US201883A - Improvement in bakers ovens - Google Patents

Description

J. KOHNLE. Baker's Oven;

No. 201,883. Patented April 2, I878.

mine sp a 1120012601:-

m am 6 W m2 N. PETERS. PHOTO-LITHOGRAPHER WASHINGTON, D C.

UNITED STATES PATENT OFFICE;

JOHN KOHNLE, or DAYTON, 01110.

IMPROVEMENT IN BAKERS OVENS.

Specification forming part of Letters Patent No. 201.883, dated April 2,1878; application filed February 25, 1878. i

To all whom it may concern:

Be it known that I, JOHN KoHNLE, of Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Bake-Ovens and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention belongs to that class of bakeovens known as perpetual ovens, and its novelty consists in the construction and arrangement of the parts, as will be hereinafter set forth.

In the accompanying drawing, Figure 1 is a front elevation of my improved oven. Fig. 2 is a sectional view, in side elevation, through the broken line 00 w of Fig. 1. Fig. 3 is a sectional plan view through the line 3 y of Fig. 1.

The frame of my oven consists of four outside walls, A, having an inner lining of firebrick, and an arched top or dome, B, also of fire-brick.

O is the furnace-bed, slanting upward in the rear, as seen in Fig. 2'. Upon this bed is built the division-wall D, which divides the furnace into two equal compartments, in each of which is a fire-box, E, grate-bars F, and ash-pit G, as shown.

H H are the doors in the front wall, which afford access to the fire-box and ash-pit. I I are three or more horizontal metal tubes, passing entirely through the furnace and the side walls, and so placed that their tops are flush with the top of the division-wall, through which they pass. Through these tubes brace-rods J extend, and passthrough the vertical braces K upon the side walls, to which latter they are are connected, as usual, by nuts.

Those portions of the braces K directly over the ends of the tubes are cut away, as at S, Fig. 1, to allow the air to pass freely through the latter. The upper portions of the walls are also braced by rods, in any suitable Way.

Upon the tubes I and the division-walls D is built the oven L, whose floor is preferably composed of tiles, while its sides and top are of fire-brick, the latter arched, as shown. At the two sides and at the back of the oven L is a space of from three to four inches between them and the walls, as indicated by the dotted lines in 3. This space is divided by brick projections a extending at intervals from the sides of the walls, thus forming between them flues. The distance between the top of the oven and the under side of the dome is also from three to four inches.

M is the chimney, located upon the front Wall, and having flues a opening into it from the space between the oven and the dome. These flues are controlled by suitablyconstructed dampers b, provided with external handles for operating them.

In the front wall are the oven-doors c, which afford access to the oven. In the rear wall, at the back of the oven, I place removable plugs d, or registers of any suitable construction.

The advantages and mode of operation of an oven of this construction are as follows:

The heat from the furnaces has free circulation entirely around'the oven, so that it may be heated to any requisite ascertained temperature and be kept so, and thus all danger of not sufficiently baking the bread avoided.

The degree of heat may be ascertained by a thermometer suitably connected to the oven.

By means of the vents d and the drafts and dampers, the degree of heat may be regulated to a nicety.

By the construction of the oven-door in several sections, it is not necessary to open the whole front of the oven when the dough is put in or the bread removed. In this way I make the whole of the oven accessible, without the disadvantage of cooling it off every time it becomes necessary to open it.

By leaving the ends of the tubes on which the oven rests open, air can circulate through and prevent their warping with the heat.

I am aware that in the construction of bakeovens it is not new to locate the oven-chamher over the furnace, with passages around and above it for thefree circulation of the heat; and

also that it is not new to provide more than one door for ingress to the oven, and consequently do not broadly claim such construction.

Having thus fully described my invention, I claim as follows:

1. In an oven, the supporting-tubes I, passmg ul'rdag'h "the outer wells and-open attheii' stiiueted and errafi'ged substantially us s'itiei 'ends to permit the free circulation of the "outfi-ed side air, substantially as set forth. Witness my hand this 18th day of February,

2. The herein-described bake-oven, consistv A. D. 1878.

ing of the outer walls A, dome B, furnace E, Witnesses: JOHN KOHNLE.

division-Wall D, tubes I, oven-chamberL, vents Gms. PEGK,

cl, and. flues a, and dampers 'b, the whole e611- RITCHIE.

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