US1554812A - Electric heat radiator - Google Patents

Description

ELECTRIC HEAT RADIATOR Filed June 10,, 3922 2 Sheets-Sheet l m 216 $2 $02" Fm'iz Girazd A Hornqy 22 1925., mm m F. GERARD ELECTRIC HEAT RADIATOR Filed Junw 10, 1922 2 Sheecs-Shee2 2 [n 276 72 Z02 fm'i'z fla'rard Patented Sept. I 22,

UNITED, STATES] PATENT OFFICE.

FRITZ eIRAnn, on HANAU-ION-THE'MAIN, GERMANY, ASSIGNOR TO THE FIRM, amaz- LAMPEN-GESELLSGHAFT MIT- BE GHRKNKTER HAFTUNG, 0F Iranian-cleans,-

MAIN, GERMANY.

' ELEcTnIc HEAT RADIATOR.

Application filed June 10,

To all whom it may concern: Be it know .that I, FRITZ GIRARD, a citi- Main, Germany, have invented certaih new and-useful Improvements in Electlric Heat fication.

My invention has reference to electric heat radiating and transmittingpdevices, and it is particularly intended to provide/novel Radiators, of which the following is a. specimeans for the easy regulation and control of 3 devices of this kind and in general to so improve and perfect the constru ct-ionand arrangement of the kinds of apparatus of the class referredto that they may be safely applied to the skin or utilized for other purposes, where facility of-i'egulation of the heat, or easy applicability to a delicate obj ect is of importance. I A For the purposeof partial heating of rooms" 1 .electrical heating devices are-in use in which the heating body is arranged in the' focus of a parabolic mirror; and-by this means parallel heat rays are produced similar to the operation of optical. reflectors. Heat radiation of this kind may also be employed for therapeutical purposes. These kinds of apparatus of otherwise simple construction I are 'open' to the dilficultythat thereis no 1 way of limiting 'or of controlling the heat' radiation, as is frequently required for therapeutical purposes, and that the intensity of the radiation of heat could only be regulated heretofore by including a special kind of controlling or regulating means in advance ofat'he radiator, such'as for instancea variable electric resistance.

My lnvention 'is intended toeffect this regulation and control in a novel and efiicient manner, particularly by the provision of means associated With theretiQCtOr or mechanical parts of the heat nadiatmg'dewce.

' The invention is shown as embodied by way of example in aheat radiator-provided with the usual reflector in I Figure 1 in side view with parts in section. Figure 2 is an elevation o-fa portion of the outer end of the reflector ,in one of Various preferred-forms of construction.

Figures}; and 4 illustraterespectively and in' a diagrammatic manner two different forms of reflector as an illustration of one of the important elements of my invention.

Figures 3' and 4 are diagrams illustrating 1922. 'Serial mi. 567,367

The parabolic mirror or reflector a .(Figmelt) is provided with a substantially conical extension 6, the interior of which, in order to assist and increase the heat reflecting action, is provided with special heat reflecting instrumentalities. Among other means I may make use in the example shown 1n the drawlng of a coating of silver, nickel, or of aluminium or the like upon the inner wallsof the conical extension, the said coating being preferably highly polished, so as to adapt the device for the substantially axialradiation ofthe rays of heat. emanatingfrom the source of heat mounted at 70 for instance.

Furthermore, the reflecting interior surface,

if the conical curvature is properly adjusted, causes a deflection of all parallel rays which are not directly made to enter the end opening' of the extension, o as to direct them towards said aperture. Thus the funnel shapedextension, as 'in the case of; rays of light, causes a concentration of the heat rays over the-entire surface-oftheescape opening. The path of the rays emitted by the heating body k will be apparent froieat the drawing, while the action of the h clearly shown in the diagrams of Figures 3, 3' and 4, 4 respectively. to a The-crowdingtogether of the heat rays correspondsto a change of temperature at the funnel opening. )Nith the length of the funnel theescape opening is reduced, and

the more are the rays of heat proportionally concentrated? at the opening? Figures 3 y and 4' represent the temperatures obtained in the different cases. In order to effect a regulation and control of the quantity of heat radiated per unit of irradiated surface authefunnel opening, and in order to increase that ratio, the funnel?) may, beconnected with a. second and third funnel 0 and d respectively, possessing the same degree of conical curvature as clearly shown in Figure 1 of the drawing. f i I Diaphragms are. provided for reducing the area of the opening of the funnel.

form of diaphragm w ich I 'may employ for exam Is in connection with my invention is shown in Figure 2 of the drawing. These diaphragms e are mounted at the end of the funnel, so as to 'be easily detachable.

The free opening of the diaphragm is sur rounded by a heat insulating annulus or ring f of a noii-wnductor of heat, of .cork

or of a cork-composition for instance, which prevents convection of heat towards the protecting disc 9. The said protecting disc may itself he provided with a. similar aunulus h made from a bad conductor of heat, which prevents burning of the skin, when the opening portion of the diaphragm "is brolight in contact with the living body.

' An additional regulation of-heat maybe effected by mounting a regulatable balance resistance coil in the supporting pillar of the reflecting device, such resistance being prothe almost complete utilization of the radiated heat which corresponds to a very great reduction of the amount of watts required as compared with the kinds of'apparatus heretofore employed, and the possibility of producing a great variation of the heat apphed to the living body .in a very simple a manner, by the u'se of funnel extensions of differentlength, as well as by the use of diaphragms and by the possibility of a very convenient manner of regulating the current. i

-While Lhave herein described my invention in its broad aspects, I wish it to understood that-it is obviously not restricted to the particular kinds ofembodiments as shown and 'described,.but changes and alterations in'the structure and combination-of parts may occur to adapt the device to: varying conditions of use, and without deviating from the spiritof the invention as expressed in the claims. I'claim: V

1. Heat radiator comprising in combination, a substantially frusto-conical reflector,

a parabolic reflector covering ;the larger opening of said frusto-conical reflector and a source of heatin the focus of said parabolic reflector.

2. Heat radiator comprising in combination, a plurality of frusto-conical reflectors disengageably assembled, the larger opening of one adjoining the smaller opening of another reflector, a parabolic reflector covering the larger opening of the largest frusto-eonicalreflector and a source of heat in the focus of said parabolic reflector.

3. Heat radiator comprising in combination, a. parabolic reflector, a source of' heat in the focus of said reflector, an open-ended frusto-conical reflectorassociated with said;

parabolic reflector in such manner that the totality of the heat rays emitted by said source, including those reflected by said parabolic reflector, is evenly distributed over the smaller opening of said frusto-conical reflector, and a diaphragm for reducing the cross-sectional area of the bundle of heat rays-removably attached to said smaller opening.

4. Heatradiator comprising in combination, a parabolic reflector, a source of heat in the focus'of said reflector, an open-ended frusto-conical reflector associated with said parabolic reflector in such manner that the totality of the heat rays emitted by said source, including those reflect-ed by said vparabolic reflector, is evenly distributed over the smaller opening of said frustoconical reflector, a diaphragm for reducing the cross-sectional area of the bundle of heat rays removably attached to said smaller opening, and means associated with said dia phragm for preventing contact between it and the body exposed to the action of the heat rays. I

5. Heat reflector comprising in combinationi a parabolic reflector, a source of heat in the focus of said reflector, and open-ended frusto-conical reflector associated with said parabolic reflector in suchmanner that the FRITZ GIRARD.

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