Combined Reducing and Enlarging Camera for Making Lantern Slides.
Year: 1896

page_text: Date of Application, 20th July, 1896
Complete Specification Left, 21st Nov., 1896-Accepted, 13th Mar., 1897
PROVISIONAL SPECIFICATION.
Combined Reducing and Enlarging Camera for Making
Lantern Slides.
ROLAND DUNN SMITH Maitland House Lower Clapton N.E. Surgeon do
hereby declare the nature of this invention to be as follows:-
Reducing camera for making lantern slides from any sized negative, or from any
sized portion of any sized negative also an enlarging camera for making lantern
slides from smaller negatives.
This is effected by means of a mechanical stage which carries the negative with
it, so that any portion of it can be brought into the optic axis of the lens.
This enlarging camera consists of (1) a baseboard at one end of which is fixed.
the runners for the camera proper and at the other end the frame and stage for the
negative plate which is to be reduced or enlarged; (2) the camera proper containing
the dark slide which holds the lantern plate, the lens and shutter; (3) the frame
with adapters for various sized negative plates and an adjustable stage for holding
these plates against the adapters in any position.
(1) The baseboard is provided with runners fixed lengthwise on which the
camera proper slide actuated by the ordinary rack and pinion movement, and these
runners are provided with graduated scales on which pointers fixed to the camera
proper slides on one side the scale and pointer being graduated for reducing
various sizes from (say) whole plate 8" x 6" to lantern size 31" x 34" and on the
other side for enlarging from any smaller sized negative to lantern size.
These scales and pointers are so arranged as to indicate the correct distance of
the lens from the negative plate. At the other end of the baseboard the frame and
stage for holding the negative plate are fixed at right angles to the runners.
(2) The camera proper consists of an ordinary box camera provided with a dark
slide to hold the sensitive lantern plate (from which the lantern slide is made) at
the end of the camera opposite the frame. Inside the camera is a suitable lens
fixed in a sliding light tight partition and provided with a pointer which slides on
a graduated scale fixed on top of the camera proper. This pointer and scale are
so made as to be reversible for enlarging or reducing and to indicate the correct
distance of the lens from the sensitive lantern plate. A shutter is provided in
the camera at the end opposite the dark slide to shut off the light as required.
(3) The frame and stage are supported by the baseboard, and consist of an oblong
frame of two sides, top and bottom-the opening (about 8" x 6" for whole plate)
facing the camera proper-and on the side opposite the camera this frame is
rebated to take the largest plate (say whole plate size) or ordinary adapters for
balf plate, quarter plate or such other sizes as desired. The stage consists of a
rebated bar placed on the outside of the frame on the side farthest from the lens
and is held to the frame by two slotted guides sliding on the sides of the frame
which are held in position by thumb screws or other convenient fastening. These
guides have each a horizontal slot to take projecting pins on the rebated bar so as
o allow the pins to revolve in the slots when one guide is raised higher than the
other and the negative plate is tilted and also to allow these pins side play in the
lirection of the length of the bar.
The rebated bar is held against the frame and the adapters by the gui les an.l

page_text: is furnished with two curved springs which reach over any of the adapters and
holds the negative plates against them and also hold the adapters in place. The
lower edge of the negative plate is placed in the rebate of the bar which is open
at the ends so that the negative plate may be moved along the bar as required-
the plate being raised, lowered or tilted by the movement of the bar and slotted
guides which are then clamped fast as required.
Dated this Auh dan of Iul.. 1906
ROLAND SMITH,
Maitland House, Lower Clapton.
Combined Reducing and Enlarging Camera for Making
Lantern Slides.
ROLAND DUNN SMITH Maitland House Lower Clapton N.E. Surgeon, 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:-
Reducing camera for making lantern slides from any sized negative, or from
any sized portion of any sized negative, also as an enlarging camera for making
lantern slides from smaller negatives.
This is effected by means of a mechanical stage which carries the negative
with it, so that any portion of it can be brought into the optic axis of the lens-
as follows:-(See Fig. 1.)
This camera consists of (1st) a baseboard (B) at one end of which is fixed the
runners (RR) for the camera proper (C) and at the other end the frame (F) and
stage (S) for the negative plate which is to be reduced or enlarged. (2nd) the
camera proper (C) containing the dark slide (D) which holds the lantern plate,
the lens (L) and a shutter (T)-(3rd) the frame (F) with adapters (A A) for
various sized negatives and an adjustable stage (S) for holding these plates against
the adapters in any position. (See Fig. 1.)
(1st) The baseboard (B) is provided with runners (RR) fixed lengthwise on
which the camera proper (C) slides actuated by the ordinary rack & pinion (P)
and these runners are provided with graduated scales (XX) on which pointers (QQ)
fixed to the camera proper slide, on one side the scale & pointer being graduated for
reducing various sizes from say whole-plate (8" x 6") to lantern size (31" x 31")
and on the other side for enlarging from any smaller sized negative to lantern size.
These pointers and scales are so arranged as to indicate the correct distance of
the lens (L) from the negative plate. At the other end of the baseboard (B) the
frame (F) and stage (S) for holding the negative plate are fixed at right angles
to the runners (R). (See Fig. 1.)
(2nd) The camera proper (C) consists of an ordinary box camera provided with
a dark slide (D) to hold the sensitive lantern plate from which the lantern slide
is made at the end of the camera (C) opposite the frame (F).
Inside the camera (C) is a suitable leus (L) (Fig. 5) fixed in a sliding light-
tight partition and provided with a pointer (M) (Fig. 4 & 5) which slides on
a graduated scale N (Figs. 4 & 5) fixed on top of the camera proper. On the
underside of the pointer M a projecting pin passes through a slot in the camera
and engages with the light-tight partition holding the lens. A thumb screw W
passes through the pointer and clamps the lens in position.
One of the graduated scales N is marked showing the distances of the lens from
the dark slide when reducing.

page_text: For enlarging, the screw W is removed, the pointer M is reversed end for end-
the lens is pushed forwards towards the frame F (Fig. 1.) and the pointer replaced,
but now pointing over the second scale N N (Fig. 4.) for enlarging.
A shutter T (Fig. 1) is provided in the camera at the end opposite the dark
slide to shut off the light as required.
(3rd) The frame F (Figs. 2 & 3) and stage S are supported by the baseboard B
and consist of an oblong frame of 2 sides top & bottom-the opening (about
8" x 6" for whole plate size) facing the camera proper C (Fig. 1., and on the
side opposite the camera C this frame F is rebated to take the largest plate or
ordinary adapters A A (Fig. 1.) for half-plate, quarter plate or such other sizes
as desired.
The stage S (Figs. 2 & 4) consists of a rebated bar placed on the outside of the
frame on the side farthest from the lens L (Fig. 1.) and is held to the frame F
by 2 slotted guides G (Figs. 2 & 3) sliding on the sides of the frame which are
held in position by thumb screws.
These guides G (Figs. 2 & 3.) have each a horizontal slot to take projecting
pins Z on the rebated bar so as to allow the pins Z to revolve in the slots when one
guide is raised higher than the other and the negative plate tilted and also to
allow these pins Z (Figs. 2 & 3) side play in the direction of the length of the bar.
The rebated bar S is held against the frame and the adapters by the guides G
and is furnished with 2 curved springs U U which reach over any of the adapters
and hold the negative plate against them and also hold the adapters in place.
The lower edge of the negative plate is placed in the rebate of the bar S which is
open at the ends so that the negative plate may be moved along the bar as required-
the plate being raised, lowered or tilted by the movement of the bar S and guides G.
which are then clamped fast as required.
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 mechanical stage (S) with its two guides (G) to raise or lower the
stage.
(2) The slotting of these guides G and attachment to the bar to enable the
stage to be tilted.
(3) The springs which hold both negative and adapters in position U.
(4) The scales and pointers and particularly the reversible pointer M.
(5) The arrangement of the parts as above specified to make a reducing and
enlarging camera for lantern slide making.
Dated this 21st day of February 1897.
ROLAND D. SMITH..