Improvements in or appertaining to Photographic Cameras.
Year: 1891

page_text: Date of Application, 3rd Mar., 1891
Complete Specification Left, 3rd Dec., 1891-Accepted, 16th Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in or appertaining to Photographic Cameras.
I THOMAS EDWARD CORNEY WILSON of 28 Rufford Road, Fairfield in the
County of Lancaster Cotton Salesman do hereby declare the nature of this
invention to be as follows:-
In detective cameras at the present time, where the plates fall out of the field of
view the camera has to be nearly double the depth that would otherwise be
necessary in order to supply the box into which the plates fall; & where the plates
fall vertically, exactly double the depth is required. Now my invention is designed
to enable the plates to fall vertically & yet only to require very little additional
depth. I place all the plates immediately behind the frame or obstruction, which
regulates the distance from the object lens so that as each in succession come
against this frame, they are in the field & are ready for a photograph being taken.
Behind the plates I place a dummy plate pressed against them by a spring &
attached to this dummy plate a string passing through the camera back. At the
bottom of the camera proper I arrange the slide which being drawn back leaves a
hiatus immediately below the plates just wide enough for one plate to fall through;
the plate cannot however fall if pressed tight against the frame by means of the
spring. Immediately under the body of the camera hinge a box, this box is
ordinarily held tight up against the camera bottom. Light is prevented from
passing through the slot in the bottom which is just clear of this box by a curtain
of black cloth which is fastened to the camera bottom beyond the slot & to the box.
The catch being withdrawn this second box hangs vertically & in this case a slit in
this box comes immediately below the slit in the camera. Consequently, the slide
having already been withdrawn whenever the string is pulled, the nearest plate
falls at once into this box. The box then being pressed back into its original
position, the plate falls to the bottom of the box; namely, to the side of the box
when vertical farthest away from the slit. The result is that if the box & the
plate holding box each hold a set of twenty plates, each of these twenty plates in
succession can be exposed, and allowed to fall into the receiving box.
Dated this 2nd day of March 1891.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or appertaining to Photographic Cameras.
I, THOMAS EDWARD CORNEY WILSON of 28 Rufford Road, Fairfield in the
County of Lancaster Cotton Salesman, 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: -
In detective cameras at the present time, where the plates fall out of the field of
view, the camera has to be nearly double the depth that would otherwise be
necessary in order to supply the box into which the plates fall, and where the
plates fall vertically exactly double the depth is required.
Now my invention is designed to enable the plates to fall vertically and yet only
to require the camera to have very little additional depth.
The invention is best described by aid of the accompanying drawings, in which,
Figure 1 is a side clevation partly in section.

page_text: Figure 2 is a side elevation partly in section, shewing the apparatus in a position
to receive the plates after exposure as they fall.
Figure 3 is a plan partly in section; and
Figure 4 a section on the line A B of Figure 1.
Referring to these figures, C are holders for the sensitised plates, C' the box for
holding the plate holders. The former are of any suitable form, and may be
provided with lips at the sides and bottom to hold the plates therein. I place all
these plate holders immediately behind the frame or obstruction D which regulates
the distance from the object lens so that, as cach in succession comes against the
frame D, they are in the field and are ready for a photograph being taken. Behind.
the plates or plate holders C, I place a dummy plate B pressed against them by a
spring and attached to this dummy plate a string e passing through the camera
back. At the bottom of the camera proper, I arrange the slide F, which, being
drawn back, leares a hiatus immediately below the plates just wide enough for
one plate holder to fall through; the plate holder cannot however fall if pressed
tight against the frame D by means of the spring. Immediately under the body of
the camera, I hinge a box H, this box is ordinarily held tight up against or in
proximity to the camera bottom. Light is prevented from passing through the slot
in the bottom which is just clear of this box by a curtain of black cloth which is
fastened to the camera bottom beyond the slot and to the box, or by the hinge I
which covers the slot when the box is turned into the position shown in Figure 1,
but which uncovers it when turned into the position shown in Figure 2.
The catch being withdrawn, the hinged box H hangs vertically, and in this
position a slit in the box comes immediately below the hiatus G in the camera,
consequently the slide F having already been withdrawn by the thumbpiece under
the camera proper, the nearest plate falls at once into the box H, on being released
by pulling the string e. The box then being pressed back into its original position,
the plate falls to the bottom of the box, namely to the side of the box when vertical
furthest away from the slit, the result is that, if the box H and the plate holding
box C each hold a set of twenty plates, each of these twenty plates in succession
can be exposed and allowed to fall into the receiving box H. To fill the plate
holding box C', dummy plate E is drawn back by the string e, the plates being
withdrawn from box H by opening light tight lid fixed in the bottom of same.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is―
1. The improvement in-detective cameras or the like, which consists in hanging
immediately under the camera proper a box which is ordinarily folded or held tight
up against the camera bottom but which when released is adapted to hang down
vertically and receive through suitable openings the sensitised plates as they fall
out of the field of view.
2. In a detective camera, the combination therewith of a box H, the hinge I for
hinging the box to the camera bottom and the slots G and h, the said hinge being
adapted to cover the slots when the box is folded against the bottom of the camera,
but to uncover them when turned to hang down vertically, substantially as
described.
is way of December
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Nottingham, and London; Patent Agents.