US2000112A

US2000112A - Heater

Info

Publication number: US2000112A
Application number: US663504A
Authority: US
Inventors: Wheller Harry Stewart
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-03-30
Filing date: 1933-03-30
Publication date: 1935-05-07
Anticipated expiration: 1952-05-07

Description

May 7, 1935. I H. s. WHELLER I 2,000,112

HEATER Filed March 30, 19:55 4 Sheets-Sheet 1 I INVENTOR Harry .gl'ewm't Wile/ er Y B H. S. WHELLER May 7, 1935.

HEATER Filed March 50, 1933 4 Sheets-Sheet 2 INVENTOR gzes'wcuit W/zeller- A ORNEY May 7, 1935. H. s. WHELLER 1 HEATER Filed March 30, 1933 4 Sheets-Sheet 3 INVENTOR Harg .gtewart Wile/[er ZTTORNEY May 7, 1935. l-lys. W-HELLER 0 2,000,112

HEATER Filed March so, 1953 4 Sheets-Sheet 4 HarryfiteMzFfW/ef Patented May 7, 1935 UNITED STATES. PATENT OFFICE 28 Claims.

This invention relates to heating devices, and particularly, to that type in which air is forced by a fan through a heater, and the thus heated air then discharged through nozzles or outlets into a room.

Heretofore, the discharge outlets on such heat- I ing devices have been stationary, resulting in the discharge of the heated air to the same part of the room and thereby directinga blast of warm air continuously in the same direction.

Adjacent and alternate columns or strata of hot and cold air throughout the room are thereby produced by the previously known heaters, with resulting unequal heat distribution. Mixing of the heat and cold air largely depended hitherto upon convection air currents resulting from the temperature differences in difierent parts of the room, and to some extent, upon circulation of the heated air due to the initial velocity produced by the discharge from the outlets.

In order, therefore, to assist circulation of and to mix the heated air with the cooler air, it has been customary, heretofore, to discharge the air from such heaters at a comparatively high velocity. This high discharge velocity caused penetration of the heated air into the outermost portions of the working area and induced movement oi. air from the upper portions of the room. Persons in the path of the comparatively high velocity warm air stream become overheated, and are greatly discomforted thereby, while persons in other parts of the room are comparatively cold.

My invention overcomes this inherent disadvantage hitherto encountered while, at the same time, retaining the desirable high velocity discharge. This is done by direct-ing the heated air discharge outlets continuously to successive parts of the working area. Streams oi. warm air are thereby directed at intervals to all given points in the working area, and no point receives a continuous blast of warm air as is the case with previously known heaters.

- My invention contemplates the provision of simple and efllcient means for thoroughly mixing the heated air as it issues from the heater outlet with the cooler air 01' the room, thereby eliminating adjacent alternate columns or strata of hot and cool air and producing a uniform air temperature throughout the room.

My invention further. contemplates the provision of a continuously rotatable discharge outlet and means for rotating the same whereby heated air is continuously discharged downwardly and outwardly in the proper direction successively to all parts or the room and thereby uniformly difi'used throughout theentire working area.

The various objects of my invention will be clear from the description which follows, and

from the drawings, in which, 5

Fig. 1 is a front elevation and partial section of my new heater, showing the continuously rotatable outlet and the means for continuously rotating the same. I

, Fig. 2 is a top plan view of the same, the heater 10 being omitted to expose the underlying parts.

Fig. 3 is a partial vertical section on an enlar'ged scale of a portion of the driving means.

Fig. 4 is a view similar to Fig. 1 of a modified form of my improved heating device. 15

Fig. 5 is a to'p'plan view, similar to Fig. 2, 01' Fig. 4.

Fig. 6v is a front elevation and partial vertical section of another modified form of my improved heater.

Fig. 7 is a horizontal section of the same, taken on the line 1-1 of Fig. 6.

Fig. 8' is an enlarged front elevation of the means for controlling the driving vane shown in Figs. 6 and 7.

Fig. 9 is a front elevation and partial section of a further modified form of my improved heater.

Fig. 10 is a horizontal section of the same, taken on the line 10-10 of'Fig. 9. l

Fig. 11 is a view similar to Fig. 9 of a further modified form of my improved heater.-

Fig. 12 is a horizontal section of the same.

In that practical embodiment of my invention which I have illustrated by way of example, in Figs. 1 to 3 inclusive, the heater casing I0 is preterably suspended overhead as to the ceiling of a room in any desired position and in a manner. well known in the art and which therefore need not be described in detail. Itwill be understood, 40 however, that my invention may be applied to any type of heater, as for example, a wall or' floor type, and that I do not intend to limit myself to the specific structure illustrated.

To heat the air drawn through the casing by the Ian II, the heating tubes l2 are secured to the steam and return headers B, which are fastened in the casing by means of the key plates ll, preferably welded to each end or the headers. The headers may be drilled and machined for the reception of the heating tubes 12, which are secured thereto by any suitable means, as for example, by a compression union.

In order to increase the heating capacity of the tubes, a; series of closely spaced flatflns ll, 5

arranged preferably with their greatest dimension in the direction of air flow, are forced onto the tubes. One or more discharge outlets I6 may be provided, through which the heated air is discharged in a generally downward direction and at a comparatively high velocity into the outer air of the room. Said outlet or outlets l6 communicate with the interior of the casing l0, and are suitably mounted for continuous rotation, as willbe later pointed out.

The motor l8, which is secured to the casing III as by means of the arms l9, and which drives the fan mounted coaxially therewith, is insulated from the heated air passing, through the discharge casing by the crown member i1 and is thereby protected against possibility of damage from exposure of the motor to heat. Said arms I9 are stationary and are suitably secured tothe casing l0.

To provide means for thoroughly mixing the heated air with the cooler air in the room, and for insuring continuous distribution of heated air successively to all parts of the room, I rotatably mount the air discharge casing 20 on the heater casing in and provide means for rotating the discharge casing. Said casings are preferably arranged coaxially of the motor shaft 22, and of the fan r The discharge casing 20 comprises the preferably upright annular wall 24, which is provided with an uppermost horizontal annular flange 23 which rests on'the series of spaced rollers 25, whereby the casing 20 is revolubly supported, said casing terminating in the discharge outlets I6. Each of the rollers 25 is secured to the heater casing In or to an extension thereof, by means of a pin or stud 26. Secured to the upright wall portion 24 of the casing 20 in any suitable manner, as by rivets, bolts or welding, is the annular angle member 21, on which rests one flange of the second angle member 28, said members being suitably secured together.

- The verticalflanges of the angle member 2% is in turn secured to the discharge outlets i6 to secure the outlets to the remainder of the casing and to permit rotation of the entire casing, i eluding the outlets, as unit.

While I have shown the discharge casing with 4 four discharge outlets, circumferentially arranged on the casing 90 apart, as shown in Figs. 1 and 2, it will be understood that one outlet as in Figs. 4 and 5; or two outlets as in Figs. 6 and '7, or any number of outlets desired may be provided instead, as may be found convenient or desirable, and that said outlets may be arranged at the same inclination or at different angles. as illustrated in Fig. 1.

Air is drawn over the finned tubes l2 by the fan II, and is then discharged through the outlets |6, which are continuously rotated by means which will be later described. The heated and conditioned air is thereby given a rotary motion in a generally downward and outward direction.

The rotation of the discharge casing insures the continuous distribution of heated air continuously to all parts of the room successively, by the production of a continuous rotating stream of heated and conditioned air spreading downwardly and outwardly, and which, because of its motion, assumes a spiral form, penetrating the cool air in the room, mixing thoroughly therewith, and thereby producing a uniform air temperature throughout the entire extent of the room. A considerable saving of fuel is thereby made possible.

' I The means for operating the rotatable. discharge outlets may take, a number of different forms, a few of which have been illustrated by way of example. For instance, the separate and independent motor shown in Figs. 1 and 2 may be employed in connection with suitable connecting mechanism, or the fan motor and connecting drive shown in Figs. 4 and 5 may be used, or the .reaction vane type shown in Figs. 6, '7 and 8,

and Figs. 11 and 12 may be used.

In that form of my invention illustrated in Figs. 1 and 2, the casing 20 is rotated by a separate and independent motor I which is secured to the heater casing H1 in any suitable manner,

as for example, by means of the brackets or hang-' ers 8 and 9. The motor frame is provided with the integral casing 30, enclosing suitable reduction gearing such as a worm and worm wheel, which gearing is operatively connected to the friction roller 2| on the driven shaft 3|, and engaging the upper surface of the flange 23. The speed at which the discharge casing is rotated is predetermined by the speed of the driving motor I, the reduction ratio of the reduction gearing and the diameters of the friction roller and flange 23 and may be varied between any desired limits by change of motor speed as by a rheostat, if desired. The roller 2|, by reason of its frictional contact with the flange 23, rotates the outlet casing on the supporting rollers 25. Depending from the heater casing are the. angle brackets 32, the upright arm of each of which may be utilized to support the pin or stud 26 for the roller 25, and the horizontal arm 33 of which receives the vertical roller pin or stud 35. Rotatably mounted on the respective vertical pins 35 are the lateral rollers 36, which take up any lateral play or displacement of the discharge casing and thereby prevent -material vibration, as well as assisting in reducing the friction against rotation. This method of supporting the discharge casing also results in comparatively noiseless operation of the rotating member.

While I have shown the discharge casing and outlets driven by a motor through reduction gearing and a friction pulley, I do not wish to limit myself thereto, as it will be understood that the motor may rotate the discharge outlets by means of a direct gear drive on the casing, or a belt and pulley or chain and sprocket or by any other suitable and well known driving mechanism.

The stationary crown member I! above the fan motor 8 cooperates with the lower inner rotating wall 38 to form the inner part of the discharge outlets It, the axially disposed and stationary annular ring 39 on the lower perimeter of the crown member cooperating with the rotating annular ring 40 on the upper and inner perimeter of the discharge casing to present an air tight sliding joint between the stationary crown member and the rotating outlets. If desired, friction rollers or ball bearings may be suitably secured to the crown ring 39, thereby supplementing or replacing the rollers 36 in providing lateral sup,- port for the discharge casing in its rotation.

In order to deflect the heated air as it issues from the discharge casing at any angle to the vertical, each discharge outlet may be provided with an air diffuser vane or baffle 42, which may be secured thereto in any suitable manner as by means of the bolts 4|. Said bolts permit adjustment of the vanes to any desired angle. In oper-- outlet or outlets IS. The heated or conditioned not become overheated owing toits protectionby the crown member.

Where the discharge casing is provided with more than one discharge outlet, as in Figs. 1 and 2, each outlet may be directed at a difierent angle to the vertical so that the heated air as it is discharged from each outlet, is directed toward successive parts of the working area outwardly from the heater to the outermost portion of said area. For example, the discharge outlet I may be directed downwardly at a comparatively small angle to the vertical, the next outlet I62 being directed downwardly away from the heater at a greater angle to the vertical, the third outlet at a still greater angle, and so on.

Continuously swirling columns of heated air,

.increasing in diameter as the distance from the to the outer limits of said area, thereby assist-' ing penetration of the heated air to the outermost parts of the area. If desired, the angles of inclination of the discharge outlets may be so arranged to form contiguous or spaced columns of heated air.

Referring now to Figs. 4 and 5, I have shown a modified form of my invention, in which the continuously rotatable outlet is driven by the fan moter 43, making it unnecessary to provide a separate driving motor.

It will be understood that the fan H, in this case, being above the heater casing instead of below it, as in Fig. 1, is in reversed position relatively to the fan of Figs. 1 and 2 to drive the air downwardly through the heater coils. The fan motor is secured to the heater casing by means of the arms 51 and drives the pulley 41 on the motor shaft. The pulley 44 secured to the count er shaft 45 is driven by the belt 46 from the drive pulley 41.

A roller 49 on the counter shaft 45 is frictionally engaged with and drives the roller 55 on the parallel shaft 5|. The friction roller 52 on the same shaft 5| engages the cylindrical surface of the annular flanged wall or-skirt 53 to cause rotation of the outlet casing and the outlet carried thereby.

The counter shafts 45 and 5| are suitably supported on the heater casing as by means of the journal 54 and the brackets 55, respectively. The wall or skirt 53 is suported for rotation relatively to the heater casing It! by rollers 25 in the manner previously describedin connection with Figs. 1 and 2.

While I have shown a discharge casing having a single discharge outlet 56, in connection with the present description, it will be understood that any desired number of outlets may be provided.

Where, as in this case, a single discharge outlet is used, I prefer to secure the motor above the heater casing ill in order that it is not exposed to the stream of hot air, as would be the case' if the motor were secured under the heater casing and therefore, in the discharge casing itself.

The discharge casing is rotated by the fan motor and intermediate pulley. Air is simultaneously forced through the casing over the heating tubes by the fan, and the heated air discharged through the rotating outlet. The heated air is thereby given both a downward and rotary motion and is discharged continuously to successive parts of the working area in a manner similar to that of the multi-outlet discharge, casing shown in Fig.1.

It will be understood that for the friction pulleys shown, may be substituted a direct gear drive, friction rollers, chain and sprocket or other suitable means for operatively connecting the fan motor to the rotatable discharge outlets.

Referring now to Figs. 6, 7, 8, 11 and 12, I have shown another form of my invention designed to eliminate the use of mechanically operated parts for rotating the discharge casing.

In this form of my invention, one or more suitably curved reaction vanes 59 are secured adjustably or fixedly to the discharge casing in the path of the stream of heated air. The velocity of the stream creates a reaction pressure on the vanes, tending to forcethe vanes out of the path of the stream and thereby rotating the discharge casing. As illustrated, the vane 59 is adjustable, but it will be understood, without further illustration, that the vane may, if desired,'be fixed to the discharge casing, in which case the adjusting means shown may be omitted.

The flange 60 of the reaction vane is adapted to conform to the shape of, and to lie against and in pressed engagement with the inner surface of the-discharge outlet 6|.

A preferably curved face 52 is formed integrally with and at right angles to the flange 6D and is positioned at any suitable point in the discharge outlet, extending generally in a radial and downward direction. It will be understood that the face 62 may assume any desired form, forexample, a parabolic curve, though a plane surface, or a combination of plane and curved surface or two plane surfaces at any desired angle to each other may be used, if desired, as will be obvious to those skilled in the art.

It will be apparent that the'reaction force of the air on the vane will be determined by the angular position of the face 62 relatively to the path of the air. the minimum force resulting when the face is positioned substantially parallel to the air path, and the maximum force resulting when this face is positioned in the path of the air 'at some angle thereto. The speed of rotation of the discharge casing will therefore depend on the position assumed by the reaction vane, but where it is fixedagainst adjustment, the speed of rotation of the discharge casing cannot be varied otherwise than by changing the velocity of the air stream.

The means for adjusting the speed of rotation of the discharge'casing between desired' limits will now be described.

The reaction vane 59 is pivotally secured near one of its ends, preferably the lower end, to the discharge casing by means of the hinge pin 63, which is fixed to the vane and movable therewith, the other end of the vane being movable for purposes of adjustment. To control and guide the movable end in its movement, the spring-pressed locking pin 65 extends through the slot 64 provided in the discharge casing and ment of thevane, but nevertheless retaining the.

vane in adjusted position "under the influence of the spring thereon, and the friction resulting from the pressure of the springfl5 which resists movement of the pin in the slot.

On the hinge pin 63 is fixedly mounted the lever 66.- At each end of said lever is suspended a manipulating cord, chain or rod as 61. When the proper one of the members 61 is manipulated, the lever 66, together with the hinge pin 63 and the vane fixed thereto, are rotated into the desired position in the path of the air stream to impart the desired speed of rotation to the'discharge casing.

In order to rotatably secure the discharge casing 58 to the heater casing 68, the spider arms 69 are suitably secured to one of the annular flanges III] of the angle member I0 depending from the heater casing. The discharge casing is provided with a corresponding flange II slidably abutting against the flange I10 whereby a comparatively air-tight rotatable union is effected. Journalled in a suitable hearing at the intersections of the spider arms 69, is the shaft I2, which is provided at'its lower end with a suitable thrustbearing such as a ball or roller bearing or the like, and'which shaft passes through the hollow shaft I3 of the discharge casing. A perforated plate I4 provided with suitable extensions secured to the discharge casing near the lower end of the hollow shaft and resting on the bearing or on an enlargement at the end of said shaft I2 in or on which the bearing may be arranged, rotatably supports the, easing on the bearing.

- It will be seen that air is forced by the fan through the heater casing and over the flnned tubes and the heated air is then discharged through the outlets which are simultaneously rotated by the reaction pressure on the vanes caused by the passage of the hot air over these vanes. The rotation of the discharge outlets imparts a downward and rotary motion to the hot air in the manner previously described, thereby thoroughly mixing it with the cooler air throughout the room.

Referring now to Figs. 9 and 10, I have shown a modified form of 'my invention in which the continuously rotatable discharge casing I6 is driven by the vaned member or air turbine 11, thereby utilizing the velocity energy of the heated air stream to provide the driving power, as will be later described in detail.

Secured to the heater l0 and depending therefrom, is the air duct I8, in the form of an inverted truncated cone, and terminating .at its lower end in the annular flange I9.

In order to rotatably secure the discharge casing 16 to, the air duct I8, the annular ring 80, provided with the spider arms 8|, is fixed to the air duct I8 on its inner surface 82. Mounted in the spider arms 8| at their intersection-03 is the preferably vertical shaft 84, which is provided at its lower end with a suitable thrust bearing 85,

' which'may take the form of a ball or roller bearcarries the spider arms 88. The hub 89 is prothe air duct I00.

vided at the intersection of the arms 88 and rotatably supports the discharge casing on the bearing 85.

The air turbine 11, provided with a plurality of reaction vanes or blades is attached to the shaft 9|, which is provided at its lower end with the friction disc 92. While I have shown the reaction blades of the air turbine 11 in the form of a fan, it will be understood thatv these blades may assume any other suitable form adapted to convert the velocity of the air stream into a reaction pressure on the blades.

In order to operatively connect the rotating means to the discharge casing and to support said means in their operative positions, the bracket 93 is suitably secured to the shaft 84 as by means of the lock nut 94. Pivoted intermediate its ends to said bracket 93 is the arm 95, which is provided at one of its ends with the bearing 96, in which is journalled the shaft 9i.

Suitably secured to the spider arms 88 intermediate their ends is the annular wall l03, with the inner surface of which the disc 92 is in frictional engagement.

It will be seen that air is forced by the fan through the heater casing and over the finned tubes and through the tapering air duct.

The air duct assumes the function of a'nozzle directing the air stream generally toward the turbine vanes or blades and increasing its velocity before impingement on the reaction vanes or blades. The velocity of the air stream creates a reaction pressure on the blades, causing the turbine to rotate. The friction disc 92 is thereby rotated, and in turn, rotates the discharge casing, being .held in frictional engagement with the annular wall I03 by means of the tension spring 91. Said spring is fastened at one of its ends to the arm 95 and at its other end, to the bracket 93.

The arm 95 is thereby urged to rotate about its pivot I02 to press the disc 92 at all times against the wall I03 and thereby insure proper frictional engagement of the disc and the wall.

It will be apparent that the heated air as it is forced through the discharge casing causes rotation of said casing to discharge a stream of heated air continuously and in the manner previously described. v

In that form of my invention illustrated in Figs. 11 and -12, the rotatable reaction blades of the air turbine are formed from the spider arms 98, and are secured to the discharge casing 99, whereby said casing rotates with the arms 98 relatively to In this form of my invention, the supporting means for the outlet casing is similar to that illustrated in Figs. 9 and 10, and the description thereof need not therefore be repeated. The spider arms 98, however, assume the function of the blades of the separate air turbine of Figs. 9 and 10, and are suitably formed to utilize the velocity of the air stream as a reaction pressure and to thereby cause rotation of the arms 99 and the discharge casing 99 to which they are secured. It will be apparent that the heated air will be discharged into the room in the manner previously described in connection with the other forms of my invention.

It will be seen that I have provided means'for thoroughlymixing the heated air discharged from heaters 01; this type with the cooler air in the room, thereby heating the room efficiently and economically and producing a uniform temperature throughout its entire extent.

It is apparent that mixing of the air throughout the room by convection air currents is elimicombination, a sta'tionaryheater casing, a plunated by my improved heater, with resulting increase in heating efllciency and attendant lower heating costs and increased comfort to the occupants of the room.

While I have shown a fan of the propeller type, it will be understood that any type of fan may be used such as a centrifugal fan, blower or the like.

While I have shown and described certain specific features of my invention, it will be'understood that I do not intend to limit myself thereto, but intend to claim my invention as broadly as may be permitted by the state of the prior art and the terms of the appended claims.

I claim:

1. In a heater, a stationary heater casing, a heating pipe within the casing, a series of spaced radiator fins carried by the pipe, a motor carried by the casing, a revoluble fan arranged adjacent the casing-and coaxially of and driven by the erally downward and outward, direction and distributed in a continuous stream to all par-ts of a predetermined area successively.

2. In a heater, air heating means, a discharge casing mounted for rotation-relatively to said heating means, a discharge outlet extending downwardly from, and carried by the casing and inclined to the vertical, means for causing continuous rotation of said casing, and means for forcing air in a substantially vertical direction through the heating means and the rotating casing said casing mounted independently of and free of the air forcing-means, whereby a column of heated air is continuously discharged substantially vertically and outwardly from the casing and distributed successively to all parts of the working area. d

13. In a device of the character described, the combination with stationary heating means, of

- an air disturbing: member adjacent the heating means and adapted toeifect an initial movement of air over said means, a discharge casing mounted for rotation relatively to the heating means and the air disturbing member and provided with an air discharge outlet extending from the eas- .ing and means operatively secured to the casing for causing continuous rotation of the casing, whereby the heated air is given a secondary discharge movement by the rotating casing, and thereby distributed successively to all parts of the working area.

- 4. In a device of the character described, the

combination with stationary air heating means, of an air disturbing member adapted to effect discharge movementof air past the heating means, a tapering air duct extending therefrom and mounted for rotation about its central axis relatively to and independently of the air disturbing member, and means for causing continuous rotation of the outlet, the said air duct increasing 7 r the discharge velocity of the discharged heated air.

5.Inadeviceofthecharacterdeleribe'fiin rality of stationary finned tubes secured therein,

a rotatable discharge casing provided with an upright annular wall and having a downwardly directed discharge outlet, said wall terminating ing therefrom, means supported by the heater.

casing for continuously rotating the discharge casing comprising a friction disc engaging said flange, and a motor operatively connected to said disc, and an air disturbing member in the heater casing adapted to efiect an initial movement of comparatively-cool air through the heater, the heated airdischarged through the outlet being given a secondary movement by the rotating discharge casing to distribute said heated air over a predetermined area and in all directions.

6. ha heater, means for generating and heating a stream of air, and means for discharging a rotating column of air: spreading downwardly and outwardly, comprising an air discharge duct rotatably mounted adjacent the heating means and independent of the airgenerating means and in position to receive and to discharge the stream at an increased velocity.

7. In a heater, means for generating and heating a stream of air including a, motor and a fan driven thereby, an inwardly tapering air duct depending from the heater, an outlet casing arranged to receive the stream at one end and to discharge the stream from its other end,

means for rotatably supporting the outlet casing,

and an air turbine arranged in the air stream and' operatively connected to the casing for continuously rotating said casing.

8. In a heater, means for generating and heating a stream of air, a discharge casing arranged adjacent said means an air discharge duct arranged on the casing and projecting therefrom -in position to discharge the stream, a motor,

and means operatively connecting the motor to the casing for rotating the casing on the opera tion of the motor. a 9. In a heater, means for generating and heating a stream of ainincluding a stationary motor and a fan driven thereby, an outlet casing for said stream, an air turbine arranged in the air stream and means for operatively connecting the motor to the casing for rotating the casing relatively to the first-mentioned means.

10. In a heater, means for generating and heating a stream of air, 'a rotatable outlet .cas-

ing for said stream, and deflection means atranged in the'path of the stream and operated I thereby and operatively connected to the casing for rotating said on the operation of said first-mentioned means.

'11. Inaeeiling'heater, acasing adapted tebie arranged adiaoent' the of a room, air heating in"the o'asing, an air discharge casing mounted for rotation relatively to the ceiling casing air duct extending therefrom, and means carried by one of said casings for causing continuous rotation of thedischarge casjusting the angular position of the member in thepathofthestroam.

13. In a heater, means for generating and heating a stream of air, a rotatable outlet casing for said stream provided with a slot, a deflection member carried by the outlet casing, a pin on one end of the member secured to the easing, and a spring-pressed pin extending through the slot and secured to the other end of the member.

14. Ina heater, means for generating and heating a stream of air, a rotatable outlet casing for said stream, an air discharge duct depending from said casing, means for rotatably supporting said casing, a motor, and friction means operatively connecting the motor to the casing for rotating the casing on the operation of the motor.

15. In a heater, a stationary heater casing provided with heating means, means for generating a stream of air through the casing, an outlet casingadjacent the heater casing, means engaging the inner surface of the outlet casing for rotatably supporting the outlet casing, means for preventing lateral movement of the outlet casing during its'rotation, a motor, and means operatively connecting the motor to the outlet casing for rotating the outlet casing relatively to the heater casing on the operation of the motor.

16. In a heater, means for generating and heating a stream of air, an outlet casing rotatable relatively to said means, a pair of opposed Iriction discs arranged on opposite faces of the casing, and means for rotating one of said discs to rotate the casing.

17. In a heater, means for generating and heating a stream of air, an outlet casing rotatable relatively to said means, adjustable deflection means arranged in the path of the stream 01? said stream.

18. In a heater, means for generating and heating a stream or air,-a rotatable outlet casing for the stream, and a curved vane secured to the outlet casing-and arranged in the path of the stream to cause rotation of said outlet casing under the influence of the stream.

19. In a heater, a stationary casing, means for generating and heating a stream of air adjacent the casing, an air duct depending from the casing, discharge means rotatably secured to the air duct, an air turbine arranged in said duct and means for operatively connecting the turbine and the discharge means.

20. In a heater, means for generating and heating a stream of air, an outlet casing arranged for rotation relatively to the said means, and provided with an upright annular wall, an air turbine arranged in the stream and operated thereby and a discin frictional engagement with the wall and operatively connected to the turblue.

' 21. In a heater, means for heating a stream of air, means for generating a stream of air and eflecting an initial movement of the air past the heating means, and means for effecting a secondary movement to the thereby heated air, said tioned in vertical alignment with the air gencrating means, and means for causing rotation of the discharge casing, and means extending from the discharge casing for, directing a rotating column of heated air continuously and successively to all parts of the working area upon rotation of the discharge casing.

22. In device of the character described, means for generating a stream of air, air heating means, air discharge means mounted for rotation relatively to said heating means, means extending from the air discharge means and arranged to convey the heated air from the generating means for discharging a stream of heated air to successive portions of the room.

23. In a device of the character described in combination, air heating means, means for imparting an initial movement of air past the heating means, means for imparting a secondary movement of the heated air at an increased velocity and means for continuously rotating the secondary movement imparting means whereby a column of heated air is directed successively in all directions of rotation of the secondary movement imparting means.

24. In a device of the character described, in combination, heating means, means for imparting an initial movement of air past the heating means, a discharge casing rotatably mounted on the heating means. means for imparting a secondary movement of the heated air at an increased velocity projecting-from the discharge casing and means for continuously rotating the discharge casing whereby a column of heated air is directed successively in all directions of rotation of the discharge casing.

25. In a device of the character described, means for generating a stream of air, air heating means, air discharge means rotatably mounted on the heating means, means for preventing lateral movement of the discharge means during its rotation, and means operatively connected to the discharge means for rotating the discharge means relatively to the heating means.

26. In a heater, means for generating and heating a stream of air, an outlet casing arranged adjacent said means in position to discharge the stream, a motor, means operatively connecting the motor to the casing for rotating the casing on the operation of the motor and means for preventing lateral movement of the outlet casing during its rotation.

27. In a heater, means heating a stream of air, and means forv discharging a rotating column 01' air spreading downwardly and outwardly, comprising an outlet rotatably mounted adjacent the heating means and in position toreceive and to discharge the stream and means to prevent lateral displacement of the outlet during its rotation.

28. In a heater, means for generating and heating a stream of air, and means for discharging a rotating column of air spreading downwardly and outwardly comprising an outlet rotatably mounted adjacent the heating means and in position to receive and to discharge the stream and means secured to the outlet and arranged in the path of the air stream for. deflecting the said air stream to thereby urge the outlet to rotate.

HARRY STEWART WHELLER.

tor generating and