Jan. 14, 1947. A. BARNSTEINER ET’AL HEATINGAPPARATUS Filed May 8, 1945 2,414,163 5 Sheets-Sheet l ï. wlTNEssEs; FIG' i - INVENTORS Enwuv H.Lac;<woop. RLFoNs BARNSTEINER , ' » _ , B _ . Yy?. ' , . ¿WW T'TORNEY Jan. lli, 1947,. 2,414,163 A._BARNSTE'INER ETAL HEATING APPARATUS Filed May 8, 1943 s sheeté-sheet 2 42 . INVENTORS ALF-ONS EARNsTELNER , ORNEY Jan. 14', 1947. A. BARNSTEINER ETAL 2,414,163 HEATING APPARATUS Filed May S, 1943 5 Sheets-Sheet 3 F“ 1G., S . fw i l l l i l | l l | I l | l l | l l i l I l l I l l l | l i ________________ _.__--__ _______ ___---.j H 65 œ . ZB WITNEssEs; » . W ¿.HsLä; . 5l - » z. l F‘1G~4 . . ÑINVENTOR ALF-oms BARNsTEINER, E_‘Dwm H.LocKwooD. BY 7€’. Í Wy@ A ORNEY ‘ Patented Jan. 14,* 1947 2,414,163 UNITED STATES PATENT OFFICE 2,414,163 HEATING APPARATUS Alfons Barnsteiner and Edwin H. Lockwood, Mansfield, , Ohio, assígnors to Westinghouse ' Electric Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania ' Application May'S, 1943, Serial No. 486,134 1 Claim. (Cl. 219-37) 2 This invention relates to heating apparatus and particularly-to an electric cooking range and it has for an object to provide an improved device of the character described. It is an object of the present invention to pro vide an electric cooking range which is readily As shown particularly in Figs. 2 and 3, the margin of the range at each of the holes I2 is off l) set downwardly, as indicated at 22, to provide a shelf on which the surface unit I3 is supported. Thel surface units are of the readily removable plug-in type and preferably comprise one or more sheathed heating elements 23 coiled to provide a >grid on which cooking vessels are placed for heating. A removable reflector pan 24 is mount switches, terminal receptacles and wiring is fa 10 ed in the platform opening and removably sup cilitated. ' ports the grid. The terminal ends 25 of the Another object is to provide an improved sheathed elements are disposed below the grid method of assembling the switches, terminal re and extend through an opening in one side of the ceptacles and wiring of an electric range. pan. The terminal ends are provided with suit These and other objects are effected by our able contacts for detachable engagement with invention as will be apparent from the follow contacts 26 of a, terminal receptacle 2'I for con ing description and claim taken in connection necting the heating elements to a source of power with the accompanying drawings, forming a part assembled. Another object is to provide an electric range of such construction that assembly> of the when the surface unit is installed in the platform. of this application, in which: Fig. 1 is a rear perspective view of an electric 20 It will be understood that the heating grid and pan are readily removable for cleaning. range in which the Ipresent invention is incor The rear of the range body is closed by means porated; of a vertical panel 28 inserted into the range body Fig. 2 is a bottom plan view of the platform before placing the platform Il thereon and se or top of the range shown in Fig. 1, with the sur cured in any suitable manner, as by sheet metal face units removed; , Fig. 3 is a sectional view taken substantially on the line IlI-III of Fig. 2; Fig. 4 is a View corresponding to the upper portion of Fig. 1, illustrating a modification of the invention; and, l Fig. 5 is a bottom plan view of the range plat form or top shown in Fig. 4, with the surface units removed. The range illustrated in Fig. 1 is generally of conventional construction and includes a body l0 i having an electrically-heated oven (not shown) accessible through a door at the front, and a combined platform and backsplasher II provided with holes or recesses I2 for the reception of electric surface cooking units I3. The range body I l) com-prises an outer sheet metal wrapper I4 forming the sides and front of the range and pro vided with inwardly-turned, vertical flanges I5 at the rear. The wrapper I4 is braced as by members i6 which form a base for the range and also by an upper transverse member I'I. The wrapper and platform are preferably formed of sheet metal and provided with a protective coat ing of enamel to provide a pleasing appearance. The `platform II has horizontal, inwardly- f‘ turned supporting ñanges I9 along the sides and front edge thereof which are adapted to rest upon and be secured to a complementary flange 2l formed on the. upper edge yof the wrapper sheet ^ screws 29, against the inner surfaces of the rear flanges I5 of the wrapper sheet. It has generally been the practice in the past to install the range controls as well as the wiring therefor, after the platform and back panel have been mounted on the range body. Since ranges are usually assembled on a continuously moving conveyor, the speed at which the conveyor can travel is to a large extent determined by the time required to install the electrical apparatus. It is a main feature of the present invention that the installation of the wiring and controls can be made at stations separate from the assembly con veyor and thereby expedite assembly of the range. The controls and wiring are mounted on the un der surface of the range platform and on a sep arate rear panel so that installation and servicing of the controls and wiring is facilitated. As shown particularly in Fig. 3, the surface unit terminal receptacles 2l are secured to the range platform by means of brackets 3l, spot welded to the depending flanges 22 at the plat form openings before the platform is enameled. By securing these brackets to these flanges in stead of directly to the under surface of the plat form, crazing of the enamel is prevented. The surface units are connected to a source of power by controls, which may comprise multi position switches 32 for selectively connecting the heating elements in circuits of different volt ages to provide dinerent degrees of heat. These 2,414,163 3 switches are also mounted on the platform, as by means of angle brackets 33 (Fig. 3) secured to the front flange I9 of the range platform. Each switch is provided with an adjusting shaft 34 adapted to extend through an opening 35 in the front wall of the wrapper sheet, as shown in 4 and is here shown as of the hydraulic type hav ing a capillary tube 56 provided with a bulb (not shown) located in heat exchange relation to the oven. The oven control is adjusted to provide desired oven temperatures by means of a rod 51, Fig. 1, extending through and journaled in the front wall of the range and provided Vwith an Fig. 3, when the platform is placed on the range adjusting knob 58, shown by broken lines in Fig. body. After the platform is in place on the .range 2. The surface unit controlling knobs 36 and the body, a, knob 36 is secured to the projecting end oven control knob 58 are preferably disposed in of each shaft. These knobs may be provided line across the upper front of the range. with suitable indicia for indicating the degree of rll‘he oven control has two load terminals 59 heat obtained for each setting of the knobs. and Bü, and two line terminals 5! and 62. The The terminal receptacles 21 are connected Vto load terminals 5S .and 6b are connected by con the switches 32 by means of conductors 37, which ductors 52 to ‘the oven heating element. The two 15 may be fixed to the range vplatform by means of line terminals 5l and 52 are connected to the one or more wire-supporting and spacing blocks main supply conductors Li and L2. it will be 33 of electrical insulating materialsecu-red, as >by understood `that the oven heating element con means of screws 39, to the range platform. ductors 52 are connected to the oven heating ele Supply conductors ¿il connected to each of the ment after the rear panel 28 has been inserted switches extend to the rear of the range plat 20 in the range body, a suitable opening 63 provid form and are supported under the platform ll ing access to thevterminals of the loyen heating by means of wire-spacing insulating blocks 42 element. carried by brackets ¿i3 spot-welded `to the plat In assembling the range, the back `panel 28 Vis form flange t9. The supply conductors lë-.l ter first inserted into the range body through the minate >in loops lit or other convenient rconnect 25 open top thereof with the electrical apparatus re« ing means so that they may be readily connected ferred to above assembled, thereon, and is then to main supply ‘conductors when the platform is secured to the flanges l5 by means of the .screws `assembled on the range body, as will .appear here 29. The adjusting shaft 5'! may .conveniently be attached tc the o-ven controla'fter .the rearïpanel inafter. y ~ _ y » Y The -platform is also provided with a pilot light 30 45 visible »through an opening in the backsplasher and having terminal straps d6 and il?. Neutral wire N `of the conductors 4l »is connected tothe terminal strap 41, This pilot light is Aconnected in a circuit to indicate when the Voven .heating ele ments are-energized. Y While the range has been >shown adapted for use with a three-wire system, .it is to be under stood that this -is by way of illustration only since the invention is adapted for use with other sup« is in place. Y The wired range platform l l is ythen placed on top of the range body and secured inplace, as by means of screws 54. In placing the >platform `on the range body, the switch shafts 34 are inserted in the openings 35 of the range body, after which the knobs 35 are attached. It is then a simple matter to connect the Wires Lrand L2 of the plat form supply conductors 4.1 to the .wires VL1 and L2 ‘of the main supply conductors 5 l, this connection conveniently being made at the line terminals 6| and 62 of the oven control as shown in Fig. 1. The neutral wire N of the main supply conductors 5I is connected to the terminal strap 4l ofthe ductors of a three-wire supply system. pilot light. The other terminal strap 46 of the rFrom the above description, it will be clear that L". pilot _light is connected to the load terminal 59 of the switches 32, terminal receptacles 2ï, oven the oven control. .pilot >light 45, and the wiring therefor maybe The range surface units I3 Ymay be installedby >applied to the platform at a station or bench .merely inserting them into 'their respective plat separate 'from the assembly conveyor. This ar form openings and plugging their contacts into rangement -permits the bench to be designed for the terminal receptacles 2l, either before .or after ~he convenience. of the worker, thereby `increas assembling theplatform to the range body. ing his or her eii‘lciency, and also decreases .the The range 65 illustrated in Figs. 4 and 5 differs time required to .install the electrical apparatus from the range lll in that surface unit switches 6B on the rangeat the assemblyline. Further, since and their control knobs ß'l, as well as the oven .the electrical apparatus Vis mounted on the under i control knob 68, are carried by the .backsplasher surface of` the platform, as shown in. Fig. 2, `the of the platform Il. By positioning ,controls on bench worker can rapidly install the apparatus. the backsplasher, considerably less wire is re A,ply systems. -For convenience, the supply Ycon ductors 4l are indicated L1, L2 andN correspond ing -tc the conventionaldesignation 4of the con When servicing 0f the range is necessary, it is a simple matter to remove the platform and expose all ofthe apparatus mounted thereon. The `rear panel 28.is also wired before insert~ ing it in the range. Thispanel carries Aan oven >temperature control 49 as -wellas main supply conductors 5l and conductors `5.2 for the oven heating elements' (not shown) . The rear panel is provided witha terminal block 53 to vwhich supply .leads from a three-wire system are connectable. The »main ksupply con .ductors 5 l, also identified as L1, Lz, andzN, extend upwardly from Ythis terminal blcck ythrough an insulating, wire-spacing block 543 fixed to the rear >surface ofthe panel to adjacent the upper end of the panel »28 and terminate in loops for con~ venient connection. i The oven -control Lidmay be any preferredtype quired for connecting the surface unitsrto the main supply conductors, as .is apparent from an inspection of Fig. 5. , , , The construction of the body andplatform of the range 65 may be identical with that of the range .le and it is to he understood that plat form .il and backpanel Y28 are pre-wired before Vassembling them on the `range body I4. The switchesßâ are Vfixed in any suitable man ner to the rear of the backsplasher with their ad justing shafts projecting Lthrough suitable -open ings (not shown) to the front face of the y.back splasher and provided withknobs 6.1, As in the case of the range L5, the terminal receptacles 2l for the rangesurface units are con nected by conductors 59 to the ,switches ßliand one or more wire spacing blocks 39 are provided 2,414,163 6 ' for ñxing the conductors to the under surface of the platform. The switches are in turn connected by platform supply conductors lil, designated as L1, L2 and N, to corresponding wires of the main supply con ductors 5i. This connection is the same as in the case of the range iii except that a common placed thereupon as are specifically set forth in the appended claim. What we claim is: A range comprising a, body, a platform remov ably mounted on top of said body, a surface unit mounted in said platform, a switch mounted on said platform for controlling said surface unit, terminal li, carried` by an insulating block 'i2 conductors carried by and mounted on the under lixed to the rear panel 28, has been provided for side of said platform and connecting said switch connecting the neutral wires N of the conducto-rs 10 to the heating unit, supply conductors connected 'lil and 5| as well as one lead 'i3 from a, pilot light to the line terminals of said switch and ex ïíë. The other lead from the pilot light is con tending to a point adjacent the rear of the plat nected to load terminal 'lil of the oven control 19. form, a vertical panel mounted on the back of The terminals l5, '16, ll, and 'I8 of the oven con said body, an oven control switch mounted on trol are connected, respectively, to conductors 52 15 said rear panel, said oven switch having line ter and the main supply conductors L1 and L2. minals and load terminals connectible respec While the oven control 19 may be identical tively to a source of electricity and the heating with the control A9 of the range IG, the adjusting elements of the oven of the range, and supply rod 51 is replaced by a sheave 8l which is driven cenductcrs mounted on said rear panel and Con by a cable 82 trained over the sheave and a sec 20 nected to said line terminals of said Oven switch; ond sheave 83 journaled on the backsplasher and whereby the supply conductors carried by said rotated by means of the control knob 68. platform and said panel may be respectively While we have shown our invention in several mounted thereon before said platform and said forms, it will be obvious to those skilled in the art panel are mounted on the range body; the supply that it is not so limited, but is susceptible of vari conductors mounted on said platform being con ous other changes and modincations without de nected to the line terminals of said oven switch. parting from the spirit thereof, and We desire, ALFONS BARNSTEINER. therefore, that only such limitations shall be EDWIN H. LOCKWOOD.