US1876843A

US1876843A - Bake oven

Info

Publication number: US1876843A
Application number: US503455A
Authority: US
Inventors: Bolling Robert
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-12-19
Filing date: 1930-12-19
Publication date: 1932-09-13
Anticipated expiration: 1949-09-13

Description

Sept. 13, 1932. R. BoLLlNG r1,876,843

BAKE OVEN Filed Dec. 19,' 1930 INVENTOR. FUEL-'R7' B01 l ING BY 1:/ C? 5 P 24 ATTORNEYS Patented Sept. 13, 1932 UNITED-STATES ROBERT IBOLLING, F DETROIT, MICHIGAN.

I BAKE ovE'N Appneatie sled n'eeenbe 19,1930. serial No. 503.455. 'l

This invention relates to a1' bake oven and V has to do especially with a rotary oven wherein the articles which are heat treated or baked are moved through the heat chamber. Y The A object of the invention is the provision of an improved bake oven structure, and in this regard there are several novel features V which taken singly, or in combination'servejto'provide an oven of improved operation. VThese points of novelty will be brought out in the detailed description. l

' Fig. 1 isa front elevational view `of v,an oven constructed in accordance with the invention. .1 i,

Fig. 2 is a top plan view thereof. Y Fig. 3 is a vertical section takenon line 3-3 of Fig. 4:. Fig. 4L is a horizontal section taken substantially on line 4 4 of Fig. 3. v

Fig. 5 is a detailed perspective showing the heating unit and the interior of the oven.

The oven consists of a wall structure, and this wall structure may bey of multi-sided arrangement. This is illustrated in Figs. 2` and 4 wherein the particular voven shown is' of octagonal shape. A greater'or less number of sides may be provided. l`The outer wall shown generally VatV 1 is made upjof members which may be in the form of sheet metal plates 2 bent intermediate their length tol form the corners 3. Adjacent plates'arejoinedpreferably on a flat side of the oven, as illustrated at 4:; this joint may comprise a TIV iron which may be constructed by two'an'gle irons placed back to back with the oppositely extending plates suitably united or secured to the T iron. These plates'or sections may be suitably nished as by means of porcelain or the like. As shown in Fig. 1 there may be a central reinforcing band 5. There may be an -inner wall similar to the outer wall composed of sections 6 shaped to correspond to the shape of the outer wall and joined at theirends as at 7 The inner and outer walls may be spaced apart for insulation purposesyand a `suitable insulation material such as asbestos substance 8 may be disposed between the walls. At the bottom of the furnacethe space Vbetween the walls is closed as at 9 'while' the interior of the oven'is preferably provided with a bottom or jent instance there are two.

eration. j unloading the shaft may berotated lby means so ofthehand wheel 30 and the connections floor 10'with an outer bottom or floorV 11between which there may be asuitable insulation 12. The top of the oven may be double having an outer top 13 and an inner top 1 4 with insulation 15 between them. Theinsulation 8,' 12 65 and 15 may comprise substantially onesurrounding body of insulation materiah i As lshown in Fig. 5 the heat unit is shown as having ay fireboX 20, a top 21. j Theoven. is provided with a' suitable door 22 in align- 030' lment with the fire boX. The'fuel may be gas The goods to be bakedinay be disposed on shelves in the oven and preferably there are a plurality of such shelves. In the pres- '(0 j These-"shelves are preferably rotatable, `and for this purpose there is a central shaft 25. The upper shelf is shown at 26,1while the lower 'shelf is at 27, both carriedby the shaft' to be ro- 75 tated thereby. Suitablemeans suchlas an electric motor`28 through reduction 'gears 29 may rotate the sha-ft 'during the baking op- For the purpose of l.loading and shown. l y j y j. Thecentral shaft may bel insulatedfrom heat'kin its lower portion as illustrated ,at

31.` The heated currents may be directed in 85 such manner as to flow across the goods lbeing baked. In this regard the lower shelf 27 may be provided with va central opening Vthrough which the heated currents .pass as illustrated by the arrows. n In this central 9U opening may be positioned a pipe-like member 32 having at its upper end an outwardly extending flange or deflector 33. It will ,be notedlthat the heated currents accordingly pass through the member 32 and by reason 95 of deflector 33 the,y heated. currents are brought up close to the under side of the upper shelf 26. This shelf *is closed or substantially closed in its central portiovrnsbutY its edges are removed from the inner'walls'Y 100 substantially the same heat may be oom-V municated to both; on. the 'othery hand,a predetermined controlled relation may be provided wherein one shelf is a little hotter Accordingly, the delector brings the heated currents'close to the unthan the other.

derside of the upper shelf; the lower shelf may be protected by a partition 34V positoned below the shelf 27. This partition may be raised or lowered as desiredY varyilg the space between it .andthe lower shelf 2 .Accordingly with this partition and with the defiector the arrangement of the parte may vbe such that a substantially unir orm heating action is obtained bothv in the upper and lower shelves. The partition 34 inV close proximity thereto whilev the heated gases are directed up to the upper shelf. The

lpartition 34 and the shelves may be of suitable refractory material.

The partition 34 has `a central opening 35 which-may be in alignment with the member 32.

The heated products of combustion may ass out of the lirerchamberythrough open- 1ngs40 into the lower compartment below the partition 34 and then into fiues 4l in the Wall of theoven. Whereas the fire box may be at the forward side of the oven ythe flues may beat the rear side, as best illusvtrated in Fig. 4. These flues may extend upwardly` in the wall of the oven and direct the produc-ts of combustion into an upperA compartment 42 cut off from the kcompartment containing the shelves and bake goods by a floor 43, and in the compartment 42 thecentral shaft may be insulated asv at 48. The flues 41' may open into the rear'part of the compartment 42 while the smoke pipe may be at Y the front, asl illustrated at 44.

.Thus the products of combustion traverse the lower end of the oven from front to rear, n

pass upwardly into the top of the oven and then vagain traverse the oven from rear to front,l then out the smoke stack. This affords an efficient oven from the standpoint v Iclaim, j

1. In a bake oven, walls defining an enclosure, a plurality of vertically spaced shelves for supporting bake goods, a heat unit in the lower part of the enclosure, the lower shelf being provided with la substantially centrally disposed opening, the upper shelf being substantially closed. centrally but spaced from the walls at its edges, and a deflector associated with the lower shelf for directing heated currents which passthroughthe Vopening in the lower shelf into close proximity with the upper shelf.

2.In a bake oven, the combination of walls defining an enclosure, a heat unit in the lowerpart` of the enclosure, a plurality of vertically spaced shelves for supporting bake Y goods alternately opened and closed near their central portion, andV a deilector meinber positioned to` direct heated current-s which pass through the central opening of one shelf in close proximity tothe upper shelf. Y

. 3. In a bake oven, walls'delining an oven enclosure, a lower rotary shelf, an upper roi tary shelf, `a central opening in the lower protects the lower shelf from the intense heat shelf, a tubular like member associated with said opening for directing heated currents which pass through saidropening into close proximity to the uppershelf.

4. In a bake oven, walls defining an oven enclosure, a heat unit in the lower portion of the enclosure, a lower rotary shelf having a central opening-for the passage of heated currents therethrough, an upper rotary shelf,

and av tubular like member positioned in association with the opening in the lower shelf 'for 'directing heated currents substantially against the under side of the upper shelf.

5. In a bake oven, walls defining an oven enclosure, a heat unit in the lower portion of the enclosure, a lower rotary shelf having a central opening for theA passage of heated currents therethrough, an upper rotary shelf, and a tubular like member positioned in associ ation with the opening in the low-er shelf for directing heated currents substantially againstv thev under side of the upper shelf, said-*upper shelf being substantially closed ink itscentral zone with its outeredges spaced from said walls.

6. In a bake oven, walls defining an oven enclosure, a heat unit in the lower portion of the enclosure, a lower rotary shelf having .a central opening for the passage of heated currents therethrough, an upper rotary shelf, and a tubular like member positioned in association with the opening in the lower shelf for'directing heated currents substantially against the under side of the upper shelf,

said tubular like member having an outwardly flared deflector at its upper end.

7 In a bake oven, walls defining an'oven enclosure, a heat unit in the lower portion of the enclosure, a lower rotary shelf having a central opening for the passage of heated currents therethrough, an upper rotary shelf, and a tubular like member positioned in association with the opening in the lower shelf for directing heated currents substantially against the und-er side of the upper shelf, said tubular like member having an outwardly flared deflector at its upper end, said upper shelf being substantially closed in its central zone with its edges spaced from said enclosure walls.

8. In a bake oven, walls defining an oven enclosure, a heat unit in the lower part of the enclosure, two rotary shelves positioned one above the other, and both above the heat unit, the lower shelf having a central opening therethrough, the upper shelf being substantially closed in its central zone butits edges spaced from said enclosure walls, whereby heat in -currents passes through said opening toward the upper shelf, and a protector partition positioned between the lower shelf and the heat unit.

9. In a bake oven, walls defining an oven enclosure, a heat unit in the lower part of the enclosure, upper and lower rotary shelves for bake goods, the lower one having a central opening and the upper one with its edge spaced from the enclosure walls, a protector partition positioned below the lower shelf, and means for directing heated air currents which pass through the central opening of the lower shelf into close proximity withthe under side of the upper shelf.

10. In a bake oven, walls defining an oven enclosure, a heat unit in the lower part of the enclosure, upper and lower rotary shelves for bake goods, the lower one having a Vcentral opening and the upper one with its edge spaced from the enclosure walls, a protector partition positioned below the lower shelf, and means for directing heated air currents which pass through the central opening of the lower shelf into close proximity with the under side of the upper shelf, said means Y comprising a conduit like member located in said opening of the lower shelf.

, 11. In a bake oven, walls defining an oven enclosure, a heat unit in the lower part vof the enclosure, upper and lower rotary shelves for bake goods, the lower one having a cen- Y tral opening and the upper one with its edge spaced from the enclosure walls, a protector partition positioned below the lower shelf, and means for directing heated air currents