An Improved Photographic Dark Slide.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
An Improved Photographic Dark Slide.
We FRANK EDWARDS BROWN and WILLIAM EDWARDS, trading as W. Edwards,
of the Steam Cabinet Case Works, Exeter Street Birmingham, in the County of
Warwick, Photographic Apparatus Makers, do hereby declare the nature of this
invention to be as follows:-
This invention relates as hereinafter described to an improved Photographic
Dark Slide and has for its object to provide a simple, cheap, and efficient means of
making a dark slide for holding photographic plates or films light tight.
Our invention consists essentially of a wood frame provided with two celluloid
shutters capable of sliding in and out for the exposure of the plates or films, the
frame and shutters being so arranged as to exclude all light, the said frame being
provided with a hinged opening for the purpose of placing the plates or films
therein or removing them therefrom.
In carrying our invention into practice we make a rectangular wood frame the
two sides being provided with grooves to receive the shutters which are preferably
made of celluloid. The top part of the said frame we make channel shape in
cross section, into the said channel we fit a strap of soft cloth which is fastened to
the bottom of the channel the ends fitting or lying against the sides of the channel
loosely forming a kind of flap on each side of the division. These said flaps are a
little longer than the depth of the sides of the channel and hang against the
shutters in such a manner as to exclude all light. The act of withdrawing or
closing the shutter causes the flap to press against it. At the bottom end of the
said frame we cut or form a longitudinal slot for the purpose of admitting
photographic plate or film. We fit into the said slot a length of wood which is
connected at one end by a hinge, at the other end we fit a sliding bolt or catch, the
deor thus formed may be opened and closed for admitting or removing the plates
or films and fastened securely. There is a centre division in slide to keep films
o plates always up to register.
We, FRANK EDWARDS BROWN, and WILLIAM EDWARDS, trading as W. Edwards
of the Steam Cabinet Case Works Exeter Street Birmingham in the County of
[Price 8d.]

page_text: Warwick Photographic Apparatus Makers 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 as hereinafter described to an Improved Photographic
Dark Slide and has for its object to provide a simple cheap and efficient means of
making a dark slide for holding photographic plates or films light tight. Our
invention consists essentially of a wood frame provided with two celluloid shutters
capable of sliding in and out for the exposure of the plates or films, the frame and
shutters being so arranged as to exclude all light, the said frame being provided
with a hinged opening for the purpose of placing the plates or films therein or
removing them therefrom.
In carrving our invention into practice we make a rectangular wood frame the
two sides being provided with grooves to receive the shutters which are preferably
made of celluloid. The top part of the said frame we make channel shape in cross
section, into the said channel we fit a strap of soft cloth which is fastened to the
bottom of the channel the ends fitting or lying against the sides of the channel
Irosely forming a kind of flap on each side of the division. These said flaps are: a
little longer than the depth of the sides of the channel and hang against the
shutters in such a manner as to exclude all light The act of withdrawing or
closing the shutter causes the flap to press against it. At the bottom end of the
said frame we cut or form a longitudinal slot for the purpose of admitting a
photographic plate or film. We fit into the said slot a length of wood which is
connected at one end by a hinge; at the other end we fit a sliding bolt or catch
the door thus formed may be opened and closed for admitting or removing the
plates and be fastened securely. In the slide is a centre division to keep the films
or plates always up to register. Our invention may be modified in any detail as
may be necessary to carry the same into effect.
We will describe our invention by reference to the accompanying drawings the
same letters of reference indicating similar parts throughout:-
Figures 1 and 2 show in front and side elevation respectively a photographic dark
slide made in accordance with our invention..
Figure 3 is a cross section on line a b. Figure 4 is a detail part of the said slide.
A is a wood frame provided with two celluloid shutters 13, 13, capable of sliding in
and out; the door D is hinged to the said frame at C by which it is opened and
closed as shown in dotted lines for the purpose of placing the plates or films in the
slide, the said door is held in its closed position by means of the sliding bolt E
shown detached at Figure 4. F is a channel lined with soft cloth H which forms
a flap I against the shutters B B excluding all light from the plates or films, J is
a centre division for keeping the films or plates up to register.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
The Improved Photographic Dark Slide substantially as and for the purposes
hereinbefore described set forth and illustrated in the accompanying drawings.
Dated. this-28th day of June 1897.
WILLIAM HENRY BARACLOUGH,
36 Temple Street Birmingham, Agent for the Applicants.