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Патент USA US2133599

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Oct. 18, 1938.
Filed Oct. 16, 1935
3 Sheets-Sheet 1
Oct. 18, 1938.
|___ L, TURNEY
Filed Oct. 16, 1955
5 Sheets-Sheet 2
Oct. 18, 1938.
Filed Oct. 16, 1935
3 Sheets-Sheet 5
\ |
17 II
I Patented Oct. 18, 1938
Lee L. Tumey, Muskegon, Mich., assignor of one
half to William M. Tippett, Muskegon, Mich.
Application October 16, 1935, Serial No. 45,227
2 Claims.
My invention relates to humidi?ers, and es
pecially humidi?ers used in connection with hot
air and radiator types of domestic heating
One object of my invention is the supply of
Water vapor to the space being heated, in quan
tities and at times automatically regulated sub
stantially in accordance with requirements for
maintaining a uniform degree of humidity there
10 in, and preferably without recourse to hygrostatic
control apparatus. This objective I realize in
general by the use of a small boiler exposed to
the combustion chamber of the heating furnace
or boiler.
Water vapor in the form of steam
[5 generated in the boiler is supplied to the dis
charge ducts of the furnace or to the air stream
across the radiator, as the case may be.
humidity drop in heating intake or in?ltrating
outside air up to room temperature, increases in
20 general as the outside temperature lowers and
requires increased ?ring. As a result the amount
of water vapor required to maintain a constant
room humidity is substantially proportional to
the quantity of heat (or fuel consumption) re
25 quired by the heating furnace or boiler. The
boiler, which is in the combustion chamber, gen- _
erates steam for humidi?cation at such time as,
and in proportion to, the fuel consumption re
quirement from time to time of the heating plant,
30 and thereby in accordance with the additional
quantity of moisture required for maintaining a
constant degree of room humidity.
For a fuller realization of this objective, I with
hold the boiler from substantial heat conducting
a contact with the water jackets of the boiler or
air jackets of the furnace, as the case may be,
so that the amount of steam generated in the
boiler will be subject only to the fuel consump
tion in the combustion chamber and not lessened
40 by dissipation of heat from the boiler to the
jacket in varying amounts, depending in part
upon the temperature of the water or cold air
entering the jacket.
Another object of my invention is the ready
45 removal of the accumulations of lime and other
sediment precipitated in the boiling of the water.
I prefer to accomplish this object by interposing
a settling chamber between the ?oat chamber,
which controls the feed of water to the boiler, and
50 the boiler where the steam is generated. The
(01. 122-20)
thereof, and it can readily be removed by means
of a bottom closure plate or drain plug.‘ Settling
out of sedimentary matter is preferably furthered
by raising the temperature of the water in the
settling chamber in part by steam communica- 5
tion between the boiler and settling chamber, in
part by heat conduction through the water and
steam conduits, and in part by the return of in
cidental condensed steam to the settling tank.
Another object of my invention is to supply 10.
water vapor to rooms heated by radiators in
such a manner that the water vapor is delivered
where the air is the warmest and thus best able
to hold the water vapor, and in general at such
times as the radiators are warmest, as distin- 15
guished from delivering water vapor during
periods when the radiators are relatively cold.
In this connection I also provide means for re
ceiving and returning to the system any water
vapor which may condense on radiators, and 20
this return is preferably made in such a manner
as not to interfere with the continued supply of
Other objects of my invention are concerned
with an improved ?oat valve for the humidi?er, 25
improved control for the supply of vapor, and
an adjustable mounting for the boiler whereby
its degree of exposure to the heat of the com
bustion chamber may be varied.
The foregoing together with further objects 30
and features of my invention are set forth in the
following description of speci?c embodiments
thereof and illustrated in the accompanying
drawings wherein:
Fig. 1 is a vertical longitudinal section through .35
a preferred form of steam generating vapor unit
of my invention;
Fig. 2 is an enlargement of the left-hand end
of Fig. l to show the details of the ?oat valve;
Fig. 3 is a front elevation of a hot air furnace 40
to which my humidi?er has been applied;
Fig. 4 is a front elevation of a hot water or
steam boiler for domestic heating to which my
humidi?er has been applied, showing also a ?oor
thereabove in cross section with radiators to the 45
air stream of which my humidi?er supplies
Fig. 5 is a plan section through the furnace of
Fig. 3;
major portion of the precipitated matter while
held in suspension by the agitation of the boiling
Fig. 6 is a plan ‘section through a furnace,
similar to Fig. 5, but showing a modi?ed adjust
able mounting for the boiler within the combus
in the boiler, ?nds its way to the quiet of the
tion chamber;
chamber and boiler are so arranged that the
55 settling chamber, where it settles to the bottom
Fig. '7 is a detailed vertical section through the 55
furnace feed door showing the modi?ed mounting
of Fig. 6;
Fig. 8 is a diagrammatic view of a hygrostatic
control for the vapor feed from the humidifier;
Fig. 9 is a view somewhat similar to the upper
part of Fig. 4, but showing a modi?ed arrange-
ment for delivering vapor to the radiators and
returning condensed vapor; and
Fig. 10 is a cross sectional view of a modi?ed
form of steam trap.
Referring ?rst to Fig. 1, which is a detailed
cross section of the humidity generating unit
itself which is mounted with its boiler in the
combustion chamber of the furnace or boiler,
15 the vapor generating unit comprises in general
the boiler I5, a ?oat chamber l6 and a settling
chamber l‘l interposed between the boiler and
?oat chamber, with the boiler mounted within
the combustion chamber and the ?oat and set
20 tling chambers mounted without the boiler or
The ?oat chamber I8 is fed by a water supply
tube l8, the end of which is coupled to a valve
sleeve 49, which in turn is screw threaded onto
a valve body 20 to leave a valve chamber within
the sleeve.
The valve body is in the form of
a shouldered plug which is inserted through a
wall of the ?oat chamber and secured in position
on the wall by a clamping nut 2!. Within the
30 chamber afforded by the valve sleeve I9 is a mov
able valve 22 comprising a valve head which em
braces the backside and peripheral edges of a
live rubber valve washer 23 and is mounted on
a valve stem 24. The valve stem 24 extends
through a central bore 25 of the valve body, wa
ter passage between the bore and the valve stem
provide an over?ow opening [611 through a ver
tical wall of the ?oat chamber of greater capa
city than the maximum inlet to the ?oat cham
ber, which will maintain a water level but slight 25
ly above the level maintained by the ?oat valve.
The settling chamber l1 preferably immedi
ately adjoins the ?oat chamber and communi
cates therewith by registering passages 35 and
36 in the adjacent walls of the ?oat chamber 30
and settling chamber, respectively, which may
conveniently be secured together by tie bolts 31.
Water passing from the ?oat chamber into the
settling chamber passes on through a boiler in
let pipe 38, preferably opposite the passage 36 in 85
the settling chamber, to the lower end of the
boiler l5.
The valve is normally
the valve head and the sleeve 19 and is further
urged to closed position by the pressure of the
45 water from the supply tube I8.
The ?oat actuating mechanism for the valve
comprises a pair of pivot ears 28 on the valve
body 20 for journaling the pivot pin 30 which
passes through the inner end of a ?oat lever 3|
50 of I-shape cross section, the outer end of the
lever carrying a hollow metal ?oat 32. The ?oat
lever 3| is of generally L-shaped form with the
short leg of the L depending more or less verti
cally from the pivot pin and the long leg extend
55 ing more or less horizontally to the ?oat from
sediment which can readily be removed by un~
screwing the drain plug 34.
As an additional precaution against the remote 20
possibility of the ?oat valve failing to close, I
steam discharge pipe 39, preferably parallel with
against the washer 23.
the water therein is relatively cool. A consid 15
erable space is allowed below the working limits
of the ?oat, however, for the accumulation of
nally in the bore. The adjacent end of the valve
urged closed by the spring 28 interposed between
then the sleeve is unscrewed from the valve body
exposing all of the moving parts and the valve
seat. An entire new valve assembly, including
the stem, head and washer, can readily be sub
stituted. This does not require removal of the
cover It’ of the ?oat chamber.
In practice very little sediment will accumu
late in the bottom of the ?oat chamber because
being afforded by slots 28 extending longitudi
body 20 is formed as a valve seat 2'! somewhat
40 rounded in radial section and adapted to seal
the valve is closed by the water level in the ?oat
chamber rising above a predetermined line.
The interior of the valve is readily accessible
for cleaning or for replacement of the washer,
should occasion ever require. The water feed
, tube I8 is disconnected from the sleeve l8 and
the bottom of the short leg. Through the ver
tical short leg of the lever and in substantial
alignment with the axis of the valve stem, an
adjusting screw is theaded and adjustably held
by a lock nut 33' with the‘end of the screw abut
ting the end of the valve stem.
When the water level in the ?oat chamber
drops below a predetermined line, the ?oat, act
ing through the ?oat lever and adjusting screw,
will push against the end of the valve stem with
su?icient force to open the valve against the
pressure of the valve spring and the pressure
of the water in the supply line, and once the
valve is opened, the valve closing force of the
water pressure will be greatly reduced, whereby
something of a snap ‘action is afforded to insure
a maximum opening of the valve which will
avoid the lodgment of particles on the valve
washer. A similar snap action is afforded when
From the upper end of the boiler a
the pipe 38, leads back to the settling chamber
at a height above the water level.
For ease of assembly I provide the usual
unions 40 and 4| for the pipes 38 and 38. These
pipes extend through spaced holes in the furnace
or boiler wall 42 to which they are ?xed by
clamping nuts 43 whereby the boiler is supported 45
in the combustion chamber a predetermined dis
tance inwardly from the wall 42.
Surface extenuating fins 44 are integrally cast
into the bottom portion of the boiler and a clean
out plug 45 is provided at the end of the boiler.
The settling chamber l1 serves the manifold
purposes of carrying water from the ?oat cham
ber to the boiler, of aiding in precipitating some
of the lime or other precipitable matter from the
water before it reaches the boiler, of a quiescent 55
settling pot for settling out solid matter precipi
tated in the boiler and carried in suspension by
the water back to the settling chamber, of a
clean-out for the bulk of the precipitated mat
ter, of an expansion or steam chamber for re
ceiving steam generated in the boiler, and of a
chamber for a regulating damper directing the
steam to a vapor supply pipe or to waste.
The upper end of the settling chamber, which
is here shown as of vertical cylindrical construc 65
tion, is closed by a cap 46 threaded to receive the
lower end of an outlet pipe 41 for humidifying
vapor-vapor to be used for humidifying-éand a
waste pipe 48 for vaporwhich is not to be used‘
for humidifying. A damper 49 is mounted in the 70
cap 46 by means of a pivot pin 58 and so ar
ranged that in one position it closes off the out
let pipe 41 and in the alternate position it closes
the waste pipe 48. A damper arm 58' on the
exposed end of the pivot pin 50 permits manipu 75
lation of the damper. If it is found that the
boiler is generating steam at a faster rate than
required for the desired humidity, the damper,
which is normally in a position to close off the
waste pipe 48, may be moved to permit the waste
of a certain portion of the steam generated. Or,
if the humidifying is to be. entirely eliminated
temporarily, the damper may be swung to close
o? the outlet pipe/41.
Steam which has been generated in the boiler
and which fills the steam discharge pipe 39 and
charge of water through the over?ow passage 35
in the ?oat chamber in the event the ?oat valve
should fail to close. In this installation the fur
nace wall-42‘ of Fig. 1 is preferably the single
thickness of the frame of .the feed door I56v as
shown best in Fig. 3, the boiler l5 being disposed
within the combustion chamber 51 of the fur
nace and near one lateral side thereof. The va
por outlet pipe 41 leading from the settling cham
ber I ‘I is extended horizontally inwardly at 58 10
through the crown of the air Jacket 59 of the
the settling compartment above the water level,
furnace, and preferably terminates centrally
serves to heat the walls thereof and impart that
heat to the quiescent water in the lower part of
15 the settling chamber. This serves to elevate
the temperature of the water as it is fed from
thereof whereby the vapor is equally distributed
the ?oat chamber to a point where a consider
able amount of the lime and other such matter
in the water is precipitated and, the water in the
settling chamber being quiet, settles in the bot
tom. There is, especially in the instance of the
application of my humidi?er to radiators as distingulshed from hot air furnaces, and as will
later be described, a certain amount of con
densed vapor which runs back through the out
let pipe 41 to the settling chamber where it adds
to the heat of the water therein. There is also a
certain amount of direct heat conductivity
through the metal of the pipes 38 and 39 also
serving to maintain a substantially elevated
temperature of the water in the settling chamber.
Because of the high temperature in the boiler
and the distilling effect of boiling off of water
there, a considerable amount of lime and other
matter brought in in solution in the water is
precipitated out of solution in the boiler, but
due to the turbulence of the boiling water the
precipitated matter for the most part stays in
suspension and dis‘ributes itself back through
the water inlet pipe 38 and into the settling
chamber. The diameter of the water inlet pipe
38 is preferably so large in proportion to the rate
of water feed that the speed of ?ow of the
water is less than the rate at which suspended
45 matter will dissipate itself through the pipe 38
back to the settling tank. Once in the quiet of
the settling tank, it will settle to the bottom.
In this way, as I have found from experience,
some 90% of the total volume of precipitated
50 matter will accumulate in the bottom of the set
tling tank. The settling tank has ample volume
below the pipe 38 and the passage 36 for the
accommoda‘ion of a few months’ accumulation
of precipitated matter. From time to time it
(21 O! may readily be removed by shutting off the wa
ter supply valve and removing the bottom closure
plate 5| of the settling tank by means of the
cap screws 52.
Because the water level maintained by the ?oat
CO valve is below the steam discharge pipe 39, there
is no water circulating circuit established tend
ing to create curren‘s which would interfere
with the quiescence of the water in the settling
In Fig. 3 I have shown the vapor generating
unit of my humidi?er installed in a conventional
type of hot air furnace 55. The supply water
for the ?oat chamber is preferably taken from
the household water supply line 53 by means of
a saddle valve 54 to which the water supply tube
I8 is connected. Thevsaddle valve is adjusted
to cut the water supply at- the prevailing water
‘pressure down to the maximum rate at which
the water is to be boiled off in the steam gen
This likewise limits an excessive dis
75 erator.
to the several hot air ducts 60, whence the un
divided air is led into the rooms through the 15
usual hot air regis‘ers.
Whether the furnace burn coal, gas or fuel
oil, or whether it be of the continuous or inter
mittent ?ring type, the water boiling heat, and
even the heat which will vaporize the water short
of boiling temperature, is in proportion to the
heat supplied to the heating system for main
taining the room temperature. As explained in
the introduction to this speci?cation, this causes
the delivery of water vapor by the humidi?er 25
substantially as and in the amounts required
to maintain the desired humidity in the rooms,
even though the outside temperature varies
greatly and even though the room temperature
is varied from time to time.
In the instance of a coal ?red furnace or boiler
where it is of advantage to have water vapor
supplied to the fuel for better combustion, the
vapor waste pipe 48 from the settling chamber
may be connected with an ash pit pipe 6| to de
liver waste vapors to the ash pit at such times
as the damper 49 may be adjusted partially or
wholly to open the waste pipe 48.
In Fig. 4 I have shown my humidity generator
applied to the instance of a hot water or steam 40
boiler 65 where, similarly, the boiler is mounted
in the combustion chamber by passing the pipes
41 and 48 through a single thickness of metal
in the frame of the feed door 61, if possible.
I have indicated in Fig. 4 radiators on the 45
?oor above which are served by the boiler. The
vapor outlet pipe 41 is connected with vapor tub
ing 10 which leads to condensate traps 'Il below
the ?oor and beneath each radiator. A short ‘
length of vertical pipe 12 leads from the trap ‘H 50
through the ?oor and communicates with the
drain pan 13, one of which is located beneath
each radiator 14 served by the humidi?er. Each
drain pan ‘I3 may comprise a lower upstanding
vertical side 15 and a bottom 16 sloping to the 55
communication of the vertical pipe 12.
Vapor generated in the boiler passes through
the upper part of the settling tank 46 through the
vapor outlet pipe 41, the vapor tubing 10, the trap
‘H, and the vertical pipe 12 and into the stream 60
of air rising upwardly from the bottom of the
radiator. Until the radiator has been sumciently
heated, there may be some condensation of the
vapor thus supplied, but this condensed vapor
gravitates to the bottom of the sections of the 65
radiator and drops into the drain pan ‘I3, whence
it is drained into the trap ‘H. The trapv ‘II is
su?iciently heated by the steam passing there
through to re-evaporate the condensate caught
in the trap.
Except for such steam as is condensed under
the circumstances mentioned-and all thus con
densed will drain- back into the drain pan-all of
the steam will be delivered to the air where it is
_ the warmest in the room and where, by virtue of 75
its being heated'b'yTthe radiator, the air will be
of su?lciently high temperature to absorb the
moisture and distributed throughout the room
without further condensation. There is gener
ally a certain amount of lag in time between the
generation of the steam in the ?ash boiler and
the heating of the radiators, especially in hot
water heating systems. That, however, is a rela
tively brief delay. In general, it will be ob
10 served, the delivery of moisture by my humidi
?er is at the time when the radiators are warm.
Also, the'rate at which moisture is supplied is
more or less in proportion to the temperature to
which the radiators are heated. Thus the mois
15 ture is supplied to the air passing over the radi
ator at the time of and in proportion to the ca
pacity of the air, due to the heating thereof by
the radiator, to receive and absorb and distribute
the moisture.
As compared with water evaporating pans
which are heated by the radiators themselves or
by the air passing therefrom, my humidity supply
by steam generation in the combustion cham
ber has the advantage of being more quickly sup
plied in response to intermittent ?ring periods
and, even more important, the moisture may be
supplied in greater volume and better automat
ically controlled quantitatively to supply the
requisite amount of moisture to maintain a con
30 stant percentage of humidity.
In Fig. 9 I have illustrated a modi?ed form of
communication between the vapor outlet pipe 41
and the drain pans 13, which is distinguished by
the inclusion of a separate condensate return
35 from the trap ‘H to the vapor, outlet pipe 41.
Each condensate return tube or pipe 11 leads
from the bottom of the associated trap ‘I l, where
by the returning condensate does not interfere
with the travel of the vapor. .
For certain types of installation, it may be
desirable to provide an adjustment as between
the fuel consumption and the steam generated
for humidifying the air. For serving the purpose
of this adjustment, I may provide a mounting for
the boiler whereby its position in the combustion
chamber may be changed to bring it closer to or
farther away from zones of greatest heat.
In Figs. 6 and 7 I have shown such an adjust
able mounting for the boiler. Here the spaced
50 parallel water inlet pipe 38 and steam discharge
a swinging of the boiler-settling chamber-?oat
chamber-unit, the water feed to the ?oat cham
ber is preferably through a ?exible hose l8’.
Similarly a ?exible section would be embodied in
the vapor outlet pipe 41.
While for most practical purposes an original
installation with proper balance between the
vapor generation and fuel combustion will main
tain a satisfactory degree of humidity in the
rooms, I contemplate that if desired for greater 10
accuracy or unusual circumstances, a hygrostatio
control may be provided for my humidi?er.
I have shown such a hygrostatic control in Fig.
8. A hygrostat 80 is mounted in the room space
to be heated and through a suitable electric cir 15
cuit controls a motor driven actuating device 8|
which, through a chain 82, lifts, or permits to
drop, the weighted extension arm 83 for the
damper arm 58'. Upon an increase of relative
humidity beyond a predetermined degree, the 20
hygrostat actuates to close or partially close the
vapor outlet pipe 41, while on a drop of rela
tive humidity below the predetremined degree,
the hygrostat acts to move the damper to open
the outlet pipe 41 and, if necessary, to close the 25
discharge to the waste pipe 48.
In Fig. 10 I have shown a modi?ed form of
steam trap ‘II’ which may be substituted for the
steam trap 'II. From the top of the trap ‘H’ the
pipe 12 leads through the ?ooring to the drain 30
pan 13. The vapor conduit 10 is led to the lower
end of the trap. An upstanding steam passage
85 is formed in the lower portion of the steam
trap and extends from the ?oor 88 thereof to an
intermediate height and is preferably cast in 35
tegral with the steam trap by suitable coring.
The lower end of the steam passage 85 is sub
stantially in line with and receives steam from the
conduit 10. An opening in the bottom wall 88 of
the main chamber of the trap communicates with 40
a horizontal passageway 81 formed below the
bottom wall 86. At the end of the passageway
81 adjacent the steam conduit 10 is a low up
standing wall 89. Adjacent the other end of the
passageway 81, the bottom wall is provided with 45
a depending lip 88' which extends below the up
per end of the wall 89. The passageway 81 thus
will form a water sealed trap by virtue of con
densate accumulated in the bottom of the
trap ll’.
Because the diameter, of the passage 85 is
somewhat less than the diameter of the steam
conduit 18, the pressure will be somewhat less in
the main chamber of the trap than in the small
space surrounding the upstanding wall 89 above 55
the steam conduit 18. The trap ‘ll will thus act
as an expansion chamber to reduce the pressure
pipe 39 pass through the feed door rather than
the frame for the feed door. They do not di
rectly engage holes in‘ the feed door, however,
but instead they pass through, and are slidably
55 journaled in, the respective bores of a Siamese
twin sleeve casting 18, which, in turn passes
through suitably spaced holes in the feed. door
and is secured to the feed door by the mounting
screw 19. This slidable mounting of the pipes 38
and 39 permits the boiler to be inserted to the
sure differential will permit condensate to ?ll up
central zone of the combustion chamber for
the lower portion of the trap ‘I i ' to a considerable
greater heating effect, or withdrawn toward the
height and maintain a large body of accumulated
marginal zone of the combustion chamber for a
lesser heating e?ect. By experiment the opti
65 mum position of the boiler for given circum
stances may be determined.
Such an installation as shown in Figs. 6 and 7
is recommended only where the furnace or boiler
burns gas or oil and where the feed door need be
70 opened but infrequently. When it is necessary
to open the feed door, the parallel pipes 38 and
39 can be withdrawn outwardly until the boiler
comes against the inside of the feed door, so that
when the feed door is swung open the boiler will
78 clear the frame of the door. Since this involves
of the steam passing out through the outlet pipe
12 to the exterior of the radiator. Also this pres‘
condensate so that it will not run down the steam
conduit 18 while steam is being generated. At
‘the close of the ?re period the collapse of pres
sure within the trap l1’ and the consequent
equalization of pressures therein will permit the
accumulated condensate to flow through the pas
sage 81 and over the wall 89 and down the steam
conduit 18 back to the settling chamber at a time
when it will not interfere with the up-travel of
the steam.
While I have shown and described these speci?c
embodiments of my invention, I contemplate that
many changes may be made therein without de
2, 138,599
parting from the scope or spirit of my invention.
I claim:
1. A humidiiying apparatus for supplying wa
ter vapor to the space heated by a heating plant,
comprising a boiler, means for supporting the
boiler within, and subject to the heat of, the
combustion chamber of the heating plant, a set
tling chamber without the combustion chamber,
a water feed conduit from the settling chamber
10 to the boiler, a steam feed conduit from the boiler
to the settling chamber, means for supplying
water to the settling chamber to maintain a wa
ter level therein above the water feed conduit
and below the steam feed conduit, a vapor dis
charge conduit from the settling chamber above
the water level for delivering vapor to the-air
heated by the plant, a waste vapor passage also
communicating with the settling chamber above
the water level, and a damper mounted in the
settling chamber to swing between two positions,
one position shutting off the vapor discharge -
conduit and the other position shutting off the
waste vapor passage.
2. In a humidifying apparatus, in combination
a ?re door, a ?tting mounted thereon having a
pair of bores open to both sides of the door, a
boiler on the inside of the door, a precipitation 10
chamber on the outer side of the door, and pipes
passing through said bores connecting said boiler
and chamberand slidable therein, whereby the
boiler may be moved outwardly into a position to
enable the door to be opened.
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