|Publication number||US2973423 A|
|Publication date||Feb 28, 1961|
|Filing date||May 7, 1959|
|Priority date||May 7, 1959|
|Publication number||US 2973423 A, US 2973423A, US-A-2973423, US2973423 A, US2973423A|
|Inventors||Edward Ammerman George, Errol Walling David|
|Original Assignee||Wiegand Co Edwin L|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (3), Referenced by (4), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Feb. 28, 1961 a. E. AMMERMAN ETAL 2,973,423
MAGNETICALLY SUPPORTED HEATER ASSEMBLY Filed May 7, 1959 INVENT OR.
DA V/D E. HALL ING- BY &. EDWARD AMMlRMA/l A f/oknry United States Patent MAGNETICALLY SUPPORTED HEATER ASSEMBLY Oakmont, and David Errol George Edward Ammerman,
to Edwin L. Wie- Walling, Pittsburgh, Pa., assignors gand Company Filed May 7, 1959, Ser. No. 811,640
3 Claims. (Cl. 21937) The present invention relates to electric heater assemblies, more particularly to electric heater assemblies of the type for use in the oven of a domestic range and the like, and the principal object of the invention is to provide new and improved assemblies of the character described.
Most domestic electric ranges are provided with an electric heating element, known as a broiler element,
which cooksfood positioned beneath it by means of radiation. For practical consideration, this element is usually positioned within and adjacent to the top wall of the range oven; however, it is to be understood that such an element may be otherwise located.
In the past, most broiler elements were of the plug-in type wherein an interior oven wall, usually the rear Wall,
was. formed with an aperture in which a dielectric socket member was mounted and to which the electrical power .leads were connected. The element was provided with from the prongs above-mentioned, each make of range and frequently different models of the same make require their own peculiar element construction.
Because of the great number of makes and models of electric ranges in present use, it is a practical impossibility to stock the diversity of broiler elements required by such ranges. Accordingly, a great need exists for a replacement broiler element which may readily be installed in practically any range regardless of its age, model, or manufacture.
While the co-pending application of G. Edward Ammerman, filed June 20, 1957, Serial Number 666,881, entitled Electric Heaters and assigned to the same assignee as the present case, solves many problems attendant with providing a universal replacement broiler element, the construction is less than completely satisfactory in so far as ease and rapidity of installation is concerned.
The present invention provides a broiler element having all the advantages of the one disclosed in the abovementioned co-pending application and further has the advantage of being more quickly and easily installed in the various makes and models of electric ranges. Other advantages will readily become apparent from a study of the following description and from the drawing appended hereto.
In the drawing accompanying this specification and forming a part of this application there is shown, for purpose of illustration, an embodiment which the invention may assume, and in this drawing:
Figure 1 is a fragmentary perspective view of the interior of an oven in which is installed a broiler element constructed in accordance with the present invention, and
Figure 2 is an enlarged, broken, fragmentary perspective view generally corresponding to the line 22 of Figure 1.
Referring to Figure 1, the heating element 10 of the present invention is shown mounted within an oven enclosure having atop wall 11, a bottom wall 12, side walls 13 and a rear wall 14. Although not shown, a suitable door, normally closes the front of the oven. While the element is herein shown mounted on wall 14 adjacent top wall 11, such disposition of the element is illustrative only and is not to be considered as a limitation.
The heating element herein disclosed is preferably of the well-known type wherein a conductor of relatively high electrical resistance and having end portions of relatively low electrical resistance is disposed in an elongated, tubular metallic sheath whereby the low resistance portions extend from respective sheath ends and whereby the conductor portions are insulated from the interior wall of the sheath by suitable electric-insulating, heat-conductive material. The element thus constituted provides an intermediate heat generating portion 15 (that portion adjacent the high resistance conductor portion), terminal end portions 16 (those portions adjacent respective low resistance element portions), and terminal connector portions 17 (those low resistance conductor portions which project from respective sheath ends) to which the electrical connections may be made.
As illustrated in Figure 1, the intermediate heat generating portion 15 of element 10 is formed to provide a suitable heating pattern presently including a pair of legs 115, 215 extending from front to rear of the oven. The terminal end portions 16 of the element are disposed in side by side spaced-apart relation and are connected together by means of a transversely extending sheet metal plate 18 which provides a flange for a purpose to appear. Plate 18 may be welded, crimped or otherwise fixedly secured to respective terminalend portions 16. As best seen in Figure 2, the element terminal portions 16 extend through and project beyond the plate 18 to dispose the terminal connector portions 17 of the element on one side of the plate and to dispose the heat generating portion 15 of the element on the other side of the plate.
With reference to Figure 2, the element is adapted to be secured to wall 14 of the range with plate 18 overlying and covering the aperture 19 from which the previously mentioned dielectric socket member was removed and discarded. It will be noted that the element terminal ends 16 extend through the aperture 19 to dispose the heat generating element portion 15 on one side of wall 14 and within the oven enclosure and to dispose the element terminal connector portions 17 on the other side of the wall and outside the oven enclosure.
The means provided for securing the portion of the element having the terminal ends 16 to the wall 14 need not be described in detail since such construction is disclosed in the above-mentioned, co-pending application. Briefly, however, such means comprises amember 20 which is pivoted to the plate 18 and which operates to clamp the plate against the wall 14 upon manipulation of a clamping screw 21.
The present invention is directed to the construction for supporting within the oven enclosure that portion of the heating element which is spaced from the terminal ends 16; accordingly, the following arrangement of parts is presently employed for this purpose.
Extending between and secured to the legs 115, 215 of the heating element are metal strips, or braces 22, 23, which function to add rigidity to the various legs of the heat generating element portion. If desired, each strip may have a longitudinally extending flange 24 along one or both edges (see Figure 2) to add rigidity thereto. Se-
cured to one of vtheside faces of brace 23 is an angular bracket 25. A screw and nut assembly 26 may conveniently'be employed to removably secure the bracket to the brace, the screw passing through aligned apertures in the latter and the vertical leg of the bracket. If desired, this bracket leg may have a flange which overlies the brace and insures that the bracket will beheld against rotation about the axis of the screw and nut assembly 26.
Secured to the bracket 25 by any suitable means is a suitable permanent magnet 28 which magnetically attracts the magnetically permeable top wall 11 and thus supports the element therebeneath. At the present time, in order to provide for vertical adjustment of the magnet toward and away from the top wall 11, an elongated screw 29 is anchored to the magnet and depends therefrom for threaded engagement with the horizontal leg of the bracket 25. A nut 30 locks screw 28 to the bracket to retain the magnet in its adjusted position.
Installation of the broiler element herein disclosed is simplicity itself. The power leads behind Wall 14 will be pulled into the interior of the oven through aperture 19 and connected to the element terminal connector portions 17. The latter will then be projected through aperture 19 and the adjoining end of the heating element secured in position to Wall 14 with plate 18 overlying the aperture and with magnet 28 abutting top Wall 11. Magnet 28 will then be adjusted vertically, if necessary, to insure that the heat generating portion 15 of the broiler element at the front of the oven is spaced beneath top wall 11 substantially the same amount as is such element portion at the rear of the oven.
It is to be understood that while in practically all constructions the top wall 11 of the oven is magnetically permeable so that the magnet will be attracted thereto, in the event an element of the present type is to be installed in an oven or the like whose top wall is not magnetically permeable, a small magnetically permeable plate or the like could be secured to such top wall in position for engagement with the magnet.
In view of the foregoing it will be apparent to those skilled in the art that we have accomplished at least the principal object of our invention and it will also be apparent to those skilled in the art that the embodiment herein described may be variously changed and modified, without departing from the spirit of the invention, and that the 4i invention is capable of uses and has advantages not herein specifically described, hence it will be appreciated that the'herein'disclosed embodiment is illustrative only, and that our invention is not limited thereto.
1. An electric heater assembly for use with ovens and the like having generally horizontal walls and an adjoining, apertured, generally vertical wall whose aperture may be spaced varying distances from respective adjoining horizontal walls, comprising an electric resistance heating element having a heat-generating portion adjacent to and underlying said horizontal wall and a terminal portion extending through the vertical wall aperture for conducting electrical energy to said heat-generating element portion, means supporting said element terminal portion in position within said vertical wall aperture for in turn supporting an adjoining heat-generating element portion in position adjacent said horizontal wall, a permanent magnet carried by a heat-generating portion of said element spaced from said element terminal portion and adapted to grip said horizontal wall by magnetic attraction to support such spaced, heat-generating element portion in position therebeneath, and means for adjusting the vertical relationship between said magnet and said element to vary the supported position of said spaced, heat-generating element portion in accordance with the supported position of said element terminal portion and its adjoining, heat-generating element portion.
2. The construction of claim 1 wherein said element is of the tubular sheathed type whose heat-generating portion provides a pair of spaced-apart legs and wherein said magnet is disposed intermediate and substantially equidistant said element legs.
3. The construction of claim 2 wherein a brace member extends between said element legs and wherein said magnet is adjustably secured to an intermediate portion of said brace member.
References Cited in the file of this patent UNITED STATES PATENTS 2,137,149 Tuttle Nov. 15, 1938 2,442,900 McCormick June 8, 1948 2,702,335 Cordis Feb. 15, 1955
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2137149 *||Jan 16, 1937||Nov 15, 1938||Edison General Elec Appliance||Electric heating unit|
|US2442900 *||Nov 3, 1939||Jun 8, 1948||Gen Motors Corp||Electric oven heating system|
|US2702335 *||Mar 3, 1953||Feb 15, 1955||Nat Cordis||Magnetically supported crankcase heater|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3162754 *||Aug 10, 1962||Dec 22, 1964||Ferro Corp||Plug-in oven units|
|US6285009||Aug 25, 1999||Sep 4, 2001||Maytag Corporation||Electric heating element for a cooking appliance|
|US9057525 *||May 16, 2012||Jun 16, 2015||Bsh Home Appliances Corporation||Home appliance with unitary bake element retainer|
|US20130306051 *||May 16, 2012||Nov 21, 2013||Bsh Home Appliances Corporation||Home appliance with unitary bake element retainer|
|U.S. Classification||219/404, 219/408, 219/523|
|International Classification||F24C7/00, F24C7/06|