Improvements in and connected with Photographic Plate Changing Apparatus.
Year: 1895

page_text: Date of Application, 21st Dec., 1895
Complete Specification Left, 21st Sept., 1896-Accepted, 28th Nov., 1896
PROVISIONAL SPECIFICATION.
Improvements in and connected with Photographic Plate Changing
Apparatus.
We, GEORGES LECOURT and JEAN BOVÉ of 70 Rue Notre-Dame de Nazareth Paris
in the Republic of France both Merchants, do hereby declare the nature of this
invention to be as follows:-
Our invention relates to a case which allows the plates printed in the camera, to be
withdrawn in full daylight, and replaced by new ones.
The case is furnished with two slides moving in grooves and provided with handles
by which they can be pulled out. These handles are hinged and lie flat against the
frame.
The slides may be entirely withdrawn, so that nothing but the case will remain.
On each side of the entrance to the grooves, velvet-covered springs are secured, for
the purpose of stopping or closing the case, when the slides are altogether withdrawn.
In the chambers, or compartments of the camera, slides are provided, which fit in
the side grooves of the cases.
One of the compartments, the vertical one, is provided with a vertical door behind
which a spring is fastened at one end, the object of which is to push forward the
plates.
The horizontal compartment is closed by a corner door opening downwards.
Under the horizontal compartment receptacles are provided for the slides.
In order to load or fill the photographic apparatus, it is sufficient to open the door
of the horizontal compartment to take an empty case and withdraw a slide from it,
giving it the appearance of a box without a lid to insert it in the horizontal
compartment and push it to the bottom, taking care to keep uppermost the side
without a slide.
Take a second case which has been previously fitted with the number of plates it
can contain (the number being limited only by the capacity of the case) insert it in
the vertical compartment and push it to the bottom, taking care to keep the side
marked "Front," turned towards the inside of the camera; then turn towards
yourself one of the slides and insert it in the receptacles under the horizontal
compartment, draw out the second slide and insert it also. Lastly, close the little
corner door and the apparatus is ready for the placing of the plates. It will be
understood that the gelatinised side of the plates must be turned to that side of the
case which is marked by the word "Front.'
Each printed plate falls from the vertical case into the horizontal or receiving case.
The liberation of each plate is effected by the help of a special mechanical contrivance
adapted to each system used for changing the plates.
When all the plates contained in the vertical case have fallen into the receiving case,
the operator opens the little corner door and takes out one of the slides placed in the
receptacles. Then the receiving case is shut and is drawn out, the case placed in
the vertical compartment and which is empty is also withdrawn; a slide is put back
into it to make a bottom and it is slided into the horizontal compartment so as to
make it serve as a receiver; another loaded case is then taken and placed in the
vértical compartment as has been already explained, the slides are drawn from the case

page_text: and placed in the receptacle whereupon all is ready to recommence printing the plates
contained in the new case. Any number of these cases may be kept in reserve.
Dated this 18th day of December 1895.
L. DUVINAGE,
Agent for Applicants.
Improvements in and connected with Photographic Plate Changing
Apparatus.
GEORGES LECOURT and JEAN BOVÉ of 70 Rue Notre Dame de Nazareth, Paris
in the Republic of France both Merchants, 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:-
Our invention relates to a case which allows the plates exposed in the camera.to be
withdrawn in full daylight, and replaced by new ones.
In the accompanying drawings,
Fig. 1 is a front view of a photographic apparatus, showing the two chambers or
compartments intended to receive the cases.
Fig. 2 is a section of the case, taken on the line ƒ of Fig. 4.
Fig. 3 is a longitudinal vertical section of an apparatus furnished with our
cases.
Fig. 4 is a broken view in elevation of our case.
Fig. 5 a section taken on the line g of Fig. 4 and
Fig. 6 is a longitudinal horizontal section of a photographic apparatus, showing
the arrangement of the two case-chambers.
The case Fig. 4 is furnished with two slides moving in grooves and provided with
handles i, by which they can be pulled out. These handles are hinged and lie flat
against the frame.
The slides may be entirely withdrawn, so that nothing but the frame will remain.
In Fig. 2 one of the two slides is shewn, half pulled out.
On each side of the entrance to the grooves, velvet-covered springs J are secured,
for the purpose of stopping or closing the case, when the slides are altogether
withdrawn.
In the chambers, or compartments, a, b slides h are provided, which fit in the side
grooves of the cases.
The compartment a, is provided with a vertical door, d, behind which a spring is
fastened at one end, the object of which is to push forward the plates.
The compartment, b, is closed by a door, c, opening downwards.
Under the compartment & receptacles, e, are provided for the slides.
In order to load or fill the photographic apparatus it is sufficient to open the
door Fig. 3, to take an empty case and withdraw a slide from it, giving it the
appearance of a box without a lid, to insert it in the horizontal compartment b,
and push it to the bottom, taking care to keep uppermost the side without
a slide.
Take a second case, which has been previously filled with the number of plates
it can contain (the number being limited only by the capacity of the case), insert it in
the vertical compartment a, and push it to the bottom, taking care to keep the side
marked "Front," turned towards the inside of the camera; then draw towards
yourself one of the slides and insert it in the parte of the apparatus, draw out the
second slide and insert it also. Lastly, close the little door c, and the apparatus is
ready for the placing of the plates. It will be understood that the gelatinised side
of the plates must be turned to that side of the case which is marked by the word
"Front."

page_text: "
or
we have
Each exposed plate falls from the vertical case into the horizontal
receiving case. The liberation of each plate is effected by the help of a special
mechanical contrivance adapted to each system used for changing the plates. As our
device may be used with all the photographic cameras, called "detective
shown, in Fig. 3 the little hook of the mechanism which causes the plate to pass
under, the impediment m which retains it in position, the said hook being moved by a
handle designated M in Fig. 3. This handle or crank describes a complete circle in
the direction shown by the arrows, the hook depresses the plate p, as well as a
spring R, holding it down until the former has passed under the upper obstacle and
falls into the receiving case as shown by the large arrow.
The fall of the plates is slackened by means of the springs n secured to the walls
(inside) of the camera.
When all the plates contained in the vertical case have fallen into the receiving case,
the operator opens the little door c, and takes out one of the slides placed in e. Then
the receiving case is shut and is drawn out in the direction indicated at 6 by the
arrow; the case placed in a, and which is empty, is also withdrawn ; a slide is put
back into it to make a bottom, and it is slided into the part b, so as to make it serve as
a receiver; another loaded case is then taken and placed in a, as has been already
explained, the slides are drawn from the case and placed in e, whereupon all is ready
to recommence exposing the plates contained in the new case. Any number of these
cases may be kept in reserve.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
1. The use of two cases one of which is filled and the other empty, for changing the
plates of photographic apparatuses.
2. A case for changing plates distinguished by slides with handles and which can
be used indifferently to contain either fresh or exposed plates, the whole as described
in the above specification and for the purpose specified.
Dated this 19th day of September 1896.
חזזזז
L. DUVINAGE,
Agent for Applicants.