Improvements in Photographic Cameras.
Year: 1894

page_text: Date of Application, 10th Apr., 1894
Complete Specification Left, 9th Jan., 1895-Accepted, 9th Feb., 1595
PROVISIONAL SPECIFICATION.
Improvements in Photographic Cameras.
I, HENRY SHIELDS, of 4 Rose Terrace, Perth, Manufacturer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in what are known as detective or hand
cameras, and has for its object to dispense with the finder used in the present
cameras, and to reflect the image of the object to be photographed on a white
screen, on a focal plane shutter, or any extra shutter which might be introduced in
front of the sensitive medium.
In carrying my invention into practice I fix on the front side of the shutter a
white screen, or the shutter itself may be made of a white material, and the image
of the object to be photographed is seen on this white surface by looking through
an opening on the top part of the camera box. In front of the lens for photo-
graphing I have an extra lens so arranged that when the exposure is to be made
by touching a knob or other suitable device the extra lens falls clear of the other,
and coming in contact with a lever automatically raises the shutter and the
exposure is made. This extra lens is required to shorten the focus of the principal
lens so that the image is sharply in focus on the white screen which is half inch or
thereby in front of the sensitive plate or medium.
As an alternative method of getting over the difficulty of the difference of focus
on shutter screen and plate the lens may be pushed back or so after focussing,
and thus bring into focus of plate, and then the exposure is made.
I also provide a suitable arrangement to prevent any light from getting into the
camera through the opening at the top when the exposure is being made.
Dated this 9th day of April 1894.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents.
Improvements in Photographic Cameras.
I, HENRY SHIELDS of 4 Rose Terrace, Perth, North Britain, Manufacturer,
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 :—
My invention relates to improvements in what are known as detective or hand
cameras, and has for its object to dispense with the finder and reflector used in the
present cameras, and project the images of the object to be photographed on the
blind or screen of a focal plane or other shutter, or any extra shutter which might
be introduced in front of the sensitive medium.
In order that my invention may be properly understood and readily carried into
effect, I have hereunto appended one sheet of drawings, in the several figures of
which corresponding parts are marked with the same letters of reference.
Figure 1 is a side elevation of a camera shewing my improvements.
Figure 2 is a front vinto

page_text: Figure 3 is a plan of the camera box, shewing the opening in the box to be
hereinafter described.
Figure 4 is a detached view of the shutter.
In carrying my invention into practice, I fix on the front side of the shutter A
a white or colored screen B, or the shutter itself may be made of a white or
colored material, and the image of the object to be photographed is seen on this
surface B by looking through an opening C on the top part of the camera box D.
In front of the lens E for photographing I have an extra lens F connected to a
lever G, pivoted at H, and at the end of this lever G there is a notch I in which
there rests the end of another lever J pivoted to the slide K, and, which latter.
lever J, by means of a small. spring L retains the extra lens F in front of the
principal lens E, as shewn in the drawings. This extra lens F is required to
shorten the focus of the principal lens E so that the image, is sharply in focus on
the white or colored screen B, which is half inch or thereby in front of the sensitive
plate or medium.
To one side of the box D there is pivoted a lever M to which is connected two
other levers N, O, respectively the lever N being connected to a small lever P
communicating with the pawl R, which releases the shutter A when the exposure
is to be made; while the other lever O is connected to the cover S of the opening C
by means of the rod Q.
When the exposure is to be made, after having seen the object to be photo-
graphed on the white or colored screen B by looking through the opening Con
top part of box D as already described, by touching the lever J the extra lens F
falls clear of the principal lens E, and the end of the lever G coming in contact
with the lever M by means of the other levers O, N, automatically closes the
opening C and raises the catch on release of shutter A, and the exposure is
made.
I also provide a suitable arrangement such as W to prevent any light from
getting into the camera through the opening C at the top to facilitate focussing.
As an alternative method of getting over the difficulty of the difference of focus
on shutter screen and plate the lens may be pushed back half inch or so after
focussing, and thus bring into focus of plate, and then the exposure is made.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manuer the same is to be performed, I declare that what I
claim is :-
1. In photographic cameras, dispensing with the finder or reflector presently
used and projecting the image of the object to be photographed on the blind or
screen of a shutter working in front of the plate or other sensitive medium,
substantially as described and shewn on the drawings.
2. In photographic cameras, a minor second lens pivoted in frout of the
principal lens to drop before exposure is made, so that the picture may be in sharp
focus on the plate or other sensitive medium, substantially as described and shewn
on the drawings.
Dated this 8th day of January 1895.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Agents: