US 3102942 A
Description (OCR text may contain errors)
p 3, 1963 L. LEFEBVRE v 3,102g942 SECTIONAL OVEN UNIT Filed Jan. 9, 1956 2 Sheets-Sheet 1 INVENTOR. F L L EF-E 5 (/RE Sept. 3, 1963 F. L. LEFEBVRE SECTIONAL OVEN UNIT 2 Sheets-Sheet 2 Filed Jan. 9, 1956 INVENTOR. FTL. L E F E5 VH5 suitable for baking purposes inindustrial.
. 3,102,942 v SECTKQNAL (EVEN UNIT Fredrick L. Leiehvre, 1967 E. 57th St., Cleveland, Qhio I Filed firm. 9, 19%,Ser. No. 558,008.
u I 2 Claims (Cl. 219--35) This invention'relates to ovens'a-nd primarily those applications, and more particularly sectional ovens.
Generally speaking ovens in the: class to which this invention is directed are presently beinglfurnished on-the' basis of customdesi-gn for 'a specific application and as a result are productsof-costly engineering and design for each individual set of conditions; I I
I :The; broad purpose of this invention is to provide standard heating units which may be combined in a manner to I meetiwidely varying conditions, such conditions being largely. predetermined and thus reduce or eliminate the necessity of expending engineering and design time or skill. The foregoing is possible because such skills may be availedof to initially determine conditions which can be met and} provide tabulation ofcombinations requiredto ,rneet the'same, obviating subsequent resort thereto Simply. stated, the object of this invention is to make possible the provision of quantities of basicele-ments and units which may be combined in accordance with predetermined calculations to produce 'results -usuallyonly pos I sible after custom production ofa corrlplete' 'oven.
In carrying out the foregoing, it is an object hereof to provide a'single basic heating unit which may be arranged with duplicates thereof to provide an oven section, and the oven section'in turn simply aligned'and connected with a similar one or ones so asto produce a complete oven with substantial savings in labor and material. F
' A further. object of the invention is to provide heating units which are substantially rectilinear, being somewhat elongated; arranged-.iwith sides in alignment, the ends 'beingrfastened to common structural. members, one lat each end. The structural'mem'bersare in turn So arranged as to enablealignment thereof with a correspondin-g structural member of an adjacent similar section'landthus provide a long row if desired and a conipiletegoven thereby. I Yet another-object of the inventionis to prov-ide the I units and sections abovedescribed, where'the structural members 'or certain of them may comprisea-raceway orraceways as the easetrna y be, thus. serving a .dual purpose thereby. g 1 Another object of the invention is to provide the raceways described, whether a't'single one'for each unit 013 3. pair as will usually be the "ease,"one at each en'd rot each section, arranged so astoreceivetherebetween, suitable" insulation, and further of such s'liape as to enable the" art sts a ICE stood from a consideration [of the specification appended hereto and shown in the drawings wherein:
, EEGUREI is a perspective view showing an oven sec-v tionxconstructed in accordance with the invention with certain of the parts omitted and indicating more particularly the structural members provided. I
FIGURE 2 is an end view of an oven sectiongsimilar to FIGURE 1, with .certainof the supporting means therefor being illustrated. n
FIGURE 3 is an enlarged sectional View, fragmentary innature taken about'on theline 33 of FIGURE '2 looking inthesdirection of the arrows. FIGURE 4 is a view in elevationof a single. showing the relationship of the parts and structural members as well as the electrical conductors availed of therein. FIGURE Sis a view in elevationyon a somewhat reduced scale showing one form of oven as involving the assembly of three sections shown in other views in indi vidual parts and suggested means for supporting said see- I tions in alignment. w
FIGURE G is a verticalsectional View taken about on the line 6-@ of, FIGURE 5. 1
FIGURE 7 is a perspective view of one of structural partsycomprising a heater unit body;
Referring now to FIGURES 1 and 7 initially, the oven section generally denoted A is seen as being com-prised. of I a numberof rectilinear bodies 1, the :same .being in the form of relatively long narrow and somewhat shallow pan-like parts including longitudinal sides 2 and 3, a bottom 4--and=the-end s 5 and 6 ofrsnbstantially duplicate conformation including as they do the notches (Sr-open ings '7 ands respectively. f
Whereas the illustrations of the show that the' oven section A is comprised of our heater units '1 it will be understood that. units designated"1a and l'bumay be more widely spacedflas to thieiriside to side relationship 'so that 1a furtherunit may be inserted therebetweenl. and thus three units in alignmentlwill be provided." In-order to support the'sides thereof insubstantial engagemenuat least as.
to those illustrated in* the position 1a and lbaof" FIG-' URE 1, structural'meinbers denoted 10 may be provided,
thesemernbers' being U-shaped in -crossse'ction as illustrated in FIGURES including sides 11"and'l2 with a bottom iiifthe "sides -IIl and- 12- being eqnippedwith covering of the insulation and retaining ofthesame in 3 the units and structural members'are coniprised of irisulating units or devices, mounted in the members and including insulating parts, and conducting parts which are equivalent to. bolts, the necessary nuts being used as required. i
Other and further objects of the invention will be underis provided.
inturned flanges 11a 'andlZa' for st'rengthincreasing purposes, .theistructur al member. =10" as a whole being a truncated V inelevation'or what mayb'edescribed as av ltwill be understood that the structural member 10; herein being described is composed'fof metal, formed in the [transverse and longitudinal'sbape shown or, substan- I tiallyi.- similar thereto with any preferred; manner of fabr-ication: being resorted toso that a rigid unitary element Since" the contemplationhereof is one in whieh'electric energy is preferred as'the source of heat generated, and furthertubular electric elements are furnished, the said elementsbeing' i-ndicated' at 14- in 2, it is neces:
sar'y toprovide suitable electrical connections therefor in order to arrange the same any preferred circuit man ner. For this'purpose with the tubular heating elements I 14 in'iplace, suitable connections are made as by means of :the wires 15 v for example as shown'in' FIGURE 2, the: 1 wires: 15 'beingconductors' and illustrated also in FIG-' URE 3 as extending from each end of each tubular ele-- merit 14 into engagement with an insulator part equivalent to a bolt and denoted .16 the said conductor 15 being maintained in conjunction with the bolt; lfiby means of the nuts 17 and 18. A preferredjform of ceramic in .Isulator may be furnished, indicated at 19, the belt or Federated Sept. 3,1963 7 section the basic several figures herein the units 1' iii-alignment and i with i q: threaded member '16 extending through the bottom 4 at the end of the unit 1, the bolt further extending through I vthe opening 19a and through a corresponding opening formed in the bottom 13 of the structural member 1 previously mentioned. 'A similar or duplicate ceramic Y insulator 19 may be providedon'the inner side of the xbottorn :13 and other nuts 20 may be furnished engaging thebolt or threaded member 16,a further nut 21 being providedv to connect a conductor 22 thereto, the conductor 22 leading to'a'ny suitable source of electric energy 7 5 u'nderthe control of a switch 23 such as shown in FIG- "URE 4, the conductor such as 22 being illustratedlikewise therein.
Fromxthe foregoing description and bearing in mind that there is no other mechanical connection of the I structural members 10 with the units 1, exceptthose'just described and actually comprising insulator units as well as mechanical connections, a rigid structure is nevertheless. provided. This rigid structure results from the fact a that there" are four insulator units at each end of the members oru-nits '1, connected as they are to the structural 'me mbers 10, the conductors 22 being mounted within the structural members 10 and thusthe structural members 10 acting as raceways therefor.
It is readily understood that the provisionof the v notches 7 and 8-is for the express purpose of positioning the tubularheating elements 14 therein and they may be retained in such notches in any preferred manner, not particularly further disclosed herein. v i
As will be further appreciated, the structural members 10 or raceways as same may be preferably designated,
are provided, one at each end of a group of heater units v which basically comprise the members lrdescribed in detail heretofore, with'thebodies v1 suitably fastened thereto by the insulating units in the manner describedfand as showri'in FIGURE 2 in end elevation, the configuration ofthestructural member or raceway is suchas to provide I verticalbeating units as well as upper and lower angularly' positionedu'nitsb 5 Inladdition the sides 11 of the structural elements10 are provided with suitable openings such as 25' through which fastening members such as nuts and bolts may be introduced, whereby when a-series of sections whicli'are -1 indicated by thenotation A are placed in alignment .'lengthwise,wasillustrated in FIGURE 5, adjacent lcorre 1 spondingsides '11 of similar'and correspondingly arranged v raceways'f10 may befastened together. At the innerfisides, fastened to, the parts 12 and extending down:
wardly' therefrom so as to support the sections A at any preferredheight areverti-cal angle iron mernbers such as, 26 and 27. Longitudinal-brace members 28 may be furnishedto stiffen the parts 26 transverse members are shown they obviously may be and 27 and while no provided readily and without any particular engineering t calculation being required Since it will be .obvious that suitable reflector member'sj14amay be provided within the heater units and number of units 1 may be provided by increasing or decreasing the size of the structural members 10 correspondingly. Thus in order to provide for a large variation in requirements, the basic elements such as the units 1 may be provided as standard parts and large numbers thereof fabricated in advance of use, similarly structural members or, raceways 10 being fabricated to accommodate a range of units 1.
Iii-W1 1] therefore be understood that when certain conditions of use are to be met, by predetermining the output of the heating elements which may be accommodated and thus ascertaining how many heating elements are reunits including the bolts or threaded members 16,, the
' portions may be provided for the raceways such as illusthelbodiesf -1' thereof, adjacent and behind the tubular elements 114 provided, it will also be understood that a I substantial amount" of heat is present and'therefore it is desirable to insulate the sections at the rear thereof and for that-- purpose FIGURE 6 is referred to as *wellas FIGURE 5 illustrating the insulation material 29 and being in place therein'a cover such as being provided thereover to retain the insulation material between the raceways or structuralmembers 10, the said cover '30' lbeing f astened in any suitable manner to s'uclipnaceways.
-, Whereas FIGURE 5 illustrates the possibility 'of arranging oven sections in longitudinal series, it will be further, understood that an increase or decrease in the,
nuts 17 and 18, and the ceramic parts 19', additional nuts 20 and 21are provided to not only act as insulatin parts but further to mechanically fasten the units 1 to the raceways -10 without resorting to other fastening means therefor. It will also be clear that suitable cover trated at 31 in FIGURE 1 in the form of a plate fastened to the flanges 11a and 12a of the raceways 10. I Whilethe illustrations in therv-arious figures, particularly FIGURES 2, 4 and 6 show angle iron support members such as 26 or 27, itwill be apparent that the oven sections may be supported in any preferred manner, and that the provision ofthe openings or. parts '25 of the respective raceways may enable the connection in longitudinal alignment of the ovensections to provide a complete oven as will be desirable to meet certain conditions. J
1. In oven construction of the class described, in combination, a series of identical heating units, each unit comprising a relatively long narrow box-like body, at least one, electric heating element having electrical terminal means mounted in each body, said bodies being arranged in substantially aligned parallelism, a pair of structural support members of substantially channel-like cross section and generally U-shaped in elevation, said. members each located at respective ends of said bodies.
and extending generally transversely of the bodies, at least one of said structural members comprising a wiring raceway,electrically insulated fastening means securing said-bodies and structural members together, said fasten ing means including electrical conductor means secured to said terminal means and extending into the interior of said structural members;
2. In an oven construction as set forth in claim 1, and additional electrical conductor means in saidyraceway connected 'to' said first-mentioned electrical conductor means and to an electrical power supply.
References Cited in the file of this patent V UNITED STATES PATENTS 2,419,643"
, Hudson Apr. 29, 1947 2,472,293 Groven June 7, l949'--' 2,504,516 Goodell Apr. 18, 1950 2,521,232 Lashells Sep f.5,' 1950 2,569,961 Tidd a Oct 2, 1951 l2,688,l685 Goodell Sept. 7, 1954