US1339303A - Vaporizing device - Google Patents

Description

A. w. THOMPSON AND E. w. COMFORT.

VAPORIZING DEVICE.

APPLICATION FILED mm. la. ma.

Paten ted May 4, 1 920.

2 SHEETS-SHEET 1- Fig.1.

A. W. THOMPSON AND E. W. COMFORT. VAPORIZING DEVICE.

APPLICATION man MAB-18, ma.

1,339,303. Pate ted May 4, 1920.

2 SHEETS-SHEET 2.

Fig.5.

32 a 32 as as ea 3 $1 '27 3 5 '14 U/ '13 a 75 '15 s- 6 \nvenio'rs.

Albert W. Thompson Edward W. Comfo'rt Afiys.

UNITED STATES PATENT OFFICE.

ALBERT W. THOMPSON, OF LOWELL, AND EDWARD W. COMFORT, 0F WINCHESTER, MASSACHUSETTS, ASSIGNOBS TO THE G. M. PARKS COMPANY, OF FITCHBURG, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

VAPORIZING DEVICE.

Specification of Letters Patent.

Patented May 4, 1920.

To all whom it may concern:

Be it known that we, ALBERT W. THoMr- SON, a citizen of the United States, and

resident of Lowell, county of Middlesex, and

State of Massachusetts, and EDWARD W. Common, a citizen of the United States, and resident of Winchester, county of Middlesex, State of Massachusetts, have invented an Improvement in vaporizing Devices, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to improvements in vaporizing devices and an object thereof is to provide a more eflicient apparatus operable by a fluid under pressure, a portion of which is to be vaporized.

Another object of the invention is to provide a vaporizing apparatus comprising a fan adapted to produce a current of air through a casing with means for more completely atomizing and vaporizing a jet of liquid and distributing the atomized and vaporized fluid in the path of the current of air so that the current of air issuing from the casing will be supersaturated thereby producing the highest possible elliciency.

More specifically the invention relates to improvements in humidifying apparatus of the general type disclosed in the patent to Cushing and Errick No. 1,160,695 which comprises a casing containing a fan which is rotated by a Pelton wheel propelled by a regulated jet of water, a portion of the water being discharged upon the vanes of the fan 'and in which the amount of water projected against the vanes of the fan is controlled by a regulator operable by changes in relative humidity of the atmosphere in which the apparatus is located.

\Ve are aware that heretofore various types of humidifying apparatus have been constructed in which a jet of water has been projected upon the blades of fans and in which regulation of the Water has been accomplished by diverting a portion or the whole of the water away from the fan blades as illustrated in Patent No. 964,864, Fries and we are also familiar with constructions in which water is supplied to a rotary disk, is thrown from said disk by centrifu al force and projected upon a barrier WlllCl'l serves to break up the particles of water or atomize the same so that the moisturernay be carried off by a suitable current of air, as is illustrated in the patent to Fries No. 947,300, granted January 25, 1910.

We are also familiar with the vortex type of humidifiers in which a fan rotated by an electric motor drives a current of air across the path of a spray produced by a suitable nozzle such as is illustrated in Patent No. 931,845, Comins, granted August 4, 1909, or Patent No. 942,712, Comins, ranted December 7, 1909, No. 908,964, ramer granted January 5, 1909, and No. 996,217, Cramer & Hodge, granted January 27, 1911.

One of the obj ects of the present invention is to provide an improved mechanism for supporting and actuating fans forming a part of these different types of apparatus whereby power will be saved and the proper continuous operation of the humidifier insured.

Another object of the invention is to pro duce a humidifying apparatus which may be of either large or small capacity and capable of installation in any room or compartment which is equipped with the usual service of water under pressure.

Another feature of the invention consists in the provision of a convenient support or attachment for a vaporizing device of the character described in which fluid may be introduced through a supporting push nipple and delivered through another push nipple, said nipples being secured to the apparatus in a manner which will permit easy installation and dismantling of the apparatus.

Other objects and features of the invention will more fully appear from the following description and the accompanying drawings and will be pointed out in the annexed claims.

The drawings illustrate various features of our invention applied to different types of humidifiers.

In the drawings;

Figure 1 is a vertical longitudinal sectional view of a preferred form of vaporizing apparatus embodying our invention.

Fig. 2 is a side elevation of the same,

Fig. 3 is an enlarged detail view of the lower portion of a hygroscopic apparatus for controlling the vaporizing mechanism,

Fig. 4 is a horizontal view on lines 4= -4 Fig. 1 showing the Pelton wheel for driving the fan and vaporizin disk,

Fig. 5 is a vertica sectional view of a different type of humidif ing devices of the character illustrated in atent No. 34:2,(12, Comins, in which the fan for producing the current of air is provided with an improved type of journal embodying our invention and is rotated by a Pelton wheel driven from the same source of water supply as that su lied to the vaporizing jet,

ig. 6 is a horizontal sectional view on lines 6, Fig. 5.

The preferred embodiment of the invention illustrated in Figs. 1 to 4 comprises a base member 1 preferably havinga cylindrical upper ortion and a contracted lower portion 2 with a base 3 forming a receptacle.

he base portion is provided with a plurality, preferably three, of bosses 4 which support upwardly extending sleeved rods 5, said rods carrying upon their upper ends a ring 6 in which the lower end of a casing 7 is seated. The casing 7 preferably is of noncorrodible metal and forms a conduit for the current of air which is to be humidified and also serves to inclose the vaporizing mechanism and prevent unvaporized drops of liq uid from being thrown-out into the room.

The bottom 3 of the base member 1 is rovided with a central upwardly. exten ing boss 8 which is internally screw threaded and supportsa tubular bearing 9 for a shaft 10 which supports a fan and preferably also a disk upon which a jet of liquid to be vaporized is pro'ected.

One of t e principal features of the present invention is to provide a support and bearing for the shaft 10 which will be practically frictionless and in which the hearing will be self centering. The preferred type of shaft and bearing illustrated herein is similar in construction to that of the Rabbeth spindle.

In the construction illustrated herein the fan shaft 10 rests at its lower end upon an antifriction surface such as a hardened plate or ball and is surrounded by a sheathing 1.1 between which and the tubular bearing!) a packing 12 of fibrous material is located. By reason of this construction the yielding qualities of the fibrous backing are such that the centripetal force of the rotating shaft is enabled to maintain the shaft in an ordinary position or in other words the shaft is self centering and its frictional contact with the.

bearing is reduced to a minimum.

.The shaft 10 supports at its upper end a disk 13 upon which a jet of the liquid to be vaporized is projected in a manner which will hereinafter be more fully set forth. The hub 14 of a fan 15 is also secured to the shaft near its outer end and preferably has a depending sleeve 16 telescopicallv inclosing the tubular bearin member 9 and carryin on its lower end t e hub 17 of a Pelton of a push nipple 22 to which the supply pipe 23 is connected. The push nipple may secured in place in any well known manner but for convenience in assemblin a novel mechanism is illustrated herein w ich permits the demounting of the humidifier bythe removal of a singlenut. In this construction another downwardly extending boss 24 similar to the boss 21 is located diametrically opposite to the former and receives a push nip 1e 25.

The downward y extending boss 24 and push nipple 25 are centrally apertured to provide a discharge outlet for the receptacle formed by the base of the casing, an outlet pipe 26 desirably being secured to the push nipple 25. The casing and push nipples are secured together by a bridge piece 27 which is bifurcated at its ends to inclose the pipes 23 and 26 and which rests against the bases of the push nipples 22 and 25.

A stud 28 having a screw threaded end seated in a downwardly extendin boss 29 located centrally of the base of t e casing extends through the bridge piece and is provided at its outer end with a nut 30 which when screwed against the bridge piece serves to press the push nipples into their sockets.

and retain them therein. In order to dismantle the structure it is merely necessary to remove the nut 30 whereupon the base of the humidifier may be at once detached from the push nipples.

It will be obvious that the Water supplied through the pipe 23 is projected by the nozzle 19' against the vanes 18 of the Pelton wheel causing the rapid rotation of the fan 15 and the disk 13 and with the water discharged from the vanes of the Pelton wheel will be caught in the receptacle formed in the bottom portion 2 of the base and will be discharged therefrom through the waste pipe 26.

By the present construction a portion of the Water or other liquid supplied under pressure may be diverted and vaporized by the following mechanism. A rib 31 extends from the boss 20 along the Wall of the casing and terminates in a boss 32 having a central recess 33. A. duct 34 in said rib extends from the hollow chamber in the boss 20 to the chamber 33 of the boss 32. A vertures disclosed in the invention.

tical pipe is seated at its lower end in the boss 32 and at its upper end has a downwardly curved portion which terminates in a nozzle 36 which referably is positioned directly over the axis of the rotatin member or disk 13. The pipe 35 desirab y is of such length that a considerable distance intervenes between the nozzle 36 and the rotating disk 13 so that the jet which is projecte by the nozzle 36 u on the disk 13 will strike it with considerab 0 force. The conjoint action therefore of the force of the impinging jet and the centrifugal force of the rotating member or disk 13 serves to break u the iquid into a fine fountain-like spray w ich is distributed through the casing in the path of the current of air which is generated by the fan 15. Any drops of liquid which remain will of course descend into the rece tacle formed by the base 1 and will be disc arged throughthe waste pipe 26 with the waste water from the lelton wheel.

By this construction the liquid is more thoroughly atomized and more evenly distributed in the path of the current of air produced by the fan than in any of the strucatents heretofore mentioned, the liquid being vaporized and atomized to a condition in which the current of air issuing from the casing will be supersaturated and ,the drops of moisture carried thereby of such in nitesimal size that they will readily vaporize in the room in which they are discharged without droppin upon the floor.

'T he current of air of suflicient strength to the room rapidly an .to distribute it thoroughl throughout said room so that produced by the fan is r by suitab e regulation a predetermined degree of relative humidity may easily be maintained Any well known means such as' those illustrated in the patents above referred to ma be utilized for re lating the amount of iquid delivered to t e vaporizing device but owing to the delicacy and uncertainty of such regulating apparatus a novel form of regulatin mechanlsm forms a part of our This preferably comprises means for diverting the jet of water or liquid to be vaporized in such a manner as to prevent it from impinging upon the disk with sufiicient velocity to form a spray. As illustrated in Figs. 1 to 3 of the accompanying drawings this is accomplished by providing a conduit which will form a by-pass for the uid, the mouth of said by-pass being li adapted to be placed beneath the nozzle 36 and the outlet thereof simultaneously positioned directly over and sfluite closely adjacent to the rotating di 13 so that the li uid will be delivered gently to the disk. lhe conduit which forms the by-pass herein comprises a tube 38 which is attached to su ply saturated air to a vertical rod or tube 39 mounted at its upper end in a suitable bearing 40 secured to the casing 7. At its lower end the rod 39 passes through an aperture in the ring 6 and is seated upon the end of a screw 41 supported b a bracket 42 secured to and extending aterally from the side of the tube 35. The conduit 38 which forms a b -pass' is provided at its upper end with a aterally extending portion 43 having a mouth 44 adapted to be positioned directl beneath and closel adjacent to the nozzle 6. At its lower end the conduit 38 has a lateral extension 45 in the same vertical plane as the extension 43, said extension 45 terminating immediately over the center of the disk 8 and in relatively close proximity thereto.

en in the operation of the device the mouth 44 of the branch 43 of the conduit 38 is located beneath the nozzle 36 all the liquid of the jet from the nozzle will pass into the conduit and be diverted by the branch 43 through the vertical portion 38 and delivery portion or extension 45. The li uid thus delivered in proximity to the disk oes not strike the central portion of the disk with sufiicient force to splash and no material spra is formed but the fluid merely is thrown rom the disk 8 by the centrifugal force of the latter and falls into the receptacle within the base 3 of the humidifying ap paratus, thus the vaporizing mechanism is rendered ineffective.

Any suitable automatically operating means may be provided for positioning the mouth 44 of the conduit 38 beneath the nozzle 36 or removing it therefrom. In the present construction a hygroscopica'lly operated mechanism is illustrated which preferably comprises an expansible element such as a strip 46 of bass wood cut transversely of the rain, connected at its upper end to a screw tireaded rod 47 which passes through a plate 48 carried upon rods 49 extending upwardly from a bracket 50 secured to the outer surface of the ring 6. A nut 51 on the screw threaded rod 47 serves to raise and lower the hygroscopic member. At its lower end the hygroscopic member is connected by a link 52 to an arm 53 projecting laterally from a rock shaft 54 which is (pivotally mounted inarms 55, 56 depen i from the bracket 50. Another arm 57 attached to said rock shaft 54 is bifurcated at.its lower end to receive a stud 58 extending outwardly from the rod 39 which supports the conduit 38.

A stud 59 projecting from the ring 6 in a the path of the arm 57 of said rock shaft serves to limit its movement when the relative humidit is such as to cause suflicient expansion 0 the hygroscopic member to position the mouth 44 of the by-pass beneath the nozzle 11. A spring 60 secured to the bracket 50 and engaging the stud 58 tends normally to rock the rod 38 so as to position the mouth 44 of the conduit or bypass 38 beneath the nozzle 36. By adjusting the nut 51 the hygroscopic member may be so positioned that the expansion of the hygroscopic member at a predetermined degree of relative humidity of the atmosphere surrounding it will ermit sufficient movement of the rock sha t to position the mouth 44 of the by-pass 38 beneath the nozzle 36 thereby renderingthe vaporizing device ineffective in the manner aforesaid.

In the operation of the device the liquid flows freely and constantly through the pipe 35 and the nozzle 36 and is projected by the latter upon the center of the disk 13 with sufficient force to produce a very fine spray which moistens the atmosphere induced into and forced through the casing 7 by the fan 15. When a desired degree of relative humidit is attained which has been predetermine by the setting of the hygroscopic member, the absorption of moisture by sai member elongates the same, thereby permitting the spring 60 to rock the rod 39 so as to position the mouth 44 of the conduit beneath the nozzle and divert and deliver the fluid gently upon the central portion of the disk with insufiicient force to produce a spray thus rendering the vaporizing device ineffective.

In Figs. 5 and 6 we have illustrated one of the typical forms of vortex humidifiers with the features of our invention applied to the same for the purpose of supp ying power to actuate the vaporizing device more economically than in those generally used which are operated b electric motors and also for the purpose 0 extending the usefulness of vortex humidifiers of this type to plants which are not equipped with electrical apparatus, a further object of the invention being to provide a vortex humidifier which can be constructed at a comparativel low cost and installed in any place which has the usual supply of water under pressure.

The humidifying apparatus illustrated herein is of the general type of that illustrated in the atent to Comins No. 942,712 above referre to which comprises a cylindrical casing 61 supported upon hangers 62, 63 which are adapted to be secured to any suitable support. The hangers 62, 63 extend beyond the lower end of the casing and support an inverted conical shaped dri basin 64 from which a waste pipe 65 exten s downwardly.

The outer edge of the drip basin 64 is provided with a ring 66 which forms the lower member of an annular air outlet 67, the uper member of which is formed by an annular bell sha ed member 68 extending rlr-"rnuardlv an outwardly from the lower The casing 61 is provided with a downwardly extending conical bottom 69 which preferably has aseries of baflle plates 70 extending obliquely to the radaii of a central aperture 71. An inner casing 72 preferably of cylindrical form and of approximately the same diameter as the central opening 71 is supported concentrically within the casing 61 so that the lower end of the inner casing 72 is raised above the inclined bottom 69 of the upper casing to provide a space for the current of air which is produced by a fan within the casing in a manner which will hereinafter'be described.

The casing 72 preferably is carried upon diametrically opposite brackets 73, 74 which are connected at their outer ends to jointed rods 75 which are adapted to carry the inner casing outside of the wall of the outer casing when the door 76 of the outer casing is opened in the manner illustrated in dotted lines in Fig. 6 and more fully described in the Comins patent aforesaid. A spray of water is delivered within the inner casing 2 by a nozzle 77 which is supplied through a pipe 78 leading from the ordinary water main.

The construction thus described is of a usual character such as that illustrated in the Comins patent aforesaid but in the apparatus heretofore heretofore constructed such as that disclosed in the Comins patents above cited a current of air was produced within the casing by a fan located above the nozzle 77 and driven by an electric motor.

In our improved apparatus which is illustrated in Fig. 5 the fan 79 is carried upon the upper end of a spindle 80 which is seated at its lower end in a cup shaped socket 81 which preferabl contains a ball 82. The shaft is surroun ed by a sheathing 83 which in turn is surrounded by a casingm84 of fibrous material which intervenes tween the sheathing and the shaft and an inclosing tubular bearing 90 which is screwed at Its lower end into a boss 91 extending upward}? from a transverse strut or support 92 exten ing diametrically across the casing and secured to the hangers 62 63. A sleeve 93 secured to the hub of the fan incloses the tubular bearing member and carries at its lower end the hub 94 of a Peltori wheel, the cap sha ed vanes 95 of which are located in the patli of the jet from the nozzle 96 through which water is supplied from the supply pipe 78.

As illustrated herein the nozzle 96 extends laterally from the vertical stem or pipe 97 which is screwed into a boss 98 extendiplg upwardly from the cross piece 92, a shaped coupling 99 introduced into the supply pipe 78 and screwed into the boss 99 to supply water to the Pelton serving wheel from the same sourge as that which tion an inexpensive fan type of vortex humidifier is produced which can readily be ,installed in any place which is equipped with water under pressure.

It is to be understood that the humidifying apparatus shown herein is illustrative merely of devices with which our invention may be utilized and that the invention may be employed in various other forms and types of apparatus and that various changes may be made in structure, relation of parts and in the meaning and scope of the followin claims.

t will also be understood that while the apparatus has been described as ap lied to humidifying devices the principle 0 operation and also the mechanism itself may be utilized for the purpose of adding a vaporized liquid to any gaseous fluid which will absorb the vaporized liquid, for example the invention may be used in connection with apparatus for enriching gases for illuminatinlg pur oses and that the invention may be a( apter for analogous uses. 7

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. A humidifier comprising a casing, means for producing a current of gaseous fluid through said casing, a rotatin member in said casin means for forcib y projecting a jet of iquid upon said rotating member whereby the conjoint action of the force imparted to the jet and the centrifugal force of said rotatin member upon the hquid thus supplied wil atomize and distribute the same within said casin in the path of the current of gaseous flun 2. A humidifier comprising a casing, means for producing a current of gaseous fluid through said casing, a rotatin member in said casin means for forcib y rojecting a jet of liquid axially upon sai rotating member whereby the conjoint action of the force of the jet and the centrifugal force of said rotatin member upon the hquid thus supplied w1l produce a spray and distribute the same within said casing within the path of said current of gaseous fluid.

3. A humidifier comprislng a casing, means for producing a current of gaseous fluid through said casing, a horizontal rotating disk in said casing and means for projecting a jet of li uid downwardly axially upon said disk with suflicient force to cause said liquid to produce a spray, whereby the conjoint action of the force imparted to the jet andthe centrifugal force of the rotating disk upon the liquid thus supplied will vaporize and distribute the same within said casing.

4. A humidifier comprising a casing, a rotating fan within said casing, a rotating disk co-axial with said fan and means for projecting a jet of liquid upon the central 7 current of air the form of a spray within said casing {it of liquid axi portion of said disk whereby the conjoint action of the force imparted to said jet and the centrifugal force of the rotating disk will vaporize and distribute said liquid in the form of a fine spra in the path of the produce b said fan.

5. A humidifier comprising a casing, a horizontalrotating fan within said casing a rotatin horizontal disk co-axial with an of les ameter than said fan, means for projecting a jet of liquid u n the central portion of Said disk where y the conjoint action of the force imparted to said jet and the centrifugal force of the rotating disk will vaporize and distribute said liquid an drops of liquid which are not va will fall into the path of the vanes 0 said fan.

6. A humidifier comprising a casing, a motor within said casing havl a vertical shaft, a horizontal fan mounte u on said shaft, a disk mounted upon said sha means for projecting a jet of liquid upon the central portion of said disk with suflicient force to produce a fine spray.

7. A humidifier comprising a casing, means for producing a current of gaseous fluid through said casing, a rotating member in said casing, means for projecting a jet of liquid axially uponsaid rotatin with sufficient force to produce a ne spray and automatically operable means for rendering said jet inefl'ective.

8. humidifier comprising a casing, means for producing a current of gaseous fluid throng said casing, a rotating member in said casing, means for projecting a jet of liquid axially upon said rotating member with suflicient force to produce a spra and automatically 0 rable means for ren ering the im inging orce of said jet insuflicient to uce said spray without interferin wit the volume of liquid delivered to rotating member.

9. A humidifier comprising a casing, means forproducing a current of gaseous ber in sai casin means for projecting a y upon said rotating memr with sufiicient force to produce a spray and means for rendering the impingin force of said jet insufiicient to produce said spray including a conduit formlng a by-pass adapted to divert the course of said jet and means for automatically controlling the position of said by-pass conduit.

10. A humidifier comprising a casing, means for producing a current of gaseous fluid through said casin a rotating member in said casing, means or projecting a jet of liquid upon said rotating member with sufiicient force to produce a spray and means for rendering the impinging force of said jet insufiicient to produce said spray including a conduit forming a by-pass adapted member I when positioned in the ath of said jet to divert the course thereof and to deliver the liquid closely adjacent to the surface of said member and means for automatically controllin the position of said bypass.

11. humidifier comprising a casing, means for producing a current of gaseous fluid through said casing, a rotating member in said casing, means for projecting a jet of liquid axially upon said rotating member with sufficient force to produce a spray and means for rendering the impinging force of said jet insufficient to produce said spra including a conduit forming a by-pass a apted to divert the course of said 'et but to deliver the same axially ofsai rotating member in close proximity thereto and automatically operable means for introducing said conduit into and removing the same fromthe path of said jet.

12. A humidifier comprising a casing, means for producing a current of gaseous fluid through said casing, a rotating member in said casing, means for projecting a jet of liquid axially u on said rotating member with sufiicient orce to produce a spray and means for rendering the impingin force of said jet insufficient to produce sand spray includm a conduit forminga by-pass adapted to ivert the course of sa d jet but to deliver the same axially of said rotating member in close proximity thereto and automatically operable means for introducing said conduit into and removing the same from the path of said jet including a hygroscopic member located outside of said casing and operably connected to said conduit.

13. A humidifier comprisin a vertical casing, a rotating horizontal an mounted upon a shaft within said casing, a hOIl- 'zontal disk carried by said shaft, a water supply, a conduit having a down-turned nozzle located at a distance from said disk and directed to deliver a jet of liquid upon the axis of said disk, a conduit ivotally mounted upon a vertical axis and. aving a flange provided with a mouth adapted to be positioned beneath said down-turned nozzle, automatic means operable by variations in the relative humidity of the atmos here for positioning the mouth of the branc of said conduitin or removing the same from the 4 path of said jet.

14. A humidifier comprisin a vertical casing, a rotating horizontal an mounted upon a shaft within said casing, a horizontal disk carried by said shaft, a water supply, a conduit having a down-turned nozzle located at a distance from said disk and directed to deliver a jet of liquid upon the axis of said disk, a conduit pivotally mounted upon a vertical axis adjacent the side of the casing and having a laterally extending flange provided with a mouth adapted to be positioned beneath said nozzle in the path of its jet and an outlet adapted to be positioned simultaneously in proximity to the face of said rotating member and automatic means 0 erable by variations in the relative humidity of the atmosphere for positioning said conduit in or removin the same from the path of said jet.

15. humidifier comprising a vertical cushioned casing, a vertical self-centering shaft in said casing, a fan mounted upon said shaft, means for rotating said fan and means for producing a spray of liquid in @he path of the current produced by said 16. A humidifier comprising a vertical casing, a vertical shaft in said casin a tubular bearin surrounding said sha t, a sheathing of fi%rous material intermediate of said shaft and said casing, means for supporting the lower end of said shaft, a

. fan mounted upon said shaft, means for rotating said fan and means for producing a spray of liquid in the path of the current produced by said fan.

17. A humidifier comprising a casing having a base, a vertical tubular bearing secured to said base, a shaft incased within a sheathing of fibrous material rotatably mounted in said tubular bearing, antifriction means supporting the lower end of said shaft, a fan secured to said shaft and having a downwardly extending sleeve inclosing said tubular bearing, a Pelton wheel mounted upon said sleeve, means for projecting fluid upon said Pelton wheel and means for evaporating a li uid within said casing.

18. A humidi er comprising a vertical casing, a vertical self-centering shaft in said casing, a fan mounted upon said shaft, a disk of less diameter than said fan mounted upon said shaft and rotatable therewith and means for delivering a jet of liquid upon the central portion ofsaid disk, and means for rotating said shaft. 110

19. A humidifier comprising a casing having a base, a vertical tubular bearin secured to said base, a shaft incased within a sheathing of fibrous material rotatably mounted in said tubular bearing, a bearing 115 supporting the lower-end of said shaft, a fan secured to said shaft and having a disk of smaller diameter than said fan secured to said shaft above said fan and means for rotatin said shaft.

20. humidifier comprising a casing having a base, a fan rotatably mounted within said base, a water motor within said casing operatively connected to said fan, bosses projecting downwardly from said casing, 125 nipples having central orifices connected to sald bosses and means for supplying fluid to said motor through one of said nipples and for discharging the fluid'from said motor through the other nipple and means for 130 producing a spray of liquid in the path of the current produced by said fan.

21. A humidifier comprising a casing having a base, a fan rotatably mounted within said base, a water motor within said casing operatively connected to said fan, -b0sses projecting downwardly from said casing having apertures provided with diver ent walls, push nipples having central ori ces and provided with convergin outer walls complementary to those of 516 bosses secured to said bosses and means for en plying fluid to said motor through one 0 said nipples and for discharging the fluid from said motor through the other nipple, and means for producing a spray of liquid in the path of the current produced by said fan.

22. A humidifier comprising a casing having a base, a fan rotatably mounted within said base, a Water motor within said casing operatively connected to said fan, bosses projecting downwardly from said casing having apertures provided with divergent walls, push nipples having central orifices and provided with converging outer walls complementary to those of the bosses secured to said bosses and means for supplying fluid to said motor through one of said nipples and for discharging the fluid from said motor through the other nipple, a

bridge engaging said. nipples and detachable means for forcing said push nipples into said bosses.

In testimony whereof we have signed our names to this s eeification.

AL ERT W. THOMPSON. EDWARD W. COMFORT.

Correction In Letters Patent No.1,339.303.

It i hereby eertifiedthat in Letters Patent No. 1,339,303, granted May -4, 1920,

upon the application of Albert W. Thompson, of Lowell, and Edward W. Comfort, of Winchester, Massachusetts, 'for an improvement in "vaporizing Devices, an

- error appears in the printed specification requiring correction as follows: Page 6,

strike out line 75, claim 15, and insert the words casing, 11 vertical mwh'ioncd selfentering; and that the said Letters Patent should be read with this correction therein that the same may conformjo the record 'of the case in the Patent Oflice.

Signed and sealed this 1st day of June, A. D.,1920.

3m M. H. COULSTON,

1115:111 Oommz'uiomr o Pm. 01. 231-33.

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