Improvements in Camera Slides or Holders for Cut Films.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Camera Slides or Holders for Cut Films.
I CHARLES PHILIP MACCARTHY of The Camera Club, Charing Cross Road,
London W.C. Gentleman M.A., Trinity College, Cambridge, and F.R.G.S. do
hereby declare the nature of this invention to be as follows:-
This invention relates to the cases usually termed slides or dark backs in which
one or two sensitive plates may be held in order that they may be exposed to images
projected in a photographic camera, and its purpose is more particularly to fit such
camera slides or plate holders that they may be used with such sensitive plates as
have for the support of the film proper, materials of a yielding nature such as
celluloid, such plates being generally termed "cut films"; in order that such
"films" may be easily placed in the slide, more particularly in those termed "book
slides" without needing to be placed each in a special carrier or frame to be inserted
in the slide.
To fit the ordinary double slide consisting of two hinged parts opening book
fashion to receive two films without carriers, the dividing plate which is usually of
metal more or less flexible and provided on one or both sides with a spring or
springs, is replaced by a rigid dividing plate preferably of wood plane on both faces
and of such thickness that there is left between its face and the rebate of the frame
space sufficient only for the ordinary thickness of a film of the nature previously
described, that is to say of one film on each side of the dividing plate.
This rigid dividing plate is preferably hinged along one of the sides of the frame
of the slide and may be secured in the frame also by a spring catch.
In applying the invention to a single slide, that is to say, to one for holding one
film only the back of the slide is provided with a suitable door having near its edge
grooves and ribs to engage with corresponding ribs and grooves in the frame of the
slide when the door is closed in order that light may not then be admitted through the
back of the slide. The central interior surface of this door is plane and projects
sufficiently to afford space for a film between it and rebate of the frame when the
door is closed. This door may also be fastened by a bevelled spring bolt let in
flush with the back of the door and having hinged to its end a ring which will
serve for drawing back the bolt and for opening the door.
Dated this 6th day of August 1895.
HERBERT HADDAN & Co.,
Agents to Applicant.
Improvements in Camera Slides or Holders for Cut Films.
1, CHARLES PHILIP MACCARTHY, M.A., F.R.G.S., of The Camera Club,
Charing Cross Road, London, W.C., and New University Club, St. James' Street,
and care of Messrs. Turner of 1 Bathurst Street, London, S.W., Gentleman, 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 the cases usually termed slides or dark backs in which
ונס..._fD

page_text: one or two sensitive plates may be held in order that they may be exposed to images
projected in a photographic camera, and its purpose is more particularly to fit such
camera slides or plate holders that they may be used with such sensitive plates as
bave for the support of the film proper materials of a yielding nature such as
celluloid or paper, such plates being generally termed "cut films," in order that
such films" may be easily placed in the slide, more particularly in those termed
"book slides without needing to be placed each in a special carrier or frame to be
inserted in the slide.
To fit the ordinary double slide, consisting of two hinged parts opening book
fashion, to receive two films without carriers, the dividing plate which is usually of
metal, more or less flexible and provided on one or both sides with a spring or
springs, is replaced by a rigid dividing plate preferably of wood plane on both faces
and of such thickness that there is left between its face and the rebate of the frame
space sufficient only for the ordinary thickness of a film of the nature previously
described, that is to say, of one film on each side of the dividing plate.
This rigid dividing plate is preferably hinged along one of the sides of the frame
of the slide and may be secured in the frame also by a spring-catch.
In applying the invention to a single slide, that is to say, to one for holding one
film only, the back of the slide is provided with a suitable door having near its
edge grooves and ribs to engage with corresponding ribs and grooves in the frame
of the slide when the door is closed, in order that light may not then be admitted
through the back of the slide. The central interior surface of this door is plane
and projects sufficiently to afford space for a film between it and rebate of the
frame when the door is closed. This door may also be fastened by a bevelled
spring-bolt let in flush with the back of the door and having hinged to its end a
ring which will serve for drawing back the bolt and for opening the door.
Slides of this nature are shown in the annexed drawing, in which
Fig. 1 is the rear view of a single slide and Fig. 2 a section thereof on the
line 2-2;
Fig. 3 shows a double slide open and Fig. 4 is a section thereof on line 4-4 when
the slide is closed.
Fig. 5 is a section on line 5-5 Fig. 1 ; and
Fig. 6 is a section on line 6-6 Fig. 3.
A is the frame of the slide and B indicates the sliding door of the single slide, or
sliding doors of the double slide. These parts are of the construction usual in
wooden slides. In Figs. 1 and 2 C is the rear door hinged at D and having
grooves E to fit the corresponding bs on the frame A. The inner surface d of
the door C is raised so far that the film aforesaid may be held between the edges
of this surface of the door and the rebates of the frame while the film lies flatly
upon the surface d.
Fis a recess to hold the flat bolt G to the rear end of which
is attached the ing H. The plate J holds the bolt G in the recess F and the
plate K covers a recess in the frame A into which the bolt engages. L is a flat
spring lying in the recess L' and fixed in a slit cut in the wood of the door. It
engages in a slit Lm the bolt G. The bolt may be shouldered at G to abut
against the edge of plate J and it may be bevelled on its under side at G2 to be
pressed back by and pass the plate K when the door is closed.
In the double slide shown in Figs. 3 and 4, A, A¹ are the two parts of the frame
hinged at A and B, B₁ are the two sliding doors of the usual construction. The
door C¹ is of such thickness that on the one side it holds a film firmly against the
rebate of frame A and on the other side it holds another film firmly against
the rebate of frame A¹. The door is hinged at D¹ and is flat on both sides; it may
be secured in its place by a spring-catch consisting for instance of a flat spring M
attached to the frame A at its end M' and having in its other end M' a hole to
engage a pin N projecting from the edge of the door C¹. The end M' of the
spring may be widened and rounded back to permit the pin N to press back the
spring when the door is closed and to afford means for pressing back the spring by
hand when the door is to be opened.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is;-
1. The construction of the single slide with the door Chinged and provided with
a spring-lock as described, the surface d of said door being adapted to support a
film and hold same against the rebates of frame A.
2. The construction of the double slide with the interior door C³ flat on each
side and of such thickness as to support and hold a film on each side against the
rebates of the frames A and A¹ respectively.
3. The combination with the frames A, A¹, of a double slide, of the rigid
door Chinged to one of said frames and adapted to be secured by a spring-catch,
the door being of such thickness that films may be held in said double slide in the
manner described.
4. The construction of the cases, termed slides, with doors C or C¹ adapted in
the manner herein described to hold cut films without separate carriers.
Dated this 19th day of December 1895.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to the Applicant.