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Publication numberUS3303324 A
Publication typeGrant
Publication dateFeb 7, 1967
Filing dateAug 21, 1964
Priority dateAug 21, 1964
Publication numberUS 3303324 A, US 3303324A, US-A-3303324, US3303324 A, US3303324A
InventorsLeon Appleman
Original AssigneeLeon Appleman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Heating unit
US 3303324 A
Abstract  available in
Images(1)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

L. APPLEMAN Feb. 7, 1967 HEAT ING UNIT Filed Aug. 21, 1964 1.: Ill! 41] I I LFIL Lrlu L-IIL Lrl-l I.

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i764 F/GJ United States Patent 3,303,324 HEATING UNIT Leon Appleman, 225 E. 57th St., New York, NY. 10021 Filed Aug. 21, 1964, Ser. No. 391,231 8 Claims. (Cl. 219-345) This invention relates to a heating unit and relates more particularly to a heater having a quartz plate element as a source of radiation.

A primary object of this invention is the provision of an improved heating unit which is sturdy and durable in construction, reliable and eflicient in operation and relatively simple and inexpensive to manufacture, assemble, utilize, and maintain.

Another object of this invention is the provision of a heating unit wherein a quartz plate element has a coiled resistance wire pressed against its rear surface by a backing member in relatively tight abutting relationship to thereby increase the effective quantity of radiant heat produced by the unit.

A further object of the instant invention is to provide a heating unit of the type described wherein the backing plate has a continuous groove means defined therein in facing relationship to the quartz plate and the coiled resistance wire is disposed in the groove means in compressed relationship.

A still further object of the instant invention is the provision of such a heating unit wherein the groove means defined in the backing member has a lesser depth than the diameter of the coils of the resistance Wire so that when the quartz plate and the backing member are pressed together the coil is compressed to tightly fit within the groove means.

Still another object of this invention is to provide a heating unit wherein the backing member 'has a highly reflective element such as an aluminum foil sheet or the like in abutting relationship with its rear surface to further increase the thermal output of the unit.

Yet another object of this invention is to provide a heating unit of the type described wherein all of the elements are maintained in relatively tight abutting relationship by a frame means.

Other and further objects reside in the combination of elements, arrangement of parts and features of construction.

Still other objects will in part be obvious and in part be pointed out as the description of the invention proceeds and as shown in the accompanying drawing wherein:

FIGURE 1 is a bottom plan view of a heating unit in accordance with the instant invention, with parts broken away for illustrative clarity, and with certain hidden parts being shown in dotted lines;

FIGURE 2 is a longitudinal cross-sectional view taken substantially on line 22 of FIGURE 1;

FIGURE 3 is an enlarged transverse cross-sectional view taken substantially on line 33 of FIGURE 1;

FIGURE 4 is an enlarged fragmentary view showing the relationship between the quartz plate element, the backing member and the resistance coil before the former two elements are pressed together in abutting relationship; and

FIGURE 5 is an enlarged fragmentary View similar to FIGURE 4 but showing the relationship of the elements after the quartz plate element and the backing member have been pressed together.

Similar reference characters refer to similar parts throughout the several views of the drawing.

Referring now to the drawing in general, the heating unit of the instant invention is designated generally by the reference numeral 10. The unit is comprised basically of a quartz plate element 12, a backing member 3,303,324 Patented Feb. 7, 1967 "ice 14, a coiled resistance wire 16, a highly reflective element 18, and a frame means 20.

The quartz plate element 12 is conventional in construction and may be of any desired size or shape depending upon the particular use to which the heating unit 10 is to be put.

The backing member 14 is comprised of a highly heat resistant asbestos compound such as produced by Johns Manville Company and has a continuous groove means 22 defined therein in facing relationship to the quartz plate element 12.

The coiled resistance wire 16 is formed of any conventional material such as the well known nickelchromium alloy Nichrome and each coil has a diameter substantially equal to or slightly less than the width of the groove means 22 and larger than the depth of the groove means 22 as will be best seen in FIGURE 4. Thus, when the quartz plate element 12 and the backing member 14 are pressed toward each other into abutting relationship the coiled resistance wire will be compressed in relatively tight fit within the groove means 22 as shown at 16 in FIGURE 5. It will be noted that a large portion of each coil, when compressed, is in actual contact with the quartz plate element 12.

The highly reflective element 18 may comprise any conventional material such as a sheet of aluminum foil or the like and is placed on the rear surface of the backing member 14 in abutting relationship therewith.

The frame means 20 may take any form depending upon the particular utility of the heating unit 10 and as shown in the drawing comprises an outer frame member 24 open at its bottom 26 and including portions 28 to which are secured by screw means or the like 30 flange members 32 affixed to an inner frame member 34 having an inwardly directed peripheral flange 36 to support the quartz plate element 12. Angle members 38 are secured in any conventional manner such as by spot welding or the like interiorly of the inner frame member 34 in such a manner as to maintain the quartz plate element 12, the backing member 14 and the highly reflective element 18 in relatively tight abutting relationship.

The ends 40 of the resistance wire 16 are conductively connected to a source of electrical power (not shown) in any conventional manner such as by providing a plug member receivable in an ordinary outlet box for A.C. current.

It is to be understood that the heating unit 10 of the instant invention may be used in many different environments. For example, it may be incorporated into a home cooking unit such as a broiler or the like for cooking food or into an industrial heater for baking or drying of coatings or finishes applied to various articles. The par. ticular arrangement of parts set forth hereinbefore wherein the coiled resistance wire is compressed within the groove means of thebacking member and in substantial cont-act with the rear surface of the quartz plate element produces an unexpected increase in output requiring less time and electrical power to heat selected articles than heating units known heretofore.

It will now be seen that there is herein provided an improved heating unit which satisfies all the objectives of the instant invention and others, including many advantages of great practical utility and commercial importance.

Since many embodiments may be made of the instant inventive concept and since many modification may be made of the embodiments hereinbef-ore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative, and not in a limiting sense.

I claim:

1. A heater unit comprising a quartz plate element, a backing member having two surfaces, one of said surfaces being in abutting relationship with said quartz plate element, continuous groove means defined in said one surface of said backing member in facing relationship to said quartz plate element, a coiled resistance wire having two ends disposed in said groove means closely pressed against said quartz plate element, the depth of said groove means being less than the diameter of the :coils of said resistance wire and of a configuration providing space for limited transverse expansion of said coil whereby said coils are compressed by said quartz plate element, and a source of electrical power conductively connected to said ends of said resistance wire.

2. A heater unit in accordance with claim 1 wherein the Width of said groove means is substantially equal to said diameter of said coils of said resistance wire.

3. A heater unit in accordance with claim 1 wherein said backing member is comprised of a highly heat resistant asbestos compound.

4. A heater unit in accordance with claim 1 wherein said resistance wire is comprised of a nickel-chromium alloy.

5. A heater unit in accordance with claim 1 further comprising a highly reflective element in abutting relationship with the other of said surfaces of said backing member. 7

6. A heater unit in accordance with claim 5 wherein said highly reflective element comprises an aluminum foil sheet.

7. A heater unit in accordance with claim 1 further comprising a frame means maintaining said quartz plate element and said backing member in relatively tight abutting relationship.

8. A heater unit in accordance with claim 5 further comprising a frame means maintaining said quartz plate element, said backing member and said highly reflective element in relatively tight abutting relationship.

References Cited by the Examiner UNITED STATES PATENTS 2,481,554 9/1949 Winstead 338252 X 3,059,087 10/1962 Perlman 219405 X 3,155,814 11/1964 Appleman et al. 219345 X FOREIGN PATENTS 266,199 2/ 1927 Great Britain.

RICHARD M. WOOD, Primary Examiner.

C. L. ALBRITTON, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2481554 *Dec 17, 1946Sep 13, 1949Thomas W WinsteadThermoplastic film heat sealing element
US3059087 *Apr 28, 1960Oct 16, 1962Temperature Engineering CorpInfrared oven
US3155814 *Jul 31, 1961Nov 3, 1964Radiant Electronic Products CoInfrared radiant heating oven
GB266199A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3478192 *Apr 25, 1968Nov 11, 1969Ostrander Seymour CoElectrically heated platen
US3564207 *Jul 24, 1969Feb 16, 1971Infra Red Systems IncElectric infrared heater
US3629555 *Jul 6, 1970Dec 21, 1971Herbert Products InternationalHeating apparatus for a printing press
US3680207 *Jan 28, 1971Aug 1, 1972Corning Glass WorksMethod of making electrical heating units
US3711682 *Jun 17, 1971Jan 16, 1973Phillips Petroleum CoConduit heating apparatus
US3864546 *Apr 16, 1973Feb 4, 1975Casso SolarSystem for irradiating a discontinuously moving web
US4247979 *Mar 8, 1979Feb 3, 1981Eck Richard HRadiant heater and method of making same
US4292500 *Sep 7, 1978Sep 29, 1981Rhone-Poulenc IndustriesModular, constructional heating unit
US4380116 *Dec 4, 1980Apr 19, 1983E.G.O. Elektro-Gerate Blanc U. FischerRadiant electrical heater, as well as method and apparatus for the manufacture thereof
US4450343 *Oct 19, 1981May 22, 1984Dundon Gerard MHigh output, long duration, quick response, radiant electrical heater
US4531047 *Jul 28, 1982Jul 23, 1985Casso-Solar CorporationClip-mounted quartz tube electric heater
US5391858 *May 10, 1993Feb 21, 1995Tourangeau Sprots IncorporatedIce dam melting system
US5461213 *Jun 1, 1992Oct 24, 1995Rodin; HakanHeated floor
US5930457 *Aug 25, 1997Jul 27, 1999Roof Ice Melt Systems, Inc.Heat cell for a roof
US6194686 *Mar 22, 2000Feb 27, 2001Russell R. GohlPortable ground thawing panel system
US6629396 *May 22, 2001Oct 7, 2003Gevorg AvetisyanCell adaptable for construction of a housing structure
DE3711035A1 *Apr 2, 1987Oct 27, 1988Johann RuppFlaechenheizkoerper
DE3917869A1 *Jun 1, 1989Dec 6, 1990Guenter KupfererElectric surface heater - has carrier with central trough for placing heating element which can be filled with electrically insulating heat conducting material
EP0285171A2 *Mar 31, 1988Oct 5, 1988Johann RuppSurface radiator
EP2198759A1 *Dec 17, 2009Jun 23, 2010Nuova Inoxtecnica S.R.L.Heating plate particularly for cooking plates, frying pans, pasta cookers, fryers and devices for professional cooking in general
Classifications
U.S. Classification392/433, 338/285, 338/252, 219/542, 392/436, 338/311, 219/213
International ClassificationA47J37/06, H05B3/26, H05B3/22
Cooperative ClassificationA47J37/0676, H05B3/26
European ClassificationA47J37/06D2, H05B3/26