US2178823A - Heating means - Google Patents

Description

NOV, 7, 193% v g WIEGANEQ 2,178,823

HEAT ING MEANS Filed Oct. 5, 1937 72M, WWW 2mm ATTORNSJIS Edwin, L WiQd.

Patented Nov. 7, 1939 eerie l. filalmi My invention relates to heating means, more particularly to that type employing sheathed elec-= trical heating elements, and an object of my invention is to provide improved supporting means for such heating elements, and improved heat reflecting and air circulation means for use in connection therewith.

In the drawing accompanying this specification, and forming part of this application, I have shown. for purposes of illustration, one iorrn which my invention may assume, and in this drawing:

Figure l is a top plan view of an embodiment of the invention, parts of the same being broken away'to expose the underlying construction,

Figure 2 is a vertical sectional view, corresponding substantially to the line 2-2 oi Figure 1, while Figure 3 is a bottom plan view of said ernhcdl= ment, a portion thereof being brolren away to better accommodate the view to the sheet.

The embodiment of the invention, as disclosed in the drawing, comprises heating elements id and i i, which may be in the form of annular, concentrically disposed heating units, each having re= sistance member 92, enclosed within a metallic sheath, and suitably insulated therefrom, the particular construction of the heating elements per se, being well known. Each oi the heating elements it and ii is provided with terminals 68, to which are attached conductor bars i the outer ends of which extend into, and support, an insulating block 65, provided with apertures it, through which energizing conductors (not shown) may be inserted into contact with terminals ll of the conductor bars ill, this construction also being well known in the art.

' The heating elements it and i l are mounted concentrically upon a metallic support, preferably in the form of a substantially triangular, or heart-shaped cast spider it, having curved ribs it, diverging from an apex Ell, toward, and connected to, outwardly inclined base sections '2 l-i i the latter having their ends 22-4-22 spaced apart, and connected by an inwardly curved connecting rib 23, the latter defining a space 2 3 through which the conductor bars l l extend. Atthe apex 20, and base corners 25-4'5, the spider i8 is provided with outwardly extending projections it, each of which extends through a suitably positioned aperture 2?, in the skirt 28, forming part of a somewhat resilient adapter or supporting ring 29, which also is provided with an angular web 38), carrying an angular flange 8i, adapted to rest upon the defining edge 32 of a stove aper i932, crlal l lo, ld'hill (@l, Elli -=37) ture. The sunporting ring is somewhat resili cut, and because of the peculiarly spaced three point connection thereof with the spider it, application of some iorce between the points of connection, will enable the ring to be conveniently sprung onto, or out of engagement with, the projectlons The spider is also provided with a central arcuate rib section 33, the intermediate portion of which, is connected by a pair of radially aligned cup members 36, the apex portion 26B of thespider ill, the cup members 35 being offset to one side of the plane in which the ribs ill lie, to provide a support upon which the heating elements to and ii may rest, the end portions 3?;

oi the rib 33 "being connected to the base corners by similar our members 3? and split rivets losing carried the heating elements it and ill, extended suitable apertures in the cup inernhers and and having their split ends upset and lying within the cup members, thus securing the heating elements it and ii to the spider @onnecting ribs ll also conhost the central rib section with the ribs as, and

the ribs M, as well as the ribs i9, and the ends a or the connecting rib 23, have lugs d2 thereon, projecting to the level of the heating element supporting surfaces of the cup members 35, ill, and

The arcuate section 353 is also provided with inwardly extending, radially disposed arms Q3, which support a small offset perforated platform id, and at its opposite side the section 33, adjacent the ends thereof, is provided with a pair of spaced projections 15, adapted to extend through suitably spaced anertures it of a reflector ii, to insure proper positioning of the reflector. The re- :flector lll is of dish-like form, inverted when in place, as best shown in Figure 2, out out, as at 38, to clear the conductor bars id, and having a central aperture it), surrounded by a boss til, the peripheral margin of the reflector ll preferably having a downturned flange 58 extending there--' along. With. the reflector ll disposed with its convex contour toward the under surface of the spider it the marginal portions thereof fall away from the spider and leave a considerable space cc-tween the margins and the under surface of the spider 3 ll, the central portion of the reflector resting against the arcuate section 33. The rehector l? is held in centrally connected position by a wing not 52 threaded upon a screw shank 53, extending through the aperture in the platform M, and the screw shank 53 is carried by a cup-shaped disk 5d having a central protuberance, the disk 54 preferably occupying almost the entire space within the heating element H.

The relation of the heating elements I 0, ll,

*spider iii, the reflector 41, and the disk 54, as

described, results in very considerable air circulation beneath and about the heating elements I ll and I i, preventing overheating, especially when running idle, and permits substantial closingof the aperture of the heating element I] by the disk 54, with increased heating efficiency. Also it will be apparent that the relation of the threecornered spider l8, and of the supporting ring 29,

is such that-the ring 29 may conveniently be sprung onto and oil? 0! the spider l8, by slightly compressing the ring between the points of support. a

It will be apparent to those skilled in the art that I have accomplished at least the principal object of my invention, and it also will 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 invention is capable 01 uses and has advantages not herein specifically "ing downwardly to radially outer free marginal portions of said baiile member, said free marginal portions being below and spaced from the lower margin of said separate ring member so that air may enter in a generally radially inward direction between said free marginal portions and the lower margin of said separate ring member and proceed in a generally upward direction through said assembly into space above said assembly.

EDWIN L. WIEGAND.

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