Improvements in Photographic Cameras.
Year: 1898

page_text: Improvements in Photographic Cameras.
ALBERT JOHN EVES HILL, 13, Haverfield Gardens, Kew, Surrey, and "PHOTO,"
LIMITED, 72 and 74, Grays Inn Road, London, W.C., do hereby declare the nature
of this invention to be as follows:-
The improvement consists essentially in attaching a blind shutter of peculiar
construction to a reflector, so that a full size image may be seen up to the moment
of exposure, on the focussing screen which is on the top of the camera, and of
the box form. The reflector is pivoted at one end and free to move from a
position parallel to the focus screen, to an angle of 45 degrees.
At the top and bottom of the camera, and in a plane with the back of the
lens, a spring roller is fixed, each pulling in contrary directions. The top roller
will have means whereby an increased tension may be given by winding.
A blind is attached to these rollers, and is pierced by an oblong opening twice
as long as it is broad, and the free end of the pivoted reflector is attached to the
blind, so that one half the blind is above the reflector and one half below.
Hanging from the top of the camera, inside, and in the same plane as the
roller blind, is a small piece of opaque fabric-(this may with advantage be
weighted) which reaches to the opening in the blind, and acts as a cut off when
the reflector is released and the blind in motion.
The camera is set for exposure by drawing down the reflector by means of a
pin piercing a slot in the side, or other simple means, such as a piece of string
attached to the free end of the reflector may be used. For time exposures some
simple means to catch the pin when the reflector is at an angle of about 30 degrees
will be used.
Dahi Want dave of January 1898
Improvements in Photographic Cameras,
ALBERT JOHN EVES HILL, 130, Amyand Park Road, Twickenham, Photo-
graphic Expert, late of 13, Haverfield Gardens, Kew, and "PHOTO
LIMITED,
72 and 74, Grays Inn Road, London, W.C., Alfred Allen Barratt, Managing
Director, 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 improvement consists essentially in attaching a blind shutter of peculiar

page_text: construction, marked A in drawings, to a reflector, so that a full size image may
be seen up to the moment of exposure, on the focussing screen B', which is on
the top of the camera and of the box form.
The reflector is hinged or pivoted at one end and free to move from a position
parallel to the focus screen to an angle of 45 degrees.
At the top and bottom of the camera, and in a plane with the back of the
lens, spring rollers are fixed, (marked D in drawings) each pulling in contrary
directions.
The top roller will have means whereby an increased tension may be given
by winding.
A blind marked A in drawings, is attached to these rollers, which is pierced
by an opening marked F, and the free end of the pivoted reflector B, is attached
to the blind, so that one half the blind is above the reflector, and one half below.
(Drawings 1 & 2.)
Drawing No. 2, shows the shutter when at about an angle of 30 degrees, and
the construction preferred of roller and blind, but it is obvious, that two separate
blinds with apertures, affixed at edge of reflector, would answer equally well.
To obviate any chance of light penetrating the top aperture, a small blind
of opaque fabric may be hung from edge of focus screen, marked H.
The camera is set for exposure, by drawing down the reflector by means of a
pin piercing a slot in the side, and affixed to the mirror, or preferably the pivot
would pierce the side of the camera at point C, and be attached to a lever working
outside the camera, which is held and released by some such simple catch as
shown in Drawing 3. This catch J (Fig. 3) is a bent lever pierced by a screw
which acts as a fulcrum, and is notched so as to hold the lever K when at an
angle of 45 degrees. When the lever J is pressed on the lower end, towards the
body of the camera, the exposure is effected by the lever K being released.
When, however, the lower end of the lever J is pushed towards the front of
the camera,
the lever K is also released, but in this case, the lever J being free
to move on the screw, the upper end catches the lever K when at about an angle
of 15 degrees, checking the mirror when the lower aperture is opposite the lens,
and continues its movement when the pressure is relieved, as it is drawn out of
its path by small spring N.
To obviate vibration, the mirror may with advantage be of metal, or other
suitable material.
DESCRIPTION OF DRAWINGS.
A, blind. B, reflector. C, pivot. D, rollers. F, aperture. G, body of camera.
H, cut off. J, catch. K, lever. L, focal plane. M, lens aperture. N, spring.
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:-
:-
I. Roller blinds attached to a hinged reflector pulling in contrary directions,
and pierced with suitable apertures, as applied to photographic cameras sub-
stantially as described.
II. A cut off or flap of opaque material, substantially as described.
III. Suitable means of releasing and checking mirror by catch substantially
as described.
Cantanho 0011 1000
ALBERT JOHN EVES HILL, and
PHOTO LTD.,
ALFRED ALLEN BARRATT,
Managing Director.