US1760086A - Heater - Google Patents

Description

Patented May 27, 193

UNITED- 4s'rxrss 'ISRAEL L. PUTNAM, OF YUBA CITY, CALIFORNIA HEATER Application led February 4, 1929. Serial No. 337,355.

rIhis invention relates in general to an air heater of the hollow vertical type, preferably using gas as a heating medium, ,and has more particular reference toa light sheet metal vertical type of heater having a burner at the bottom between two vertical shells or pipes which are connected at the top to give a large heating surface and to induce a natural flow of air through the heater.

One of the principal objects of the invention is in the provision of a simple, inexpensive, efficient heater ofthe vertical type which occupies little'ioor space and causes a natural draft of air which becomes heated as it passes throughthe heater in the same direction as the heat or gases from the burner.

A further object of the invention is in the provision of a compact heater comprising tubular shells spaced apart at the bottom and connected at the top to form a decreasing passage which maybe provided with one or more baffles to retard the flow of the heat or gases from the burner at the bottom. Another Vobject is in the provision of a 'heater of this type which is adapted to be secured to a wall or supported from the ground at a distance from a wall. Other objects of the invention will appear hereinafter, the drawings illustrating a preferred embodiment of the invention.

In 'the drawings, Fig. 1 is a perspective view of a heater of the wall type constructed in accordance with the principles of this invention; and Fig. 2 is a perspective view of a floor type of heater with parts broken away for clearness.'

In many t pes of heaters using oil, gas or the `like'as a eating element, the path of gas or heat from the burner is so short that the full heating effect is not obtained.y This is also true of those heaters in which the burner is located at the center of a relatively large 'fire boX with a short passage to the discharge flue. The present invention overcomes these diiiiculties by providing a relatively long and narrow path, with baffles in it if desired in which the heat or gases from the burner are confined between relatively narrow thin walls, gradually converging, and preferably made of relatively thin quickly radiating material such as sheet metal which will give off the heat on both sides of the sheet of gases, preferably in a circular form and in a direction the saine as that of the normal passage of the gases themselves.

Referring more particularly to the drawings this heater comprises an inner shell or pipe 4 and an outer shell 5 slightly largelthan the pipe t at the bottom but joined to it at the top, making with it a circular passage gradually converging from bottom to top. The inner pipe 4 is preferably of uniform diameter and the outer shell frusto-conical and the same effect may be produced by making the outer shell uniform in diameter and the inner pipe of inverted frusto-conical form. i y

Between the two shells 4 and 5 at the bot-- tom is a burner for oil, gas or the likewhich comprises a pipe 6 with a number of burner outlets or nozzles 7 controlled by an outside valve 8. Between the shellsy and spacing them apart may be one or more baffle rings 9, eachocoinprising a ring of lsheet Vmetal with tongues 10 and 11 cut in the outer edge thereof and bent oppositely,y thereby tending to deiiect the heat and gases in a spiral manner in the heating passage. Y

Connected through the outer shell adjacent the top thereof is a horizontal vent pipe 12 .having a vertical pipe 13 connected thereto with a removable cap or thimble 14 at the `bottom for removing condensation or dirt l from the vent pipe.

When securing this heater to a Walla sheet metal guard 15 is attached to and vspaced from the outer shell by metal brackets V16 and 17 so that a sufficient `air space will be provided between the heater and the guard plate to prevent undue heating of the wall.` In the iioor type of heater shown in Fig. 2 the inner pipe 4 may be extended below the outer shell and the 4lower edge turned upwardly to form a flange 18, andthis lower projecting part is provided with. a number of openings 9 19 for admission of air thereto. If the outer shell is also extended to the same base, a number of pipe connections will be required between the inner and outer shells at the bottom to admit air to the inside of the pipe 4.

At the bottom of the outer shell is an opening 2O by means of which the burner is lighted, the amount oi heat being controlled by the valve 8.

In this heater the heat or gases from the burner pass from the bottom to the top, as diverted by the battle rings and in a thin circular ring which gradually diminishes in size so that both the inside and outside walls are directly heated and present a large heating surface for direct Contact and radiation ot heat to the surrounding and enclosed air. This will cause a natural circulation of air through the inner pipe from bottom to top in the same direction as the heated gases from the burner and the direct contact of the air with the thin heated'sheet metal through a a path of considerable length will cause a direct transferrence oit' the maximum heat from the metal to the air. This heater is adapted for inside and outside use, and wherever used it operates etiiciently to cause a vnatural circulation of heated air both inside and outside of the heater.

I claim :y

l. `A heater comprising inner and outer tubular members spaced apart at the bottom and one inclined toward the other at the top to form a heating chamber gradually diminishing toward the top, and the inner member extending below the outer one and forming the support upon which the heater rests, and heating means at the bottom between the members.

2. A vertical tubular heater comprising inner'and outer shells connected at the top and openv and spaced apart at the bottom, one of thefshells being frustosconical in shape to form a heat chamber diminishing in size toward the top, the inner shell being perforatedat the bottom and forming the heater support, anopening in the outer shell adjacent the top, and heating means at the bottom between the shells.

3'. A tubular sheet metal heater comprising inner and outer shells connected together at the top and spaced apart at the bottom, the inner shell extending below the outer one and *forming the bottom support and being of uniform diameter and the'outer shell being truste-conical in shape with its base at the bottom to form a gradually diminishing heating chamber, an outlet at the top of the outerrshell, and heating means at the bottom between the shells. I

4. A verticalsheet metal heater comprising inner and outer shells connected together at the top and spaced apart at the bottom, one of the shells being inclined toward the other to form a heat chamber between them which gradually diminishes in size toward the top', detlecting battles spaced apart and disposed between the shells intermediate the top and bottom, a burner at the bottom between the members, the inner shell supporting the outer one above the lower end of the inner shell and a flue at the top of the outer shell.

5. In a vertical tubular heater, a pair of shells, one within the other connected at the top and spaced apart at the bottom to form a ring-shaped passage, the inner shell extending below the outer one and forming the heater support, a burner between the shells at the bottom, an outlet for the chamber at the top, and battlesy inithe passage comprising ring-shaped disks with circumferential tongues bent oppositely to deflect the heat in its passage from the bottom to the top of the chamber.

6. A vertical tubular heater comprising an inner and outer shell Secured together at the top and spaced apart at the bottom to form a yring-shaped heating chamber having an outlet at the top, a ring burner disposed be-v tween the shells at the bottom, anda plurality of battles spaced apart between the shells intermediate the top and bottom with tongues to cause a spiral movement of the heat in the chamber as it passes from the bottom to the top thereof.

7. A vertical tubular heater composed of sheet metal, shells secured together at the top and spaced apart at the bottom forminga heating chamber gradually diminishing'in size toward' the top, the inner shell resting on its bottom and having perforations near the bottom forming Ia free passage for air in the direction of movement of heat therethrough,

a ring burner between the shells at the bottom, spiral heat deiiectors spaced apart between the shells intermediate the top and bottom, and an outlet fory the outer shell adjacent the top.. i

8. ln a vertical tubular heater of the class described, a pairof shells secured together at theJ top and spaced4 apart at the bottom forming a ring-shaped. heat passage, the

`outer shell resting on its bottom and providing an air admission space at the bottom of the outer shell, a ring burner atthe bottom between the shells having means outside of the shells for controlling the supplyoffuel thereto, and thel outer shellbeing provided with an opening adjacent the bottom for -iia lighting the burner from the outside thereof.

9. ln a vertical tubular heater of the `class described, a pair of sheet metal shells oo nnected together at the top and spaced apart at the bottom to form a heat' chambergradiially diminishing in size toward the top,J the inner shell extending below the outer one and resting upon its bottom to provide an air admission space around the bottom of the outer l shell and also having air admission ports adi* jacent the lower end, a` burnerl betweenl the shells at the bottom, a discharge vent cominunicating through the outer shelly at the top, a wall guard for the burnery having spacing brackets attached Lbetween the outer shell and the guard to hold the burner a predetermined distance away from the wall to which the guard is attached.

10. In an upright tubular burner of the class described, a pair of shells secured together at the top and spaced apart at the bottom, forming a circular heat chamber gradually diminishing in size toward the top, a burner at the bottom between the shells, the inner shell extending below the outer one and resting upon its bottom to provide an air admission space around the bottom of the outer shell and also havin air admission ports adjacent the lower en and the upper end of the inner shell being open to allow heated air to escape therefrom.

ISRAEL L. PUTNAM.

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