Improvements in and connected with Photographic Cameras.
Year: 1899

page_text: Date of Application, 26th Jan., 1899-Accepted, 22nd Apr., 1899
COMPLETE SPECIFICATION.
Improvements in and connected with Photographic Cameras.
EDWARD ALAND, 238, Albert Road, Peckham, London, S.E., Stationer, etc.,
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 camera is made to carry six or twelve plates in separate carriers as
pattern A, Fig. 1 they are placed in at the back of camera and pressed forward
by springs to the front.
The carrier is made longer than the plate itself, a strip of wood is placed at
the top of the carrier and the tin is turned over and fastened down by steel
fasteners, the plates are placed in the carrier from the side. Half the number
of carriers have a piece cut out of the top an of an inch wide and 1½ inches
from the left hand side 1A, Fig. 1, and the other half 1½ inches from the right
hand side 2 A, Fig. 1. They are placed in the camera alternately, first one of
No. 1A, then one of No. 2 A, so that one of the two catches B,1, Fig. 4,
and B, 2, Fig. 4, shall pass through the space cut out of the top of the carrier A
or 2 A, Fig. 1, and the other hold the carrier back until released by the double
wedge C, Fig. 5. Each of the carriers are numbered from 1 to 12. The double
wedge C, Fig. 5, is moved backwards and forwards by the knob C.1, Fig. 3, so
that each time it is moved either to the right or left hand side of the camera
one of the wedges of the double wedge C, Fig. 5, will pass under one of the
catches B, 1, or B, 2, Fig. 4, and raise it, allowing the carrier with plate to drop
into the well D, Fig. 2, at the bottom of camera. The well D, Fig. 2, is opened
by pulling the sliding rod E, Fig. 4, at the back of the camera, this pulls the
cloth and wood slide F, Fig. 4, and opens the well. The wood portion G, of
the slide F, Fig. 4, goes underneath the unexposed plates and the cloth portion
of the slide F, folds up into a part of the well H, Fig. 2. Fixed to the. front
of the wood portion G, of the slide F, is a strip of metal J, Fig. 4, the end of it
is narrower and passes through the grooving K, Fig. 2, cut into the parti-
tion L. Fig. 4 so that it will work the levers M, and N, Fig. 2. The levers M,
and N, are working in a separate partition a quarter of an inch wide. At the
top of lever M, Fig. 2, a piece of cat gut P, is fastened, this passes through the
camera to an inside shutter 0, Fig. 2 this shutter is kept continually over the
lens hole by a spring pulling it.
When the slide F, Fig. 4, is closed up it pushes lever M, Fig. 2 and pulls
shutter O, Fig. 2, away from the lens hole leaving it open. Lever M, Fig. 2,
is kept in position by spring Q, Fig. 2 when the slide 1, Fig. 4, is opened for
changing a plate it releases lever M, Fig. 2, and allows the spring shutter O, Fig. 2
to close the lens hole, the slide F, Fig. 4 being drawn further along, the end
of catch piece J, Fig. 2 catches against the lever N, Fig. 2, and draws that
downwards.
At the top end of lever N, Fig. 2 is also a piece of cat gut R, this passes along
the partition L, Fig. 2 to the top into the shutter portion of the camera run-

page_text: ning through pulley S, Fig. 2 and is attached to the drop shutter T, Fig. 2
this shutter is kept down and closed by the elastic band U, Fig. 2 this is
attached to the cog wheel V, Fig. 2, and by turning the cog wheel V, the elastic
band is stretched and the speed of the shutter T, is increased.
A spring Z, Fig. 4 catches the shutter T, when it is reset and when the
kuob X, Fig. 4 is pressed it releases the pressure of the spring Z, Fig. 4 and
allows the shutter T, to drop; when the slide F, Fig. 4 is pulled wide open the
end of the catch piece J, Fig. 4 has pulled the lever N, Fig. 2 right down, this
in its turn pulls the cat gut R, Fig. 2 which resets the shutter T, by pulling
it up.
In closing the slide F, Fig. 4 the lever N, Fig. 2 is brought back to its place
by the spring W, Fig. 2 and the catch piece J, Fig. 2 passing along the
groove K, Fig. 2. pushes lever M, Fig. 2 and pulls the inner shutter 0, Fig. 2
away from the lens hole and keeps it away until the slide F, Fig. 4 is again
opened.
The
The object of the inner shutter O, Fig. 2 is to prevent the light getting at
the plates while the drop shutter T, Fig. 2 is being reset by the lever N, Fig. 2.
The camera has two view finders, and the exposed plates are registered by the
movement of spring b, Fig. 2 on lever M, Fig. 2, and the cog wheel a.
number of the plates are on the dial attached to cog wheel a, Fig. 2 and a small
hole is cut in the side of the camera. The cog wheel a, Fig. 2 being turned
round by the movement of spring b, Fig. 2 on lever M, Fig. 2 shows the number
of exposed plates through this hole.
DISCLAIMERS.
I know that in many cameras the plates are made to drop from the back
of the camera to the bottom; and that the drop shutters have been used for
some time, I also know that carriers are used for carrying the plates; and I do
not claim any of these as being inventions of mine.
Having now particularly described the nature of my invention and in what
manner the same is to be performed, I declare that what I claim is
1. The mechanical arrangements for changing. the plates, as described a
drawn.
1
and
2. The arrangement for covering the lens hole with the inner shutter 0, Fig. 2
by the gut string and lever movement while the drop shutter is being reset.
3. The wood and cloth slide, and rod for moving the levers and closing the
well.
4. The two lever arrangements at the side of the camera for resetting the
shutter, registering the exposures and covering up the lens hole.
Dated this 25th day of January 1899