CHANGING SENSITIZED PLATES IN PHOTOGRAPHIC CAMERAS
Year: 1884

page_text: JAMES STURROCK Cashier Dundee Advertiser Office Dundee do hereby declare
the nature of my Invention for CHANGING SENSITIZED PLATES IN PHOTOGRAPHIC
CAMERAS, to be as follows:-
The first part of my Invention relates to cameras of the ordinary well known
kind in which pictures are obtained by exposure in the camera of glass plates
properly sensitized. It has for its object a novel method of constructing such
cameras so that the sensitized plates can be readily changed when required, I make
at the back of the camera a space to hold a sensitized plate this space is open
above and is provided with a flange or other device to which can be readily
attached by an elastic band or other convenient means the open mouth of a bag of
paper, cloth, india rubber, or other suitable flexible material, or it may be of tin,
card board or other rigid substance, with a flexible mouth of rubber or cloth
suitable for attachment to the camera, I fill the bag in a dark place with a
sensitized plate, and then close its neck at a suitable distance from the mouth
by means of a fold fastened with a spring clip or other equivalent device; I then
invert the bag and having fixed its mouth to the camera as already described,
I remove the spring clip or other fastening and deposit the sensitized plate in the
camera below, after exposure the plate is slipped from the camera into the bag
and the spring or other fastening again put on and the bag removed from the
camera when another bag containing a plate can be attached. The plates can be
stored in the bags both before and after exposure.
In the second part I make a separate holder or slide having a space to hold one
or two sensitized plates as in the ordinary dark slides, but having a flange or other
device to which the bag can be attached, and plate or plates put in as already
described, and which can be inserted in the camera in the usual way.
Dated this Fourteenth day of Merch 1984

page_text: I JAMES STURROCK, Bank Street, Dundee, in the County of Forfar North
Britain do hereby declare the nature of my Invention for CHANGING SENSITIZED
PLATES IN PHOTOGRAPHIC CAMERAS and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
The first part of my Invention relates to cameras of the ordinary well known
kind in which pictures are obtained by exposure in the camera of glass plates
properly sensitized. It has for its object a novel method of constructing such
cameras or slides for cameras, so that the sensitized plates can be more readily
changed when required. I make at the back of the cainera a space to hold a
sensitized plate. This space is open above, and is provided with a flange, or other
similar device, to which can be readily attached by an elastic band or other
convenient means, the open mouth of a bag made of paper, cloth, india-rubber,
or other suitable material impervious to light; or it may be made of tin, cardboard,
or other rigid substance, with a flexible neck or mouth of rubber or cloth suitable
for attachment to the camera. I fill the bag in a dark place with a sensitized
- plate, and then close or fold the mouth to exclude the light and secure it by a
spring, clip, elastic band, gum or their equivalents, and having fixed its mouth to
the camera, as already described, I remove, or undo the fastening, invert the bag,
and deposit the sensitized plate in the camera. After exposure, the plate is again
slipped from the camera into the bag, and the fastening again put on, and the bag,
with the plate, removed from the camera, when another bag containing a plate can
be attached. The plates can be stored away in the bags, botli before and after
exposure.
In the second part I make a seperate holder or slide, having a space to hold one
or two sensitized plates, as in the ordinary dark slides, but having a flange, or
other similar device, to which the bag can be attached, and a plate or plates put in,
as already described, and which can be inserted in the back of the camera in the
usual way.
In the accompanying Drawings Fig. 1 shows front view of bag.
Fig. 2 shows section of bag. Fig. 3 shows bag folded so as to exclude the light.
Fig. 4 shows bag attached to slide or camera. Fig. 5 shows bag raised ready for
plate to drop into camera or slide below. Fig. 6 shows section of paper bag folded.
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
First. The arrangement in cameras or slides for cameras for enabling flexible
bags to be attached substantially as described.
Second. Flexible bags for conveying plates to or from the camera or slide, made
so as to fold or close at the mouth, and secured by a spring, clip, elastic band, gum,
or their equivalents.
Third. Bags, by means of which, sensitized plates can be placed into, or taken
from, the camera, or slide, without introducing the hand or other agency into the
inside of the bag.
In witness whereof, I the said James Sturrock have hereunto set my hand and
séal' this Twenty nineth day of May, in the year of our Lord One thousand,
eight hundred and eighty four.