An Improved Plate Holding or Plate Changing Device for Photographio Cameras.
Year: 1896

page_text: Date of Application, 8th Feb., 1896-Accepted, 4th Apr., 1896
COMPLETE SPECIFICATION.
An Improved Plate Holding or Plate Changing Device for
Photographio Cameras.
DORR RALPH CLOSE, both of
No. 163 State Street, City of Chicago, County of Cook, and State of Illinois,
United States of America, Dealers in Photographic Supplies, 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 that class of photographic plate holders for use in
portable cameras, in which a series of negative plates are supported so as to be
capable of successive exposure.
We, EDWARD GARDNER CONE and
And the present improvement has for its object to provide a simple and efficient
arrangement and construction of parts whereby the series of four independent plate
holders of the present improvement are adapted for ready and convenient manipula-
tion from a covered or closed position, to one of exposure, and then back again to a
covered or closed position, in a consecutive manner, as will hereinafter more fully
appear and be more particularly pointed out in the claims.
We attain such object by the arrangement of parts illustrated in the
accompanying drawings, in which:
Figure 1, is a longitudinal section of the improved plate holder in position in the
rear of the camera box.
Figure 2, a side elevation of the same, with the walls of the camera box in
section.
Figure 3, an end elevation of the present improved plate holder.
Figure 4, a detail section of a modification.
Similar numerals of reference indicate like parts in the several views.
Referring to the drawings 1, represents the rear portion of a camera box, made
open ended so as to receive the body portion of the plate holder by which it is
closed.
2, represents the hody portion of the plate holder of a square formation fitting
the end of the camera box, and having a marginal flange 3, by which its proper
relative position, as well as of the plate holders proper, are assured with relation to
the lens of the camera.
4, are plate holders proper, four in number, and each provided with marginal
side flanges 5, 5, and with end flanges 6 and 7, that overhang in the form of lips so
as to constitute holding pockets for the upper and lower ends of the photographic
negative plate. Within the lower pocket is arranged the usual spring 8, against
which the negative plate rests, in a yielding manner, so that the negative plate can
be pushed down in such pocket a sufficient distance to admit of the opposite end of
the negative plate, being introduced into the upper pocket after which the spring
by its resiliency holds the plate in proper position within the upper and lower
pockets.
9, is a finger notch in the upper flange for convenience in removing the photo-
graphic plate from the holder.
10, is a spring upon the forward face of the holder, for the purpose of forcing
the photographic negative plate outward.against the holding lips of the flanges 6
and 7, so as to insure a firm holding of such plate in proper position.
The flanges 5, 5, and 6 and 7, are on a common plane so that they will in the
covered or closed condition of the plate holder, lay closely against the inner wall,
of the camera box, so as to exclude all light from the contained photographic
negative plate.
:
'

page_text: Each of the series of plate holders 4, are hinged at the respective edges of the
square supporting base or body portion 2, by hinge lugs 11, and rods 12, that are
fixed to the plate holders 4, and which have one of their ends 13, squared or non-
circular, so as to receive a suitable hand key, and be capable of manipulation by
hand so as to turn the plate holder from its covered position, to a position of
exposure, and vice versa.
The camera box will have openings 14, registering with the squared ends 13, so
as to admit of the introduction of the operating hand key heretofore described.
15, is a laterally projecting lug on the bottom of each plate holder, that is
adapted to bear against a spring 16, secured to the base 2, the action of which is to
hold the plate holder in either of its two positions in a firm manner, that is
however capable of yielding to the force exerted by the operator, in changing the
position of the plate.
It is within the province of our invention to hinge the plate holders directly to
the walls of the camera, in manner shown in Figure 4, in cases where the detach-
able nature of the holder is not desired.
In such case the back of the camera, will be in the form of a-detachable lid to
permit access of the plate holders.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A photographic plate holder for cameras, comprising a suitable supporting
base, and a series of plate holders hinged thereto, in positions immediately adjacent
to the walls of the camera, so as to normally occupy a longitudinal position in the
camera, in contact with and protected from the light, by the walls thereof, each
plate holder being adapted to swing back serially into a transverse focal position
common to the series of plate holders, substantially as set forth.
2. A photographic plate holder for cameras, comprising a suitable supporting
base, and a series of plate holders hinged thereto, in positions immediately adjacent
to the walls of the camera, so as to normally occupy a longitudinal position in the
camera in contact with and protected from the light, by the walls thereof, each
plate holder being adapted to swing back serially into transverse focal position
common to the series of plate holders, and means for holding such plates in either
position, the same consisting of lateral lugs, 15, on the plate holders, and springs 16,
on the supporting base, substantially as set forth.
3. A photographic plate holder comprising a supporting base, and a series of
plate holders hinged to the outer edges of the same, by means of pivot lugs, and
pivot rods that are fixed to the plate holders and provided with non-circular
operating ends, substantially as set forth.
4. A photographic plate holder for cameras, comprising a suitable supporting
base, and a series of plate holders hinged thereto, in positions immediately adjacent
to the walls of the camera, so as to normally occupy a longitudinal position in the
camera in contact with, and protected from the light, by the walls thereof, each
plate holder being adapted to swing back serially into transverse focal position
common to the series of plate holders, such plate holders being provided with
marginal side flanges 5, 5, and top and bottom holding flanges 6 and 7, the top of
such flanges being arranged on a common plane, so as to present a plane surface,
adapted to fit closely, against the camera wall, when the plate holders are in their
non-exposed position, substantially as set forth.
HERBERT HADDAN & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicants.