A Hand or Detective Photographic Camera.
Year: 1891

page_text: Date of Application, 8th Aug., 1891
Complete Specification Left, 7th May, 1892-Accepted, 6th Aug., 1892
PROVISIONAL SPECIFICATION.
A Hand or Detective Photographic Camera.
GEORGE FREDERICK FRAAS 18 Portland Street Commercial Road London E.
Optician do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in photographic hand or detective cameras,
whereby a number of sensitive plates or films may be successively exposed in a
simple manner. In carrying out my invention, I provide a suitable box to carry
two metal stages; each provided with a spring having a clip on the inner ends, for
the purpose of holding the ends of the metal holders provided for to carry the
sensitive plates or films. For convenience I store a number of suitable holders to
contain the sensitive plates or films, say 18 for example, and when the plates or
films are so stored they lay in a horizontal position near the top of the box. To
remove a plate or film into position for exposure, I provide a rod composed of any
suitable material and made in such a form that it will withdraw the bottom holder
containing the sensitive plate or film every time it is operated upon. And by its
movement it places the plates or films into a vertical position ready for to be
exposed. When the plates or films are in the vertical position, they are held
firmly by three or more springs or catches, each plate or film remaining in the
vertical position until the required number is exposed.
1 4
1001
GEORGE FREDERICK FRAAS.
COMPLETE SPECIFICATION.
A Hand or Detective Photographic Camera.
I, GEORGE FREDERICK FRAAS of 18 Portland Street Stepney in the County
of London Optician 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 photographic hand or detective cameras
by which a number of sensitive plates or films may be successively exposed in a
simple manner.
In carrying out my invention I provide a suitable box to carry two stages
provided with springs or catches to hold the ends of the plate or film holders when
drawn into them by the changing rod which will be hereinafter described. For
convenience I store a number of suitable holders to contain the sensitive plates or
films, say eighteen for example and when the plates or films are so stored they lay
in a horizontal position near the top of the box.
To remove or change a plate or film into position for exposure I provide a rod
composed of any suitable material and made in such a form that it will withdraw
the bottom holder containing the sensitive plates or films every time it is operated
upon and by its movement it draws or slides the ends of the plate or film holders
into the stages as above described and finally places it in a vertical position ready
for to be exposed.
The holders containing the sensitive plates or films are held firmly by three or
more springs or catches and remain in the vertical position until the required
number is exposed.
To enable my invention to be more fully and clearly understood I will describe
it from the accompanying drawings.
Figure 1 is a section of the camera shewing one side, and the improvements
according to my invention.
า

page_text: Figure 2 is a view shewing the front part of the camera shewing the form of
.shutter and release.
Figure 3 is a side view of the camera with all the working parts enclosed.
Figure shows the form of changing rod which use.
Figure 5 is an end view of the camera looking from the front shewing the ends
of the stages and the manner in which the plate or film holders are held after being
drawn into position by the changing rod.
Figure 6 is a view looking in the back of the camera shewing the changing rod
and shutter with pins attached for locking the changing rod after the shutter has
been released, which is shown by the dotted lines thereby avoiding the possibility
of exposing a plate twice.
Letters of reference indicate corresponding parts in the figures.
A A A A is the box or case of the camera.
B indicates the stages with springs or catches attached to keep the ends of the
plate or film holders from coming out again after they have been drawn into them
by the changing rod as shown in Figures 1 and 5.
C represents the changing rod the working of which will be clearly understood
by reference to Figure 1. The rod being drawn out from the bottom of the box
at the back of the camera comes in contact with the bottom plate-holder D. and
drawing it off the shelf connected with the partition E. it slides under the catches
on the stages B. and falls in the direction indicated by the dotted line and is finally
drawn behind the springs F, by the changing rod and is kept to the stage clips and
springs by a spiral spring at the back which is fastened on the door at the back of
the camera. G is a cover screwed on the bottom of the camera to keep the
changing rod down, and also to stop the light from entering at the back of the
camera.
O represents the pins on the changing rod and shutter which I have described in
the reference to Figure 6. The remaining portion represented in the figures I do
not claim they being well known, so will only just make reference to them. His
the lens. I indicates the view finders. J the spring which actuates the shutter.
K is a lever for focussing the lens. L is the shutter shewing the capping of the
lens when resetting it. M is a cord by which the shutter is reset. N levers
shewing instantaneous and time release.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
First. A photographic camera by which a number of plate holders may be
changed in the manner substantially as hereinbefore described.
Secondly. The stages by which the plate holders are lield by the springs or
catches as herein and for the purpose described.
Thirdly. The form of changing rod by which the bottom plate holder in the
horizontal position are withdrawn and changed in the vertical position substantially
and for the purpose described.
Fourthly. The manufacture and use of the improved camera hereinbefore
described and illustrated in the accompanying drawings.
Dated this 7th day of May 1892:
G. F. FRAAS,
18, Portland Street, Commercial Road, London, E., Optician.