Improvements in Photographic Cameras.
Year: 1886

page_text: Date of Application, 15th June, 1886.
Complete Left, 14th Mar., 1887.
Complete Accepted, 15th Apr., 1887.
PROVISIONAL SPECIFICATION.
Improvements in Photographic Cameras.
I SAMUEL DUNSEITH MCKELLEN 18 Brown Street Manchester Watch & Clock
& Camera Manufacturer do hereby declare the nature of this invention to be as
follows:-
My invention relates to the part of the photographic camera called the back and to
the method of attaching the dark slides thereto when exposing and is intended to
allow of the use of dark slides of various widths, without the necessity of having
special backs.
It is also intended to provide a method by which slides may be
inserted in a horizontal or vertical position without the use of a reversing frame.
In the first part of my invention instead of having the rails or guides or studs
(which carry the slides during exposure) fixed permanently to the camera back,
I make them so that they can be moved more apart from each other so as to allow a
wide slide to be inserted between them when required if studs are used they may be
made so that when turned in one direction they will take in the smaller slides & turned
in the other direction they shall take the larger one.
The second part of my invention has for its object the doing away with the reversing
frame in square cameras and yet to allow the dark slides to be inserted in either a
horizontal or vertical position at pleasure. This may be done by making the rails to
be removeable and placed either vertically or horizontally and fixed there by milled
set screws or any other suitable contrivance. Or by cutting away the middle part of
the rails and leaving only the corners so that the space cut away shall be equal to the
space between the rails so that the dark slide will slip between them in the space either
vertically or horizontally or instead of cutting the rails away, corners which are
rebatted underneath to admit the slide either way may be fixed to the camera so that
the slides will run between the corners in either direction.
Dated this 14th day of June 1886.

page_text: Improvements in Photographic Cameras.
I, SAMUEL DUNSEITH MCKELLEN of 18 Brown Street, Manchester, in the County
of Lancaster, Watch and Clock and Camera Manufacturer 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:
-
My invention relates to the part of a photographic camera, called the back, and the
method of attaching the dark slides thereto when exposing, and the object of my
invention is to allow of the use of dark slides of various widths, without the necessity
of having special backs. My invention is also intended to provide a method by
which dark slides may be inserted in the back of a photographic camera in a
horizontal or vertical position, without the use of a reversing frame:-In the first
part of my invention, in lieu of having the rails, guides, or studs, (which carry the
dark slides during exposure) fixed permanently to the camera back, I form the said
rails, guides or studs, so that they can be moved to a greater or less distance from
each other, in order to allow dark slides of different widths to be inserted between
them when required if studs are used they may be made so that when turned in
one direction they will take in the smaller slides and when turned in the opposite
direction they will take in the larger slides.-The second part of my invention has for
its object the doing away with the reversing frame in square cameras but allows the
dark slides to be inserted in either a horizontal or vertical position in the back of a
camera. This is effected by making the rails to be removeable or detachable so as to
place them either vertically or horizontally, and they are secured in the required
position by milled set screws or other suitable contrivance.
In order more clearly to describe my invention, I have annexed hereunto a sheet of
drawings. In the several views illustrated therein, similar letters refer to similar
parts.
Fig. 1 represents back of a photographic camera, and Fig. 2 edge view of the same.
In these views a is the camera back and 6 the rails or guides for holding the dark
slide e in position. The rails or guides bare formed with slotted holes c in which are
inserted set pins or screws d for holding said rails in position. These slotted holes.c
permit the rails to be placed more apart or nearer to cach other so as to allow a
wider or narrower slide to be inserted between them. They are represented placed
more apart in Fig. 3, the previous position of slides b being indicated by dotted
lines In this view the back a of the camera is shown without the dark slide e.
Fig. 4 represents back of a photographic camera with the moveable rails & formed
so that they may be placed either vertically or horizontally, by removing one of the
studs d and allowing one end of rail b to swivel so as to attain the required position, as
indicated by dotted lines 6' in Fig. 4 on drawing.
Fig. 5 represents studs d formed eccentrically and attached to back of camera so
that when said studs are turned or moved round, greater or less width may be left
between them in which to insert the dark slide.

page_text: In attaching rails or guides as berein above described to camera back, I do not
confine myself to the use of set screws or pins as other means may be employed when
preferred.
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-
1st. In a photographic camera, for the purpose of attaching the dark slide thereto,
the use of moveable rails or guides, which may be placed nearer to, or further apart
from each other, in order to allow dark slides of different widths to be inserted
between them.
2nd. For the purpose of attaching the dark slide to back of a photograph camera
either in a horizontal or vertical position, the use of removeable or detachable rails or
guides, which may be placed either horizontally or vertically as required.