US2391111A

US2391111A - Heater construction

Info

Publication number: US2391111A
Application number: US523826A
Authority: US
Inventors: Leo N Walter
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-02-25
Filing date: 1944-02-25
Publication date: 1945-12-18
Anticipated expiration: 1962-12-18

Description

Dec. 18, 1945. 1., N. ALTE 2,391,111

HEATER CONSTRUCTION Filed Feb. 25, 1944 2 Sheets Sheet 1 v mw 1N ENTOR.

ATTORNEY. Y

1945 L. N. WALTER HEATER CONSTRUCTION Filed Feb. 25, 1944 2 Sheets-Sheet 2 VENT OR. 4 77/ BY m ATTORNEY.

Patented Dec. 18, 1945 STATE-ES PAT opera I 2,391,111

HEA EEC N TRUGTION Le .N-' alter, Oak Glenn, Ill.

Arr i atien. ehrueryza 194.4, Serial No. 523,826

Whims- This, inv ntion .relatesto an improvedheater ensimqtionand has fo -one.ofitsprincipal oh:- l iqls $11. lpl i on of means wherein cool. air.

may .be forced, into; the. central; portion of i the. m xing qhfill bfir vofuacheater and as .apressureis. built up; therein thelheated air inexpelledfrom h:Q .te '-.DQ l 0n.oisthechamben. The improved.

construction which is especially adaptedto be mm mmlei in smallzportable heaters. may. also :be,..bl i; in o la ger units.

Another. object of importance. and advantage residei. in the; provision of. means. .for directing entering; air downwardly. through the central. portion or. the, mixing chamber to the. heating point and then upwardly. along the. outerportion (lithe. chamberand through a. point of. discharge Other objects of advantage and impcrtancewillbecome apparent-as the following detaileddescriptionprogresses references being hadtothe accompanying drawings wherein Figs l-isa vertical section'oi a portable heater which.embodiestheinvention.

Fig. 2 is a. topv-plan-- view thereof.-

Fig. -3 is asectional view taken on line- 3-3 of Fig. 1.

Fig.4 is a sectional view taken online 44 of Fig.1.. 7

Fig.5 is a-vertical sectionof a slightly modified formof-thedevice, parts thereof" being broken away.

Fig. G-is a sectional view taken on the line 6=-6 ofaFige looking in the direction-- indicated'by the arrows;

Fig. 7 -is a detailedview of a portion of-the lower portion of the device shown in Fig. 5;

The reference numeral 10 indicates generally the body of the improved device of this invention. In the preferred'embodiment of the device the ,1body Hi is cylindrical; as is clearly shown in thedrawings. Thelowerportion of the body I llii is provided with a closure j l 2 and the :upper end of the body 60 carries anapertured member Secured to the apertured-- member Hnon the upper end of the body H3: lean electric fan 16-. The fanis positioned to draw air throughthe apertured member I4. and force it downwardly into the body I0.; Secured to theinteriorsur face of the body I llintermediate the endsthereoi is an apertured member [8. The apertured member I8, which is. substantially in the form of..a truncated cone, divides the body ,lfl into an upper.

air receiving chamber 29;; and a lower mixing; chamber 22-. Air drawn into thehody l0.by..the. fan. I6 is forced downwardly. through the charm-. ber 20 and through the truncated cone shaped member iii and into the central portion of the mixing chamber 22; The tendency of this cur rent of air is to continuedownwardly until turned nearthebottom of thechamber, and thence-to travel outwardly and upwardly to the outer surface of the coneshaped member 18 and thence to atmosphere y through a port 2 4.

Positionedon the closure member 1 2 is a heat.

resistant member 26, upon which heating ele-.

ments

28, 28 may be positioned. The heating; elements 28, 28am electrically connected to. a

source of supply through. lead wires 39,- 38,. An

electric circuit in a conduit 32 also extends through a limit switch 34, a starting switch 36 and a thermostat. 38. to the electric fan I6. Manually operated switches 40 ;and 4Z are.also. provided in .the heating and fan circuits.

In operating the improved device of this in.-

vention,

thel'ead wires

30, 30 may be plugged intoa convenient outlet, not shown,, and the manu.-.

ally operated switches 49 and 42 moved to, on. position. In the event the temperature of the room in which the improved device is positioned is below a predetermined'minimum, the portion of the circuit passing through the thermostat 3,8. is closed and the heating elements are immediately energized. As the heating elements warm up the chamber 22, the interior surfacethereof becoming warm activates the starting switch 36;

which upon closing starts the fan [6, Operation of the fan forces air downwardly through the chamber toward the heating elements 23; 28 and,

outwardly through the discharge port 24, as previously explained. In the event the chamber 22' becomes overheated, the limit switch 34' functions to open the circuit to the heating elements without disrupting the fan circuit. Consequently, the continued blast of air entering the chamber quickly lowers the temperature therein to av normal operating range. whereupon the limit switch again closes and re-energizes the heating elements. As the temperature within the space being heated raises the thermostat 38 becomes satisfied and opens the circuits to both fan and heater, thus completing the cycle of operation.

A slightly modified form of the invention is shown in Figs. 5, 6 and 7 wherein the lower portion of the device is slightly altered to accommodate a gas or other heating element. In this embodiment of the device the same reference numerals are used to indicate similar part shown in the preferred embodiment. In the modified embodiment the body In is nested in a cylindrical member generally indicated by the reference numeral 50. The outer wall of the body I is spaced from the irmer wall 52 of the member 50, as is clearly shown in Fig. 5.

Positioned between the spaced walls of the,

nested members In and 50 is a plurality of

baflie plates

54, 54. The baille plates are staggered with respect to their ends so as to alternately form passages over and under each successive plate. Thus a passageway is provided through the space between the nested bodies from an inlet port 55 to an outlet port 58. Consequently heat generated beneath the members I0 and B is conveyed through the passage formed by the

bafiies

54, 54 and is transferred to the lower portion of the body I0.

In the modified form of the invention it has been found advisable to provide the outer surface of the member 50 with an insulated member 68, such as asbestos, or the like, and also to extend the side walls thereof to form a heating chamber 62 in the lower portion of the member.

In operation the modified form of the invention is substantially the same as in the preferred embodiment with the exception that the limit switch 34 and the thermostat 38 may be employed to operate a gas valve instead of a switch.

It will be apparent from the foregoing that herein is provided an exceptionally sturdy and efficient device which may be universally used. Furthermore the structures shown herein may be modified without departing from the principles of providing a heater wherein the flow of heated air is dependent entirely upon pressure built up through the action of a fan opposed to a heating element.

It will also be apparent to those skilled in the art to which the device appertains that numerous details of construction and design may be altered and changed without departing from the spirit or scope of the invention. Accordingly the patent granted hereon is not to be limited to the preferred embodiment here shown or in any other manner except as is necessitated by the terminology of the appended claims when given the range of equivalents to which they maybe entitled.

I' claim:

1. In a heater, a cylindrical member having an open end and a closed end, a heating element positioned in said closed end, a fan positioned in said open end and adapted to force air through said cylindrical member toward said heating element, an annular member secured to the walls of said cylindrical member intermediate the ends thereof, the inner edges of said annular member being ing therebelow and providing a combustion chamber beneath said first cylindrical member.

2. In a heater, a body having an open end and a closed end, an apertured partition positioned intermediate the ends of said body to provide a mixing chamber, means for directing a fiow of air through said apertured partition into said mixing chamber, means for heating the air entering said tion of said mixing chamber and thence upwardly adjacent the outer walls of said body, means for discharging the upwardly flowing air from said body at a point near the upper part of said mixing chamber, and means for heating said air as it is circulated within said mixing chamber, said means for heating being disposed on the exterior of said body,

l. In a heater, a body having an open end and a closed end, a heating element in which said closed end is nested and providing means for heating said closed end, a fan in said open end disposed to force air into said body and toward said heated end, means dividing the interior of said body into upper and lower chambers, said means comprising a, member in the form of an inverted truncated cone and being positioned to direct air from said fan and upper chamber into the central portion of said lower chamber, and means for exhausting air from said lower chamber at a point above its entry into said lower chamber.

5. In a heater, a hollow body having an open end and a closed end, a member into which said body is positioned providing means for heating said closed end, means for forcing air through said open end and toward said closed end, a substantially funnel shaped member positioned intermediate said ends and adapted to direct incoming air toward the center or said closed end,

and port means above the discharge end of. said staggered relation, closure members positioned on the ends of said alternately staggered fins, an

insulating member encasing said fins and the.

lower end of said body, said insulating member and said fins combining to form a fiue encasing the lower portion or said body, an electrician,

positioned adjacent the upper end of said body, an apertured partition positioned in saidbody intermediate the ends thereof, and an outlet port formed'in said body at a point beneath said partition.

"I. In a heater, a hollow body having anopen upper end and a lower closed end, a discharge port intermediate said ends, an aperturedpartition securedwithin said body at a point above; said discharge port, a second hollow body telescopedover the lower portion of said first named body, the walls of said bodies being spaced apart,

a plurality of fins disposed between said bodies, said fins being alternately staggered to provide a single passage encasing the lower portion of said first named hollow body, an inlet formed in said second body beneath certain of said fins, an upwardly projecting outlet on the opposite side of said body, and means for forcing a current of air downwardly through said partition.

8. In a heater, a hollow body having a closed lower end and an open upper end, a partition substantially in the form of a truncated cone dividing said body into upper and lower compartments, means for heating said lower compartment, said means comprising a combustion chamber beneath the closed end of said hollow body, a continuous line extending from said chamber around the peripheral surface of the lower portion of said body, means for driving a current of air downwardly through said truncated cone partition, and means for expelling said air from said lower compartment.

9. In a heater, a hollow body, a closure covering one end of said body, a substantially dish-shaped apertured partition intermediate the ends of said body, means for conveying a heated fluid over the outer lower surface of said body, means for directing a current of air toward the closed end of said body, and a discharge port in said body below said dish-shaped partition.

10. In a heater, a body, a closure over one end of said body, the other end of said body being open to atmosphere, an apertured partition intermediate the ends of said body, a second body within which said first named body is nested, said second body having a closure adjacent the lower end thereof, thev vertical walls of said bodies being spaced apart, a plurality of bafiies in spaced relation engaging said walls and providing a single continuous passage, a heat impervious material covering the walls of said second body, and a discharge port for said first named body positioned between the upper end of said second body and said apertured partition.

LEO N. WALTER.