Improvements in Changing Boxes for Photographic Dry, Plates and in Camera Slides to Work with the same.
Year: 1890

page_text: Date of Application, 27th June, 1890-Accepted, 16th Aug., 1890
COMPLETE SPECIFICATION.
Improvements in Changing Boxes for Photographic Dry, Plates and
in Camera Slides to Work with the same.
1, GEORGE WILLIAM SHAILER, of Palmerston North in the Provincial District of
Wellington, and Colony of New Zealand, 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
The object of my invention is to provide a simple and portable changing box for
photographic dry plates capable of containing a large number of such plates, and so
that they can be removed from the box to the slide, and returned with facility without
injury by light.
n
In order that my invention may be easily understood I will proceed to describe the
same and for that purpose shall refer to the accompanying sheets of drawings
Nos. 1 & 2, on which similar letters of reference indicate corresponding parts in all.
the figures.
Fig. 1 is a front view of my improved changing box and camera slide.
Fig. 2 is a transverse section of the same.
Fig. 3 is a plan of the sliding lid of the box with the camera slide removed.
Fig. 4 is a plan of the underside of the camera slide.
Fig. 5 is an end view of Fig. 3.
Fig. 6 is an end view of Fig. 4.
Figs. 7 & 8 are a plan and side view of the guides for the sliding lid of the
changing box.
(a) is the changing box having divisions or grooves (a¹) at each end to hold the
dry plates in position. The box is shewn for twelve plates.
(b) is a slide or cover to the changing box (a), having a band (6¹) formed (by
preference) of slats of wood fastened to a leather belt; this slide and band fit
closely to the top of the changing box which is covered with velvet to exclude the
light, but in such a manner that the slide (6) can traverse across the box from 1 to 12.
(c. c.) are plates screwed to the ends of the box (a) and having lips projecting
inwards to overlap and form grooves in which the ends of (b) and (¹) can slide:
and having notches 1 to 12 in their upper edges to mark the distance travelled.
(d) is a spring fastened to the face of (b) and which fits into the notches 1 to 12,
but is of such strength that the slide (6) may be able to move across the box (a).
(e) is an orifice forming a communication between the changing box and the
camera slide which in traversing across the top of the changing box is made to.
correspond with either of the divisions according to which of the notches to 12
is occupied by the spring (d).
(e) is a slide which closes the orifice (e) when desired; this slide has a spring (e²)
to keep it closed but allowing it to be opened by pulling the projecting portion (3)
of the slide or by pressing outward the hinged piece (f) by means of its lip (ƒ¹).
(9) is the camera slide made to receive one dry plate and having the usual slide (¹)
working in grooves and also having a groove and velvet covered packing at (9²) ;
at the base of the slide is a tee piece sliding into the top of the cover (b) entering
at (A), (See Figs. 1 & 3).
(h) is a slide which closes the orifice of the camera slide when desired, this slide
has a spring (h¹) to keep it closed but enabling it to be opened by pulling the
projecting portion (2) of the slide or by pressing outwards the hinged piece (i).
(k) is a cam or wedge piece fastened to and projecting above the surface of the
sliding lid (b) for a purpose to be hereinafter described.
It will be seen from this description of the several parts and by reference to the
drawings that my invention consists of a changing box (a) having divisions to
:

page_text: receive any number of plates, but twelve (by preference) as shewn in Fig. 2, that
the upper surface of this box is covered with velvet on which slides or revolves
(light proof) backwards or forwards the cover (b) with its band (6'), that this cover
is held in position by the guide plates (c. c.) in which it is free to move or revolve
and has a slide (e¹) to cut off the connection with the camera slide.
It will further be seen that the said camera slide (g) slides and dovetails into the
cover (b) and is also fitted with a slide (h) for a similar purpose viz., to cut off and
secure the dry plate in the camera slide box. Both the slides (h) & (e¹) have
springs (¹) & (e) by which they are kept closed so that when separated the box (a)
and camera slide (g) hold their respective dry plates light proof.
The cover (b) can be slid from 1 to 12 and by the spring (d) can be made to stop
at any of the recesses 1 to 12 so that when the slides (e) & (h) are drawn back a dry
plate can be taken out from the case (a) and delivered to (9) by simply turning the
apparatus upside down. The camera slide can then be removed, operated on, and
returned to the box by the camera slide being again placed in position as shewn in
Fig. 2, then if the cover (b) be moved by pressure of the thumb of the operator one
division forward; the camera slide (9) can by another reversal be supplied with a
fresh plate which can again be returned by a similar operation and so on until the
whole of the plates from 1 to 12 have been made use of and returned. In the
operation of sliding the camera slide (g) into its position on the cover (b) the angular
projection on the hinged piece (i) comes into contact with the cam or wedge piece (k)
by which it will be pressed outward and open the slide (h), and at the same time the
hinged piece (i) presses against the inner end of the lip (f) of the hinged piece (ƒ)
and opens the slide (e') also, and thus both the slides (h) & (e¹) can be opened
automatically by placing the camera slide in position.
Having now described and particularly ascertained the nature of my invention
and how the same is or may be carried into effect, I wish it to be understood that
I do not confine myself to the exact details, but what I claim as my invention and
desire to secure by Letters Patent is :-
1st. The changing box (a) having divisions (a¹) and guide piece (c) with a
cover (b) with elastic revolving attachment (1) substantially as described herein and
illustrated in the accompanying drawings.
2nd. The changing box (a) having a removable cover (6) and revolving attach-
ment (6) with spring valve or slide (e¹) substantially as described herein and
illustrated in the accompanying drawings.
3rd. The changing box (a) with its cover (b) and revolving attachment (61) spring
valve or slide (el) combined with the camera slide (9) substantially as described herein
and illustrated in the accompanying drawings.
4th. In a changing box and camera slide the levers (i) & (f) with cam or wedge
piece (k) as and for the purposes substantially as hereinbefore described.
5th. The changing box for photographic dry plates with camera slides substantially
as described herein and illustrated in the accompanying drawings.
Dated this 27th day of Inno 1890
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.