Year: 1886

page_text: Date of Application, 25th Mar., 1886.
Complete Left, 3rd Dec., 1886:
Complete Accepted, 18th Jan., 1887.
I JOSEPH DAVID WILLIAMS, of Station Road, Greenfield, Holywell, Flint, Portrait
Painter & Photographer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object an improvement in the cameras and appurtenances at
present in use, so as to enable the operator to focus and expose without withdrawing
any part of the slide proper from the camera, thus obviating one very fruitful source
of fogging.
The frame forming the end of the camera has a curved contour, where its rests on
the camera bottom so as the more easily to be adjusted. A slide in this frame is
formed in two parts, a ground glass for focussing, and a recess in which is placed a
slide or holder carrying the sensitive plate or paper.
A shutter slides laterally in grooves in the sensitive plate slide or holder. It has an
attachment at back, which engages with a cross bar or slide. The sensitive plate slide
is preferably formed double with two sliding shutters, one on each side. The slide
with its shutter (or shutters if a double plate carrier) is fixed in the recess in the
frame and prevented from falling out by movable catches. A stop is provided to
prevent the shutter or any part encroaching on the focussing glass. A spring or
other stop locks the slide in position. The slide carries the focussing glass and the
sensitive plate holder is supported in the frame between two feathers, and the entire.
frame is held in position in the camera by means of an ordinary sliding bracket. A
pin on the frame fits into a slot in the bracket. A door at the back of the camera.
provides for taking out the sensitive plate slide holder, with its shutter or shutters.-
This consists of a box with shutter for a lid and an opaque back to hold a single plate,
or two compartments, with an opaque dividing plate between, and two sliding shutters.
An opaque dividing piece is hinged between two frames. Two shutters or their
equivalent are required for this, one at each side. These are held to it by spring
clips or other mechanism, allowing the shutter to slide.
JOSEPH DAVID WILLIAMS.
Wm. P. Thompson & Co.,
6, Lord Street, Liverpool,
Agents.

page_text: Improvements in or relating to Photographic Cameras and Slides
or Appurtenances thereto.
I, JOSEPH DAVID WILLIAMS, of Station Road, Greenfield, Holywell, Flint, Portrait
Painter and Photographer, 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 has for its object an improvement in the cameras and appurtenances
at present in use, so as to enable the operator to focus and expose without withdrawing
any part of the slide proper from the camera, thus obviating one very fruitful source
of fogging.
The invention is best described by aid of the accompanying drawings, in which,
Figure 1 shows a back elevation of slide holding two plates,
Figure 3 front elevation of same, both unexposed and in position for focussing.
Figure 4 a front elevation of same parts as in Figure 3 but with the slide in position
for exposing, and
Figure 2 a sectional plan of slide, taken at x, x, Figure 1.
Figure 5 is a drawing of a subsidiary slide for paper negatives, and Figure 6 a
longitudinal Section of an ordinary bellows camera, with the improved slide attached.
Figures 7 to 10 show a few improvements in detail on my original experimental
slide Figure 7 being a transverse section through y-y Figure 9; Figure 8 back
elevation; Figure 9, plan partly in Section; and Figure 10 front elevation.
Like letters relate to like parts in all the figures.
In these A is the frame forming the end of the bellows in the camera, and formed
with a curved contour, where it rests on the camera bottom so as the more easily to be
adjusted. B, C slide in the main frame, one end B being provided with ground glass b
for focussing, and the other end C with recess in which is placed the subsidiary
slide or frame S, carrying the sensitive plate or plates such as the one for paper
negatives, set forth in Figure 5, and hereafter described, and the shutter or shutters D.
D is a shutter sliding laterally in grooves, in the subsidiary slide S. This shutter
has a projection, recess, or attachment T of any suitable form at back, by which it can be
grasped by the slide R sliding in the main frame A (or within the slide B, C, itself, as
in Figures 7 to 10), and attached to bar or handle E, which passes out through a light
tight hole in the side of the frame A. In the Figures 1 to 4 the projection T is
shown as a cross shaped piece placed near the centre of the shutter D, and engaging
with projections T on slide R, and in Figures 7 to 10 it is a thin piece of metal
secured to the end of D, and fitting into a groove T¹ at the end of R. Slide S with its
two shutters D, D, is placed in a recess or opening in Frame C, so as to be rigidly a
held by the latter laterally, while free to be pulled out in the direction parallel with
the axis of the camera, with its attachment T fitting into or between the projections
or into the groove T¹ on slide R. It is prevented from falling out of the frame C by
movable catches P, P, or other suitable device, such as a tongue and groove P¹ and
spring P, as shown in Figures 7-9. A stop is provided to prevent the shutter or rod E,

page_text: or its appurtenances going too far, so as to encroach on part B, with its ground
glass. Fis a spring or other stop for locking the slide in place, when in the position
set forth in Figure 4. The slide R may be of any suitable shape, but I prefer the one
shown in Figure 10.
The slide B, C slides between two feathers G G at each side, and the entire frame A
is held in position in the camera, while free for adjusting by means of an ordinary
bracket H, shown in dotted lines in Figure 6, and a binding screw h on frame A,
working in the slot in said bracket. I is a door at the back of the camera, for use in
taking out the subsidiary slide or negative holder S, with its shutter or shutters. This
slide S is composed of a box with shutter for a lid and an opaque back to hold a single
plate, or two compartments, with an opaque dividing plate between, and two sliding
shutters. Figure 5 shows a double subsidiary slide for use with paper negatives.
is the opaque, preferably black, dividing piece, K a front frame the mechanical
equivalent in the case of paper for the short sides forming the box, when glass
negatives are used. Two shutters or their equivalent are required for this, one at
each side. These are held to it by spring clips or other mechanism, allowing the shutter
to slide.
The mode of operation is as follows:-
The operator having placed a single or double subsidiary slide in place in the main
slide of the camera, focusses through glass b in frame B, the slide being in the position
shown in Figure 1, he then presses back bar E, till part C with the subsidiary slide
takes the place of part B, the stop F prevents the slide returning, and holds it in
position. He now exposes by drawing back shutter D, by means of E as shown in
dotted lines in Figure 4, and after exposure again returns the shutter. If a double
subsidiary slide S has been used, the catches P, P, if used, are undone, the slide S
lifted out and reversed, the two shutters being of course made interchangeable so as to
each equally fit the attachments or grooves T on slide R. The slide S being properly
secured, by withdrawing handle E with its shutter a second exposure is taken;
handle E is again returned, slide S taken out, and with its plates set aside for
developing at leisure.
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 :-
1st. A camera formed with a box A, having door I, and frames B, C, sliding in
grooves in same, substantially as, and for the purposes described.
2nd. The combination with a camera of a slide B, C, carrying both the focussing
glass, and the sensitive plate holder side by side enclosed in the camera, and so
arranged that the focussing glass and the sensitive plate holder can each in turn be
brought into position by moving the slide.
3rd. In combination with a camera, a slide carrying the sensitive plate holder, and
a shutter or shutters sliding on or over said sensitive plate holder, and worked from
outside by a pull handle or other mechanism, without any part of the sensitive plate
holder or shutter being exposed to the light, whereby the chance of fogging by
accidental admission of light is greatly lessened.
4th. The slide B, C with its appurtenances constructed and arranged substantially
as and for the purposes described.