US1377030A - Heating apparatus - Google Patents

Description

J. s. SHANKS. HEATING APPARATUS.

' APPLICATION. FILED JULY 27.;1916- I 1,377,030. Patented y 3, 1921.

3 SHEETSSHEET I- J. S. SHANKS.

- HEATING APPARATUS.

APLICATION FILED JULY 27,1316- 1,377,030.. A

Pat ented May3 1921.

3 SHEETS-SHEET 3.

Ohio

' ployed. will be U NYE-ED- STAIZES JOHN s. s ren-Ks,

i ATENT lorries.

.013 neuron, OHIO.

HEATING APPARATUS.

Application filed July 27,1916. Serial No. 111,700.

To all w from it may concern:

Be it .known that I; JOHN S. SHANKs, a citizen of the United States, residing at Canton, in the county ofiStark and State of have invented certainnew and. useful Improvements in Heating Apparatus,,-.of which the following is a specification, ence being had therein to the accompanying drawing. i T

My invention relates to improvements, in

heating apparatus, the ,priinaryuobjectaof which is to devise such anvapparatusiemploying natural or artificial gasas a fuel which'will create a .maximum amount of heat with a minimum quantity of ,fuel.& T he invention particularly resides in theconstruction and arrangement of the heating and ventilating elements wherebythe abovenoted object is accomplished.

Another object of the present improvement is to so construct and arrange the heating and ventilatingelements, whereby the flame from the burner, or burners em- .drawn out andextended a great'distance beyond the burner, so; that its heating capacity will be greatly increased.

A still further object of thepresent improvement is todevise such a heating and ventilating apparatus. which. may... be used with slight modifications as a clothes drier; hot air furnace,p garage heater, enameling oven; steam and hot water boiler and heater, or oven for drying cores etc., .for foundry purposes.

A still furtherv object of the present improvement is to devise a burner andrradiator tube connected therewith-wherebythe flame from the burner is drawn a great distance through the radiatortubes,thereby increasing theheating capacity of the burner.

Other objects and advantages of the present ii'nprovements willbe set forth in thefollowing description and drawings, in whi ch T Figure 1 is a fragmentary view of a heating cabinet or inclosure showing my improved burner, radiator tube,and;ventilating plates shown in operative position.

Fig. 2 is a fragmentary vertical, sectional view through the front end of the radiator tube and also through the r-valvelfor the burner. showing in detail the construction of the saidvalve.

Fig. 3 is an end .viewof the burner valve .let. openings.

refer- [showing the position ofthe auxiliary air in- ;Fig. 4 1s a dis-assembled fragmentaryperspective view ofthe. front end.of.one of the .radiatortubes showing the, position and con- Q struction of the burner. shieldand auxiliary air-duct.

ig. 5:. is an enlarged fragmentary per- .spectivewiew ofa modified form of air-duct and air-inlet arrangementxfor, a radiator .tube. i

:Fig. 6,is a diagrammatic view showing .one arrangement of. the ventilating :plates applied, to the bottom of aoheating cabinet or inclosure.

Fig. 7 is a diagrammatic view of a modified form and arrangement of theventilating. plates positioned in relation totheair- V inlet openings.

- Fig. 8, is another diagrammatic. view showing a' modified form and arrangement ofathe ventilating plates-shown. in connection with theair-lnlet openings for the cabinet orinclosure.

Fig; 9 is a fragmentarycperspective,view ,showing radiator tubes arrangedand constructed to; employ. two or more gas burners" for beating them, and also :showing the arrangement of the radiator tubes and air-inlet pipes when theradiator tubes are applied to the inclosure.

Fig. 10 is a fragmentary view of a portion ofone of he ventilatingplates showing the mannenof attaching it to a heating cabinet 01? inclosure.

1 Fig.;' 11 is a perspective view, partly gbroken away, of a heater adapted to be used as agas heating stove and well adapted for vuse-as agarageheater.

side of a heating cabinet or -Fig.'1 2 isa:fragmentary persp'ective view I of. a; radiator tube show ng the sections thereof;arranged to lie adjacent the bottom and sides of aheatingcabinet or inclosure. l Fig. 13is a perspective-view of a heater I .constructed in accordance with; my invention and adapted tobe usedas a; steam or hot .wa e i b -r i 1; All thejapparatus shown in: the drawings are adapted; and constructed to be'usedin a ghea i gtde e mp ey ganimpr v d r g lv burn r, ra i u saa .ventila g ppara s con tr ct 1 t t e.,,-fiam t u n r s neu a gw adistan hrough the radiat r. W19? for heating it. The drawings show the arrangement of the radiator tubes, burners and ventilating apparatus as especially adapted for use either in a clothes drier, as is shown in Fig. 1, or as a garage heater, as is shown in Fig. 11; but it is to be understood that a cabinet or inclosure as shown in Figs. 1, 11 and 13 may with or without minor modifications be used in different kinds of heaters within the scope of the appended claims.

Referring now to the drawings in which like reference numeralsdesignate similar parts, referring first particularly to :F ig. 1, 1 represents a cabinet or inclosure to be heated. The inclosure may be constructed of any suitable material and may be made of any size or shape, which will be better adapted to accomplish the purpose for which it may be employed. In this figure the heating device, which will be hereinafter described, is shown as applied to the bottom of the cabinet, which arrangement would be especially adaptedto and preferably in a clothes drier. The heating device for the cabinet or inclosure 1 comprises a tortuous radiator tube 2, which, as shown is made up of a plurality of sections, in this case consistingof four such sections, numbered on the drawings 3, 4, 5 and 6. The tube, however, may be made of any desired length or have any number of twists and turns, as may be desired, to accomplish its purpose within the inclosure to be heated. In the apparatus here illustrated, the open end of the section 3 of the radiator tube 2 is attached to one of the walls of t ie has;

net or inclosure 1, theremaining sections of the tube resting upon the ventilating plates 7, 8 and 9, which will be hereinafter described; If the ventilating plates 7, 8 and 9, are not employed, however, the sections of the radiator tube may either rest upon the bottom of the cabinet 1, or be supported therefrom upon suitable brackets, or may be supported at the outlet end of the section 6, which end mayof course be attached to the flue or chimney (not shown) since any well-known form of flue or chimney having a damper therein may be employed. A door 10 and door casing 11 are applied to the side of the cabinet 1, which communicates with the end of the section 3 of the radiator tube.

'The radiator tube is shown of rectangular j cross-section, but it is to be understood that this tube may be either round, triangular, or

of any desired shape. Adjacent the front 3 end of the section 3 of the radiator tube a shield 12 is'placed, which shield has side walls 13, and a front slanting wall 1 1, which 7 is provided with a plurality of perforations 15. The shield 12 is shown in detail in Figs. 2 and 4. It is of a height and width less than the height and width of the radiator tube 2, So that a space 16 is left'around the shield 1S in position the radiator tube. The shield has no back or bottom wall. Resting upon the top wall 13 of the shield and lying adjacent the side walls 13 thereof, there is placed an elongated inverted U-shaped member 17, which is of a size to fit over the end 7 2, forms the bottom of the passage through i the member 17, which member rests upon the bottom of the radiator tube 2. Arranged in front of the shield 12, and inside of the door-frame 11, is a burner formed of an open end pipe 19, which will be hereinafter described in detail. This burner is supplied with gas through a pipe 33, controlled by a gas-cock 20. The burner is provided with a mixing valve 18 for supplying air in the proportion required for combustion, and

this air supply may be augmented by opening the door 10 when it is so desired, A further draft for the burner is provided, which will assist in causing a powerful draft through the radiator tube So that the flame acts really like a blast furnace. This air supply consists of a pipe 21, which is arranged beneath the ventilating plates 7 and 9 and above the plate 8, in a manner hereinafter to be described, and has perforations 22 throughout its length, which convey air from the inside of the heating cabinet or inclosure through the pipe 21 and into the passage within the member 17,- through an opening 23 in the bottom of the section of radiator tube 3. All of the air which causes the blast for the burner may be drawn through this pipe 21 when so desired, and in this case the door 10 is closed. @f course it is to be understood tiat the draft is also regulated by the usual form of damper located within the chimney to which the section of tubing 6 is attached, or where'a chimney is not employed, a damper 6 may be located in the end of the member 6, which will assist the draft should the tortuous passage made by the radiator tube be of a very great length.

Attention is called to the fact that the opening 23 is beneath the slanting wall 141, of the hood 12, so that the blast of air drawn in through'the pipe 21 will not come in direct contact with the burner, which, were a shield not employed would tend to retard the force of the flame to the burner or might in some cases extinguish it. The ventilating plates 7, 8 and 9 are arranged two in a direct line spaced above the bot- 1 111 {if t et-1.- lldheld in th P ace beneath the plates7, 8 and 9.

brought in direct contact with by means of brackets 24:, secured at one end 25 to a lip 26 turned down integral with the ventilating plate. The other end 27 of the bracket 2 1 isrs'ecured to theside of the heating cabinet or inclosure 1. As is shown, the ventilating plates 7 and 9 are in a direct line and spaced apart, and between and below them is situated the ventilating plate 8 heldiin amanner similar to the plates 7 and 9. The pipe 21, which is the main inlet pipe for'the'burner 18 passes through the ventilating plate 7 and The apparatus operates as follows:

After the the articles, clothes, cores or any other articles which it may be desired to dry out have been placed within the cabinet 1, thecold and moist air within 'the inclosure is drawn into the p1pe21 up a ainst the burner 19 where it comes in contact with the flameof the burner. The current of air is'deflected by means the hood 12, and directed through the tortuous passages ofthe radiator tube, the draft being, of course, controlled by the tortuous passage and also by the damper 6 which is located-in the end thereof. The flame of the burner 19 also causes a draft of air outside of the member 17, which will heat the outside of the radiator tube 2. A very strong current of air may be caused between the outside of the member 17 and the inside of the radiator tube 2, when the door 10 is opened. Through this arrange ment' it is seen that the moist .air in the cabinet is drawn into the pipe 21 and the burner and thereby becomes thoroughly heated. This heated air is preferably discharged at the end of the radiator tube '2 into net again. Where the radiator tube 2 is found to provide sufficient heat for the inclosure the heated air within the said radiator tube is discharged outside of the cabi-' of the radiator 'tube 2, which has be ome heated in a manner heretofore described.

By locating the draft pipe 21 beneath the ventilating plates 7, S, and 9, in the manner shown and described, the cool descends after the devicehas been started will become pocketed beneath the ventilating plates 7, 8 and 9 and conseqnent be drawn in by the pipe2'1. This air being relatively cooler than the air above the plates 7, 8 and 9, which is always in contact with the radiator tube 2, will cause a greater draft through the pipe 21.v This strong draft of cold-air will in its passa e through the radia r tu e draw ti e-flam an a m s burner 19 has been lighted and of the inclined wall 14 of top of the cabinet. 1

the c ahidinally air which above the portion 31. ly,will

which will of course transmit some of its heat to the outside of'the radiator tube and. assist in heating the outside of the said tube.-, From the foregoing it is apparent that there are two currents of air passing through the radiator tube, one from the outside of the heating cabinet 1, through the door 10 and through the radiator tube outside the member 17 and the other current being drawn into the pipe 21 and inside of the member 17. In this manner the moist air .within the cabinet is thoroughly heated and fresh'air is also drawn in, which is of course more potent in its drying qualities than the air within the cabinet which of course'beeomes dead as it is used over and over. fine is attached to the end of the radiator tube or not, an outlet opening is, of course, provided in the cabinet 1 at'any point, but it is preferably located ata point near the In many cases where the inclosure is small the use of the member'l'? forming the auxiliary air passage will be found unnecessary. -In all cases I where the radiator tube 2 isalso found sufficient the member 17 is dispensed with.

From the foregoing description, it has been pointed out that the open end pipe burner 19 is provided with a valve 18 for supplying its air forcombustion whether the door 10 is open or closed. This valve consistsof a hollow body portion 28, which terminates in an internally screw threaded passage 29 into which is screwed the end 30 of the burner pipe which'extends upwardly and" in through the door casing 11, and-is provided with the open end 18?. This burner is arranged in front of the shield 14;.

Of course it is to be understood that the burner pipe 19 may bemade in a straight line with the'mixing valve in which case the turnin the said pipe is made below the mixing valve. This construction will provide an absolutely uninterrupted.passage of combustible fuel to the burner. The other end of the casing 28'is provided with a longituextending portion 31 having a passage 32 therethrough andinto the outer end of which is fitted; theendof thelgas inlet pipe r The member'28' is of conical form, its greatest'diameter being located The end of-this conical portion is provided with a plurality of openings 34:. Slidably mounted on the outside'of the portion 31 is a member consistingfof a sleeve 35and an annular disk .86, which has a concave face 37 adapted to fit against the end of the conical portion of Whether a ed to be moved in and out on the member 31 and varies the distance between the face of the disk 36 and the face of the conical portion of the member 28, whereby a variated opening is caused between these two members which will lessen or enlarge the passage through which air may pass from the outside in through the openings 34. A set-screw 39 is provided for the purpose of locking the slidable sleeve 35 in any desired position. It is oftentimes found diflicult to V adjust to a fine degree, the exact amount of air for perfect combustion fed in through the openings 34 and for this reason an auX- iliary adjustment is provided. This adjustment consists in providing a plurality of openings 40 through the disk 36, which openings are in a line to-register with the openings 34 in the conical portion of the member 28. Another member consisting of a sleeve 41 and an annular disk 42 is mounted on the outside of the sleeve and this disk is provided with a plurality of openings 43, which are adapted to be thrown in and out of communication with the openings in the annular disk 36 by turning the disk 42. A lock-nut 44 is mounted on external-screw threads 45 on the outside of the sleeve 35 for the purpose of locking the disk 42 in any position in which it is turned. After the air supply for the burner, whether the burner uses artificial or natural gas, is adjusted to an approximate degree for perfect combustion, the disk 42 may be rotated to feed a little more air by throwing into full register or partial register the openings 40 and 43, which will admit additional 7 air into the openings 34, and thence to the burner, as will be readily understood. From the foregoing, it is apparent that the valve is provided with two air-inlets, one through the openings 34, which are con trolled by means of moving the disk 36 toward and away from the end ofthe conical portion of the valve 28, and the other the partial opening or closing of the ports 43 and 40 for supplying air through the openings 34. A burner constructed in this manner and coupled with the ventilating elements as described creates a blast heating flame, which flame can be reduced in volume or intensity or made shorter by cuttmg gas and the volume of the valve. The adjustments on the valve together with the adjustment of the damper in the outlet pipe permits the accurate regulation of the flame and consequently the heat thrown outby the radiating tube.

Reference will now be had to Fig. 5, which shows a modified form of ventilating plate used in connection with the radiator tube. In this form the ventilating plate down the volume of comprises a U-shaped member 46 of a size I to fit around the radiator tube ,2 and leave a small space therebetween. The member 46 may be constructed of a shape and length.

equal to the length of the radiator tube. or maybe made shorter if desired. In this construction a fresh air pipe 47 is employed which draws air from outside of the cabinet or inclosure and discharges it around the radiatortubel 2. This is accomplished by carrying the pipe 47 in through an opening 48 in one side of the member 46 and then extending the pipe longitudinally and below the radiator tube 2, as shown at 49. The section 49 of the pipe 47 is provided with a plurality of perforations 50 to spread the discharge of air. The pipe 47 may also enter through the front of the member 46, as is shown in dotted lines at 51, but in each case the portion 49 of the pipe 47 is arranged at one side of the'center of the radiator tube so as not to interfere withthe air intake opening 23 for the burner 19.

Another modified form and arrangement of ventilating plates are showndiagrammatically in Figs. 6, 7, and 8. Fig. 6 shows three plates 52, 53 and 54, arranged similarly to the plates 7, 8 and 9, as employed in Fig. 2. Fig. 7 shows the use of the three plates 52,53 and 54, but in addition fresh air openings 55 are provided arranged in a line above the plate 52 for admitting fresh air from outside the cabinet or inclosure. In this case the fresh air pipe 47, shown in Fig. 5, is dispensed with. Sometimes in practice it may not be found necessary to employ three plates, but only the two plates 52 and 53 arranged as shown in Fig. 8 also employing the fresh air openings It is to be understood in this connection that the 'U-shaped plate 46 surrounding the radiator tube may beused in addition to the plates 52, 53 and 54, according to the need of greater or less circulation and radiation of air within the cabinet.

Very often ,when the inclosures to be heated are very large it is necessary to employ two or more burners instead of one and a greater length of radiator tube. In this case the structure shown in Fig. 9 is employed. This construction embodies the same radiator tube 2, shield 14 and burner (not shown) as is employed in the construction shown in Fig. 1. In this case, however, a second section or radiator tubing 56 is employed, having one end attached directly below the opening 23 in the radiradiator tube 56, i

radiator pipe 561s shown as arranged for fitting adjacent a side of .the inclosure and the radiator 2 may be shaped similar to the tube 56, or may run at right angles,

to Fig. 1) acrossthe top of the inlt is to beunderstood that any (similar closure.

number of burners may be built up depending upon the amount of heat required.v

Also the fresh air for the entire number of burners is drawn in through the-bottom air opening 23. The air inlet 23 shown above the pipe 57 is made larger than the air inlet 23 in the bottom of the first burner box, the air openings in the second,-'third and fourth, and any number of succeeding burner boxes would be varied depending upon the radiation desired and the distance it is desired to draw the flame out. When a plurality of burners are used additional fresh air may be drawn in through the door 10 when the door is opened or through permanent openings made around the door.

When 1t 1s desired to situate the radiator tubes along the top or bottom and one side of the inclosure, they are arrangedin the manner shown in Fig. 12. Inthis case the burner is situated at the point'59, the other end 60 of the tube being CODIIGCtGCr witha usualform of flue or chmmeywhentlns-1sdesirable or the heated air is discharged d1-- rectly into thecabinet or 'inclosure.

As has been stated heretofore, aedevice employing the general principles of ventilation and the burner and radiator tubes shown herein may with slight-modifications be used asa garageheater, hot water or steam heater and boiler,hot air furnace, or drier for foundry purposes. The device shown in Fig.1 is particularly adapted for" use as a clothes drier, (the bottom of the cabinet not being used).

Reference will'now be had'to Fig. 11', which shows my invention-embodied in a gas heating stove whichis also well adapt-- ed for use as a garage heater, which struc ture, however, canbe used also, as a hot water or steam hereinafterdescribed; This structure comprises a cabinet or inclosure 60, here shown of rectangular shape, mounted upon suitable legs 61, which are preferably made of considerable length so as to place the heater itself and burner thereof ,wellabove the .gasolene, .or

The

heater and boiler, as will be is provided with a vertical par final sectioniterminating in a portion 66 extending through an opening 67 in the top of the inclosure and provided with a suitable damper 68. The portion 66 in this case mayalso be made to'end below the perforations and discharge within the inclosure or cabinet as; is shownandexplained in reference to Fig. 1.. The top and bottom of the large compartment 63' is provided with perforations 69 and 70 respectively, the purposes'of whichwill be hereinafter setforth. The top of thesmall compartment 63 is also provided with perforations 71 and a horizontally mounted ventilating plate 72, arranged near its bottom, but spaced a short distance thereabove. Thi plate 72 is provided with perforations 7 3 arranged at each end thereof The vent pipe 21 for the burner. (not shown) lies directly beneath and against the ventilating plate 72. Besides the usual door '10 at the front end of the radiator tube, another door 7a is provided in the front of the inclosure 60, to

provide means for lighting the-burner and also as a fresh air inlet when it is so desired. The apparatus here described operates as follows: The burner (not shown) is first lighted after opening the doors 74 and 10 and the said doors are then closed. The proper amount of air for combustion is supplied to' the burner through the mixing" valve heretofore described, the compartment 63 getting its air from outside the cabinet through the perforations 71, in the, top thereof. These are'the only airlinlets for supplying air to the burner and they 9' arearranged'in the top. of the heater so that even were the heater set upon the floorwithout the use of the legs 61, the air 'drawninto the burner would come from a point well above the floor and away from any oil or gaseous fumes that might be there. 'The pipe 21 for causingthe blast in the burner receives' its air through the perforations 71 in the top of the compartment 63 and down through the perforations 7 3 in the ventilat-i ingplate 72. When a greater blast is 'de sired the door 10 may be opened and in some cases the door 74: may also be. opened when a very powerful draft is desired. The air in the garage is heated by passing into i the compartment 63, throughthe perforations 69, around the radiator 65 and out through the perforations 7 0 in the top-of the compartment 63. Hot air is also discharged through the end 66 of. the radiator tube which, due to its longpas sage through and ventilating embodied, willbe freed of. all gaseous fumes and odors. This construction of heater may with slight changes be used as a hot water or steam boiler and heater as is shown in Fig. 13. In this case the partition 62 is not employed, and one continuous run of radiator tube 2 is pro-' the tortuous tube and the systemof heating tion are carried in vided which will heat the water passing through the-heater compartment which in this case is the combined compartments 63 and 63. The open end of the section of radiator tube 65 is securely fastened or welded to the outer casing or jacket 1, so that no watercan work out around the edge where it is connected. The partition plates 73 and door 74 are dispensed with and the burner end 66 of the radiator tube 65 is connected to the casing in the manner shown in Fig. 1. Where the air inlet pipe 21 and the burner end 66 of the radiator tube extends without the cabinet they are welded to the casing so as to be airand watertight. In

this case the perforations are not employed and water is admitted into the compartment by tapping and threading a pipe at for admitting water. An outlet pipe 6 is made in a similar manner and the inclosure may then be filled with water to be heated.

The water is heated by coming in contact with the heated radiator 2, through which the gas flame, heat and products of combusthe manner heretofore described.

The general construction of Fig. 1, may be utilized in a hot air' furnace, and in this case the radiator tube may be longer and.

have a greater number of bends, and a plurality of burners and burner boxes may be employed in a manner similar to that shown in Fig. 9..

Attention is called to the fact that when the structure shown in Fig. 1 is constructed to be used only as a clothes drier, the air is changed constantly. The fresh air is drawn in the cabinet through openings, and after rising to top of cabinet, the down draft brings the same heated air back to the bottom or lower part of the cabinet, being drawn in pipe 21 through openings 22, being conducted or drawn into radiator pipe 2 and through the opening 23 as shown in Fig. 9. The air when charged with moisture is converted into heated air as it comes in contact with and is drawn through gas flame. The air is drawn through the radiator 2, into the chimney opening. In this way fresh air is drawn in cabinet or inclosure and the air withdrawn is in accordance with the strength of chimney draft.

Having thus described my invention what I claim and desire to secure by Letters Patent is 1. An improved heating apparatus comprising a housing, a serpentine-shaped radiator tube within the housing, the tube having inlet and outlet ends opening outside of the housing, a burner in the inlet end of the tube, a perforated shield in the inlet end of the tube and in front of the burner, the tube having an air inlet opening in-rear of the shield and communicating inside of the housing.

2. An improved heating apparatus comprising a housing, a horizontally extending radiator tube at the bottom of the housing, ventilating plates below the tube, and a burner in the inlet end of the tube.

3. An improved heating apparatus, comprising an inclosure, a plurality of ventilating plates arranged adjacent one wall thereof, a radiator tube within the inclosure, a burner in one end of the radiator tube, and a pipe arranged below the ventilating plates and supplying air in front of the burner for the purpose described.

4. An improved heating apparatus coinprising an inclosure, a radiator tube therein, a plurality of ventilating plates ar ranged below the said tube, a burner in one end of the tube, and a pipe beneath the ventilating plates and supplying air to a point within the radiator tube and in front of the burner.

5. An improved heating apparatus comprising an imperforate radiator tube, a burner in one end of the said tube, a perforated shield extending transverse the tube and in front of the burner, and an air sup ply for the tube. V

6. An improved heating apparatus comprising a housing, a radiator tube therein consisting of an outer tube and an inner tube inclosed within the outer tube, the inlet end of the inner tube embraced within the outer tube, av perforated shield across the inlet end of the inner tube, and a burner within the outer tube and in front of the I perforated shield.

An improved heating apparatus, comprising a radiatortube having two passages, one passage within theother, a shield closing the front end of one of the passages, a burner in the front end of the radiator tube, and in front of the said shield, and means for supplying air on the opposite side of the shield from the burner.

8. An improved heating apparatus comprising a radiator tube, a deflecting shield in one end thereof, the said shield comprising a body portion having an inclined front wall, side walls, top walls and an open back and bottom, the said radiator tube having an air inlet opening under the said shield, and a burner within the radiator tube and in front of the inclined wall of the shield.

9. Animproved heating apparatus comprising a radiator tube, a deflecting shield in one end thereof, the said shield comprising a body portion having an inclined front wall having perforations therein, side walls, top wall and an open back and bottom, the said radiator tube having an air inlet opening under the said shield, and a burner within theradiatortube and in front of the inclined wall of the shield.

l0. An improved heating apparatus, comprising a radiator tube, a deflecting shield in one end thereof, the said shield comprising a body portion having an inclined front wall, side walls, top wall and an open back and bottom, an inverted U-shaped trough member within the tube and having its top resting on the top wall of the shield, the said radiator tube having an air inlet opening under the said shield and a burner within the radiator tube and in front of the inclined wall of the shield.

11. An improved heating apparatus comprising an inclosure, a radiator tube therein, a burner Within the said tube, a plurality of ventilating plates arranged adjacent the heating mechanism, inlet openings arranged in a line with the top surface of one of the ventilating plates.

12. An improved heating apparatus comprising an inclosure, a radiator tubetherein, a burner within the tube, a plurality of ventilating plates arranged adjacent the radiator tube, the said plates spaced apart but having their edges overlapping, air inlet openings arranged in a line with the top surface of one of the ventilating plates for supplying fresh air to the radiator tube, and the inclosure having an outlet.

13. An improved heating apparatus comthe inclosure having air prising a housing, a radiator tube within the housing having an outlet opening outside the housing, a burner 1n the inlet end of the tube having a valved opening for.

drawing air from outside the housing, and an opening in the inlet end of thetube for drawing moisture laden air into the radiator from inside the housing.

14. An improvedheating apparatus comprising a housing, a radiator tube within the housing having an outlet opening outside thehousing, a burner in the inlet end of the tube, having a valved opening for drawing air outside the housing, and an opening in the inlet end of the tube for drawing moisture laden air into the radiator from inside the housing, and an inlet opening in the housing remote from the moist air opening in the inlet end of the tube for drawing,

thereby creating fresh air into the housing, a circulation of air within thehousing.

In testimony whereof I hereunto afliX my signature in the presence of two witnesses.

7 JOHN S. SEAN-KS. Witnesses:

A. K. DEOKARD, R. R. KESPER.

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