Year: 1886

page_text: Date of Application, 17th Dec., 1886.
Specification Accepted, 18th Feb., 1887.
This Invention has for its object to render photographic apparatus more portable
and convenient than hitherto by reducing the bulk and weight thereof and also to
afford increased facilities for taking a series of views by providing a ready means for
using any number of plates with only a single back thus combining efficiency economy
0 and convenience.
The letters of reference in the following description refer to corresponding letters
on the accompanying drawings wherein siniilar letters indicate corresponding parts.
DESCRIPTION.
To carry out my invention I make the frame a (Figs. 1. 2. 3. 4 and 6) of the camera
back single with a slot in the top through which to insert the carrier and plates instead
of double or book-like or as a single frame wherein the carrier and plates are inserted
on each side; and I furnish its two sides on their inner edges with grooved guides b
(Fig. 1) and grooves e (Figs. 2. 3). These grooves c are continued round the inner
edge of the bottom of the frame and serve to carry the ordinary hinged sliding
panels (Figs. 4. 6) used for admitting or excluding the light to or from the plates.
A suitable opening e (Fig. 2) is formed in the top of the frame through which to insert
the carrier (Figs. 1. 5. 6.) into the grooved guides b.

page_text: By this improved construction of camera back any number of plates may be used
with only a single back while owing to this and also to the carrier taking two plates
instead of one only numerous plates can be readily carried by the operator thus greatly
increasing his facilities for taking a series of views.
Another advantage of my invention is that the operator can readily change the plates
in daylight by placing the top of the back in a light-tight, bag / (Fig. 6) fitted with an
elastic noose or its equivalent which serves to confine the mouth of the bag tightly
round the frame of the back as shewn in Fig. 6 and carefully inserting the carrier and
plates therein or withdrawing them therefrom as required.
It is obvious therefore that owing to a single back being sufficient for any number
of plates and also to the convenience afforded by my improved double carrier in
conjunction with the light-tight bag the weight and bulk of the apparatus is
considerably reduced and increased convenience and economy are obtained.
My invention is readily applicable to existing camera backs, and to camera backs so
made, by screwing or otherwise fastening the two frames together so as to form a
single frame and fitting the same with grooved guides so as to carry my improved
double carriers in the manner hereinbefore described.
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° Making a camera back with a single frame substantially as hereinbefore described
and shewn.
20 Providing such frame with grooved guides substantially as hereinbefore described
and shewn.

page_text: 3° Making the carrier for photographic plates with a single frame and otherwise as
hereinbefore described and shewn.
4° The improved construction of photographic camera back and carrier substantially
as herein before described and shewn.
5° The use in conjunction with such improved camera back and carrier of a light-
tight bag furnished with an elastic noose or its equivalent for changing the carrier and
plates substantially in the manner hereinbefore described.
6° The application of my invention to existing camera backs, and to camera backs
so made, by converting the two frames into a single frame and otherwise substantially
as hereinbefore described.
ELT & Co.,
33, Southampton Buildings, Holborn, London,
Agents for the Applicant.