Device for Preventing the Opening of Doors of Stoves and the like.
Year: 1897

page_text: Date of Application, 17th Feb., 1897-Accepted, 27th Mar., 1897
COMPLETE SPECIFICATION.
A Device for Preventing the Opening of Doors of Stoves
and the like. 0
I, SIGISMUND VON ZAKRZEWSKI, of No. 16 Bahnhof-Strasse, Kruschwitz, near
Posen, German Empire, Doctor of Philosophy, 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 consists of a device adapted to the doors of stoves, and which is
designed to prevent the opening of such doors by children in the absence of a
responsible person, in order to prevent danger to life and property. The essential
feature of this invention is a stop, constructed in any suitable manner, which can be
adjusted so as to strike against the frame of the door, to which the latter is connected
by hinges, as soon as the door begins to open and thus prevents the opening of the
door.
In order that this invention may be the better understood, I now proceed to
describe the same with reference to the accompanying drawings and to the letters
and figures marked thereon.
Figure 1, is a plan of a door of a stove, provided with the device,
Figure 2, is an elevation thereof,
Figure 3, is a detail view,
Figures 4 and 5 show
construction of the device.
Referring to Figures 1 to 3, a is an axle, adapted to move longitudinally and
resting in bearings b and c. A clamp screw m is designed to fix the axle in its
relative positions, so that it cannot be moved by a child. To the axle a is fixed a
plate d, provided with the stop e mentioned before, which is adapted to prevent the
opening of the door. Figure 1 shows the stop e in the position in which it is
designed to strike against the frame of the door, in order to prevent the turning of
the latter on the hinges h when an attempt is made to open the latter in the
direction of the arrow f.
a plan and elevation respectively of a modified
Figure 2 shows the stop e in the position which allows of the opening of the
door. The plate d is, in this position, in the vertical slot i of the bearing cas
shown in Figure 3. In this position the projection e is in approximately a plane
passing through the hinges of the door parallel to the latter, and the door can
therefore be opened.
When the door as shown in Figure 2 is to be secured against being opened, the
axle a is pushed to the left until the collar k strikes against the bearing b. The
slot y of the plate d is then opposite to the plate c which serves as a bearing for
the axle a and which prevents the rotation of the latter in the position shown in
Figure 2. When the axle a has been thus moved the plate d may be rotated from
the vertical position, shown in Figures 2 and 3 into the horizontal position shown
in Figure 1. The bearing plate c has a projection / in order to prevent the plate d
moving too far down. If now, the screw m is screwed home firmly, so that a child
cannot loosen it, then the door is secured against being opened in accordance with
this invention.
Another arrangement may be combined with the device to further secure the
door. In this case the axle a has a projection n which passes through a recess o
of a pivotted disc P when the plate d is rotated into its horizontal position after the