An Improved Changing Box or Apparatus for Storing, Carrying, Exposing, and Changing Actinically Sensitive Films on Glass, on Paper, or on other Material to be Employed in Obtaining Photographic Impressions in the Camera. Box FORING CARRYING EXPOSING AND CHANGING ACTINICALLY SENSITIVE FILMS ON GLASS, ON PAPER OR ON OTHER MATERIAL TO BE EMPLOYED IN OBTAINING PHOTOGRAPHIC IMPRESSIONS IN THE CAMERA
Year: 1886

page_text: An Improved Changing Box or Apparatus for Storing, Carrying,
Exposing, and Changing Actinically Sensitive Films on Glass,
on Paper, or on other Material to be Employed in Obtaining
Photographic Impressions in the Camera.
I GEORGE CALDWELL of number One hundred and eighty seven West Princes Street
Glasgow in the County of Lanark Cabinet maker do hereby declare the nature of said
Invention for AN IMPROVED CHANGING Box OR APPARATUS FOR STORING CARRYING
EXPOSING AND CHANGING ACTINICALLY SENSITIVE FILMS ON GLASS, ON PAPER OR
ON OTHER MATERIAL TO BE EMPLOYED IN OBTAINING PHOTOGRAPHIC IMPRESSIONS
IN THE CAMERA to be as follows:-
:-
This apparatus consists of (A) a Box containing any desired number of (B) Plate
or Film frames or holders which are kept in position in the box (A) and the film
protected from light by an arrangement of springs within the Box, and are inter-
changeable and removeable at pleasure for use in the Camera or other purposes by
means of (C) the Shutter which is detached, but which when in combination with the
plate or film frames or holders (B) forms a complete dark slide or carrier, protecting
the film from, and during, the time the frame or holder is withdrawn from the box and
thus affording the usual facilities for exposure in the Camera.
This Shutter (C) is provided with a spring catch or lock to attach it to & detach it
from, the plate or film frames or holders (B) at pleasure. These frames or Holders (B)
are faced with velvet plush or other suitable material and are so constructed as to hold
plates or films of any size smaller than their normal size and are fitted with an eye or
socket to receive the spring catch or lock of the shutter (C) and with interior catches
and spring to maintain the sensitive plate or film in position. The various parts of the
apparatus may be constructed of wood, metal vulcanite or other suitable material or
partly of one and parily of another.
Dated this Fifteenth day of June 1886

page_text: An Improved Changing Box or Apparatus for Storing, Carrying,
Exposing, and Changing Actinically Sensitive Films on Glass,
on Paper, or on other Material to be Employed in Obtaining
Photographic Impressions in the Camera.
I GEORGE CALDWELL of 187 West Princes Street, Glasgow 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 relates to improvements in apparatus for storing carrying exposing
and changing actinically sensitive films on glass, paper or other suitable material
employed in obtaining photographic impressions in the camera.
This apparatus consists of a Box containing any desiréd number of plate or film
frames or holders which are kept in position protecting the film from light by a
protector or moveable partition and an arrangement of springs within the box which
frames are interchangeable and removeable at pleasure for use in the camera by
means of a shutter which is detached but which forms in combination with the plate
or film frames or holders a complete dark slide protecting the sensitive film from light
when withdrawn from the. box thus affording the usual facilities for exposure in the
camera.
This shutter is provided with a spring catch or lock to securely attach it to the plate
or film frames or holders.
These frames or holders are faced with velvet plush or other suitable material and
are constructed to hold plates or films of any size smaller than their normal size and
are fitted with an eye or socket or other contrivance to receive the catch or lock of the
shutter and with interior catches to maintain the sensitive plate or film in position.
The various parts of the apparatus may be constructed of wood metal vulcanite or
other suitable material or combinations of materials.
And in order that my invention may be easily understood and readily carried into
practice I will proceed to describe the same with reference to the accompanying
drawings. Figure 1 of which shows an exterior front view of the box A in which the
plates are packed. Figure 2 shows exterior side view of the box and Figure 3
Sectional side elevation (on line 1. 1. Figure 1) showing how plate holders B are
arranged inside the box A. Figure 4 is front elevation and Figure 5 sectional side
elevation of the shutter or dark slide C. Figure 6 is front elevation and Figure 7
sectional side elevation of plate or film frame or holder B. Figure 8 sectional side
elevation of shutter C with holder B therein or thereon.
Figure 9 section. of the shutter C (on line a a Figure 4) and Figure 10 section of
the holder B (on line a a Figure 6) Figure 9 being made so as to fit over and encircle
or enclose the edges of Figure 10 as will be readily seen. Figures 11 and 12
respectively show sectional side elevation and plan of back part of a camera with the
slit or aperture for receiving the dark slide and holder, Figure 8.

page_text: The sensitive plate or other sensitive surface is placed in the holder B see Figures 6
and 7 and is retained behind the pins or projections band under the loose flap B which
flap B and edges all round (i.e. between the lines b¹³) are faced with velvet plush
or other suitable material for making a light tight joint and such holders are then
placed in the receiving box A all facing one way viz. either to the right, or to the left
as in Figure 3 in which 12 such holders are arranged but the box may be larger or
smaller as may be most convenient so as to hold a greater or less quantity-but in
order to ensure the perfect working of the apparatus the full number of holders B
which the box is made to hold must always be placed therein when preparing for use
so as to ensure all the holders being pressed tightly together by the springs and y
there being a thin sheet of metal or other material W inserted between the last plate
and the spring which acts as a protector or moveable partition.
Ir
The operation is as follows:-
The shutter or carrier C is inserted in the opening V Figure 3 and is pressed down
between the first two holders B in the box A. i.e. between the face of the outer plate or
film frame or holder B and the back of the contiguous one the turned over edges of
the shutter C encircling or enclosing the edges of the outer holder and is pressed right
to the bottom of the box the spring catch or lock C₁ on the shutter engages or
catches in the hole or recess 132 on the holder B securely attaching the holder and
shutter together see Figure 8 which may now be withdrawn from the box A the
sensitive surface being perfectly hidden from all light. The focusing frame in the
camera is then pressed back by means off Figures 11 and 12 sufficiently to allow this
shutter combined with the holder Figure 8 to be passed into the Camera in front of
the focusing register or frame g the dark back of the shutter being towards the lens
and the dark back of the holder being against the focusing frame the spring
which with the focusing register or frame is forced back as the slide (Figure 8) is
inserted until in proper position when the spring catch engages, and retains the
holder B which holder is kept in position by the springs h in the back of the focusing
frame.
of
The shutter C is then withdrawn by pressing knob C (Figures 5 and 8) which
releases C¹ from catch at B² and the sensitive surface is thus left in exact position
occupied by the focusing register g and ready for exposure in the ordinary way.
After exposure the shutter C is again pressed in over this holder to remove it from
the camera the catch C₁ retaining the holder B which is now released from spring
catch fand the two together B and C as in Figure 8 withdrawn from the camera and
transferred to the storage or receiving box A Figure 3 where it is inserted (by pushing
the sliding lids across over the opening Y) in the opening t and pressed between
spring and the protector or moveable partition W with the holder now turned
facing the unused plates so that when the shutter C is released from the holder B
and withdrawn the sensitive surface is towards the protector or moveable partition W
and the velvet or other facing makes a light tight joint. The operation may be
repeated until all the plates or films have been exposed or used up-which is shown by
the position of the protector or moveable partition W which will then have travelled
across the width of the box-the operator being careful to always withdraw each
holder from the opening and re-insert it at t or vice versa if the plates are arranged
the other way about.
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 :-
1. The improved shutter or carrier Carranged to act substantially in the manner
and for the purposes herein before described and represented in Figures 4, 5, 8 and 9
of the drawings hereto annexed.
2. The sensitive plate or film holder or frame B constructed and arranged substan-
tially in the manner and for the purposes hereinbefore described and represented in
Figures 6, 7, 8 and 10 of the drawings hereto annexed.
3. The improved arrangement and construction of the box A with springs c and y
and moveable partition or division plate W for holding or storing the sensitive plate

page_text: or film holders B substantially in the manner and for the purposes hereinbefore set
forth and represented in Figure 3 of the drawings hereto annexed.
4. The spring catch on the camera for holding and retaining the plate or film holder
while withdrawing the shutter C substantially as hereinbefore described and represented
in the drawings hereto annexed.
5. The use and application of the shutter C'in combination with the sensitive plate
or film frame or holder B together forming a complete dark slide which can be employed
in any light for transferring the sensitive film or plate in the holder B from the box
or reservoir A to the camera and return same to the box A substantially in the manner
and for the purposes hereinbefore described.
6. The combination of the several parts of the apparatus for storing carrying
exposing and changing the sensitive plates or films employed in obtaining photo-
graphic impressions in the camera substantially as and for the purposes hereinbefore
described.