US2110164A - Air conditioning - Google Patents

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US2110164A
US2110164A US486122A US48612230A US2110164A US 2110164 A US2110164 A US 2110164A US 486122 A US486122 A US 486122A US 48612230 A US48612230 A US 48612230A US 2110164 A US2110164 A US 2110164A
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air
enclosure
temperature
dehumidifier
humidity
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US486122A
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Lawrence D Mcdonald
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/12—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air
    • F24F6/14—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air using nozzles
    • F24F2006/146—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air using nozzles using pressurised water for spraying

Definitions

  • PatentedlMar. 1938 UNnr-:D STATES- PATENT oFFlcE y LawrenceD. McDonald, Kansas City, Mo. Application ctober 3, 1930, Serial No. 486,122
  • This invention relates to apparatus for controlling temperature andy humidity within an enclosure and is especially adapted for use in connection with theatres or similar places where 5' the audience is to be housed within a room main- .tained at a temperature substantially lower than the outside temperature during the summer time and at a predetermined desired temperature during the colder months.
  • the primary object of the invention is the provision of apparatus especially adapted for controlling the temperature and humidity within an enclosure by controlling the total volume of air introduced into said enclosure.
  • y y l5 A vyetfurther object ofthe invention is the provision 'of combined temperature and humidity regulating apparatus, the volume of air passing therethrough to the enclosure being treated, and regulated by the relative humidity of the air pass- ;0 ing from said enclosure.
  • One of the further objects of. the invention is the provision oi' temperature regulated means within a dehumidifier which is actuated by the change in temperature in a manner to alter the amount of spray water used within the dehumidifier.
  • the invention further contemplates the combination with a dehumidanderr of ordinary structure of a pair of thermometers which are interlo connected and positioned adjacent the air inlet and air outlet in a manner which allows setting the same to maintain a temperature dlierential at the air inlet to the humldier and at the point of 'entrance of the treated air into the enclosure.
  • Figure 1 is a vertical fragmentary sectional view through a dehumidifier showing the ar ⁇ rangement of parts as contemplated by this invention.
  • Fig.v 2 is an enlarged vertical central section through a humidostat embodying the ,features of the present invention.
  • Fig. 3 is a diagrammatical lay-out of the interconnected thermostats showing their relation to the means for supplying the water to the cooling coilsl of the dehumidifier, and,
  • Fig. 4 is an enlarged fragmentary vertical section through the valve associated with the thermostat adjacent the air outlet.
  • a well known dehumidier A may be usedto act upon vair ⁇ passing to the enclosure B, wherein the temperature and humidity is likely to be constantly and suddenly altered by the entrance and exit of a large number of people.
  • 'I'he dehumidifier with which rthe parts made in accordance with this invention are combined with eiect comprises a housing 6, having an air inlet opening 8 and an air outlet I0, between which is located a series of cooling coils I2, within which is provided a.v refrigerant of some ysort sufficient to cool the incoming air as it passes thereover.
  • Coils I2 should have water sprayed thereover and in the instance shown thereis provided a plurality 'of spray heads I4 which spray water downwardly over coils I2 and which will supply it with water through the intermediacy of a' pumpv I6 driven by motor or analogous means I8.
  • a plurality of spray heads 20 is provided which force a substantially horlzontal spray against coils I2.
  • the air dehumidifier or conditioning apparatus should include, besides the cooling coils, the pumps, the interconnected temperature regulated means, means to control ,the supply of water to said coils, and a plurality of elim-A inators to form serpentine paths lwherein moisture is lost from the air as it travels.
  • a heating coil 26 should be provided to receive steam for the purpose of treating the air ⁇ passing into enclosure B to the desired temperature.
  • An air shaft 36 connects with a fan 62 which is interposed between enclosure B and dehumidifier A.
  • This fan is driven by a motor 34 through the use of a belt or similar structure 36 and draws air through the air outlet I and forces it to the enclosure B through 'air shaft 36 as shown in jFig. 1.
  • ⁇ Air leaving enclosure B passes through conduit 38 which is in communication with, the
  • dehumidifier A A certain amount of outside or atmospheric air should be taken into the apparatus through outside air inlet 40, but a series of 'dempers 42 may be 4provided to regulate the amount if necessary. Dampers 42 should never be entirely closed to preclude circulation but It is desirable in practicing this invention to combine with the apparatus a thermostat 44 which is positioned i'n the path, and is acted upon by, the incoming outside atmospheric air.
  • a second thermostat 46 is positioned' in the path of travel of air leaving the dehumidifier A and is preferably located where the temperature of the air striking the samewill vnot be different from the temperature of the air entering enclosure B.
  • Thermostat 46 when actuated by the change in temperature, moves a plunger 46 to open and close a valve 56 interposed in an air line 52.
  • ⁇ sutiable motor driven air pump 54 supplies air under pressure to air-line 52 and when valve 50 is opened, air will pass through line 52 and close switch 56 which controls the current to motor 24. Obviously, the opening and closing of valve 50 starts and stops respectively, motor 24.
  • bleeder valve should be interposed in line 52 betweenv valve .56 and switch 56 to insure against trapping oi' air and to positively release airpressure which is great enough to hold switch 56 closed. This valve is so small that it does not affect air pressure from pump 54. 'Ihus will spray through heads 2l) be cut olf or allowed to flow as thermostat 46 is moved, by the change in temperature lat the air outlet I6.
  • the humidostat 64 includes a wet bulb thermostat 68 and a thermostat 16 which are connected together by a bar or similar device 12 having an adjustable fulcrum arm 14 which may be moved along a bearing platform 16 carried by links 18 so as. to maintain the platform. 16 in operative position upon lever 66 which is pivotally supported as at 82.
  • Compression spring 64 nialintains the point of lever 86 against the platform 1.6 and as the same is moved up or down, lever ⁇ 66 pivots about the pivotal point 62 to 'throw in or out, as the case may be, the series of coils forming a part of controller 66.
  • the speed of motor 34 is altered in accordance with the relative movement betweenwet bulb thermostat 66 and Athermostat ;10, which is expressedin terms of the movement of fulcrum arm 14.
  • the humidostat may be set for any desired humidity and any increase above that predetermined humidity will cause the fan -32 to reduce its speed'until the air introduced into enclosure B is reduced and the humidity is decreased to the desired point. Since the temperature of the air is also controlled before it enters enclosure B, it is possible to maintain a desired temperature or humidity within the enclosure without the use of 'further devices.
  • an air dehumidier having an air inlet, an air outlet, a fan for drawing air into the dehumidifierand forcing it into saidenclosure, said dehumidifier comprising cooling coils within the dehumidier, a pump for spraying water over the v cooling coils and interconnected temperature regulated means adjacent said air inlet and air outletv having means for controlling the supply of spray water passing over said cooling coils.
  • an air dehumidier having an air inlet, an vair outlet, a fan for drawing air into the dehumidifier and forcing it into said enclosure, said dehumidier comprising cooling coils within.
  • the dehumidier pumps for spraysaid rst mentioned acts upon the second mentioned to vary the action thereof and a switch for starting and stopping one of said pumps, said switch being controlled by action of said outlet thermostat whereby to control the supply of spray water passing over -said cooling coils.
  • said dehumidifier comprising cooling coils withinI the dehumidiiier, a pump for spraying water over the cooling coils and interconnected temy perature regulated means adjacent said air inlet and air outlet having means for controlling the supply of spray water passing overl said cooling coils, said temperature regulated means being constructed to act Auponl the ,dehumidiner to .-maintain a predetermined difference in temperature between the air intake and air outlet.
  • Asaid dehumidiier comprising cooling coils within the dehumidier, pumps for spraying water over the cooling coils, an air conduit connecting the enclosure and said dehumidier, a humidostat within saidconduit to be acted upon by air pass- 1 ying therethrough from the enclosure and a controller for.altering the speed of the fan operable by said humidostat whereby a greater or lesser.
  • the combination of 'an air dehumidifier having an outside air inlet, an air outlet, affan for drawing air into the dehumidifier and forcing it into said enclovsure, said dehumidifier comprising cooling coils within the dehumidifier, puinps for spraying water over the cooling coils, an air conduit connecting the enclosure and said. dehumidifier, a
  • said air being drawn through the dehumidifier over said cooling coils and means to adjust the amount of spray .water to the coils including a thermostat at the outside air inlet, a thermostat at the air outlet from the dehumidifier, said last mentioned thermostat having means associated therewith and operable by the ilrst mentioned thermostat for altering the eective action thereof whereby the temperature of the volume of air entering the enclosure under the control of said humidostat is controlled by said two thermostats.
  • means for controlling the volume of air forced into the enclosure including a humidostat positioned to 'be acted upon by air passing from the enclosure, a controller associated with said humidostat and a motor-driven fan operatively connected to said controller, said humidostat having a' wet bulb thermostat, a thermostat and connection between the same, said connection being operathermostat is varied by air leaving theenclosure.
  • means for controlling .the volume of air forced intol the enclosure including a humidostat positioned to be acted upon by air passing from the enclosure, a controller associated with said humidostat and a motor-driven fan operatively connected to said controller,v said humidostat having a wet bulb thermostat, a thermostat and a connection between the same, means to operate the controller and means to vary the relation between the connection and controller' actuating means.
  • a method of conditioning air consisting of passing all of the air to be conditioned through a chamber in which a cooling medium is located and controlling the temperature and/or relative humidity-of the air by varying the area of said cooling medium exposed to contact with the air through the medium of interacting devices responsive to the temperature conditions before and after the air has passed through the chamber.
  • a method for conditioning air in a ventilating system consisting of conducting the air.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Central Air Conditioning (AREA)
  • Air Conditioning Control Device (AREA)

Description

Mrch 8, 1938. l.. D. MDoNALD,
AIR CONDITIONING Filed OOb. 3, 1930 2 ShOOtSr-Sheet 2 v INVENTOR, ka/aww /f @Wa/.
BY v
A TTORNEYS.
PatentedlMar. 1938 UNnr-:D STATES- PATENT oFFlcE y LawrenceD. McDonald, Kansas City, Mo. Application ctober 3, 1930, Serial No. 486,122
10 Claims.
This invention relates to apparatus for controlling temperature andy humidity within an enclosure and is especially adapted for use in connection with theatres or similar places where 5' the audience is to be housed within a room main- .tained at a temperature substantially lower than the outside temperature during the summer time and at a predetermined desired temperature during the colder months.
l0 .The primary object of the invention is the provision of apparatus especially adapted for controlling the temperature and humidity within an enclosure by controlling the total volume of air introduced into said enclosure. y y l5 A vyetfurther object ofthe invention is the provision 'of combined temperature and humidity regulating apparatus, the volume of air passing therethrough to the enclosure being treated, and regulated by the relative humidity of the air pass- ;0 ing from said enclosure.
One of the further objects of. the invention is the provision oi' temperature regulated means within a dehumidifier which is actuated by the change in temperature in a manner to alter the amount of spray water used within the dehumidifier.
The invention further contemplates the combination with a dehumidiiler of ordinary structure of a pair of thermometers which are interlo connected and positioned adjacent the air inlet and air outlet in a manner which allows setting the same to maintain a temperature dlierential at the air inlet to the humldier and at the point of 'entrance of the treated air into the enclosure.
35 It is well known in this art that where an enclosure is to be maintained at a predetermined temperature and humidity that some regulation must be provided as the number of things within the enclosure is varied.
. to alter the total airvolume passed through the enclosure in order .that` the air temperature and humidity might be controlled and it is also a point of the invention to control the temperature of the` air .prior to itsflieing introduced into said In'the warmer months it is desirable to maintain an enclosure of the character above set perature. made in accordance with this invention to maintain the air being introduced, into the enclosure In the present invention itis contemplated forth at a temperature no t in excess of ten degrees lower than the atmospheric or outside air tem- Means is provided in the structure The present invention further contemplates novel structures and combinations of parts whereby to carry out the objects of the invention as hereinabove set down. Such structural details and further minor objects of the invention will appear'during the course of the detailed specification referring to the accompanying drawings wherein is shown in diagrammatical form an apparatus for controlling temperature and humidity within an enclosure. In the drawings:
Figure 1 is a vertical fragmentary sectional view through a dehumidifier showing the ar` rangement of parts as contemplated by this invention. V
Fig.v 2 is an enlarged vertical central section through a humidostat embodying the ,features of the present invention.
Fig. 3 is a diagrammatical lay-out of the interconnected thermostats showing their relation to the means for supplying the water to the cooling coilsl of the dehumidifier, and,
Fig. 4 is an enlarged fragmentary vertical section through the valve associated with the thermostat adjacent the air outlet.
'I'he invention may be embodied in structures ofvarious forms and characters and only the preferred form of the same is diagrammatically illustrated in the accompanying drawings, wherein like reference numeralsare used to designate similar parts throughout the several views.
In carrying out the invention a well known dehumidier A may be usedto act upon vair `passing to the enclosure B, wherein the temperature and humidity is likely to be constantly and suddenly altered by the entrance and exit of a large number of people. 'I'he dehumidifier with which rthe parts made in accordance with this invention are combined with eiect comprises a housing 6, having an air inlet opening 8 and an air outlet I0, between which is located a series of cooling coils I2, within which is provided a.v refrigerant of some ysort sufficient to cool the incoming air as it passes thereover. Coils I2 should have water sprayed thereover and in the instance shown thereis provided a plurality 'of spray heads I4 which spray water downwardly over coils I2 and which will supply it with water through the intermediacy of a' pumpv I6 driven by motor or analogous means I8. In addition to the spray heads I4, 'a plurality of spray heads 20 is provided which force a substantially horlzontal spray against coils I2. Likewise, a pump 22, driven by motor 24, supplies water to spray heads 20. Air passing into the dehumidifier through intake 8 leaves the coils I2 bythe way must'be open to some degree at all times.
of a plurality of serpentine-paths formed between eliminators 26 where a vast majority of v the water carried by the air is lost along saidl paths. From the description set down next above,l
it is obvious the air dehumidifier or conditioning apparatus should include, besides the cooling coils, the pumps, the interconnected temperature regulated means, means to control ,the supply of water to said coils, and a plurality of elim-A inators to form serpentine paths lwherein moisture is lost from the air as it travels. In case the apparatusis to be used in winter or during the colder months, a heating coil 26 should be provided to receive steam for the purpose of treating the air` passing into enclosure B to the desired temperature.
An air shaft 36 connects with a fan 62 which is interposed between enclosure B and dehumidifier A. This fan is driven by a motor 34 through the use of a belt or similar structure 36 and draws air through the air outlet I and forces it to the enclosure B through 'air shaft 36 as shown in jFig. 1. `Air leaving enclosure B passes through conduit 38 which is in communication with, the
dehumidifier A. -A certain amount of outside or atmospheric air should be taken into the apparatus through outside air inlet 40, but a series of 'dempers 42 may be 4provided to regulate the amount if necessary. Dampers 42 should never be entirely closed to preclude circulation but It is desirable in practicing this invention to combine with the apparatus a thermostat 44 which is positioned i'n the path, and is acted upon by, the incoming outside atmospheric air. A second thermostat 46 is positioned' in the path of travel of air leaving the dehumidifier A and is preferably located where the temperature of the air striking the samewill vnot be different from the temperature of the air entering enclosure B.
Thermostat 46, when actuated by the change in temperature, moves a plunger 46 to open and close a valve 56 interposed in an air line 52. A
`sutiable motor driven air pump 54 supplies air under pressure to air-line 52 and when valve 50 is opened, air will pass through line 52 and close switch 56 which controls the current to motor 24. Obviously, the opening and closing of valve 50 starts and stops respectively, motor 24. Av
small bleeder valve should be interposed in line 52 betweenv valve .56 and switch 56 to insure against trapping oi' air and to positively release airpressure which is great enough to hold switch 56 closed. This valve is so small that it does not affect air pressure from pump 54. 'Ihus will spray through heads 2l) be cut olf or allowed to flow as thermostat 46 is moved, by the change in temperature lat the air outlet I6.
When the ,temperature is too high,` valve 56 should be opened so that switch 56 may be closed, causing pump v24 to send an additional spray through the incoming air to cool or lower the temperature of the same. y
It is desirable to maintain a predetermined wardly, F18. 4, it will take a greater stroke on the part of plunger 46 to entirely close valve 50. As the outside temperature varies so does the position of plunger 62 and, accordingly, the proper differential between the outside temperature and the temperature of the air entering enclosure B will be maintained.
In combination with the temperature Acontrol as just above set forth, it is a feature of Athis invention to provide means to control the .volume of 'airto enclosure B which is actuated by the condition of air passing from the enclosure. Within air conduit 36 is positioned a humidostat 64 which is associated with a controller 66, which in turn alters the speed of motor 34 as the various resistance coils of controller 66 are thrown into and out of the circuit. Broadly speaking, and since the humidostat 64 alters the speed oi motor 34 in accordance with the humidity of the air passing from enclosure B,- this structure may be said to constitute one of the most important features of the present invention. Specifically, the humidostat 64 includes a wet bulb thermostat 68 and a thermostat 16 which are connected together by a bar or similar device 12 having an adjustable fulcrum arm 14 which may be moved along a bearing platform 16 carried by links 18 so as. to maintain the platform. 16 in operative position upon lever 66 which is pivotally supported as at 82.
Compression spring 64 nialintains the point of lever 86 against the platform 1.6 and as the same is moved up or down, lever` 66 pivots about the pivotal point 62 to 'throw in or out, as the case may be, the series of coils forming a part of controller 66. Thus the speed of motor 34 is altered in accordance with the relative movement betweenwet bulb thermostat 66 and Athermostat ;10, which is expressedin terms of the movement of fulcrum arm 14.
Manifestly, the humidostat may be set for any desired humidity and any increase above that predetermined humidity will cause the fan -32 to reduce its speed'until the air introduced into enclosure B is reduced and the humidity is decreased to the desired point. Since the temperature of the air is also controlled before it enters enclosure B, it is possible to maintain a desired temperature or humidity within the enclosure without the use of 'further devices.
It is understood that substitutions for the instruments herein described might be made so long as the performances of the same are substantially identical to those described and are capable of performinga like function. Having thus described the invention, what is claimed as newv i and desired to be secured by Letters Patent is:
l. In an apparatus for controlling temperature and humidity within an enclosure, the combination of an air dehumidier having an air inlet, an air outlet, a fan for drawing air into the dehumidifierand forcing it into saidenclosure, said dehumidifier comprising cooling coils within the dehumidier, a pump for spraying water over the v cooling coils and interconnected temperature regulated means adjacent said air inlet and air outletv having means for controlling the supply of spray water passing over said cooling coils.
2. In an apparatus for controlling temperature and humidity within an enclosure, the combination of an air dehumidier having an air inlet, an vair outlet, a fan for drawing air into the dehumidifier and forcing it into said enclosure, said dehumidier comprising cooling coils within. the dehumidier, pumps for spraysaid rst mentioned acts upon the second mentioned to vary the action thereof and a switch for starting and stopping one of said pumps, said switch being controlled by action of said outlet thermostat whereby to control the supply of spray water passing over -said cooling coils.
3. In an apparatus for controlling temperature and humidity within an enclosure, the combination of an air dehumidiiier having an air inlet, an air outlet, a fan for drawing air into the dehu'midler and forcing it into said enclosure,
said dehumidifier comprising cooling coils withinI the dehumidiiier, a pump for spraying water over the cooling coils and interconnected temy perature regulated means adjacent said air inlet and air outlet having means for controlling the supply of spray water passing overl said cooling coils, said temperature regulated means being constructed to act Auponl the ,dehumidiner to .-maintain a predetermined difference in temperature between the air intake and air outlet.
4. In an apparatus for controlling` temperature and humidity within an enclosure, the combina- 'tion of an air dehumidifier having an air inlet,
- an air outlet, a fan for drawing air into the dehumidifier and forcing it into said enclosure, said dehumidier'comprising cooling coils within the dehumidier, pumps for spraying water over the cooling coils, a thermostat at the air inlet. a thermostat at the air outlet, a connection between said two thermostats whereby the enective` action of the latter' is alteredby the former and means controlled by the combined action of the inlet thermostat and said outlet thermostat to control the action of said spray pumps.
.5; In an Aapparatus for controlling temperature and humidity within an enclosure, the combination of an air dehumidifier having an air inlet,
an air outlet, a fan for drawing air into the dehumidifier and forcing it into said enclosure,
Asaid dehumidiier comprising cooling coils within the dehumidier, pumps for spraying water over the cooling coils, an air conduit connecting the enclosure and said dehumidier, a humidostat within saidconduit to be acted upon by air pass- 1 ying therethrough from the enclosure and a controller for.altering the speed of the fan operable by said humidostat whereby a greater or lesser.
volume of air is forced into the enclosure. y
6. In an apparatus for controlling temperature and. humidity within an enclosure, the combination of 'an air dehumidifier having an outside air inlet, an air outlet, affan for drawing air into the dehumidifier and forcing it into said enclovsure, said dehumidifier comprising cooling coils within the dehumidifier, puinps for spraying water over the cooling coils, an air conduit connecting the enclosure and said. dehumidifier, a
humidostat within said conduit to be acted upon 1. by4 air passing therethrough from the enclosure, l
sure, said air being drawn through the dehumidifier over said cooling coils and means to adjust the amount of spray .water to the coils including a thermostat at the outside air inlet, a thermostat at the air outlet from the dehumidifier, said last mentioned thermostat having means associated therewith and operable by the ilrst mentioned thermostat for altering the eective action thereof whereby the temperature of the volume of air entering the enclosure under the control of said humidostat is controlled by said two thermostats.
7. In an apparatus for controlling temperature and humidity within an enclosure, means for controlling the volume of air forced into the enclosure including a humidostat positioned to 'be acted upon by air passing from the enclosure, a controller associated with said humidostat and a motor-driven fan operatively connected to said controller, said humidostat having a' wet bulb thermostat, a thermostat and connection between the same, said connection being operathermostat is varied by air leaving theenclosure.
8. In an' apparatus for controlling temperature and humidity within an enclosure, means for controlling .the volume of air forced intol the enclosure includinga humidostat positioned to be acted upon by air passing from the enclosure, a controller associated with said humidostat and a motor-driven fan operatively connected to said controller,v said humidostat having a wet bulb thermostat, a thermostat and a connection between the same, means to operate the controller and means to vary the relation between the connection and controller' actuating means.
9. A method of conditioning air, consisting of passing all of the air to be conditioned through a chamber in which a cooling medium is located and controlling the temperature and/or relative humidity-of the air by varying the area of said cooling medium exposed to contact with the air through the medium of interacting devices responsive to the temperature conditions before and after the air has passed through the chamber. A
10. A method for conditioning air in a ventilating system, consisting of conducting the air.
LAWRENUE D. McDNALp.-
' CERTIFICATE l0F CORRECTION. Patent No. 2,110,161. Merch 8, 1958.
LAwRENCE D.; lMcDQmLt.
It is hereby certified that. error appears in the print'edspecification of the abover numbered patent requiring crrection aus fellows: Page 2, first column, lines 5 and L, strikefout 'the words "along said paths and insert the same after "travels" and before the period 1n 13m@ 11V; 'and that the said Letters Patent shouldbe read with this corection 'therein that the' same may conformto the record o'l the `cese in the Patent. Office.
Signed and sealed this 22nd day of November, A. D. 1.958.
Henry Van Arsdeie (Seal) Acting ('JommissLene.I` of Patents.
US486122A 1930-10-03 1930-10-03 Air conditioning Expired - Lifetime US2110164A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963461A (en) * 1974-09-18 1976-06-15 Gamewell Mechanical, Inc. Humidity control system with apparatus for removing combustible dust particles
US20100000724A1 (en) * 2002-11-27 2010-01-07 Hovalwerk Ag Method and device for cooling circulating air

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963461A (en) * 1974-09-18 1976-06-15 Gamewell Mechanical, Inc. Humidity control system with apparatus for removing combustible dust particles
US20100000724A1 (en) * 2002-11-27 2010-01-07 Hovalwerk Ag Method and device for cooling circulating air
US8038129B2 (en) * 2002-11-27 2011-10-18 Hovalwerk Ag Method and device for cooling circulating air

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