DE187782C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

■ - M 187782 CLASS 2a. GROUP

Addendum to patent 161659 of February 10, 1904.

Patented in the German Empire on March 7, 1906. Longest duration: February 9, 1919.

By patent 161659 there is already an oven with indirect heating and protected false ceiling above the oven, in which the ceiling near the door is wholly or partially interrupted, so that at this point the top heat acts on the baked goods without weakening them. The purpose of the present invention is the in such ovens occurring difference between the strength of the heat at the front and back end of the oven to balance. This is achieved by a screen whose Breakthroughs after the door progressively increase in area. If you make the openings adjustable, you can regulate the top heat as desired.

Exemplary embodiments of fixed and adjustable radiation shields are shown in the drawings.

Fig. Ι shows the general arrangement of a radiation shield in a tube oven,

Fig. 2 shows a fixed screen with longitudinal,
3 shows one with crossbars.

4 to 6 show screens with terminators rotatable about vertical axes.

Fig. 7 shows the connection of the screen according to Fig. 3 with a parallel movable one End piece,

8 shows a screen with terminators rotatable about horizontal axes.

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The tube oven shown in Fig. Ι is of the usual type. α is the furnace, b the hearth, c the mouth hole, d, d are the hot water pipes, e is the radiation shield.

According to the invention, the perforations of the radiation shield widen from the rear part of the furnace to the mouth hole c to progressively. For this purpose, you can either use longitudinal slats with a width that decreases towards the front, i.e. triangular or lancet shape, or you can arrange transverse slats at an increasing distance towards the door.

Fig. 2 shows the former embodiment. The slats e are triangular, but can also be delimited by any curves. It is only essential that they taper towards the mouth hole. They can either, as the upper part of FIG. 2 shows, be divided up to their base lying on the combustion chamber α or, as the lower part of FIG. 2 shows, collide at any distance from the rear wall, so that in the rear part of the Cooker where the top heat is greatest, a full ceiling is created. The tips of the slats lie on a crossbar or are otherwise attached.

In the embodiment according to FIG. 3, a wide plate h is provided in the rear part of the hearth space facing the furnace;

Claims (8)

in the front part there is a number of narrower slats i, i, the distance between them getting bigger and bigger towards the front. In both forms, the slats can be replaced by a full plate with cutouts. Adjustable sliders or flaps are provided to further regulate the upper heat. 4 and 5 show the arrangement of ίο control slides for the radiation shield according to FIG. 2. Above or below the slats e, the sliders k, which are designed in accordance with the slats, are rotatably mounted. The front, pointed ends of the sliders rest on a common rod / with pins m which encircle the sliders. A handle η is used to adjust all slides at the same time. In the lower part of FIG. 4, the slides k are fully open, i. H. drawn in the position in which they completely coincide with the slats e. While in FIG. 4 the pivot points of the slats k are at the rear end of the fixed slats e, in the embodiment according to FIG. 5 they are located in the middle of the fixed slats e. A shape similar to that of FIG. 4 is shown in FIG. 6. Here the slats e and slider / do not taper forward, but have the same width over their entire length. The slat system itself does not result in a progressive increase in the passage openings forwards, this is achieved here by adjusting the slide f, whereby triangular spaces are created, the base of which is directed towards the mouth hole. The control of the intermediate ceiling equipped with crossbars according to FIG. 3 is done by a similar system of crossbars, which is pushed along above or below the fixed grid. The narrower openings facing h are then covered completely or for the most part, while the larger ones at d are only covered to a smaller extent, since the width of the crossbars is the same from front to back according to the lower system. Such a screen can run on rails ν (see Fig. 7) below the grid. Fig. 7 shows the union of the grid according to FIG. 3 with. a screen w consisting of a plate and slidable on a track ν, ν, which can be adjusted from the outside by means of a handle. Depending on the setting of the screen, the more or less strong irradiation of the front respectively. rear part of the stove. The fixed screen is dimensioned so that it provides the most uniform possible irradiation of the hearth space; for there is an excess of radiation sometimes in front, sometimes behind, depending on the strength of the fire, the draft, and the conditions of the outside air. 8 shows an embodiment of the umbrella in which flaps which can be rotated about longitudinal axes are provided in place of slats that can be displaced. A series of lancet-shaped strips ρ, ρ runs, as in FIG. 2, with the tips forward. Between them are triangular flaps 0, 0, which can be rotated about axes r by means of handles q. Depending on the setting of these flaps, the gaps between the strips ρ, ρ are enlarged respectively. scaled down. If the flaps are vertical, they allow the top heat to act freely on the baked goods, since their width is not an option as a restriction of the irradiation area. A more extensive adjustment can be achieved if the flaps p, p are also equipped with axes of rotation u and handles t. This design allows the umbrella to be temporarily completely inoperative by placing all the flaps vertically, so that the baking heat can have no weakening effect. Patent-A ν Proverbs: 1. Oven with indirect heating and built-in ceiling above the oven according to patent 161659, characterized in that the in the as radiation shield formed false ceiling located fixed or adjustable openings from the boiler room the mouth hole progressively increase in size. 2. false ceiling according to claim 1, characterized in that the on the fixed screen part located openings of triangular or lanceolate, with their wider part after the mouth hole lying shape (Fig. 2). . 3. False ceiling according to claim 1 and 2, characterized by slats rotatably attached to the fixed screen, through which when sliding over the fixed part of the screen the progressively on Size increasing breakthroughs are reduced (Fig. 4 to 6). 4. false ceiling according to claim 1, characterized in that the fixed The screen part consists of a series of crossbars, the distance between them in the direction after the entry door increases (Fig. 3). 5. false ceiling according to claim 1 and 4, characterized by one on the fixed part of the screen, sliding system iao of plates, which in their shape correspond to the fixed screen part (Fig. 3). 6. false ceiling according to claim 1 and 4, characterized by a transverse to the slats of the screen slidable plate (Fig. 7). 7. false ceiling according to claim 1, characterized by a number of lengthways of the hearth area horizontally arranged axes rotatable flaps, the width of which progresses towards the mouth hole increases (Fig. 8). 8. false ceiling according to claim 1 and 7, characterized in that the whole screen consists of flaps which progressively increase in width, which alternate with the broad and narrow side directed towards the mouth and can be adjusted individually or in groups (Fig. 8). 1 sheet of drawings.