US1829368A - Heat distributor and toaster - Google Patents

Description

Oct. 27, 1931. J. RANZ HEAT DISTRIBUTOR AND TOASTER Filed April 10, 1929 vided with outwardly raised convolutions or Patented Oct. 27, 1931 PATENT OFFICE JACOB RANZ, OF ST. LOUIS, MISSOURI HEAT DISTRIBUTOR AND TOASTER Application filed April 10, 1929. Serial No. 354,151.

This invention relates to new and useful improvements in heat distributors and toast ers.

The primary objects of the invention are 6 to provide a heat distributor and toaster plate comprising two superposed plate members secured together at spaced points and provided with a plurality of projections or raised surfaces so arranged that the surfaces 149 or projections supporting an article to be heated are spaced from the flame and do not come in direct contact with the surfaces or projections which are subjected to the flame. Thus the heat is equalized and more evenly distributed and the plate prevents undue heat being applied to said article at concentrated areas.

Further objects of the invention are to provide two plate members so secured together that they reinforce each other and prevent buckling thereof so that said plates preserve levelsurfaces at all times.

. Other objects of the invention are to provide a pair of plates, each of which is prosurfaces and to secure said plates together at spaced points by spot-welding or riveting so as to prevent buckling or separation of said plates from each other.

Additional objects of the invention are to provide a heat distributor and toaster plate having a pair of imperforate metal plates welded or riveted together at spaced points and havin surfaces projecting outwardly in opposite directions from the normal planes of said plates so as to provide a plurality of oppositely disposed projections or surfaces so as to. support the plate and support the article to be heated on different horizontal planes relatively to each other and with respect to the normal planes of said plates.

VVit-h these and other objects in View, my inventionconsists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying draw-- ings, in which Figure 1 is a top plan view of my improved heat distributor and toaster plate.

Figure 2 is a side elevational view thereof.

Figure 3 is an enlarged cross section taken through the central portion of my plate.

Figure 4 is an enlarged vertical cross section taken through the marginal portion of my plate.

It is known in the art that heretofore both single and double plates have been used in the construction of heat distributors. The single plate has not been found satisfactory as, due to the thin metal wall, the heat was not properly distributed and also the plate had tendency to buckle, thereby distorting the plate and rendering it unfit for use.

In the case of double plates, these have been generally secured together along their edges, the central portion and the intermediate portions of the plates being spaced from each other and left free so that under the action of the heat the central portions of the plates would buckle or bulge outwardly. Furthermore, the plates did not have a sufficient surface contact with each other and consequently considerable heat has been wasted due to the insulating air chamber formed by said plates.

In the present invention I provide a pair of plates securely held together and having considerable surface contact with each other, said plates being so arranged that the article to be heated is suitably spaced from the flame and the surfaces supporting said article do not come in direct contact with said flame.

Referring by numerals to the accompanying drawings, 10 indicates a pair of imperforate metal plates, each of which is provided with a series of concentric convolutions or corrugations 11 which are disposed intermediate a flat central portion 12 and a flat marginal flange or edge portion 13. These corrugations or raised surfaces 11 are presented outwardly whereby the bottoms or low portions 11 of said convolutions are disposed in the normal plane of the plate, that is, in the same horizontal plane with central portion 12 and marginal flange 13. The apices or high portions 11 of said convolutions are raised or spaced above or a suitable distance outwardly from the normal plane.

The two plates are placed against each other with the raised surfaces 11 presented shape.

ti'on's foIined-in-the-plate stretch the material and-protect the strain of expansion and contraction-landreinforce the plate so that it cannot be distorted or bent out of shape under normal conditions. 4

'-points:' g s a 1 a 2: A heat" distributor and toast'er comprisingin combination a pair of imperforate slieet metal plates, each; of which isformed withi a series on concentric con-vol-utions presented'outwardlyafirom 'the plane of said outwardly or in opposite directions so that the central portions 11 and edge portions 13 are in contact with each other. The plates are then secured together in assembled relation, either by spot-welding or riveting, at suitable points. Preferably these points are located centrally' of, portions 11 as indicated at 14 and: at a seriesof points arranged near the edges 13 and disposed in a circleas indicated at 15. The raised portions 11 form air chambers 16 while the low'po-rtions-ll form open air channels 17. Whenvan.article,,such V asa'utensil, or a slice of bread to be. toasted, is being heated it rests on the high portions 11 and is spaced from the low or inner portions ll' by airchannels li; As tliere are no perforationsin either plate, only the-lower plates. comein contact-withuthe- :tram'e and the articlej itself does not come in: direct con tact either with thegasfiame or witlt the lower-plate.- F urthermore, the heat is equalized and distributed throughout the entire area otthe' plates; The upper plate isl'ieated' by: direct" contact with the lower plate. at

points spaced fromthe article and also by means of theairitrapped in chambers 16.- v

'Theweldingor riveting holds the two platestogetherand said p'latesare reinforced" by each otheragainstdistortion by .heat, and 9 severe heat tests prove-that no warping of plates take effect as the; expansion and'contractionofi'theplates is resisted by each other. Preferably, each plate is formed from sheet metal, stamped-and formed to proper Thus the corrugations: or 'convol'u- 1 Aijlreat distributorand toasterjconiprising-" incombination'a pair of sheet metal plates; each of said plates having concentric convolutionsithereby providingone face of e'aeh-plazte'fv'vi'tl'if two-surfaces'disposed at differenfi hori z'ontalplanes, the edge and cen-- tral portions ofeach plitte being in the same horizontal plane with the inner surface of the-apices of inwardly presented convolutions, saa'd plates being; arranged with said -mner surfaces ofsaad eonvolutions and. sald edges and sai dj eentra l portions contacting and welded together ata plurality ofsp aced plate, the central portion and 'the edge; portion ofeaeh plate beingleft straight and ar- 7 "ranged in the same horizontal:pl'anewith'the apices of the inwardly presented convoluportions and the inwardly presented apices of each plate being arranged in contact with the respective parts of the other plate, said plates'being secured together at a plurality of spaced points adjacent to the edges thereof and at the central portions thereof.

toms/of said convolutions contacting with each other and; securedkutogether at spaced points along. saldlines of contact, the' apices of the outwardly presented convolutionsof:

said plates beingarranged. at difierent horizontal planes with respect toeachother-and with. respectto the planes of said plates, whereby. said heat distributor is supported on the apices of the:downwardly presented convolutions and the, utensil is supported on.

the apiceslof. the upwardly presented convo. lutions.

l. in a devicelof the class described, the

combination of a pair of imperforatepressed'v sheet metal: plates' eachof said plateshaving the central: portion and: theedge in the same horizontal plane with each other and the intermediate portion provided with concentricconvolutions,v the inwardly presented apices of which arearrangedin thezsame horizontal plane with said central and'edge portions, said; plates being-arrangedwith theinner faces in juxtaposed? relationsoasto bring said edgesandcentralportions' and theapices of the inwardly presented convolutions in:

contact, said plates-being secured-together at a central-point and at a series of points spaced about. adjacent to-said edges, the outwardly presented. apices of said convolutions being disposed at diflerentxhorizontalplanes. to

form. a plurality of circular air chambers,

whereby said heat distributor is-in supportingcontact with the adjacent surfaces atthe apices of its-outwardly presented convolutions, the central portions and edge portions 01": said plates being. spaced therefrom.

In testimony whereof I hereunto. ailix my signature this 29th day of March, 1929,

' V JACOBRANZ.

tions,{theinner*faees=ot saadfedgeand central

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