US2002655A - Bake oven - Google Patents

Description

May 28, 1935. R. P. BOLLING BAKE ovEN Filed Oct. 13, 1934 3 Sheets-Sheet l Ill INVENTOR. ROBE/Pr PHIL/F Emu/vs ATTORNEYS.

May 28, 1935. R. P. BQLLING BAKE OVEN Filed Oct. 15, 1934 3 Sheets-Sheet 2 F055 PHIL/P BOLLl/YG ATTORNEYS.

May 28, 1935. p, BQLLING 2,002,655

' BAKE OVEN Filed Oct. 13, 1954 3 Sh eets-Sheet 3 INVENTOR. 2

f5 foals; T P/ 1ILIP-BOLL #vs I J mmafw ATTORNEYS,

Patented May 28, 1935 *um'rsn ST E A N 'oFFIc 1 f 2 002 55 7 a l 1 K E Robert Philip Bolling, etroit, I Application Qctober 13,1934, Serialhlo.748,1e8t

'4 Claims. (014107-59) This invention has to do with bake ovens and it is directed particularly'to an oven of the .type equipped with a reel and used by commercial bakersibvens of the reel type are quite well 7 known in the art, and a number of such ovens are shown in prior art patents wherein a so-called reel is incorporated. The reels have shelves upon which the goods to be baked are placed, such as bread, cakes, rolls, or other bake goods, which shelves arepivo-tally'mounted upon the reel and gravitate on the reel as the reel revolves. The difficulty with this arrangement isthat the individual shelves are unstable inthat they swing,

on the reel, and if thereel is jarred or caused to '3 vibrate for any reason the several shelves are caused to swing, to the detriment of the bake goods thereon. For example, the shelves are loaded and unloaded asthe respective shelves are brought into alignment with an oven door, and in loading or unloading a shelf the reel may be jarred, and the'other shelves remote from the loading door may be caused to rock, to the detriment of the bake goods thereon, particularly where such bake goods are such that such rocking of the shelves will cause the same to fall.

The principal object of this invention is the provision of a reel type oven wherein the shelves swung thereon are individually stabilized. The arrangement is such that the shelves remain substantially horizontal while the reel rotates, but they are heldfrom rocking relative to the reel incident to any force, impact or jar to whichthe reel orshelf or oven is subjected. A further ob-. ject of the invention is a provision of the reel structure wherein the reel ends, which support the shelves, may be adjusted relative to each other, sothat opposite ends of the shelves carried by the reel may 'bebrought into a common plane, thus insurin'g'that the shelves are in a horizontal plane from end to end.

In the accompanying drawings: Fig.'1 is a view of an oven equipped with a reel constructed in accordance with the invention withpart of the oven .wall cut away to illustrate the interior thereof.

Fig. 2 is an enlarged partial end view illustrating the. reel and stabilizing structure, looking substantially on line 2-2 of Fig. 3.

i Fig. 3 is an enlarged "sectional view taken substantially on line 3-4 of Fig. 2. V

Fig. 41s a detailed view illustrating a shelf supporting member. i

"Fig. 5 is anenlarged end structure.

The oven'comprises an outer casing having end detail showing the reel the-'position of the shelvsbn the reel, so that'a walls I and 2 and top andbottomwalls 3 and 4. There is, of course, a rear enclosing wall, and the front wall 5 isprovlded withsuitable openable doors B'used forloadingand unloading the-shelves. The-oven walls may and usually are suitably in- 5 sulated or made of sheet metal linedwith ceramic material, but this detail is not illustrated herein,

as this structure is not important from the standpoint of the present invention. 5 The oven shown is-a gas oven and'the gas is supplied through a gas main! leading into amanifold B'c'cmnected by valvesfl to burne'r'pipes' l0 in the lower part of theoven." This arrangementis likewise shown more or less conventionally and is not particu larly pertinent to the invention}; Thesupply of gas may be controlled by atherin ostatic' element l l,' and a shaft]! -journaled in the: end walls mayextend across the oven, the sarnebeing driven by suitable power means'such as an electric motor l3 operating'through suitable reduction gearing 20l or the like asfat l4, Such ovens may advantageously be equipped with an indicator I 5 having a rotary pointer thereon and operated by suitable means (not shown) from the shaft [2 to indicate 25 baker may know which shelf is in alignment with the doors.- i

The reel may comprise endplates or spiders keyed to the shaft l2 to be driven thereby.- As shown herein the end structure may take the form'of plate 20 with a hub 2 l keyed to the shaft I2 and with arms' 22 secured to the plate as by means of bolts 23. p A plate 26 may be positioned between each twoarnis and it has inclined ends for abutment against opposite arms as shown in Fig.5, and this plate may be secured to the plate 20 in anadjustable manner by a bolt 21. passing through an elongated aperture in the plate 20 as shown at 28. Extensions 24 on each plate 26 are arranged to overlie opposite, arms to hold them substantially flush against the plate 20. The purpose of this manner of mounting the arm to the I reel plate 20 will presently appear. 3

7 structure.

described up to the present time, the several shelves would gravitate and normally remain in a substantially horizontal position, the shafts 30 rocking in the apertures during rotation of the reel. However, stabilizing means are provided so that each shelf is positively positioned and held from rocking relative to'the reel, except as the reel rotates.

To thisend each shaft 30 is provided with a crank arm as at 34 having a bearing pin 35. A stabilizing member 36, which may be of spider form having arms 31, is journaled on an eccentric bearing member 38 which may be fastened to the wall of the oven as shown at 39. The eccentricity of the bearing member 38 is substantially equal to the throw ofthe cranks 34. The end of. each arm 31 is apertured as at 40 for the reception of one of the pins 35. There'may be only one of such stabilizing means provided which may be at one end of the reel as shown in Fig. 3, while the opposite end of the reel, as shown in Fig. 1, may not be equipped with such stabilizing means, since the'rigidity of the reel may be'such that if stabilized at one end the stabilizing effect is sufficient. However, it is within the invention to equip each end of the reel with this stabilizing As shown herein the eccentric bearing 38 is positioned with its throw downward (Fig. 3). In the rotation of thereel-the stabilizing spider is caused to rotate upon the eccentric 38 upon which it freely revolves, and the same positively positionsthe shelves with respect to the 'reel. Considering Fig. '2, it will be noted that all of the shelves remain in a horizontal position and, as shown herein, the shelf supports 33 and the crank arms 34* are generally in parallelism. Considering the uppermost shelf, as shown in Fig. 2, the crank arm 34 extends downwardly and is held by the, arm of the stabilizer connected thereto. Considering that the reel,

as shownin Fig. 2, is rotating counter-clockwise, the eccentricity of the bearing 38 has the effectof increasing the distance between the center of the shaft I 2 and the aperture 40in the stabilizing 1 arm at a rate calculated to correspond to the natural swinging of'the shelf and crank arm 34 by gravity. This increase continues and is greatest in the lowermost position, as illustrated in Fig. 2. Accordingly, when the reel is rotating the shelves have the appearance of gravitating to a horizontal position, yet each shelf is individually stabilized and cannot rock 'on the axis of the shaft 30, except as such rocking is natural- 1y caused by the rotation of the reel. When the reel isstationary each shelf is positively positioned. I 7

When bake goods are placed upon or removed from a shelf in alignment with one of the doors as 6, the shelf may be struck or the reel jarred for one reason or, another, as for example, the

operator may strike the shelf with a loading tool, and when this occurs with the present structure the various shelves are securely held and cannot be jarred into a rocking condition. Likewise any other jar or impact communicated to the oven or reel or single shelf cannot cause rocking of the individual shelves with respect to the reel. Thus the bake goods are not shaken or otherwise disturbed.

Oven reels of the type mentioned herein are rather large, and it is sometimes diflicult to get the supporting arms for the shafts 30 into proper alignment. This difiiculty is experienced in keying the hubs 2| to the shaft l2. If there is only a very slight variation in the keys for the two hubs 2i, this variation will be multipled several times out on the end of the arms 22, with the result that the shafts 3H and the shelves supported thereby do not lie truly horizontal. It is to rectify this condition that the adjustment structure shown in Fig. 5 is provided. Here it will be noted that if the plate 28 is fixedly keyed to the shaft l2, the arms 22 may be pivoted on the bolts 23. In assembling the reel the arms 22 may first be properly positioned by pivotal movement on the bolts and then the plates are positioned so that their ends lie flush against opposite arms, by adjusting their position radially and then the bolts 21 are tightened. Both ends of the reel may embody this adjustable structure, or for that matter only one end may embody this adjustable structure, as adjustment of one end will sufiice to bring the shafts 30 into horizontal position, and the invention is to be construed to cover a reel wherein only one end is thus constructed.

1' claim: I V

1. A reel structure for a bakeoven comprising, a center driving shaft, end plates keyed to the shaft, outwardly extending supporting arms carried by the end plates, shelves swung from the ends of the supporting arms, and means adjustably mounting the supporting arms to one of the end plates whereby the su orting arms maybe brought into correct alignment with the supporting arms on the other end plate.

- 2. A reel structure for a bake oven comprising, a driving shaft, end plates keyed to the driving shaft, supporting arms projecting, radially outwardly from the end plats, shelves for supporting goods to be baked swung fromthe ends of the supporting arms, means adjustably mounting the supporting arms to at least one of the end plates, spacer blocks between the supporting arms and said end plate,'said spacer blocks being adjustably mounted to the end plate by bolt means disposed in apertures'in the end plate and spacer block, and one of said apertures for each bolt meansbeing elongated.

3. A reel structure for a bake oven comprising, a driving shaft, end plates keyed to the driving shaft, supporting arms projecting radially outwardly from the end plates, shelves for supporting goods to be baked swung from the ends of the supporting arms, means securing the inner end of eacharm to at least one supporting plate so that the arms may pivot with respect thereto,.b0lt means and elongated aperture means connecting intermediate portions of the arms of the said one end plate, spacer blocks between the arms on the said one end plate, and bolt means extending through apertures in the spacer blocks and the said one end plate for securing the spacer blocks to the said one end plate, and one of said apertures for each bolt means being elongated.

4. A bake oven structure comprising, walls defining an oven enclosure, a shaft extending across the enclosure, journal means for the shaft carried by opposite walls, one journal means comprising a block secured to a wall and having an eccentric external bearing surface, a spider keyed to the shaft near one end thereof, another spider keyed to the shaft near the opposite end of the shaft, one of said spiders comprising a plate, radially projecting arms pivotally mounted to the plate, adjustable spacer means between adjacent arms whereby the arms may be angularly adjusted to align them with the opposite spider, a plurality of shelves, one swingably mounted between each pair of opposite arms on the two spiders, a crank rigidly associated with ing substantially equal to the eccentricity of the each shelf, and a stabilizing element rotatably said external bearing surface, and said stabilizmounted on the external surface of the bearing ing member holding the several shelves stabilized member and having a pivotal connection with in the position to which the shelves gravitate.

5 each of said cranks, the throw of the cranks be- ROBERT PHILIP BOLLING.

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