IMPROVEMENTS IN FASTENINGS FOR DOORS AND WINDOWS
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by Prosper Dessouroux, Nicolas
Derouette, and Nicolas Toussaint at the Office of the Commissioners of
Patents on the 12th February 1880.
PROSPER DESSOUROUX, NICOLAS DEROUETTE, and NICOLAS TOUSSAINT, all of
Liège, Belgium, "IMPROVEMENTS IN FASTENINGS FOR DOORS AND WINDOWS."
The apparatus is composed of a box or caso in metal A, which holds the
mechanism; B, the principal piece to move the iron window bars; 1), the window
bars; E, the plate covering the box A. Figures 1 to 9 shew the apparatus
particularly intended for window fastenings; Figures 1 and 2 give two side views
of the box A with the apparatus B, the window being shut; Figures 3 and 4, the
same views, the window being open; Figure 5, a view of the upper face, and
Figure 6 a view of the lower face of the box A and apparatus B; Figure 8 is a view
of the lower face, and Figure 9 a longitudinal section of the apparatus B.
Figures 10 to 17 represent the apparatus particularly applicable to doors;
Figure 10 is a side view of the box A with the apparatus B, the door being open;
Figure 11, a view of the upper face; Figure 12, a view of the lower face of the
apparatus, the door being shut; Figure 14 is a view of the side face of the apparatus;
Figure 11, the upper face; Figure 12, the lower face of the box with the apparatus B,
the door being shut; Figures 14, 15, 16, and 17, represent the apparatus B alone;
Figure 14, a side view; Figure 15, a view of the lower face; Figure 16, a section
line a, b, and Figure 17, a section line C, d.
The piece B, which by a stem G is united to the cross or handle F, has two grooves
in C, C, of which the rims form inclined planes. In these grooves C, C, are fitted
laterally the window bars or rods by tongues or studs C', C'. These tongues aro
formed exactly to correspond to the inclined planes of the grooves C, C, and fit
exactly into these latter.
The apparatus works thus,-
To shut and fix the window, pressure is applied to the handle F, by which the
piece B is moved away from the plate E and the tongues C¹, C', sliding on the
inclined faces of the grooves C, C, the iron bars are thrust out and the window is
fastened, relatively it fixes itself.
To open the window, the handle F is pulled, the pieces B follows the movements
of the handle, and approaches to the plate E, the iron bars D, D, by their tongues

page_text: C¹, C', slide in the grooves C, C, and approaching to each other, and thus disengage
themselves from the fixed part or frame of the window.
In these movements the iron bars D, D, rest always geared by the tongues C', C¹,
in the grooves C, C.
The iron bars are guided in their movements by the pieces H.
A modification of the apparatus, and specially intended to replace the lever of
doors with two openings, is represented Figures 10 to 17.
The cross or handle B is replaced by a nut K fixed to the apparatus B. This
nut K is provided with a hole L (Figure 17 in section and dotted lines Figure 10).
The piece P which turns on pivot I gears by its curved part into the opening L,
and serves to work the apparatus, that is to say, to give it its to and fro
motion.
The door being shut, to open it it suffices to push upon the nut K, this moves the
piece P, which then comes out of the plate E; acting on this piece P from the top
downwards, its curved part presses on the pieco B which in its movement brings
together the two iron window bars, and thus operates to open the door. To shut
the door it is only necessary to push the picce P into its first position. Either of
these constructions can be applied to doors or to windows indiscriminately.