Improvements in the Doors of Baking Ovens and for similar Purposes.
Year: 1899

page_text: Date of Application, 10th Feb., 1899-Accepted, 1st Apr., 1899
COMPLETE SPECIFICATION.
Improvements in the Doors of Baking Ovens and for similar Purposes.
-'1
I, JOSEPH ZOLLER, of 88, Hauptgasse, Visegrad, in the Kingdom of Hungary,
Master Baker, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:-
This invention relates to doors for baking ovens and similar purposes and is
designed to obviate the disadvantages appertaining to such doors at the present
time and arising from the necessary removal of such a door when the oven 18 to
be periodically put in order or repaired. In this case doors as constructed at
present, after having been removed from the oven have to be cemented in again.
an operation, which even when carried out with the utmost care renders the
joints liable to become defective.
In consequence it is necessary to fill up such joints with dough to make them
steam tight; it being of the greatest importance to prevent the escape of the
steam from the oven, in order to obtain the best result. This, of course, wastes
a great deal of dough.
This invention consists of a door which always closes the oven steam tight
when shut, without it being necessary to temporarily fill up the joints. For the
purpose the door is constructed so that it need not be removed from the oven
when it is desired to repair the latter or to put it in order The door is con-
structed of two parts, which when both are opened give an orifice which is large
enough to admit an operative into the oven to effect repairs and the like.
general use, that is to say for feeding the articles to be baked into the oven and
removing them therefrom afterwards the lower part of the door only is opened
and the upper part remains closed.
For
In order that this invention may be the better understood, I now proceed to
describe the same reference being had to the accompanying, drawings and to the
letters and figures marked thereon.
Figure 1 is a front view.
Figure 2 shows a vertical section on the middle line of Figure 1.
Figure 3 shows an horizontal section of the upper part of the door, and
Figure 4 shows an horizontal section of the lower part of the door
The door consists of parts b and hinged to a frame a of cast iron adapted to
be built into the oven and having an orifice of suitable size The upper part b,
intended to remain closed when in general use is made of rolled iron plates
rivetted together and hinged to the cast iron frame a by means of hinges d.
The hinges are connected together by a rod e, to which are fixed the parts
of the hinges rivetted to the part 6 of the door, so that the upper part of the
door can be opened by turning the hand crank f situated on the end of the bar e.
In order to secure this part of the door in the lifted or open position, a ring g
is provided on the rode having a recess in which engages when the door bis
open, a detent h pivotted to the cast iron frame a by a pin b. When the door b

page_text: is to be lowered, the detent h must be disengaged by hand from the recess of the
ring g
In order to close the upper part of the door steam tight, a bolt is designed
the construction and movement of which for closing and opening the door is
clearly shown in the drawing
The lower part c of the door is hinged to the frame a by hinges / similarly
to an ordinary oven door
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is:
1st A door for baking ovens and like purposes, consisting of an upper and
of a lower part, of which the latter is opened to charge and discharge the oven;
and the upper part is opened simultaneously with the lower part in order to open-
the whole orifice to admit an operative into the oven for repairs and similai pur-
poses substantially as described.
2nd A door as claimed in Claim '1 in which the upper part of the door, opened
and closed by a crank motion, is secured in the open position by à détenth which
engages in a recess of the hinge ed, substantially as described,
Dated this 10th day of February 1899.