Improvements in Photographic Plate Changing Boxes or Magazines.
Year: 1897

page_text: Improvements in Photographic Plate Changing Boxes or Magazines.
I, ARTHUR EDWARD BRYANT CAYZER, of Ralston, near Paisley, in the County
of Renfrew, North Britain, Clerk, do hereby declare the nature of this invention
to be as follows, that is to say:-
My said invention has for its object to facilitate the changing of photographic
plates in connection with a camera.
My invention consists in providing a box or magazine to contain any convenient
number of plates, such box having combined with it a plate holder adapted to
receive a plate from the box to be subjected to exposure in the camera and to be
afterwards returned to the box, the parts being all contrived and arranged so as
to prevent the plate from being acted on by any improper light. The box is sup-
plied with prepared glass plates in a dark room, and these are transferred one by
one from the bottom of the pile through a slit in the side of the box. The plate
holder is adapted to be applied at the slit to receive a plate, being arranged to
slide into position in light-tight guides. The slit of the box and a corresponding
slit in the side of the plate holder are provided with light-tight sliding covers,
which may be drawn out together when a plate is to be transferred from the box
to the plate holder, the transference being effected by holding the box and plate
holder with the plate in a vertical or inclined position the plate then dropping
into the holder. The sliding covers are preferably hinged to allow of their being
conveniently turned across the end of the box when drawn out, without being
completely removed from their guides.
The plate holder is made with sliding light-tight covers on both of its sides
which are parallel to the plate, one of these covers being withdrawn to expose the
plate when in the camera, the plate holder and camera being adapted to each
other as usual with plate holders and cameras. The opening in the plate which is
uncovered for exposure is slightly less than the plate so that the plate cannot fall
into the camera. The other sliding cover of the plate holder uncovers an opening
large enough for the plate to pass through it; and after an exposure the exposure
slide having been closed, the plate holder is transferred to the top of the box or
magazine which is adapted to receive it by sliding in light-tight guides. The
box is provided with a sliding cover, and when the plate holder with the exposed
plate has been arranged on the top of the box, the covers of the. plate holder and
of the box are withdrawn, and the plate drops into the box.
D
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1007

page_text: I, ARTHUR EDWARD BRYANT CAYZER, of Ralston, near Paisley, in the County
of Renfrew, North Britain, Clerk, 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, that is to say:-
My said invention has for its object to facilitate the changing of photographic
plates in connection with a camera.
My invention consists in providing a box or magazine to contain any convenient
number of plates, such box having combined with it a plate holder adapted to
receive a plate from the box to be subjected to exposure in the camera and to be
afterwards returned to the box, the parts being all contrived and arranged so as
to prevent the plate from being acted on by any improper light.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings
to be hereinafter referred to in describing my improvements.
Figure, 1, on the accompanying sheet of drawings is a vertical section of the
box or magazine for containing the plates; Figure, 2, being a similar view of
the plate holder. Figures, 3, and 4, are perspective views showing the box with
the plate holder in different positions. In these drawings the same reference
letters are used to mark the same or like parts wherever they are repeated.
As shown in the drawings there is provided a box or magazine, A, to contain
any convenient number of prepared glass plates (indicated by dotted lines) the
box being supplied with these plates in a dark room. The plates are transferred
one by one from the bottom of the pile in the box, A, through a slit, B, in the
side of the box, to a plate holder, C, adapted to be applied at the slit, B, to receive
a plate, as shown in Figure, 3, the plate holder being arranged to slide into this
position in light-tight guides, D. The slit, B, of the box, A, and a corresponding
slit in the side of the plate holder, C, are provided with light-tight sliding
covers, E, F, which are both drawn out when a plate is to be transferred from the
box, A, to the plate holder, C, the transference being effected by holding the box
and plate holder with the plate in a vertical or inclined position the plate then
dropping into the holder. Before drawing out the sliding covers, E, F, a small
catch, G, attached to the box, A, may be turned down across the end of the plate
holder, C, to keep it in position; and the sliding covers may be hinged to allow
of their being conveniently turned across the end of the box when drawn out,
without being completely removed from their guides. When the plate has been
transferred to the plate holder, C, as described the sliding covers, E, F, are pushed
in again and the catch, G, turned back into the position shown in Figures, 3
and 4, and the holder, C, can then be removed from the guides, D, and transferred
to the camera.
The plate holder, C, is made with sliding light-tight covers, H, J, on both of
its sides, which are parallel to the plate, one, H, of these covers being withdrawn
to expose the plate when in the camera, the plate holder, C, and camera being
adapted to each other as usual with plate holders and cameras. The opening in
the plate holder, C, which is uncovered for exposure of the plate is slightly less
than the plate so that the plate cannot fall into the camera.
The other sliding
cover, J, of the plate holder, C, uncovers an opening large enough for the plate
to pass through it; and after an exposure the exposure slide, H, having been
closed, the plate holder, C, is transferred to the top of the box or magazine, A,
which is adapted to receive it by sliding in light-tight guides, K. Figure, 4,

page_text: shows the plate holder, C, as being partly in position on the top of the box, A, as
described. The box, A, is provided with a sliding cover, L, and when the plate
holder, C, with the exposed plate has been arranged on the top of the box, A,
the cover, J, of the plate holder and the cover, L, of the box are withdrawn and
the plate drops into the box. The covers, J, L, are then pushed in again and when
it is desired to transfer another plate to the plate holder it is withdrawn from the
top of the box and placed in the position shown in Figure, 3, as hereinbefore
described.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what
I claim is:-
The improved photographic plate changing box or magazine for containing any
convenient number of plates, such box having combined with it a plate holder
adapted to receive a plate from the bottom of the box to be subjected to exposure
in the camera and to be afterwards returned to the top of the box, the parts being
all contrived and arranged substantially as herein before described and shown on
the accompanying drawings.
Dated this Twenty-fifth day of February 1898.