Improvements in Cameras used in Photography.
Year: 1897

page_text: Date of Application, 13th May, 1897
Complete Specification Loft 12th Foh 1800 A'cented
0th Ann 1900
PROVISIONAL DIEUITICALIUM..
Improvements in Cameras used in Photography.
We, ROBERT LIONEL FOSTER and ALWYN FOSTER, of Park House, Queensbury,
in the County of York, Gentlemen, do hereby declare the nature of this invention
to be as follows:-
This invention relates to what are known as twin lens cameras and the object of
the invention is to so construct the camera as to dispense with one of the lenses
and by a subdivision of the framing of the camera to render the same available as
an ordinary single lens hand camera.
According to this invention we mount a single lens in a slide so as to be move-
able and available for purpose of focusing and afterwards by moving the lens along
its slide opposite the sensitive plate aperture, the lens is available for taking the
photograph.
The movement of the lens from the sensitive aperture to the focusing aperture
closes the first named aperture.
The upper part or half of the camera is removeable and the slide also being
removed, the remaining portion of the framing and the one lens constitute a single
lens hand camera.
The cost of production of the improved camera, as also the space occupied, are
greatly reduced, when used as a hand camera.
Dated this 13th day of May 1897
BRIERLEY & HOWARD,
Penny Bank Chambers, Halifax, Agents for the Applicants.
We, ROBERT LIONEL FOSTER and ALWYN FOSTER, of Park House, Queensbury,
in the County of York, Gentlemen, 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 what are known as twin lens cameras and the object of
the invention is to so construct the camera as to dispense with one of the lenses
and by a subdivision of the framing of the camera to render the same available as
an ordinary single lens hand camera.
Such being the nature and object of our said invention, the following is a com-
plete description of same, reference being had to the annexed drawings, in

page_text: Fig. 1 is a front elevation of the improved camera.
Fig. 2 is a side elevation of the said camera, part of the frame being broken away
to shew the interior.
Fig. 3 is a side view of the upper part of the camera which forms a single hand
or ordinary camera.
According to this invention we mount a single lens 1 in a slide 2 so as to be move-
able and available for purpose of focusing when in the position shewn by Figs. 1
and 2, and afterwards by moving the lens 1 along its slide 2 opposite the sensitive
plate aperture 3, the same lens 1 is available for taking the photograph. 5 is the
ordinary focussing hood as used in double focussing cameras.
The upper part or half 4 of the camera is removeable and the slide 2 also being
removed, the remaining portion of the framing and the one lens 1 constitute a
single lens hand or ordinary camera as shewn by Fig. 3. 5 and 6 are doors for
the upper
and lower parts of the camera, and these doors are shewn partly open.
The cost of production of the improved camera, as also the space occupied, are
greatly reduced.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what we
claim is :-
(1) A camera having an additional focusing box and a lens carried in a slide so
as to be available for focusing and afterwards exposing as herein described and
substantially as illustrated by Figs. 1 and 2 of the accompanying drawings.
(2) A camera divisable into two parts and provided with one lens which may be
used with the two parts combined or with one part only as an ordinary camera as
herein described and substantially as illustrated by the annexed drawings.
Dated this 11th day of February 1898.
ROBERT LIONEL FOSTER.
ALWYN FOSTER.
By their Agents:
Brierley & Howard,
Penny Bank Chambers, Halifax.