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Патент USA US2107077

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Feb. 1, 1938.
2,107,077
P. G. MAGNER
ÈSYCHROMETER -
Filed Jan. 18, 1935
gnam/MO@
.Philip GMagner
Patented Feb. 1, 1938
2,107,077
UNITED STATES PATENT OFFICE.
2,107,077
PSYCHROMETER
Philip G. Magner, Wabash, Ind., assignor to
Minneapolis-Honeywell Regulator Company,
Minneapolis, Minn., a corporation of Delaware
Application January 18, 1935, Serial No. 2,366
7 Claims.
This invention relates to psychrometers and a
sock and wick construction therefor.
Conventional psychrometers as known today,
having a wick secured to the lower end of the
5 sock, do not correctly indicate the humidity, es
pecially when the relative humidity is low. The
vreasons for the inaccurate indications of these
psychrometers are that the temperature of the
water supplied to the wick, and consequently the
this_may be accomplished by the provision of a
partition.
,
~
'
Other objects and advantages will become ap
parent to those. skilled in the art by reference
to the accompanying specification, claims, and 5
drawing, in which:
A
Fig. 1 is a vertical sectional view through the
psychrometer of this invention;
'
Fig.'2 is a perspective view of the integral or
10 temperature of thewater lsupplied to the sock,
unitary sock and wick device forming a part of v10 '
may be diiîerent from the true wet bulb tempera
ture whereby the wet bulb indications may be in
accurate upwardly or downwardly, depending
on whether the water temperature is higher or
15 lower than the true wet bulb temperature; that
the wick may not supply suñ‘lcient water to the
this invention;I and
sock to be evaporated thereon; and that there
may not be a suflicient amount of-flow of air past
the sock to cause suflicient evaporation.
20
It is an object of this invention, therefore, to
provide a psychrometer that eleminates'the above
causes for faulty indications.
>
Figs. 3 and 4 are perspective views of the uni
tary sock and wick device applied to the ther
Amometer of the psychrometer of this invention.
’I'he psychrometer comprises a housing I0 the 15
bottom portion of which is hollowed out as at Il
to receive a bottom'plate I2. The bottom plate
I2 is appropriately secured to the housing III in
a fluid tight manner, the housing I0 and the
bottom plate I2 forming a reservoir for a water 20
supply for the psychrometer. Water is supplied
to the reservoir through a ñller opening I3 in -
y
Inasmuch as it would be impractical to main
tain the temperature of the supply of 'water the
25 `same as the true wet bulb temperature, it is an
object of thisfinvention to provide means where
by the temperature of the water supplied to the
sock is maintained at, or extremely near the true
` wet bulb temperature regardless of the tempera
the housing I0. The ñller opening I3 is normally
closed- by means of a removable filler cap I4.4
Suitably secured to the housing I0 and above the 25
>level of the water supply in the reservoir is a
transverse plate I5 having an opening therein
near the center ~thereof in which is soldered a
tube
I6.
V
'
The upper portion of the housing I0 is provided 30
- 30 ture of the water supply.
More speciñcally, it is an object of this inven
tion to provide means ~for passing the air or gas,
with an opening I1 in which is placed a cover»
member I 8. The cover member I8 isjprovided
the relative humidity of which is to be measured,
with a vertically extending tubular portion> I9
and an elbow portion 20 forming gas or air inlets
and outlets, respectively, for the housing or cas- 35'
over the wick supplying water to the sock where
35 by the water in the wick as it isdelivered to the
sock is at or extremely near to the wet bulb
temperature.
f
In order to secure adequate wetting of the sock>
at all times it is an object of this invention to
40 provide a novel sockv and wiclrconstruction.
More specifically, an object of this invention
is to'provide aunitary or integral sock and wick
device wherein there will be a free flow of water
from the wick portion to the sock portion vof the
45 sock and wick device.
Further, in order to provide an adequate ilow
of air past the sock- and wick, it is an object of -
this invention to providea novel air ilow con
trolling means whereby the air, the humidity of
50 which is to be measured, is'conñne'd to pass over
-the sock and wick.
-
‘
Still further, in order to prevent undue evap
oration of the water supply for the wick, it is an
object of this invention to prevent contact of the
'55 circulated air or gas with the water supply, and
ing I0. A wet bulb thermometer 23 and a dry
bulb thermometer 24 are secured and’clamped
in a clamp member 2| by means of a wing nut
22 cooperating with a screw. The thermometers
23 and 24 are inserted in the inlet tubular por-V 40
tion I3 and are held in place by means of the
clamp 2_I being inserted in slots 25 in the' tubu-`lar portion I9. From this it is seen that the
thermometers 23 and 24 are maintained direct
ly in the path of the gas or air the relative 45
humidity of which is to be measured.
-
Secured to the wet bulb thermometer 23 are
a'sock 26 and a- wick 21. AThe wick 2_1 .extends
downwardly from the upper portion of the sock
.26 through the tube IG into _the water supply 50
at the bottom of the casing o_r housing I0.
,
Referring now to Figs. 2, 3, and 4, the manner
ïof constructing the unitary sock and wick device
o_f this invention is‘_clear1y illustrated. lAn elon
gated piece of tubular sock material such as rayon 55 -
2
2, 107,077
tubing is used. Near one end of the tubular sock
material an incision 30 is made, as shown in Fig.
2. 'I'he wet bulb thermometer 23 is inserted~
through this incision 30 into the sock material,
as shown in Figs. 3 and 4, and the portion of the
sock material surrounding the thermometer v23
forms a sock. The remaining and larger portion
of the tubular sock material extends downwardly
into the water supply to form a wick portion 21
for supplying water to the sock portion 26. The
bottom of the sock portion remote from the inci
sion 30 is preferably closed by means of a string or
like means 29. The sock and wick >are secured to
the wet bulb thermometer 23 by means of a string
to substantially wet bulb temperature regardless
of the temperature vof thewater supply; wherein
the passage of the gas or air past the sock and
wick is confined to increase the evaporating ac
tion on the sock and wick; wherein undue evap
oration of the water supply is eliminated; and
wherein free and easy travel of the water from
the Wick to the sock is accomplished by means of
my novel unitary sock and wick device.
While one embodiment of this invention has
been shown and described, it is obvious that many ’
modifications may be apparent to one skilled in
the art, and consequently this invention is to be
limited only by the scope of the .appended claims.
I claim as my invention:
or like means 28.
`
1. In a device of the class described, a casing
described manner an improved operation is ob~ ' adapted to contain a water supply therein at a
tained in that the sock portion 26 is _integral with lower portion thereof, a gas inlet and a gas outlet
the wick portion 21 whereby a free flow-of water in saidcasing, means for passing a.v gas the relative
from the wick portion 21 to the sock portion 26 is humidity of which is to be measured. through said 20'
provided, there being no joints to obstruct the inlet, downwardly through said casing, and said
flow of water. Further, by securing the sock and outlet, a'thermometer extending in said inlet in _
wick construction to the wet bulb thermometer 23 the path of ilow of the gas. and a sockand wick
in the manner shown in Figs. 3 and 4 by placing secured to said thermometer, said wick extending
25 the string or like means 28 around both the sock ~ substantially vertically from the upper end of said
By constructing the' wick and sock in the above
portion 26 and the wick portion 21, strangulation -sock and downwardly into said water supply
oi' the flow of water from the sock portion 26 to
the wick portion 21 is prevented» since water may '
flow from the sock portion to the wick portion be
30 low the string 28.
-.
Referring now to Fig. l, it is seen that the wick
portion 21 extends downwardly from the upper
whereby the gas passes over said sock and said
wick to bring the water supplied to said sock by
said wick to substantially wet bulb temperature.
2. In a device of the class described, a casing 30
adapted to contain a water supply therein in a
lower portion thereof, a gas inlet and a gas outlet
end of the sock portion 26. By reason of this, -the ~ in said casing, means for passing a gas, the rela- .
tive humidity oi.' which is to be measured, through
measured, is passed over both the sock portion ’ said inlet, downwardly through said casing, and
26 and the wick portion 21.J If the water supply said outlet, a thermometer extending in said inlet
air or gas, the relativehumidity of which is'to be
35
is warmer than the true wet bulb temperature,
in the path'of ilow of the gas, a sock and wick
this warmer water, as it travels up the wick por
secured to said thermometer, said wick extending
substantially vertically from the upper end of said
sock and downwardly into said water supply 40
whereby the gas Apasses over said sock and said
wick to bring the water supplied to said sock by
said wick to :substantially wet bulb temperature,
and a partition in said casing above said wat r
supply having an opening therein through whic V4.5
said wick extends whereby contact of the circu
tion 21 by capillary action, is cooled by evapora
40 tion caused by the air or gas passing~ over the
wick portion 21. This evaporation of water in the
wick portion 21 causes cooling of the water therein
to, or nearly to, the true wet bulb temperature so
that water at the correct temperature is supplied
to the sock portion 26 by the wick portion 21 re
gardless of the temperature of the water supply.
This construction in effect.' causes a precooling of
the water used for wetting the sock portion 26,
whereby accurate indications of humidity may be
obtained.>
y
lated gas with the water supply is prevented.
3. In combination, a sock and wick construc
tion comprising an elongated piece of tubular sock
material having an incision therein, a thermom- 1
'
Air or gas is drawn in through the inlet tube I9
of the casing I0 and out through the outlet elbow
' 20 by means of a fan 3| which is operated by a
eter extending through said incision into said sock
material, the portion of said sockvma'teriál sur
rounding said thermometer forming a sock and
conventional motor 32. The motor 32 is mounted the remainder of sock material forming a wick,
55 on a base 33 which is made integral with the cas
ing or housing i6 by means of a web 3l. Also in
tegral with the housingv l0 is a gas or air funnel
35 which confines the flow of air about the fan 3|
the wick portion of said sock material being -55
doubled back on the sock Iportion thereof, vand
means for securing the sock portion to said ther
mometer and for securing said wick portion in
l said doubled back relation to said sock portion.
-to increase the eiiiciency of operation thereof.
4. In combination, a sockl and wick construc
.'By reason ~of the transverse plate I6 and the
tubular portion I6, the circulating air or gas in ' tion comprising an elongated piece of tubular sock
the housing Ill is maintained out of contact with material having an incision therein, a thermom
the water supply in the reservoir at the bottom of eter extending through said incision into said sock
the housing Ill whereby undue evaporation of the material, _the portion of said’ sock material sur
rounding .said thermometer forming a sock and
65 water supply by the circulating gas orl air is pre
the ren'iainder of said sock material forming a
By reason of the tubular portion Is of the cover- wick, the wick portion of said sock material being ‘
member I8 the air or gas, the humidity of which doubled back on the sock portion thereof and
is to be measured, is conñned for passage overv secured thereto, means _for closing the open end
the sock portion 26 and the wick portion 21 which of said sock portion, and means for securing the 70
sock portion to said thermometer.
vincreases the evaporating action~ in the sock por
tion 26 to give more accurate wet bulb indications. ~ 5. In a device of the class described, a casing
60
vented.
,
'
'
From the above it is seen that I have invented a
adapted to contain a water supply therein in a
psychrometer of novel construction wherein the lower portion thereof, a gas inlet and a gas outlet
75 water supplied to the sock by the wick is brought ' for said casing in an upper portion thereof, means 75
9,101,017
.tri
for passing a gas, the relative humidity of which sock and wick device, said wick portion of said',i
is to be measured, through said inlet, said casing. device extending fromthe upper end ofsaid sock
and said outlet, a thermometer extending in said v portion of said device downwardly into sai'd water'.v „
_ inlet in the'path of flow of the gas and at an
supply whereby the gas passes over said sock and y,
angle to the horizontal, a unitary sock and wick
device secured to said thermometer by extending
wick portions to bring the water supplied to said@ 5`
sock portion by said wick portion to substantially
said thermometer through an incision in said uni- '
wet bulb temperature, and a partition in said ca's- _
tary sock and wick device, said wick portion of
said device extending from the upper end of said
_sock portion of said device ldownwardly into said
water’supply whereby the gas passes over said
ing above. said water supply having an opening
-therein through which said wick portioxf extends a;
whereby evaporation of ‘said water supply by the l0
circulated gas is substantially prevented.
sock and wick portions to bring the water sup
7. In a device of the class described,a passage
plied'to said sock portion by1 said wick portion-` for the iìowV of a gas, the relativehumldity of
to substantially wet bulb temperature.
which is to .be measured, a thermometer in said i.
6. In a device of the class described, a casing
adapted to contain a water supply therein- in a
lower portion thereof, a gas inlet and a gas outlet
for said casing in an upper portion thereof, means
for passing a gas, the relative humidity of which
passage, a-sock and wick secured to said ther- 15
mometer, and a supply of water foi' said wick
spaced from said sock, said wick- extending from
the end of said sock farthest from said water into
said water over a path through said gas passage,
is to be measured, through said inlet, said casing,
and said outlet, a thermometer extending in said
inlet in the path of ñow of the gas and at an angle
the closest point of the path to the inlet o_f the 20
~thermometer through an incision in said unitary
PHILIP Aci. MAQNER. .Í 25
passage being the end oi the sock to which ~the
wick is attached, whereby the gas passes over ñrst
to the-horizontal, a unitary sock and wick device ` the sock and the wick and then the wick alone.
secured to said thermometer by extending said
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