US1596141A - Electric heater - Google Patents

Description

latentecl Aug. 17, 1926.

UNITED STATES THEODORE G. BAUGH, OF LAKE PLACID,1\TEW YORK.

ELECTRIC HEATER.

Application filed May 5, 1925. Serial No. 28,139.

This invention relates to improvements in electric heaters, having for an object to provide a novel form of heater wherein forced draft by the heating means of the same will be effected, hence, permitting of radiation of greater heat and generally, increasing the efliciency of the device.

It is likewise an object of the invention to provide a heater wherein a novel form of cover or hood is employed, the same being of such construction as will constriet the outlet way for the heated air, thereby causing the same to act as a fluid piston and assist in the establishing of a forced draft through the device and by the heating means.

It is also an equally important object of the invention to provide a heater with means for dissipating the currents and the heat occurring at the bottom of the same and adjacent the point of communication of the heating chamber with the cold air inlet ways in order that the downward passage of such air and its discharge into the heating chamber will not be impeded by contact with a surface of high temperature, hence ensuring the full circulation of air through the device, first, its downward passage when cold, through the ways therefor into the heating chamber, and with heating, immediately followed by upward passage of the same through the heating chamber and from the device.

Among other aims and objects of the invention may be recited the provision of a heating device of the character mentioned whose walls of the housing thereof and walls of the jacket of the same are formed to provide heat insulation means whereby such walls will be kept cool and in consequence, provide for a cool passage wayor inlet way for the cool air flowing into the heating chamber of the device, ensuring the downward assage of such air into the housing of the device to a point in proximity to the bottom of the same, whereupon. it is then dischar edinto the jacket the interior of whisl constitutes the heating chamber.

Other objects of the invention will be in part obvious, and in part pointed out herelnafter.

In order that the invention and its mode of operation may be readil understood by persons skilled in the art, have in the accompanying illustrative drawings, and in the detailed following description based thereupon, set out one embodiment of the same.

In these drawings Figure 1 is a vertical section through the improved device;

Figure 2 is a fragmentary top plan view of the same with the hood or cover applied; and,

Figure 3 is a similar view wherein the hood or cover has been removed, showing in detail, the arrangement of the heating element with respect to the open upper end of the heating chamber or jacket of the device.

Having more particular reference to the drawings, in connection with which like characters of reference willdesignate corresponding parts throughout, the improved heater may be stated to comprise a shelllike casing designated in its entirety herein by the numeral 1, the lower or bottom portion ofsuch shell being provided with outwardly bent relatively spaced legs 2, while a bottom 3 is fixedly arranged in the lower end thereof, as is clearly shown in the Figure 1. A plurality of layers of heat insulating material designated herein, respectively, by the numerals 4, 5 and 6 are snugly received Within the shell-like body 1 of the device upon the bottom 3 thereof, while over the upper face or side of the layer of heat insulatingmaterial 6, there is arranged a covering or projecting sheathing 7. Also, a sleeve of insulating material, indicated in its entirety by the numeral 8 is snugly received within the body or housing 1, being arranged adjacent to and extending parallel with the vertical side walls thereof. In this connection, it is of course to be understood that the heat insulating layers and sleeve employed may be of various forms or consruction, although it is desirable that the same provide for the usual dead air space as between the opposite walls of the same, suitable heat insulating material such as asbestos, or similar sheet material, being arranged therein. This insulating sleeve 8, as will be noted, rests upon the covering or sheathing 7 over the upper face of the uppermost layer of heat insulating material 6 and the upper marginal portions of said sleeve extend to a point substantially flush with the upper marginal portions of the vertical sides of the housing 1, as is also clearly shown in the Figure 1. Further more, if desired, an inner facing or sheathing of metal or other suitable material, desthe outlet way from the jacket 10 comprising the heating chamber of the improved device and because of this constricted out- .let passage for the heated air passing from the heating chamber or jacket 10, it will be understood that such air will act as a form of fluid piston within the lower portion of the heating chamber and therefore, will serve to draw the cold air downwardly through the cold air ways afforded by the spacing of the jacket 10 from the sides of the vertical walls of the housing 1, hence setting up the so-called forced draft through the heating device and thereby generally lending to its efliciency.

The modus operandi of the invention may be reviewed as follows:

Electrical energy is, of course, conducted to the electrical resistance heating element 13. With the bringing of the heater 13 to proper temperature, it will be understood that air within the heating chamber or jacket 10 will be heated and by consequence, will be caused to ascend in the device, passing through the constricted way provided for by the frusto-conical sleeve 23. Such heated air will pass from the sleeve 23 into the atmosphere surroundin the device. Because of the arrangement 0 the cold air inlet ways in the heating device, together with the fact that the side walls ofthese ways are kept cool at all times by reason of the insulatingmaterial employed in their construction, it will be understood that cold air will pass in that direction as indicated by arrows in the Figure 1 downwardly through such cold air ways into the housing 1 of the device to a point adjacent the bottom thereof, whereupon it will be gradually heated, and hence, will ascend in that direction as further indicated by arrows, passing into and upwardly through the eating chamber or jacket 10' into final contact with the electrical resistance heating element 13 whereat it will be brou ht to the desired temperature and then disc arged by way of the constricted outlet port provided by the frusto-conical sleeve 23 into the atmosphere. With discharge of the heated air from the constricted outlet way of the heating device, through the medium of the sleeve 23, it will of course cause such outgoing heated air to act as a form of fluid piston within the heating chamber, draw ing or urging the air withinthe lower portion of such heating chamber in its path of ascension into engagement with the electri cal resistance heating element 13. Thus, it will be appreciated that a forced draft will be provided as through the ways of the heating device and by consequence, the heating efiiciency of the same will be generally increased. Also, because of the provision of the dissipating device 18, it will be understood that the heated air within the upa.... assumes.

per or intermediate portion ofthe heating chamber or jacket 10 will be prevented from heating the bottom of the device to too high a temperature whereat it would impede the passage and discharge of cold air through the cold air ways into such heating chamber.

in addition to being utilized as a heating device, it will be understood that the invention will serve as an effectual form of electrical cooking stove, this being attained merely by removing the drum-like cover or hood 21 from the top of the housing 1 and the jacket 10, thereby permitting a cooking utensil or other device to be brought into proximity to the electrical resistance heating element 13 and to the proper heating temperature.

Manifestly, the construction shown is capable of considerable modification, and such modification as is Within the scope of my claims, I consider within the spirit of my invention.

I claim 1. A heating device comprising a housing having heat insulation means arranged in the side and bottom portions thereof, a jacket supported within said housing in spaced relation to the inner sides and bottom of the same, heat insulating means for said jacket, and heating means supported adjacent the open upper end of said jacket.

2. A heating device comprising a housing, heat insulating means adjacent the inner sides and bottom portion of the housing, a jacket fixedly supported within said housing in spaced relation to the inner sides and bottom of the same, heat insulating means for said jacket, and an electrical resistance heating element spanning the open upper end of said jacket and fixedly supported with respect thereto.

3. A heating device comprising a housing, a jacket supported within said housin in spaced relation to the inner sides and ottom of the same, heating means supported adjacent the top of said jacket, and heat dissipating means fixedly arranged upon the bottom of said housing and positioned within and adjacent to the lower portion of said jacket.

1. A heating device comprising a housing, heat insulating means covering the inner sides of the vertical walls and bottom of said housing, a jacket supported within said housing in spaced relation to the inner sides and bottom of the same, heat insulating means for said jacket, heating means supported adjacent the top of said jacket, and heat dissipating means fixedly secured to the bottom of said housing and extending upwardly into the lower portion of said jacket.

A heating device comprising a housing, heat insulating means covering the inner sides of the Vertical Walls and bottom of said housing, a aeliet suggorted Withinsaid housing in spaced relation to the inner sides and bottom of. the same, heat insulating means for said jaeket, an electrical resistance heating element spanning the open upper end of said jacket and fixedly secured with respect to the same, a heve d sleeve carried adjacent the open upper end of said jacket and etitendinfij upwardly therefrom, an inverted substantially frueto-conieal heat dissipating means rigidli supported upon the hottomoi said housing andextending upwardly into the aeltet, adrum-like cover remo vahly en gageuble over the upper end of the Vertical Walls of said housing, a grid engaged over the upper open end of said cover, and, a frnstoeonicnl ring fixedly car ried Within said cover and adapted to he smw'ly engagedeversaid bevelled ring, as and for the purposeset forth.

In Witness whereof I have hereunto set my hand.

THEODORE BAUGH.

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