Year: 1886

page_text: Date of Application, 9th Nov., 1886.
Complete Left, 9th Aug., 1887.
Complete Accepted, 16th Sept., 1887.
1, JOHN EDWARD THORNTON, of 3, New Lorne Street, Moss Side, Manchester, in
the County of Lancaster Printer, do hereby declare the nature of this invention to
be as follows:-
The object of this invention is for the purpose of dispensing with the necessity for
having a loose case for the reception of lens-diaphrams or stops, such as is usually
carried in the pocket.
In carrying out this invention I form a receptacle, which I call the diaphragm-
holder, which may be a plate having its edges turned over on three sides to hold the
diaphragmns in position, leaving the top open so that the diaphragms may be readily
withdrawn. A spring, having a projection attached, is made to press against tho
diaphragms, and the projection, passing through the holes therein prevents them being
withdrawn till the spring and projection are pressed out of the way.
The holder may be made of metal, ebonite, or other suitable material, and may be
attached to any part of the camera in a convenient position. In some cases I prefer
to place it on the camera front near the lens, but generally I prefer to place it on the
side of camera body.
If desired, the holder may be formed in the woodwork, by recessing or cutting it
out, or in any other way which may be preferred.

page_text: I, JOHN EDWARD THORNTON of 3 New Lorne Street, Moss Side, Manchester in
the County of Lancaster Printer 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 is for the purpose of dispensing with the necessity of having a loose
case for the reception of lens diaphrains or stops which are required for use in
connection with a photographic camera, or a case such as is usually carried in the
pocket. In the annexed drawings Fig. 1. represents front view and Fig. 2. side view
of a diaphram holder for attaching or fixing to any part of a photographic camera:
In these views a is the body or other part of camera, b is the diaphram holder attached
by screws c to any convenient part of camera: the diaphrams represented by dotted
lines e are retained by the wings of formed on diaphram holder 6: the spring 9 which
is attached at / to inside or outside if preferred of camera is formed with a pin j
which projects through camera frame and retains the diaphrams in the holder : when
any diaphram is required to be taken from holder the spring g is pressed inwards as
represented by dotted lines on drawing, by means of the stud k which causes the
pinj to be withdrawn from diaphram and said diaphram can then be lifted out. When
pressure is removed from stud k the spring g and pin ; return to their original
positions. The holder may be constructed of metal, ebonite, or other suitable
material.
If preferred the holder may be formed in the woodwork of camera by recessing
or cutting it out, with the spring 9 attached as herein before described.
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
In a photographic camera the use of a fixed holder or receptacle for lens diaphrams
or stops which are required for use in a photographic camera, said holder being
either of the form shown on annexed drawing, or other suitable construction and
attached to any part of a photographic camera, or forming part thereof substantially
as herein before described.