assembly operatively housedin a
tubular slide chamber 25 disposed in spaced, ax
valves are moved inwardly of the barrel towards
ially-parallel ,relation with the barrel Il in or
each other and arrest such valve travel with a
as an enlargement of one side of the housing I5.
space separating the adjacent inner valve heads.
A steam line 23 opens through the wall of the ì The lower end of the slide chamber 25 is closed
by a plug, or similar element, 25 having an inner
upper extension of the barrel lI just above the
top closure of the housing ID and connects with
surface substantially coplanar with that of the
housing bottom closure, and the upper portion
the steam dome IIlI of the boiler Iilll to be served
of said chamber 25 projects through and above
in such manner as to deliver steam at boiler
the housing top closure, wherethrough it is suit
pressure to said upper barrel extension, and a
ably sealed, and has its upper end suitably closed
Water line 24 opens through the wall of the lower
barrel extension just below the bottom housing
by means of e, cap 21. Communication between
the interior of the housing IE) and the bore of
closure and connects with the boiler le@ to be
the slide chamber 25 is provided at two points,
served at some convenient point below the normal
one or a series of ports 28 opening through the
water level therein. The valves I8 control the
admission of steam to and the escape of feed
wall of said chamber dividing it from the hous
water from the reservoir defined by the housing
ing reservoir just below the housing top closure
I0 and to that end the lengths of said valves and
and one or a series of ports 29 opening through
the positions of the ribs 2i! therealong are so
said chamber wall in somewhat spaced relation
adjusted as to provide that, whenA the valves
above the housing bottom closure. A stud or post
are at the inner limit of their range of travel
3i! is fixed centrally'of and rises axially from the
with their studs 22 engaged, as shown in Figures
inner, upper surface oi the plug 2e
1 and 2, the said ribs 2li will -be positioned in
upwardlywithin the lower portion of the cham
wardly of the barrel from and in uncovering re
ber 25 to a point somewhat above the port or
lation with their respective ports I5 and I'I while
ports 2.9, and Vsaid post 30 serves as a base
the outer heads I9 of said valves will be disposed
both. A second steam line I5 is suitably sealed
and support for a quick-acting, thermostatic
element; 35|' which is _secured at its lower end t0
the upper end of said post and risesthereabove
centrally within the chamber 25; said element
3| Vbeing constructed and arranged for eXpan
sion when subjected to higher temperatures, and
magnitude present .in the upper end of said slide
chamber may, by transmission through the open
‘flow line 4|, act within the chamber 38 to flex the
diaphragm 39 and" move the plug 31 into flow
obstructing relation with its fitting, and thus
close 'the valve 36 against flow through the line
31';'escape or relief of the so-acting pressures at
consequent upward. projection of its upper end
away from the post 36, and for retraction when
the chamber 25 operating to correspondingly re
subjected'` to -lower temperatures, with conse
the pressure within the chamber 38 for con
quent downward travel of its upper end towards 10
sequent return of the’ plug 31 to flow-permitting
saidl post.
position.v Since, under certain operating condi
A plurality of pipes or tubes 32 connect through
of the improved apparatus, water retained
the plug '26 to open into the annular space be- y
in the line 34, iitting 33, pipes 32 and lower por
tween-the post 36 and wall of the chamber25 at
the lower end of the latter, and said pipes 32 15 tion of the chamber 25 may adversely affect actu
ation of control elements of the apparatus when
operatively connect `at their lower ends, as
valve 36 is closed, means is provided for auto
through a common ñtting 33, with a water sup
matically returning a portion of such retained
ply line 34, leading to said ñtting 33 from a suit
water to the flow line 34 behind the check-Valve
able source of boiler feed water (not shown) so
at times; such means comprising a water flow
that water for boiler feed may be fed through 20
line 42 connecting at one end with the supply line
the line 34, fitting 33 and pipes 32 to and within Y
34 behind the check-valve 35 and at its other end
the- lower end of the chamber 25 and thence
with said supply line between the fitting 33 and
through the port or ports- 2S to the reservoir de-'
valve 36, thus vhwy-'passing the valves 35 and 36,
lined by the housing lil. The improved boiler
anda `pressure-responsive valve 43 controlling
water feed apparatus is not of pump or suction
communication between the lines 34 and 42 where
type,V hence it is essential for successful opera
the latter meets the former between the valve 36
tion of the apparatus thatthe boiler feed'water
and ñtting 33. The valve 43 ymay conveniently
befed'to and through the supply line 34 under
befof the same type and general construction as
such degree of pressure as ¿willserve t0 insurey
Ihe, valve 36, and is/so shown, the diaphragm
flow within the housing‘liì against normal atmos-y :
actuating` pressure chamber portion of the valve
pheric pressure, and since rmany agencies, such
43 being connected by means of a branch or eX
elevated tanks, pumps, air pressure systems,
tension 4l’ with the flow line 4 I, but the valve 43
and public Water supply systems, `are commonly
differs in operative character from the valve 36
available and have been heretofore generally used
in that the flow-controlling plug-31’ of the for
for the same and analogous purposes, no showing
mer is arranged to obstruct iiow between the lines
or description of means for the supply of water
42 and 34 when there is no fluid pressure in the
under pressure to and through the line 34 is
flow line ¿Hand to open for flow communication
deemed necessary herein, Similarly, While the
between saidlines 42 and 34 when there is pres'
improvedV apparatus will operate tofeed water
' surefinthe line 4|, so that, responding to the same
delivered thereto as> a iiuidv atfany .temperature
below theVaporizing> point, it has long been com .40 control, presence or absence of pressure in the
vline 4|, the valve 43- is open when the valve 36 is
monpractice to preheat‘boiler feed water and
closed and the valve 43 is closed when the valve 36
many agencies and devices are available and in
is open, there hence being no water iiow in either
common‘use Afor such purpose, hence, since the
direction through the by-pass yline 42 when the
practicability ofthe- improved device is enhanced
line 34Y is opento supply'feed water to the cham
by preheating 0f the boiler feed water, it will be
ber 275 and housing,` lll.
, y
assumed that the supply thereof fed to and
The portion of the slide chamber 25 above the
thei‘mostatic element 3i slidably accommodates
and is substantially i’illed by an integral, multiple
through the line 34 is at a. temperature raised
above the normal range;
As is usual practice, the supply line 34 is pro
vided with a check~valve 36 at some distance
from its connection with the» fitting 33, so as to
inhibit reverse iiow Yof water» within said line,v and
flow of water through said line 34 to the chamber
25 and housing lf3 isl automatically controlled by
a pressure-responsive valve 36 in said line between
the ñtting 33 and checkfvalve,35.V The valve 36
may be of any speciiic‘type and construction'suit
spool type, cylindrical valve unit 44 closely fitted
within `the bore of said chamber and disposed for
limited axial reciprocatio-n therein. A plurality
of> legs 45 are fixed to and depend in circum
ferentially-spaced relation from the lower end
55 of the valve unit144 and freely traverse the space . between .the walls ofthe chamber 25 and the ele
ment 3l,l preferably in somewhat spaced relation
inwardly from thechamber walls, and ñxedly en
abletoy its purpose-and mode of actuation, and is
gage at- their lower ends with an annular plate 46
conventionally illustrated ascomprising a fitting 60. slidably
engaging about the post 30 and substan
wherein a plug 3l'is slidable radially and in
wardly to obstruct flow through the iitting and , tially filling the space between said post and the
adjacent wallsof the chamber 25 atthe lower
radially and outwardly to permit flow through
said fitting, theouter end of said plug 3'! enter
ing avvpressure chamber 38 divided by a dia
phragm i353 and centrally engaging said dia'
phragm, which is normally urged, by means ofv a
spring 43, into uniiexed dividing relation with the
chamber'38 and consequent How-permitting re
end of the latter. The plate 46 is adapted to
engage with its plane lower surface against the
upper face of the plug 26 and close overthe vup- .
per, otherwise open ends of the'pipes 32, at times,
and the thickness of theplateç46, length of the
legs 45; and length of the valve unit 44, are so
as t'o‘position the lower end of said
lation of the plug 3l within its fitting. The por- - 70
valve unit inspaced relation above the upper end
tion of the pressure chamber 38 on the side of l
of the contractedv therinostatic element 3| , and
the diaphragm opposite the plug 3'! is connected
the upper end of said valve unit in spaced rela
by»A means ofV a iiowline 4|, Áthroughthe cap 2l,
tion below the lower surface of the cap 21, when
with the interior of the upper end'of the slide
chamber 25, so that _fluid pressures of suflic'ient 75 saidwplate‘ 46 engages the upper surface of the
plug'iö; Ías'isshown in Figures 1 and' 2, and't'o
travel, as shown in‘Figures l and 2, to fully cover
and close said porter ports. The Vvalve unit sec
tion tric is spaced from the section 44b by the
zone of reduced diameter forming the compart
position the lower surface of said plate 46 vabove
the upper margin of the port or ports 29 when
the upper end of the valve unit 44 is in engage
ment with the lower surface of the cap 21, as is
ïown in Figures 3 and 4, said two positions of
the valve unit ¿4 and its attached elements being
ment E in such manner as to position the section
¿4c as a baiiie between the opening ends of the
the two operative positions and reciprocative lim
lines i5 and 48, so that theV line 49 opens below
the section Mc intothe compartment B, which is
its of the unit.
The valve unit fifi is divided by means of four
exterior annular grooves or Zones of reduced di
ameter into ñve spaced sections of full diameter
otherwise closed, and the line l5 opens above the
section ¿to and into the lower portion of the com
adapted to closely fit within and slidably engage
the walls oi the slide chamber 25, said sections
being respectively designated from bottom to top
of the valve unit by the reference numerals 44a,
Mb, £40, @ed and ¿iQ-e, and the Zones of reduced
diameter forming the compartment C is such as
partment C, according to the showing of Figures
'l and 2. The axial length of the zone of reduced
to position the valve unit section 44d as a baffle
between the opening ends of the steam line I4
the exhaust line t8, so that said latter line
opens into the upper end of the compartment C
diameter, each of which defines an annular com
below the section ¿54d and the line I4 opens into
partment between the chamber walls, valve unit
the lower portion of the compartment D above
surface, and adjacent valve unit sections, are re
said section, again referring to the position of the
spectively designated by the indicia A, B, C and 20 elements shown in Figures 1 and 2, and commu
The zones of reduced diameter may be uni~
nication is thus established between the line I5
form in depth radially oí the valve unit 44, but
and exhaust line ¿58, through the compartment C.
they are not uniform in length axially of said
The end none of reduced diameter forming the
valve unit, `and the valve unit sections set off
compartment D is of such axial length as to po
thereby are not necessarily uniform in dimension
sition the upper end valve unit section 44e just
axially of the valve unit, the relative size and
above the opening end of the steam supply line
_relationship of said zones and sections being de
el and as a battle closing away the compartment
termined by considerations of operative position
D from communication with the space in the slide
and relationship, as will hereinafter appear. To
chamber bore between said section 44e and the
enhance engagement of the valve unit sections
chamber cap 2i, so that the lines 41 and I4 both
against the walls of the chamber 25 in a manner
open into the compartment D when the valve unit
to minimize leakage of fluid pressures therebe
is in the position shown in Figures 1 and 2 and
tween, the peripheries of said sections may each
thus provide a continuous passage for steam from
be provided with one or more compression or
said line ¿il through the compartment D and into
sealing rings, as is common practice.
the line i4. Thus, with the elements of the valve
The wall portion of the slide chamber ‘Z5 ex
unit et in the position shown in Figures 1 and 2,
tending above the housing top closure is inter
the _plate 4e is closed over and against the upper
sected at five altitudinally-spaced points by flow
ends of the pipes 32j the port or ports 28 is
lines which open through the chamber >walls for
closed by the section 44h; inflow of steam through
communication with the chamber bore, said now L the branch il@ is arrested and coniìned in the
lines being, in their altitudinal order from the top
compartment B by the sections 44h and 44e; com
of the slide chamber downward, a steam supply
munication .for flow from the line I'5 to the line
line e? arranged, through valve fittings and con
¿tél is established through the compartment C;
nections hereinafter to be described, to supply
and communication for inflow of steam from the
steam at boiler pressure from the steam dome I0 lv
line 4i to the line i4 is established through the
at a point somewhat below the upper end of the
compartment D."
valve unit lid when the latter is at the lowermost
Referring now to the connections and rela
limit of its range of reciprocation; one end of the
tionships established by the valve unit 44 and its
steam line i4, which opens into the chamber 25
associated and attached elements when said body
at a point somewhat below the connection with 50 is moved, by means and agencies operating in a
the line 4l; an exhaust line 48 intersecting the
manner hereinafter to be described, to the upper
chamber wall at a point below the connection
limit of its range of reciprocation and to the po
with the steam. line i4; the end of the steam line
sition sho-wn in Figure 3, it will be seen that the
iii exterior to the housing Iii, which line opens
relative size, disposition and relationship of the
into the chamber at a point below that of com
valve unit elements and attachments hereinabove
munication with the exhaust line 48; and a
set forth is such as to position the plate 46 above
branch steam supply line ¿i9 leading from the
and in unobstructing relation with the port or
supply line «il to open into the chamber just
ports 2Q; todispose the compartment A in regis
above the housing top closure and at a point be
tration with the DO'rt or ports 28 and ín COmmu
low the connection with the line l5. These con 60 nication, through the latter, with the interior of
nections and their altitudinal relationships de
termine in large measure the relationships and
dimensions axially of the valve unit 44 of the
valve Unit sections Ma, Mib, 44o, 44d and 44e
and ofthe compartments A, B, C and D. The
valve unit section 44o constitutes the lower end
portion of the valve unit 44 and is limited in up
ward extent by the zone of reduced diameter
forming the compartment A which separates said
first section from the second section 4Gb in such
me» Y1er as to position the latter across and in
ports 23;
obstructing relation with the port or
said section 44h having an axial length
when the valve unit 44 and attached
is at the lower limit of its range of
the housing I5; to position the section 44h below
the opening end of the line I5, so that a passage
for iniiow of steam >from the line 49 to the line
l5 is provided through the compartment B; to
dispose the compartment C in simultaneous com
munication with the opening ends of the lines I4
and 48, so that a passage to exhaust is opened
from the line i4 to the line 48 through said com
partment C; and to dispose the section 44d as a
70 baffle between the opening ends of the lines I4
thereby inhibiting delivery of steam from
the line 41 to the line i4 and limiting such steam
delivery from said line 41 to the compartment D
75 whereinto said line 41 opens.
AÓne other connection withv the-bore
of the slide» v v
is important to "operationof the ap-l '
paratus, and such connectiontakes the >form of
a water line 5i! ‘adapted to'deliver `watenunder
suitable pressureland atltemperatures at or below
normal, from any suitable source and through
any suitable means and agencies,fto the lower
"ment 52 is at theiupper limit»` of its range of l
» ravel, as'determined by engagement of -theele
inent head`53against the lower end of the valve
unit 44, the> shoulders ¿5| and 52e are separated
and then serve, together with the adjacent walls
ofthe element portion 52h andivalve unit bore,
to deñne a compartment'E interiorly of the valve
portion ofthe slide chamber boreaboveand ad
jacent kthe the upper' end of the retracted ~ unit rand >in position to communicate through
the discharge end of 10 portsl54, opening v'through 4the walls of the valve ‘
unitbeneath the Vvalve unit section 44d, with the
said line 50 opening through the slide chamber
l thermostatic element 3 l ,
compartment C. ` Since the .length of'the valve
wall just above the lower end of the Valve unit
section 44a when the valve unit 44 is at the low~
element portion '52a is such as to position the
upper end of said portion in coplanar'rel'ation
er limit of its range .of reciprocation, asshown
in Figures 1 and 2,"and in -position tobecovered
and obstructed by` said' section' Ma when the
plate 46 is seated-against the plug 2t, which ar
rangement locates the discharge endV of said ìine
5t to be uncovered and >free for delivery of water
to the slide chamber bore when the valve unit 44
with the upper end of the valve unit 44 when
the element 52 isV at» the upper limit-of its ,range
of travel relative to said valve unit, the upper
endqof saidportion- 52a, is retracted within’the
' valve unit bore when the element 52’is'at ythe
; lower» limit of its range ofv travel, such retrac
tion'serving to open andk uncover ports 55, inter
is moved tothe otherlimit' of its »range vof re- ,
secting the kvalve unit walls just beneath the
ciprocation, as shown in Figures Brand 4,
The valve unit ‘i4 is longitudinallyv traversed by
valve I.unit section 44e, to establish communica
tion between the -compartment D and the open
an axial bore which opens through vboth endsv of
upper en'd ofthe valve unit bore; it being obvious
said' body and includes portions of lesser vand
greater diameters providing a shoulder 5lv where 25
~ thatthe ports 55 are closed by the element por
tion 52a whenv the element >52 is at the upper
they meet. The bore portion ofglesserÍdiameter
limit of its range of r,reciproc'ation> within the
traverses the lower portionandopens through
valve unit.
the lower-'end of the> unit 44" and the bore por
~ The valve'element 52` is formed with upper and
tion of greater diameter traverses the upper por
tion and opens through the upper end of saidy 30 lower axial bore sections 55 and 5l, respectively,
separated bymeans of a baille 58 obstructing said
valve unit, and the `shoulder 5| is disposed in
bore sections somewhat -below the element shoul
approximately theplane ofthe upper margin of
der'52c. 'I‘he upper bore section 56 extends up
the valve‘unit section 44e. The> bore just above
described houses andslidably'mounts for lim 35 wardly from the baille 58 to open through the
upper end of `>the element 52 and the lower bore
ited axial reciprocation a two-diameter, cylin~'
section 5l? extends downwardly from said baffle
drical valve element 52, whereof the portions of
5B to the head -:5_3 closing the lower end -of said
different diameter Iit closely and slidably withinA
element-‘52. Ports 59 intersect the walls of the
the bore portions of corresponding size. The
Valve element portion 52a just above the baiiie
portion of the valve element 52 of greater diam
eter is designated 52a andis adapted to slidably 40 58, »so’fthat communication may be had there#
telescope within the upper, greater-diameter
portion of the bore within the valve unit 44 and
be thus positioned interiorly of and for limited
axial reciprocation relativeto the portions of the
valve unit forming -thel compartments C‘ and D,
while the valve element portion of lesser diam
eter is designated 52h 'and is shown as >adapted
through between vthe lower end of the upper bore «
section 55 and the compartment -E >when vthe
element 52 is at the upper limit of its range oi.E
reciprocation within the `valveunit 44, and simi
lar ports 60 intersect theV walls of the element
portion 52h just below the baiile 53 to establishA
communication between the upper end .of the
lower bore section '51»and the compartment E
when the element 52 is positioned as above
lesser-diameter portion ofl the valve unit bore
for limited axial Íreciprocation relative fto and 50 stated, the baffle 58 being hence »so located in the
element 52 as to lie above> the shoulder 5l and
interiorly of the valve junit portions formingthe
thus permit vuncovering of theports A(il) when the
end section 44d and the compartments A and' B.
element 52 is in the relative position shown in
The shoulder 52e" formed at the junction ofthe
Figures 2 and 3. Suitable ports 6i open through
valve element portions 52a and 52h is adapted
to engage at times againstfthe >shoulder 5l of the 55 the lower end of the lower element portion 52h
just above the head 53 and in position to be un
valve unit 44 and limitV relative ltravel of the
covered when the element 52 is at the lower limit
element 52 downwardly of said valve unit, and
of its »range of reciprocation relative to the valve
the length of the` valve element
portion. 52h is‘
unit 4,4,Aand other ports or Iapertures 62 intersect
such as to provide an extension vof said valve
element portion, terminating in ahead or exe' 60 intermediate »portions-of the walls of `said element
portion '52h Yin vposition to register withports 63
terior annular flange5 , axially of and outwardly
in the valve unit walls «between the valve unit sec-’ ,
ï beneath and beyond‘the lower end of the valve
tions"44a and44b and rthus establish communi
e unit section 44a when the shoulders 5l and 52e
cation between the bore >section 51 and the com#
are engaged and the element `52` is at the ‘lower
limit of its range of travel relative to the valve 65 part-ment A when the element 5_2 is at the upper:
limit of itsrange of >_relative recip'rocation;r
unit. The valve element head 53 _is adapted to
The'lower end ofthe valve element 52k bears
engage at times against the-lower end of the
against and 'is secured 'in yanysuitable manner
valve unit 44 and thereby limit upward travelto the upper end of the thermostatic element 3l;
ofthe element 52 relative to said-valve unit, and
f the length of the element portion 52a is such as ,o thereby mounting said element 52 _for axial djs
to »bring its upper end into Acoplanar relation 7 - placement determined ‘by expansion and retrac
tion ofthe said element 3 I .
with the upperl end vof the valve unit 44 when
to slidably engage within and throughthe lower,
said element 52 is at the upper limit of its range of travel within said valve unit. >When the ele
The elements' thus far described, in the _oper
ative relationships vset forth, constitute a fully au
tomatic device operable to feed water to an op
ing enters the lower portion of the slide chamber
25 through the uncovered portion of said port or
erating boiler IDD for maintenance ofithe water
level in said boiler. The device, constructed and
ports and acts, because of its high temperature,
assembled as Ishown and described, is mounted
to expand the thermostatic element 3| with con
in ñxed position, with the axes of the barrel II
sequent upward travel of the upper end of said
and slide chamber 25 vertical, adjacent the boiler
element and the valve element 52 associated
IUD to be served thereby and is so disposed alti
therewith. As the valve element 52 starts its up
tudinally as to bring a horizontal plane intersect
ward travel within the Valve unit 44, `the shoul
ing the port or ports 29, indicated by the broken
ders 5I and 52o 'separate to develop the com
line L-L in Figure 1, into coincidence with the
partment E and the ports 59 and 69 are uncovered
water level to be maintained in the boiler; the
and placed in „communication with said compart
lines 23 and 41 are suitably connected with the
ment, thus establishing a vent passage from the
steam dome IGI or other steam Isupply at the
lower end of the slide chamber 25, through ports
boiler; the line 24 is operatively connected »with
5I, bore 5l, ports 6D, compartment E, ports 54,
a supply of boiler feed water (preferably heated)
and compartment C, to exhaust line 48, so 'that
under pressure, and the line 5D is connected with 15 any resistance to the flow of steam from the hous
a> pressure supply of unheated water; and so
ing lil intothe lower end of the Islide chamber
mounted and connected the device is ready for
is fully obviated; and at the same time an eX
haust passage is established from the upper end
automatic operation.
Assuming as an initial condition that the reser
of the slide chamber 25 through the ybore 56, ports
voir deiined by the housing i0 is substantially
59, compartment E, ports 54, and compartment C,
filled with feed water and that unheated water
to exhaust line 48, so that steam pressure pre
supplied through the line 52 has cooled and con
viously obtaining in the upper end of said Islide
sequently contracted the thermostatic element 3i
chamber may be relieved through such exhaust
to permit positioning of the valve unit 44 and
passage and resistance to upward travel of the
element 52 at the lower limit of their range of
valve unit 44 and element 52 minimized. Con
reciprocation, as shown in Figure l. With the
tinuing expansion of the element 3! operates to
various elements positioned as shown in the iigure
move the element 52 upwardly within the valve
last noted, steam at boiler pressure i's supplied
unit 44 until the upper limit of such relative re
through the line 4'! to compartment D whence
ciprocation is reached and the elements are in
it is free to pass through the now uncovered ports 30 the relationship shown in Figure 2 with the
55 and open upper end of the valve unit bore into
upper end of the element 52 coplanar with the
the upper end or" the slide chamber 25 and through
upper end of the valve unit 44 and the head 53
the line 4I to the valve-actuating pressure cham»
engaged against the lower end of the valve unit
bers 38 where such pressure actuates the dia
section 44a, in which position the ports 55 are
phragrns 39 to close the valve 35 and open the 35, closed to prevent further admission of steam
valve 43, thus closing the line 34 and opening
from the compartment D to the upper end of the
the by-pass 42, while the pressure thus developed
slide chamber, the exhaust passage from the up
within the upper end of the slide chamber acts
per end of the slide chamber to the exhaust line
against the upper ends of the valve unit 44 and
4B remains open for kescape of pressure iro-m the
valve element 52 to seat and hold said members 40 slide chamber upper end and line 4I communi
at the lower limit of their range of reciprocation
eating therewith, for consequent opening of valve
with the plate 45 closing over the upper ends of
35 and closing of valve 43 and resulting reestab~
the pipes 32, the port or ports 25 open and unob
structed, the valve unit section 44h in closing re
lation with the po-rt or ports 28, the ports 54, 59,
5E] Vand 52 closed, and the ports 5I exposed and»
opening into the slide chamber bore beneath the
valve unit 44; now through the line 5i) being cut
ofi by the valve unit lower section 44a. Since
the line I4 and its branches I3 is now in corn
munication with compartment D, steam from said
compartment may and does iiow through said line
and branches to the opposite ends of the barrel
lishment of Iwater ñow through the supply line 34,
and ports SI are obstructed to close the vent pas
sage therethrough and thus add the pressure
eiîect of steam within the lower end of the slide
chamber to the forces tending to move the valve
unit 44 upwardly within the slide chamber. Fur
ther expansion of the element 3I, aided by the
50 pressure of the steam within the lower portion of
the slide chamber and the pressure oi water in
flowing through the line 34 against the lower sur
face of the plate 46, operates to shift the valve
unit 44 upwardly oi the slide chamber 25 and to
II, where the pressure of the steam acts »to hold
the spool valves I8 at the inner limit of their
the upper limit of its range of travel while main
range of travel, with their studs 22 in end engage
taining the element 52 at the upper limit of its
ment, and in position to establish a path for steam
relative reciprocation within said unit, and to the
ñow from the line 23 through the ports i5 to the
relationship of elements shown in Figure 3. Dur
interior of the housing I9 above the level of the
ing travel of ,the valve unit 44 upwardly within
feed water therein, and a path of water flow out 60 the slide chamber 25, the valve element 52 is held
wardly from the housing through the ports I1 and
in closing relation with the ports 55 and with
line 24, any pressure-induced tendency of the
its ports 55 opening to the compartment E, so that
valves I8 to separate being obviated by the corn
the Vent passage from the upper end of the slide
munication between the line I5 and exhaust line
chamber to and through the exhaust line 4c re
48 established through compartment Cl Since
mains open for relief of pressure in the said upper
the pressure on the water within the boiler Iûil
end of the slide chamber and in the line 4I, thus
and on the reed water within the housing Ii) is
maintaining the valve‘36 open and thev valve 43
now balanced, the feed water in the housing I0,
closed for inflowof water to the lower end of the
standing at a higher level than the water in the
slide chamber through the line 34. With the
boiler, is free to flow into the boiler through the 70 valve unit 44 at the upper limit of its range oi
line 24 until the levels coincide.
travel, the compartment D is positioned to re
When, due to transfer of feed water from the
ceive steam discharged from the line 41, which
housing I5 to the boiler, the feed water level in
steam, because of-lack »of any outlet from said
the housing drops suf?ciently to uncover a por
compartment, is trapped and held therein; the
tion of the port or ports 29, steam from the hous
2',41 1,589
compartment C isy placed in ¿communication with.
tion with the'upper ends ‘of- the pipes 32; and the
the lines I4 and 48 so that pressures obtaining
elements of the deviceare returned to the rela'««
Y tionships shown in Figure l, readylfor automatic
repetition of ktheir operative cycle.> `
' in the ends of the
barrel! l, branches i3 and line
I4 may be relieved‘through the exhaust passage
thus e'stablishedto and Vthrough said exhaust line
48; the compartment >Bis, placed in communica
vIt is‘reco’gnized that thereÍp‘robably will -be
some leakage of steam'pressures along the walls,>
tion with the line i5 and branch steam line 49, so
that »steam under pressure ini'lowing through the
branch 49 may pass through compartment B and
of the barrell l l .and slidechamber 25 past the
wall-engaging elements of the valves i3 and valve
line vlato the space between the spool valves it’ 10 unit 44,V but itis to be noted that such leakage
will ybe; -infevery position of the valve elements,
. and` shift said valvesto their respective outer ends
froma high pressure zone >toa region', area or
of the barrel i Lowhere they are pressure-held in
f compartment in ‘communication
position to obstructpcommunication between the `
withthe exhaust
lines 23 and, 24 and the interior of the housing i5;
line 48, vso that such leakage can in :no’instance
the Compartment A is placed in registration with
. be productive ofv operation-nullifying adverse or
' the port or ports „23, so that pressures obtaining` 15
back pressures.r
„ I
As will `be apparent .from the foregoing, the den
vice thus far described is susceptible of normal,
exhaust passage’thus established through. said
fully-automatic operation throughl a repetitive
port or ports 28, compartment A, registering ports
cycle to feed Water to an operatingl boiler for
62 andf63, bore 51, ports 66, compartment E,
ports 54, compartment C, and exhaust line 48; 20 maintenance of a determined water level therein.
However, as a safe-guard against possible abnor~
the valve _unit end section 44a is. lifted o-ut of
malities, 'such as operative' failure or rupture of
covering rrelation with the discharge end of the
withinthe housing i 0 may be relieved through the
line 56, thus permitting inflow of unheated water
the thermostatic elementr 3i, auxiliary means is
to the slide chamber portion surrounding the
pi'ovidedto warn` of .the'abnormal condition and
25 to continue supply. of feed water, .though at a
thermostatic elementl 3 i; andthe plate 46 is posi
tioned above the port or ports 29 to permit free
inflow of feed water from/the line-34, through
slowerrrate, to. the boiler served by the device.
v.The auxiliary means is illustrated as. including
the pipes 32 and lport or ports 29 to the interior
a by-pass liiow line 64'¿in closely-spaced, parallel
of the housing Il). y
relation with and below the bottom'closure of
the vhousing lû and opening »at one end through
said bottom closure and into the interior of said
housing; the other end of the line 64 opening up
wardly within the lower end of a. vertically-l
With the elements of the device positionedl as ~
shown in Figure 3, feed vwater delivered through
the line 34 rises and accumulates within the reser
Voir delined bythe housing l ii, there being now no
disposed, straight tube 65 of material having a
steam or entrapped air pressure within said hous
ing to impede the inflow of water, while iniiow of 35 relatively-high coefficient of thermal expansion.
The tube 65 is ñxed at its lower end to the closed
unheated water through the line 5B to the rspace
lower `end of, and is housed in spaced, axially
about the element 3l operates to cool and con
coincident relation within, an imperforate stand
tract said element with consequent downward
pipe 66 which connects at its upper end with and
travel of the associated valve element52 relative
to the valve unit 44, the latter lbeing held at the 40 is closed by a valve fitting 6'! through which the
upper limit of .its range of travel during this phase
steam line-_41 serving the upper 'end of theslide.
of operation by pressure of the incoming feed
chamber 25 communicates. The fitting 61 de
water against the under surface of the plate 46. .
Initial contraction of the element 3l»` draws the
attached'valve element 52 downwardly within the
fines an interior chamber F spaced somewhat
above the upper end ofthe stand-pipe 66, and
said chamber is formed with opposed, conical,
valve seats 68 and 69 in its upper and lower walls,y
gage, and to the relationship of elements shown ~ respectively, and in axial coincidence with the
in Figure 4, in which position the ports 59 and
projected axis of the‘tube 65. rThe supply por
60 are obstructed and closed, thus closing the
tion of the steam line 41 opens into the chamber
exhaust passage from the upperend of the slide ‘ 50 F through the valve seat 68, and the extension of
chamber 25, and the ports 55 are uncovered tov
said line 41 connects between any suitable point
permit steam flow from compartment D, fedv by
of the chamber sidewall and the interior-of the
line 41, into the upper end of the slide chamber
' slide chamber 25 in the relation with the latterr
and line 4l opening thereinto, the vpressure thus
previously described. A double-acting valve plug
developed within line 4l operating 'to close valve
‘lo is housed within the chamber F and is formed
36 for interruption of feed water now through
with upper and lower, conical end portions
line 34 and opening valve 43 controlling the by
adapted to selectively and respectively seat and
pass 42. '
close against the valve seats 68 and 69, the plug
As the element v3l continues t-o contract, the ’ . 'i0 being of a length less than the spacing between
downward pull thus exerted on the valve element 60 said seats,v so that when the yplug is closed against
52 acts through the engaged shoulders Si and
one of the seats, the passage communicating
52e to move the valve unit 44 downwardly against
thro-ugh the other seat is open. When the tubeA
65. is contracted to its length at normal tempera
the pressure of the> feed water below the plate 46,
tures, the upper end of said tube is spaced below
and the pressure of steam now present inthe
upper end of the slide chamber and acting against 65,. the upper end of the stand-pipe 66 and adjacent>
portion of the» fitting 61 such a distance as willv
the upper ends of the Ysaid unit 4.4 and valve ele
ment 52 assists downward travel of the saidk unit " ,allow for f linear expansion of said tube when
heated to the temperature of the boiler steam
and'element to the extent necessary to fully over
without engagement of the tube endagainst the
come any water resistance developed against the
plate 45 and to force any feed water entrapped 70 fitting. The lower wall ofthe fitting 61 is inter
sected by a straight, two-diameter bore in axial
within the lower end -ofthe slide chamber beneath
alinement with the tube’65 and valve plug 10, the
said plate back through the pipes 32, fitting .33,
greaterf diameter portion of said bore opening
valve 43 and by-pass 42, until said plate 46 is
through the valve seat 69 and the lesservdiameter
again seated against the plug 25 in closing rela
valve unit 44 until the shoulders 5l and 52c en
75 portion of said bore opening into-the upper-1 endv
An exhaust passage being now open, as above
of the stand-pipe 65, and a stem 1I is slidably
mounted in and for axial reciprocationv relative
to said bore in rigidly-connecting relation be
tween the valve plug 15 and upper end of the
tube 65, the length of said stem 1i being such
described, between compartment D and exhaust
line 45, steam pressures previously obtaining in
the upper end of the slide chamber 25 and line
and branches I4, i3 are relieved and the inflow
of feed water against the under surface of plate
as will serve to seat the lower end of said plug
45 acts to lift said plate, together with the as
sociated valve unit 44 and element 52 upwardly
within the slide chamber 25 and to the relative
10 position of said unit and element shown in Fig
which steam may flow between the sections of the
ure 4, any resistance to upward travel of the valve
line 41, when the tube E5 is contracted toits
unit 44 being obviated by the passage open from
length at normal temperaturesand seat the up
the upper end of the slide chamber 25 through
per end of the valve plug 10 firmly against and
ports 55, compartment D, fitting 51, and branch
in closing-relation with >the valve seat 68, thereby
line 12 ‘to the exhaust line 48. With the valve
obstructing iniiow of steam from the supply sec
unit 44 elevated to and held in the position
tion of the line 41 to the compartment F while
shown in Figure 4 by the pressure of the inflowing
firmly against and in closing relation with the
valve seat B9, and thereby open a passage through
the valve seat 68 and compartment F through
opening communication through the valve seat
59 between said compartment and the bore por
feed water against the plate 46, compartment B
tion of greater diameter, when the tube 65 is ex
tended in response to the effect thereon of higher
cation with lines I5 and 49 so that steam from
of said unit is placed in simultaneous communi
the latter, which is connected with the supply
portion of line 41 in ley-passing relation with
fitting 51, may flow through compartment B and
line I5 to the interior of barrel II between the
adjacent inner ends of the valves I8 and urge
said valves apart and to the position shown in
Figurefl, so that said valves obstruct and close
temperatures. The bore portion of greater diam
eter beneath the valve seat 69 is operatively con
nected by means of a branch line 12 with the eX
haust line 48, and a suitable flow line 13 connects
said bore portion with a steam whistle 14, or
like signal or signal-actuating device, so that
warning of the presence of steam under pressure
in the bore portion of greater diameter may be
off inflow of steam through the line 23 to an
outflow of water through the line 24 from the
housing Ill. The line I4 and branches I3 being
automatically given.
The auxiliary means illustrated and above de
in direct communication through compartment
scribed is designed to function when the level of.
feed water within the housing Ii! falls, because
of any operative failure or mal-functioning of the
device, below the minimum level determined by
the location of the by-pass flow line 64, During
normal operation of the device, the feed water
C with exhaust line 48, there is no resistance to
travel of the valves I8 outwardly within the
barrel II.
With the elements of the apparatus positioned
as shown in Figure 4 through the agencies and
operations hereinabove described, the plate 45 is
disposed above the port or ports 29 and feed water
level in the housing IQ will rarely, if ever, drop
below the line L-L of Figure l, regardless of the
from the line 34 may freely flow into and rise
water level in the boiler, since as soon as any
40 within the reservoir of the housing I9, the only
portion of the port or ports 29 is uncovered,
steam from the interior of the housing will enter
the lower portion of the slide chamber, expand
possible resistance to such charging of the reser
voir being the pressure of steam entrapped there
in. T0 obviate any adverse effect of such en
the element SI, and promptly initiate inflow of
trapped steam, a vent passage therefor is pro
water to the housing from the line 34. However,
vided through the valve element 52, which pas
should the element 9| fail to respond to the
sage is illustrated as including a central aperture
steam temperature, the movable valve elements
in the baffle 58 between the element bores 55 and
of the device will remain in the relationships
51, and a check valve, such as a ball 15 yíeldably
shown in Figure l, wherein the tube 65 is con
spring-urged downwardly into normal closing
tracted to hold the valve plug 19 in closing rela
relation with and against the upper end of said
tion against the seat 59, until the outflow of feed
aperture, controlling passage through said aper
water from the housing through the line 24 un
der the balancing pressure of steam inflowing to
said housing through the line 23 lowers the feed
ture in a manner to permit transfer -of fluid
under pressure from the bore 51 to the bore 5E,
while inhibiting such transfer in the opposite di
water level in the housing to such a degree as
rection. With the arrangement shown, steam
will permit the steam in said housing to back 55 from the housing I0 may pass, when the ele
the water trapped in the by-pass line 54 into the
ments of the apparatus are in the position shown
tube 65 and thence, through ports 15 opening
in Figure l and after the tube 55 has expanded
through and adjacent the ends of said tube, into
to position the valve 19 as shown in Figure 6,
the stand-pipe 55, thus opening a passage
into the lower portion of the slide chamber 25
through which the steam may enter said tube 60 through the port or ports 29, thence through the
and stand-pipe. When subjected to the higher
ports 5l to the bore 51 of the element 52, through
temperature of the steam, the tube `55 extends
the aperture of the baffle 58, lifting the valve ball
upwardly, lifting the plug 15 from the seat 59 and
15, thence through the bore 5'5, ports 55, com
closing said plug against the seat 68, thus cut
D, and exhaust passage through the
ting off supply of steam through the line 41 to 65 fitting 51 to the line 4S. After the valve unit 44
compartment F and opening'an exhaust pas
has been lifted to the position of Figure 4 and
sage through said compartment, valve seat 69,
incoming water has risen above the port or ports
branch line 12 and exhaust line 48, wherethrough
29, the ports 53 of the valve unit being now in
pressures obtaining in compartment D, the upper
communication with the ports 28 of the slide
end of slide chamber 25, line 4I, and line I4 with 70 chamber, a vent passage for the entrapped steam
its branches I3, may be relieved. Drop ofpres
may still be provided through said ports 28 and
sure in line 4I results in opening of valve 36 and
53 by upward elongation of the ports 62 of the
closing of valve 43 with consequent Vinflow of feed
element 52 as indicated by broken lines in Figure
water through the line 34 against the under sur
4, wherebysaid steam may pass from the upper
face of .plate 45.
_` portion -of _ the housing, minne the bere 51 and
thenceescape to exhaust along the path above
With the valve unit44 elevated by pressure _
of the infiowing feed water, the discharge end of
the line 50 is >uncovered to permit inflow, of Water
through said line to the slide _c_hamber'25 below
said valve unit,_thereby enhancing therate at
rwhich the housing v_l D is charged with feed watengf
Should it be the thei'rnostatic element 3l thatis 10
inoperative, inflow of cooling water through the
line _50 has no elfect on the position of the valve
unit 44 and element 52, and supply of water to
„Elevated temperature steam charge òfsaid
2. A__boilerwaterfeed device comprising, a feed
-Water _reservoir disposed for coplanar relation of
its _minimumcontentslevel with the desired _boil
er water level, steam and water flow lines com
mllnïâeliïlg between Saidreservoìr _and the _boiler
_ to _be served,__feed_w_ater _inflowmeans serving said
reservoir, kI_)ressure-actuatable -valves controlling
Said .ñQWelineS and Said ,ïniïow means, pressure
lines serving said valves, a compound slide valve
_ shiftable to direct 'and regulate ñoW through `said
pressure lines, and _temperature-responsive means
the reservoir of the housing IU continues until
_reactive to direct _contact with the reservoir steam
the tube__6_5 cools and contracts sufficiently to
and feed water charges to shift said slide vvalve
move the valve 'I0 to its _normal‘operating posi
tion shown in Figure 1 and _intoopeningrelation YVand ,thereby position Said pressure-mumble
valves for maintenance of the .water-_charged res
withthe steam line 4_1, whereupon steam is again
permitted to flow through the sections of said,_____, _ ervoir in pressurefbalanced, gravity-ñowrelatíon
line and into compartment ,_D, thence throughthe 20 _with said boilerand to‘alternatively recharge said
reservoir with feed Water as a consequence of
open ports 55 and open upper end _of lthe valve
minimum- contents level therein.V
_ _
_ _ _
unit into the line 4I,_wher_e the pressure of said
_steam serves to close the
_ _valve '36 and open the
_ _ 3. A boiler water feed device comprising, afeed
valve _43. The steam pressure inthe -upper end of 25 water reservoirdisposed for coplanarrelation of
_its minimum contents level with the desired boil
the valve unit 44 _acts to urge said unit down
wardly Within the slidechamber and to the posi
tion of said unit shown in Figure 1, thus reestab
_lishing the connections
and relationships oper
able to shift the valves l 8 inwardly of their barrel
Il for iniiow of steam to the housing 'I0 through
the line 23 and outflow of water from said hous-
_er water level,__steam and water flow lines com
municating, respectively, between upper and low
_er portions of said reservoir and the boiler to
gbe served, _pressure-actuatable valves controlling
_iiow _through _said_lines, pressure lines selectively
„_ serving said valves _for simultaneous positioning
ing -and to theboiler throughthe line 24, thus
completing the operative cycle o_f the apparatus.
vShould no correction of the malfunctioning of
`the device be immediately forthcoming, the de
vice would continue to supply feed water to the
boiler at a somewhat> retarded rate, and would
repetitiously actuate the warning signal, in the
_manner above _set forth, thus- safeguarding
against dangerously rapid lowering'of the Water
level within the boiler.
As is indicated in the drawings, booster de
vicesof injector t Me, _conventionally illustrated
at 'l1 and '18, may be operatively associated with
thereof in_either open `or closed relation With
their respective flow lines, feed water iniiow
means Vserving said reservoir, a pressure-actuat
able valve controlling said inflow means,‘a pres
Vsure line serving said latter valve, a compound
slide Valve shiftable to direct and regulate flowv
>vthrough said pressure lines and temperature-re
sponsive ~means reactive to direct contact with
>the reservoir steam and feed water charges to
_shift said slide Valve and thereby position the
-pressure-actuatable _ valves for maintenance ‘of
the waterfcharged reservoir in pressure-balanced,
Vgravity-flow relation with said boiler and -to al
the lines 24 and 5_0, respectively, and suitably 45 ternatively recharge said reservoir withfeed wa
_ter as a consequence of minimum contents level
suitable manual controls, not shown, in a com
connected into steam supply circuits through
mon manner _ to enhance 'and stimulate iioW
through said lines, when and as desired. _
_ _ _4s A boiler water‘feed device comprising, a feed
waterreservoir disposed for coplanar relation of
lSince many changes, variations, and modifica 50 its minimum contents level with _the desired
tions in the specific form, construct’on and ar
boiler water level, av steam pressure flow line con
necting Abetween the _upper vportion of said 'res
rangement of the elements ~shown and'described
ervoir and the boiler to be served, a water flow
may be had'without departing `from the spirit
lineeonnecting for'gravity flow ofwater be
of my invention, I wish to `be understood _as being
limited solely by the scope of the appended 55 tween the lower portionof said reservoir and the
boiler to be served, pressure-shiftable valves con
claims, rather than by any details of the illustra
tive showing and foregoing description.
I claim as my invention:
1. A boiler. water feed device comprising, a
trolling iìow through said lines, pressure means
common to and serving bothfsaid valves for si
multaneous positioning thereof in corresponding
feed water reservoir disposed for coplanar rela 60 open or closed relation `with their respectively
associated iiow lines, means including a com
tion of its minimum contents level with the de
pound slide'valve actuatable as a consequence of
sired boiler water level, steam and water flow lines
minimum contents level in said >reservoir-_toad
communicating between said reservoir and the
just said pressure -means `'for Asimultaneous _ cios
boiler to be served, means for iniiowing feed wa
ter to said reservoir, pressure-actuatable means 65 ingof b’oth‘said fiow lines, means for the auto
maticfiniiow’of waterto said reservoir while said
and controls alternatively positionable to main
iiow lines are closed, _and'means operable_-in_cor~
tain the water-charged reservoir inv pressure-bal
relation withsaid water inflow to automatically
anced, gravity-flow relation with said boiler and
shift said slide valve and thereby readjust‘said
to'recharge said reservoir with feed water,> a com
pound slide valve shiftable to directand regulate 70 pressure meansj‘for interruption of said inflow
and to simultaneously open both said flow lines
110W of ñuid under pressure to'said pressure
when the said reservoir is water-charged, _
actuatable means, a temperature-responsive ele
- ' 5. In a boiler water feed device having a feed
ment in positioning relation with said slide valve,
water reservoirgdisposedîfor coplanar relation of
and means reactive to minimum'reservoir con
minimum contents level with the'desired boiler
tents level for exposing said element directly to 75 its
water level and means fn» Hm than“, „c mL--A L»
yond the reservoir and include an heat-extensible
element 'arranged forl reaction to the steam in
said reservoir'wh'en the water/level therein lsub
said reservoir, means for establishing pressure
balanced, gravity-flow communication vbetween
saidV reservoir and the boiler to be servedv and
sides to a predetermined minimum, a compound
valve assembly shiftably associated with said ele
ment, and exhaust, ‘pressure flow, and pressure
alternatively closing said communication during
iniiòw'of water to the reservoir, said means 'com- Y
prising a straight, tubular, closed barrel verti- "
supply lines opening into said slide >chamber for
cally intersecting and extending at each end be
automatically variable operative interconnection
yond said reservoir, a steam flow line connecting
through the agency of said valve assembly.
10. In a boiler water feed device having a feed
between the upper barrel ‘extension and the boiler,
a'water flow line connecting
,1.0 water reservoir disposed for coplanar relation of
between'the lower|
its minimum' contents levelwith the desired boiler
barrel extension and the boiler, ports intersect-"
ing the barrel walls interiorly and closely adja
centfthe top and bottom walls of the reservoir,
separate, like valve members slidably cooperat
ing with
opposite portions
of said barrel to open
through said barrel between eachL
lines and the ladjacent barrel ports
water level, steam’a'n’d water flow lines between
said reservoir and the boiler toy be served, simul
taneously-actuatable',"pressure-responsive valves
correspondingly controlling flow' through said
lines, means for the' inflow of feed water to said
reservoir, a pressure-responsive valve controlling
»ofA said flow
said inflow meansandpressure flow lines serv
whenv said valve members vare at the inner limit
of their'range of travel relative to said barrel and
ing _said valves, means automatically operable as
' water level vin said
to close 'communication between said lines and ,20, `a consequence of minimum
their adjacent ports'when said valve -members are
at the outer limit of their range of travel, pres
sure means selectively operable to simultaneously
positionl said valve members'at one or the other
of their limits of travel, a pressure-actuatable
lreservoirto close sai'dïreservoirsteam and water
now lines and open` said inflow'means and to sub
sequently open said'reservoir steam and water
valve controlling said water inflow means and' '
temperature-responsive means and associated
controls automatically operable as a consequence
of minimum contents level in said reservoir to
flow lines and close said inflow means when the
reservoir is ‘water-’rhargedf‘said means compris
ing a slide chamberaltitudinally traversing and
projecting upwardly beyondsaid reservoir, an
heat-extensible- element in"the`_‘lower portion of
said chamber, ports inthe lowerslide chamber
position and hold said valve members at the 3.0 wall eiáposible at minimum reservoir water level
outer limit ‘of their range of travel and to simul
to permitpassage'of steamfrom said reservoir to
taneously'op'en'a path for water inflow through
the slide chamber portion housing said element,
said pressure-actuatable valve >and tosubsequent
a compound valve assemblyslidably cooperating
with the upper‘slide chamber portion and shift
ously shift said valve members to the inner limit 35 ably associated with said element, connections be
of their ‘range of travel when said reservoir is
tween said pressure'ñow lines` andthe upper slide
1y close said water'inflow path and >simultane
6. Apparatus as set forth in claim 5 wherein
chan‘iber` portion, Aa pressurefsupply line, an eX
haust line, and aV cold water supply line serving
said valve members are of double-spool type and -lO
saidfslide chamber, and means inherent in the
mediate'annular rib adapted -to slidably coact
with the barrel walls, and cylindrical sections oí
consequence of element extension'to intercon
‘neetl said` pressure flow, pressure supply, and eX
each includes annular end heads and an inter
reduced' diameter connecting'between said rib
valve assembly' construction Hpolsitionable as a
haust'lines for 'closing of said` reservoir steam and
and heads, Ywhereof the section` disposed out
water flow lines, opening of said water iniiow
wardly vof the' barrel has a lengthadequate' to ,_
means, and toestablish inflow through said cold
bridge- over the space between its associatedA flow
line and adjacent barrel port.
'7. Apparatus a's set forth in claim 5, wherein
water‘ supply vlinepand alternatively positionable
as a consequenceof element contraction to re
verse the ‘flowrelations previously established.
said pressure'means‘ includes a branched pres
1,1. Apparatusas fsetforth'in'A claim 1_0, wherein
sure line opening ‘through and simultaneously au the pressure flow, pressure supply, exhaust, and
serving oppositel ends of the barrel and alter
'cold water` supplylinesopen through the slide
natively conne’ctible with a pressure supply line
chamber walls> in altitudinallywspaced relation
'the valve assembly
or'an 'exhaust to atmosphere, and a separate
and the means inherent
pressure line serving the midportion of the bar
construction alternatively 'positionable to Yselec
and alternatively e
tivelyinterconnect certain of said lines consists
connectible in flow relation opposite to that of said i
branched line with a pressure supply line or -an
of a pluralityof annular ribs integral with and
spaced altitudinally-- along a' valveassembly unit
in slidable engagement 'with the "slide >chamber
walls to limit andjd'eflne annular compartments
about reduced-diameterïsections ‘of said- unit.
rel between the valve members
exhaust to atmosphere.
8. Apparatus as set -ïorth in claim 5 wherein
said pressure-actuatable valve includes a pressure
chamber, a pressure-reactive element in said
chamber, a plunger >connected to said pressure
reactive element and reciprocable therewith into
12. Apparatus as set forth’ in cl'ai'm‘lO, wherein
the compound valve assemblyv comprises'a cylin
drical, multi-spool type unitiformed with a'two
diameter axial'bor'e, a‘two‘-diameter element slid
and out of -closing relation with a water flow line,
resiliently-yieldable means normally' holding said
pressure-reactive element and associated plunger
' ably’within‘said‘ bore for limited-‘reciprocation
relative to" said’` unit; a head 'on'the lesser' end lof
in open relation of' the latter with the water flow
line, and a pressure flow line alternatively con
said element engageable'atk times with~ the adja
cent end of:said'unit'to.limitxtravel Vof saidele
nectible with a pressure supply line or an ex
ment relative to said unitun' on'e' direction, al
haust toatmosphere ’serving said pressure cham- ”
ternatively registrable openings through the walls
of "said unitI` and element; andi'me'a‘ns" securing
said head'to' the‘upper end ofLthe heat-extensible
9. Apparatus as set forth in claim 5, wherein
said temperature-responsive means vand associ
ated controls' are housed'in a slide chamber alti 75
tudinally Vtraversing- and projecting upwardly ‘be
>13. “Apparatus as set Iforth in claim 1_0, wherein
the vfeed water inilow means delivers through the
lower end of the slide chamber and the com
water to said reservoir, pressure-actuatable, temperature-responsive means and controls auto
matically cooperable to maintain the water
pound valve assembly carries in ñxed association
a plate reciprocable altitudinally of the slide
chamber lower portion disposed to close over and
charged reservoir in pressure-balanced, gravity
obstruct the delivery end of the Water inflow
means when said valve assembly is at the lower
limit of its range of actuation within the slide
flow relation with said boiler and to recharge
said reservoir with :feed water `when the water
level therein reaches its predetermined operative
14. Apparatus as set forth in claim 10, wherein
minimum, and supplementary temperature-re
sponsive means operable to correspondingly con
the feed water inflow means includes a return lo trol said pressure-actuatable means in response
water flow line connected with the inflow line in
to a lowering of the reservoir water level beyond
by-passing relation with the pressure-responsive
the predetermined operative minimum as a con
sequence of failure or malfunctioning of said
inñow control Valve, a pressure-‘responsive valve
ñrst-named temperature-responsive means and
controlling communication between said return
and inñow lines adjacent the delivery end of the>
latter, and pressure means simultaneously serv
ing both of saids valve for selective actuation
the pressure-actuatable, temperature-responsive
thereof in maintained opposite How-controlling
relation with their respective lines.
15. Apparatus as set forth in claim 10, where
in the cold water supply line opens for discharge
throughthe slide chamber wall above the heat
extensible element and in flow-obstructing re
lation against a lower portion of the slidable
compound valve assembly when said element is
contracted, and is thus positioned and arranged
for automatic delivery of cold water against and
about said element as a consequence of element
extension and resulting upward shifting of the
valve assembly.
16. In a boiler water »feed device having a feed
Water reservoir disposed for coplanar relation of
its operative .predetermined minimum water level
with the desired boiler water level, steam and
water now connections between said reservoir and ,
the boiler to be served, and means for inflowing
17. Apparatus as set forth in claim 16, wherein
means and controls are served by a pressure ñow
line alternatively connecti-ble with a pressure sup
20 ply line and an exhaust to atmosphere, and said
supplementary temperature-responsive means
comprises a valve shiftable to selectively connect
said flow line with said supply line or exhaust,
an heat-extensi-ble element fixed at one end and
connected at its movable end with said valve to
close said exhaust and open communication be
tween said flow line and supply line when said
element is contracted and to close said supply
line and open communication between said ñow
line and exhaust when said element is heat-ex
tended, and means exposable through lowering of
water level in the reservoir below a predetermined
operative minimum to conduct steam from said
reservoir to and for heating elîect on said ele
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