Improvements in Apparatus for use in Taking Photographic Pictures.
Year: 1889

page_text: Date of Application, 10th Jan., 1889
Complete Specification Left, 10th Oct., 1889-Accepted, 7th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for use in Taking Photographic
Pictures.
I CHARLES WINTER London Manager to Messrs. Mawson & Swan of 33 Soho
Square in the County of Middlesex do liereby declare the nature of this Invention to
be as follows:-
The principal object of this Invention is to provide a photographic apparatus
in which a number of plates or sensitized surfaces are placed in succession in position
for receiving the photographic image and are afterwards returned to a receptacle
in which they are retained without opening the camera or exposing the plates or
surfaces to light otherwise than in taking the picture.
According to my Invention as applied to photographic purposes I provide a
suitable closed box or camera in which there is a lens provided with a shutter.
Inside this camera opposite the lens is a rotary device into which the sensitized
plates or surfaces are introduced one after the other from a box and from which
rotary device they are liberated and received into another box after the picture has
been taken thereon. This rotary device constitutes the "slide " of the camera and is
hereinafter referred to as the rotary slide.
The said rotary slide has one end of its axis projecting from the camera and is
provided with a milled head or other means for giving rotary movement to it. The
box which contains the unexposed sensitized plates or surfaces and the box into
which the plates or surfaces are received after.exposure are situated inside the camera
preferably occupying the space above and below the lens.
The box from which the plates are supplied to the rotary, slide is provided with
means by which when the rotary slide is operated the undermost of the plates is
moved from off a support and falls into a position before a slot in the box through
which the plate can fall or be moved into grooves or guides for receiving it in the
rotary slide These means may consist of a piece which is operated by a projection
or recess on the rotary slide which projection or recess when movement is given to
the slide causes the said piece to move inwards a pusher bar or the like which dis-
lodges the undermost plate and causes it to take up a position in which it can leave
the box and be received in the grooves or guides for it in the rotary slide. A rotary
movement is then given to the slide and thereby the sensitized side of the plate is
presented in position to receive the photographic image and when the shutter is
opened the plate or sensitized surface receives the said image and when thereafter
the shutter is closed the rotary slide has a further movement of rotation given to it
which brings the guides or grooves containing the plate into line with the box which
is to receive the exposed plates. This preferably consists of a box with an opening in
it to admit the plate and provided with pushers which are operated by the rotary
slide to press the plate into the box until it is received and retained under retainers
when the pushers return to their normal position-It is preferred to make the rotary
slide with two sets of grooves or guides so that when one is in line with the box
from which the unexposed plates are to be discharged the other is in line with the
box into which the exposed plates are to be received. The plates may be moved from
and into the boxes respectively by being caused to fall by gravity or there may be an
endless band or carrier or other device for the purpose operated by the rotary slide.
The shutter may be arranged to be set either by hand or by a movement derived
from the rotary slide. The movement liberating the shutter for the exposure or
uncovering of the lens being actuated by band. Thus in the arrangement wherein
there are two receptacles for plates in the rotary slide the said slide is brought into a
position to receive a plate from the box containing the unexposed plates and in this

page_text: After
movement a plate is brought into position for passing from the box into the rotary
slide as aforesaid. When the plate is received into the rotary slide a quarter turn
is given to the said slide and the plate is then in position for exposure.
exposure a further quarter turn is given to the rotary slide when the plate, which has
been exposed is brought into line with the box for receiving the exposed plates the
other guides in the slide then being in position for receiving a fresh unexposed plate
and so on: The axis of the rotary slide or the head or handle by which it is operated
may be provided with a catch or spring bolt engaging with retainers so that the slide
is kept in proper position the positions being suitably marked outside the Camera,so
that the position of the rotary slide can be readily ascertained. The portion of the
said slide upon which the plates rest when in position for exposure are made moveable
and are operated by a cam or other suitable device so as to move free of the plate
when it is to leave the rotary slide.
Although I have mentioned plates the Invention is of course not limited to the
glass plates known as plates"in photography as other sensitized surfaces may be
used:
$6
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for use in Taking Photographic
Pictures.
I CHARLES WINTER London Manager to Messrs. Mawson and Swan of 33 Soho
Square in the County of Middlesex do hereby declare the nature of this Invention and
in what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
The principal object of this Invention is to provide a compact photographic
apparatus in which a number of plates or sensitized surfaces are placed in succession
in position for receiving the photographic image and are afterwards returned to a
receptacle in which they are retained without opening the camera or exposing the
plates or surfaces to light otherwise than in taking the picture.
According to my Invention I provide a suitable closed box in which there is a
lens provided with a shutter. Inside this box opposite the lens is a rotary device into
which the sensitized plates or surfaces are introduced one after the other from a
box or holder and from which rotary device they are liberated and received into
another box or holder after the picture has been taken thereon. This rotary device
constitutes the "slide" of the camera and is hereinafter referred to as the rotary
slide.
The said rotary slide has the end of its axis projecting from the camera and is
provided with a milled head or other means for giving rotary movement to it. The
box or holder which contains the unexposed sensitized plates or surfaces and the box
or holder into which the plates or surfaces are received after exposure, are situated
inside the camera occupying the space above and below the lens or the space for the
passage of light from the lens to the exposed plate.
The box or holder from 'which the plates are supplied to the rotary slide is
provided with means by which when the rotary slide is operated the undermost of the
plates is moved from off a support and falls into a position before a slot in the box
or holder through which the plate can fall or be moved into grooves or, guides for
receiving it in the rotary slide. A rotary movement is then given to the slide and
thereby the sensitized side of the plate is presented in position to receive the
photographic image and when the shutter is opened the plate or sensitized surface
receives the said image and when thereafter the shutter is closed the rotary slide has
a further movement of rotation given to it which brings the guides or grooves
containing the plate into line with the box or holder which is to receive the exposed
plates. It is preferred to make the rotary slide with two sets of grooves or guides so

page_text: that when one is in line with the box or holder from which the unexposed plates aro
to be discharged the other is in line with the box or holder into which the exposed
plates are to be received. The plates may he moved from and into the boxes or
holders respectively by being caused to fall by gravity or there may be an endless
band or carrier or other device for the purpose operated by the rotary slide. The
shutter may be arranged to be set either by hand or by a movement derived from the
rotary slide. The movement liberating the shutter for the exposure or uncovering of
the lens being actuated by hand. Thus in the arrangement wherein there are two
receptacles for plates in the rotary slide the said slide is brought into a position to
receive a plate from the box or holder containing the unexposed plates and in this
movement a plate is brought into position for passing from the box or holder into the
rotary slide as aforesaid. When the plate is received into the rotary slide a quarter.
turn is given to the said slide and the plate is then in position for exposure. After
exposure a further quarter turn is given to the rotary slide when the plate which has
been exposed is brought into line with the box or holder for receiving the. exposed
plates the other guides in the slide then being in position for receiving a fresh
unexposed plate and so on. The rotary slide or the head or handle by which it is
operated may be provided with a catch or spring bolt engaging with retainers so that
the slide is kept in proper position the positions being suitably marked outside the
camera so that the position of the rotary slide can be readily ascertained. The portion
of the said slide upon which the plates rest when in position for exposure are made
moveable and are operated by a cam or other suitable device so as to move free
of the plate when it is to leave the rotary slide.
Although I have mentioned plates the Invention is of course not limited to the
glass plates, known as plates in photography as other sensitized surfaces may be used.
In order that my Invention may be more clearly understood I will describe the
same more particularly with reference to the accompanying drawings wherein
Figures 1 and 2 illustrate an apparatus constructed according to this Invention.
Figures 5. 6 and 8 illustrating an alternative form of apparatus also constructed
according to this Invention, Figures 3. 4, 7 9 and 10 being views of details herein-
after described. Similar reference numerals are used for corresponding parts in all
Figures of the drawings.
".
The side elevation Figure 1 and the plan Figure 2 illustrate an apparatus in
which the box 1 containing the unexposed sensitized plates with their sensitized
surfaces downward and the box 2 into which the plates or surfaces are received after.
exposure are attached to the frame plates 12 and 13 and are arranged so as to leave a
space between them as at 3, in which space is placed the lens 123 through which the
rays of light pass towards the rotary slide 4. The rotary slide 4 (shewn also in
Figure 4 which is an end view of the slide alone) consists of two discs 5, 6, connected
by the plates or distance pieces 7, 7 and also by the frames 8, 8 which latter with
the ledges 9. 9 form two guides or grooves 74 for the reception of the photographic.
plates one of which is shewn in position at 15 figure 4. This rotary slide has two.
centres 10, 11 the centre 10 being fixed to the plate 5 turns in a hole in the plate 12
which forms with the plate 13 and the rods 14 the main frame work of the apparatus,.
while the centre 11 is firmly secured to the plate 13 so that it may not rotate and
carries the cam 16 which by the movement of i the rotary slide 4 upon its
centres 10, 11 is caused to operate at suitable intervals the levers 17 carried upon
centres 91 on the said slide which levers have arms 18 so formed as to be capable of.
closing as shewn the ends 19 of the grooves 71 of the rotary slide before either
guide arrives in position to receive a plate from the upper box 1. the arms 18 keeping
the guides closed except at such times as a plate has to be delivered. into the box 2..
The lowermost sensitized plate in the upper box is brought into readiness by means
to be hereinafter described so that by tilting the apparatus as a whole it may slide out
of the box 1 into the guide 74 by the opening 20 when the door or flap 21 (see.
Fig. 10, which is an enlarged view of the box 1) is opened, one of the said arms 18
retaining the plate in the guide whilst by the rotation of the slide through a quarter
of a revolution in the direction of the arrow the plate is brought into the vertical

page_text: position in which it is exposed; the sensitized surface of the plate being at that side
thereof which is nearest to the lens. A further rotation of the slide in the same
direction through another quarter of a revolution brings the groove containing the
plate opposite to the inlet 22 of the lower box 2 by which time the cam 16 has ceased
to act upon the lever arm 18 so that it is raised by its spring 92 as shown with
reference to the lower groove in Figure 1 and leaves the plate free which is then
caused to slide out of the groove into the said box by the apparatus as a whole being
tilted for the purpose.
The door or Hap 21 before referred to is retained in the closed position (see
Fig. 10) by the edges of the discs 5, 6 except when a groove 74 of the rotary slide is
in position to receive a plate at which time one of the notches 93 in each disc comes
opposite to the door 21 which may be caused to fall into the said notches under the
influence of the pressure of the plate which is then free to slide forth. The return of
the plate into the box 1 is prevented by the arrangement of rails 50 upon the floor of
the box 1 at a slightly higher level than the bottom of the guide 74.
When the rotary slide is moved after the reception of a plate the lower edges of
the notches 93 move the door 21 into its closed position in which it is retained as
before described. The door 21 when closed prevents the admission to the interior of
the box 1 of light reflected from the plate during exposure.
To prevent the plates which are received into the guides 74 from shaking or moving
during their exposure an arrangement which is now to be described is applied to the
rotary slide of Figures 1, 2 and 4. It is not however illustrated in connection with
those Figures in order to avoid confusion in the drawings but is illustrated as applied
to a similar rotary slide in Figures 5, 6, 8 and 9 in which spring fingers 80 are
carried by a plate 81 hinged at 82 to the rotary slide, and by the action of plate
springs 83 bearing upon the frame of the rotary slide are kept clear of the guides 74
as in Figure 5 until such time as the rotary slide is turned in the direction of the
arrow towards the position illustrated in Figures 8 and 9 (in which a similar rotary
slide is shown in its application as part of an alternative form of apparatus con-
structed according to this Invention, which alternative form is to be hereinafter
described) by which movement pins 84 projecting from the plates 81 carrying the
fingers 80 and projecting through openings 85 in the disc. 61.come under a cam
surface 86 carried by the fixed arm 87 which surface depresses the pins 84 to the
level of the surface of the disc 6 and thus moving upon its hinges against the
resistance of the springs 83 the plate 81 to which the fingers 80 are attached, causes
the said fingers to bear upon the back of the sensitized plate and to press the plate
closely against the bearing surface of the groove of the rotary slide and thus retain
it firmly while the exposure takes place and thereafter until the rotary slide is
turned further in the direction of the arrow and the pins 84 are no longer depressed
by the cam surface 86 when the plate springs 83 cause the plate S1 and the spring
fingers SO to resume the position illustrated in Figures 5 and 6. The details of the
mechanism of the boxes 1, 2 are presently to be fully described.
The movement of the rotary slide shown in Figs. 12 and 4 is effected by means of
a-finger piece 23 which projects from the exterior of the box or camera in which the
apparatus is placed. The said finger piece is attached to a disc 24 and works in a
slot 25 in the frame plate 12 which limits its travel.
Letters or other indications upon the rotary slide are so arranged as to come
opposite an opening in the case containing the apparatus so as to afford to the
operator indications as to the position of the rotary slide.
A ratchet tooth 26 is attached to and moves with the disc 24 and gears with the
ratchet wheel 27 secured to the rotary slide. The edge 28 of the slot 25 stops the
upward movement of the finger piece 23 so that the motion of the disc 24 is arrested
at a point at which the ratchet drops in readiness to gear with the tooth next in order
upon the ratchet wheel 27, and when the finger piece 23 and disc 24 are moved in
the direction of the arrow (Figure 1) the ratchet 26 turns the rotary slide 4 through a.
quarter of a revolution, overrunning of the rotary slide through a greater distance
being prevented by a banking piece 94 which turns on a centre 95 fixed to the main

page_text: frame. This banking piece. is pressed constantly downwards by the spring 97 the
pin 96 limiting its downward travel and bearing upon the fixed ring 32 and is
provided with a tooth or detent 98 which is shown in Figure 1 as lying in the path of
travel of pins 30 upon the rotary slide, one of which pins abuts against the detent
upon the completion of each quarter-revolution of the slide, but when the disc 24 is
returned into position for the ratchet 26 to gear again with the ratchet wheel 27, the
curved piece 99 upon the disc lifts the banking piece 94 by means of the
projection 100 and the detent 98 is lifted so that the pin last abutting against it may
move past it in the next movement of the rotary slide, the curved piece 99 being of
such a length that it retains the banking piece in its raised position until just before
completion of the quarter-revolution when the curved surface passes from under the
projection 100 and the spring 97 forces the banking-piece down so that the detent
intercepts and stops the pin next following. (Or in substitution for this banking-
piece 94 and the means for operating it. I may use a retaining, device hereinafter
described with reference to Figures 5, 6, 8 and 9 and indicated by the numerals 8
and 89.)
The ends of the pins 30 bear upon a loose ring 31 lying in and upon another
ring 32 attached to the frame plate 12. The ring 32 in addition to forming a bearing
for the loose ring 31 forms in combination therewith a recess which contains the
disc 24 hereinbefore referred to.
The mechanism of the boxes 1 and 2 which hold the photographic plates before
and after exposure respectively is arranged and operated as will now be described
with reference to Figures 1. 2, 3 and 10, Figure 3 being an end view of the boxes
alone and Figure 10 being a side elevation of the box 1 on a larger scale.
=
To charge the upper box 1 with sensitized plates the lid 33 is opened and a series
of plates with their sensitized faces downward is placed in the box one end of the
lowest plate of the series of sensitized plates resting upon a fixed ledge 34 the other
end resting upon a moveable ledge 35 as shewn with reference to the plates 36
Figures 1 and 10. Springs 37 are attached to the inside of the lid of the box so as
to press constantly downward upon the plates and prevent them from being shaken
about in the box. If now the rotary slide he turned from its present position through
a quarter of a revolution the quarter of a revolution next following will bring one.of
the pins 38 on each side of the rotary slide into gear with the upper edge of the
lower portion 39 of a slot in the rocking pieces 40 which will be moved about their
centres 41 into the position indicated by dot and pick lines Figures 1 and 10
thereby causing the rods 42 connected to the rocking pieces at 43 and to the ledge 35
by the long pin or rod 44 to move the ledge into the position shown at 45 the end of
the ledge at the same time being lowered the ledge receiving partial rotation on its
axis 44 by the projection 101 on the said axis coming into contact with the edge of an
opening at 102 one end of the lowest sensitized plate being thus lowered into the
position shown by the plate 46 Fig. 1. the ends of the plates resting upon that lowermost
one being simultaneously lowered. The opposite end of the plate will next be pushed
off the ledge 34 by the action of a pusher bar 47 which travels upon the ledge 34
the end of the next plate above then falling on to the pusher bar whose ends 48 are
operated by the edges of the boles 49 in the rocking pieces 40 and thus the plate is
placed upon small rails 5 the said rails so supporting the sensitized plate at or near
its edges, that no portion of the sensitized surface except that in contact with
the rails may be rubbed or abraded, and thus the plate on the bottom of the box 1
is free to slide out into the groove of the rotary slide 4 when next the apparatus is
tilted.
The withdrawal of the ledge 35 is caused to take place earlier and at a greater
speed than that of the pusher bar 47 because the former is operated by a rod attached
to a portion of the rocking piece 40 which is at a greater radial distance from the
centre 41 than the hole 49. whose edges operate the pusher bar 47 and also the
operating edge of the pusher bar is so placed that it has a certain distance to travel
before coming into contact with the plate to commence pushing.
The pin 38 on the rotary slide having traversed the lower and shorter portion of

page_text: the curved slot and having performed the operations above described passes into the
upper portion 51 of the curved slot and pressing against its left hand edge returns
the rocking pieces to the position shewn in fall lines (Figures 1 and 10) the pusher
bar 47 slides from under the end of the plate which rested upon it and the curved
slide 3 re-enters the box 1 the leading edge thereof forcing forward slightly the
plate which lies horizontally on the rails 50 then passes under the end of the plate or
pile of plates which is or are immediately above and bearing upon the right hand
end of the plate lying on the rails 50 and being then rotated on its axis by the action
of the tail pieces or projections 52 which come into contact with the edges of
openings 123 in a plate 53 raises the superincumbent plate or plates to a horizontal
position in readiness for a repetition of the before described series of operations and
thereby frees the plate on the rails 50 from pressure, which plate may, when the
rotary slide is in readiness to receive it, slide out readily from, the box 1 as has been
hereinbefore stated.
The lower box 2. receives as has been stated the plates from the rotary slide after
exposure. Each plate on sliding into the box is received upon two ledges 55, see
Figure 3, hinged to the outside of the box at 50 the said ledges having each a tail
piece 57 upon which bears a spring 58 which prevents the ledges from being
rotated upon their hinges by the weight of the plate See now Figs. 1 and 3; in the
quarter revolution of the rotary slide ensuing next after the plate has been received
upon the ledges 55 pins 38 in the discs of that slide force the slider 59 in a
horizontal direction between the guides 60 into the position shewn by dotted lines in
Figure 1 against the resistance of the spring 61. This slider 59 is provided with
inclined slots 62 through which pass pins 63 screwed into small plates 64 sliding
vertically in guides 65 attached to the side of the box 2 and carrying pins 66 as
shown. Upon the operation of the horizontal slider 59 as described the edges of
the inclined slots 62 draw down the sliding plates 64 and the pins 66 enter the box
through slots 67 provided for that purpose just clear of the ledges 55 and come into
contact with the upper portion of the plate 68 (Figure 3) resting upon the said
ledges causing the ledges to rotate upon their hinges against the resistance of the
springs 58 to allow the plate to pass forcing it down on to the springs 69 the ledges
being returned by their springs 58 (after the passage of the plate) to the horizontal
position in readiness for another plate. The springs 69 receive each plate as it
descends from the ledges 55 and serve to maintain, a constant upward. pressure upon
the plates in the lower box keeping them always in contact with the under side of
the ledges 55 and preventing them from being shaken about in the box. In order to
prevent the springs 69 from obstructing the entrance of the plate which first enters
the box 2 it is necessary to provide a metal or other plate 70 which shall be borne
upon the springs 69 and shall be in contact with the under side of the ledges 55.
So soon as the pin 38 operating the horizontal slider 59 has passed the angle 71
the slider is returned by the spring 61 to the position indicated in full lines
(Figure 1) in readiness for being again operated; and in this return travel the
vertical sliding plates 64 are caused by the inclined slots 62 to resume their normal
position which is that shown clearly in Figure 3.
A lid 72 to which the springs 69 are attached is provided for the box 2 to admit of
the removal of plates which have been exposed.
A modification of the apparatus constructed according to this.invention is illustrated
in Figures 5, 6, 7, 8 and 9.
In this apparatus the rotary slide 4 is provided with two sets of guides 74 for the
reception of sensitized plates, the form and arrangement of the guides and of the
pressing fingers for preventing the shaking of sensitized plates therein being exactly
similar to those described with reference to Figures 1, 2 and 4.
In the side elevation Figure 5 and in the corresponding plan Figure 6 the rotary:
slide 4 is shewn as being in readiness to receive and to deliver up the unexposed, and
exposed plates respectively; and in Figure 8 an additional side elevation with its
corresponding plan Figure 9, the rotary slide is shown as carrying a plate 73 in the
position for exposure. In this apparatus the device for proventing the sensitized

page_text: plate from dropping out of either groove 74 in the rotary slide 4 consists of a right
angled piece 75 hinged at 76 to the sides of the rotary slide, and acted upon by a
spring 77 which maintains the right-angled piece constantly in position to close the
groove in the manner shown with reference to the upper groove in figure 5 and to
both grooves in Figures 8 and 9 but when it is desired that the groove shall be free
to discharge an exposed plate, the pins 78 fixed to the said right angled pieces are, hy
the movement of the rotary slide 4 brought into contact with a hinged projection 79
on the main frame of the apparatus just previous to the arrival of either groove in
the present position of the lower groove of Figure 5, so that when the groove has
assumed a horizontal position the right-angled piece 75 will have unclosed the end of
the groove as shown? from whence the sensitized piate may slide. On the further
rotation of the rotary slide the 'pin 78 upon the right angled piece 75 passes clear
of the projection 79, and the spring 77 causes the said right-angled piece to re-close
the groove.
A spring arm 88 upon the main frame 18 carries a detent 89 which is pressed into
notches 90 in the edge of the disc 5 of the rotary slide which is by this means stopped
at every quarter-revolution and retained in position, a handle or key (not shown in
the drawings) by which the rotary slide is operated' being so shaped that it may
indicate the position of the grooves of the rotary slide.*
The lift 103 containing the sensitized plates or surfaces is illustrated in side*
elevation in Figures 5 and 8, in plan in Figure 6, and in front end elevation in
Figure 7. It is fitted with four series of ledges, those numbered 104 constituting
grooves for receiving the unexposed plates, and those numbereil 105 constituting
grooves which receive the plates after exposure. The lift is fitted to slide with
steadiness in vertical guides '106 attached to the main frames 12, 13 of the apparatus,
and is caused to rise or fall therein by a pinion 107 which gears into a toothed
rack 108 fixed to one side of the cage. The pinion 107 is fixed upon the spindle of a
spur wheel 109 turning in bearings secured to the main frame 13. and gearing with a
spur pinion 110 secured upon the rotary slide. By this train of gearing the cage 103
receives an amount of movement so proportioned to that of the rotary slide that for
each successive half-revolution of the said slide the lift is lowered so as to present in
order the discharging and receiving grooves of the lift to the guides of the rotary
slide. The said discharging "grooves 104 are equal in number to the receiving
grooves 105 and at the commencement of the use of the apparatus the cage 103 being,
as shown in Figures 5 and 7 at the upper limit of its travel, the grooves 14 are
filled with plates having their sensitized surfaces downward. The lowermost of the
series of grooves 104 will then be in readiness to deliver up its plate to the rotary
slide through the non-return door 121 in the frame plate 112 in which slide it will be
first exposed with its sensitized surface nearest to the lens and then delivered
sensitized side upward to the lowermost of the series of grooves 105 which by the
descent of the cage will have been brought into position to receive it by way of the
non-return door 122 at the same time that the groove next in succession to the lower-
most one of the series 104 is in position to deliver a fresh plate to the rotary slide.
The lift 103 is lowered in successive steps, in each of which steps the lowermost
plate of those in the upper series of grooves 104 is removed and, becomes in turn the
uppermost of a series of plates which is accumulated in the lower series of grooves.
The lower series is thus filled as the upper series is emptied and owing to the
regulated descent of the cage the two plates which at any time immediately before or
after the charging and discharging of the rotary'slide are the lowermost and upper-
most ones of the upper and lower series respectively are maintained at a constant
distance apart, which distance is determined by the width between the two guides 74
of the rotary slide, and through this passage, which is practically constant in position
with regard to the rotary slide, passes a tube or tunnel 111 enclosed by the sides of
the lift 103 and secured to the frame plates 112 which in turn are secured to
guides 106 forming portions of the rigid framework of the apparatus. The said
tube carries a lens 123" of any suitable character through which lens light travels to

page_text: the sensitized plate at 73 (see Figure 8) whilst the access of light to the interior of
the lift 103 is prevented.
To ensure that the side of the lift 103 at 113. shall not descend through a greater
distance than the side carrying the rack 108 a series of teeth. 114 is affixed to the
lift at 113 and arranged to gear with a ratchet arm 115 centred at 116 and supporting
by the teeth 114 the part of the lift to which they are affixed..
The said ratchet arin is operated by the cam-surfaces 117 placed upon the rotary
slide in such positions that they raise the projection 118 forming part of the ratchet
arm 115 and thus move the said ratchet out of gear with the teeth 114 just before the
downward movement of the cage commences, releasing the projection 118 just after
a portion of that downward movement has taken place and allowing the spring 119
bearing upon the projection 118 to move the ratchet arm 115 into position to engage
with the tooth next in order in the series at 114 (see Figure 8) and thus to check at
that side of the cage its downward movement.
A scale or index is placed upon the lift 103 so that its indications may by the
movement of the lift be presented in succession before an opening in the case
containing the apparatus, so that the operator may be informed as to the number of.
the plate which is in position for exposure.
Other openings covered by ruby glass may be placed so as to command a view of
the interior of the case and enable the operator to observe the position of the plates
and guard against damage which might ensue upon attempts to forcibly operate the
apparatus in the event of a plate "jamming" or failing to take up a proper position
in the cage or in the rotary slide.
22
When the lift 103 has reached the lower limit of its travel (by which time, the
upper series of grooves 104 is assumed to be empty and the lower series 105 full) the
plates should be withdrawn from the lower series 105 and the lift be returned to
the position from whence it started, by turning the rotary slide in the opposite
direction to the arrow and so operating the train of gearing 110, 109, 107, 108 to
raise the cage.
No opposition is offered by the ratchet arm 115 to this upward movement of the
cage, and the projection 79 only operates the pins 78 when the rotary slide is turned
in the direction of the arrow, for when the pins 78 by the reversal of motion of the
rotary slide travel in the opposite direction they depress the projection 79 by turning
it on its hinge against the resistance of the spring 120 which is for the purpose of
returning the projection to its normal position in which it is rigid when struck by
pins travelling in the direction of the arrow.
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
1st. In apparatus or cameras for taking photographic pictures the combination with
a receiver in which the sensitised plates or surfaces are exposed of receptacles for
such plates or surfaces before and after exposure these receptacles being situated
above and below the space for the passage of light from the lens to the exposed plate
or surface substantially as hereinbefore described.
2nd. In apparatus or cameras for taking photographic pictures a device such as I
have called a rotary slide with means for receiving holding and discharging sensitised
plates or surfaces substantially as hereinbefore described.
3rd. In or for apparatus or Cameras for taking photographic pictures the
combination of parts constituting an apparatus for containing and consecutively
removing for exposure sensitized plates or surfaces the said apparatus being con-
structed and arranged substantially as hereinbefore described and illustrated in
Figure 10 of the accompanying drawings.
4th. In or for apparatus or Cameras for taking photographic pictures the
combination of a box or holder 2 with the horizontal slides 59 vertical slides 64 and
their attachments the whole being arranged and combined substantially as and for the

page_text: purpose hereinbefore described and illustrated in Figures 1, 2 and 3 of the
accompanying drawings.
23
rotary
5th. In or for apparatus or Cameras for taking photographic pictures a
slide in combination with a container for sensitized plates or surfaces and means for
raising lowering and sustaining in position the said container in accordance with
the rotation of the said slide substantially as hereinbefore described and illustrated in
Figures 5, 6, 7, 8 and 9 of the accompanying drawings.
6th. In or for apparatus or Cameras for taking photographic pictures a container
for sensitized plates or surfaces before and after exposure adapted to be moved as the
plates or surfaces are removed and exposed and restored to the container so that a
space for the passage of light is preserved between the exposed and non-exposed
plates or surfaces substantially as hereinbefore described and illustrated in Figures 5,
6, 7, 8 and 9 of the accompanying drawings.
7th. The construction and arrangement of parts constituting an apparatus for use
in taking photographic pictures substantially as hereinbefore described and illustrated
in Figures 1 and 2 of the accompanying drawings.
Sth. The construction and arrangement of parts constituting an apparatus for use
in taking photographic pictures substantially as hereinbefore described and illustrated
in Figures 5, 6 and 7 of the accompanying drawings.
J. H. JOHNSON & Co.,
Agents.