Improved Photographic Magazine Changing Box for Plates and Films with Roller Slide Shutter.
Year: 1892

page_text: Date of Application, 1st Apr., 1892
Complete Specification Left, 6th Jan., 1893-Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION.
Improved Photographic Magazine Changing Box for Plates and
Films with Roller Slide Shutter.
I CARL GRUNDMANN of Leipzig in the Kingdom of Saxony German Empire,
Nicolai Strasse 41 Merchant, do hereby declare the nature of my invention for
"IMPROVED PHOTOGRAPHIC MAGAZINE CHANGING BOX FOR PLATES AND
FILMS WITH ROLLER SLIDE SHUTTER "to be as follows:-
This magazine changing box is provided with a plate-changing-device which
renders it possible to use the same, as other ordinary dark-slides, direct with the
camera and also allows the same to remain fixed to the camera during the
changing of the plates, that is, while transporting the exposed front plate to
the rear.
The changing of plates is greatly facilitated by employing my invention.
A further improvement relates to the arrangement by means of which the slide
or shutter, which serves for exposing and also for changing the plates, moves in a
semicircle round the box forming the plate-magazine and for that reason does not
protrude from the apparatus during the use of the same.
It is furthermore very advantageous to employ a light tight bag fixed to the
box for temporarily holding the plate during the changing, as the same folds close
to the box when not in use.
A great saving of space and a very compendious form is the result.
The connection between the box forming the magazine and the attached bag is
formed by two slots made in one of the side walls, one of the slots being towards
the front near the shutter, the other to the rear of the last plate, both slots being
protected by the bag.
The exposition and changing of plates carried out in the following manner.
After fixing the changing box to the camera the safety spring attached to the
lid is pressed down and bolted and a roller slide-shutter moved in the direction
towards the bag.
In this manner the front plate is laid free to be exposed and at the same time
the frames, which carry the plates or films in the box, moved so far forward by
means of the pressure of a spring that the front frame will be in the focus of the
lense and in the position which the shutter has previously occupied.
If the shutter is moved in the opposite direction to the aforedescribed, when the
exposition is ended, the front frame with the exposed plate will be simultaneously
pushed through the forward slot into the bag from whence the same can be moved
by hand through the rear slot into the changing box behind the other plates.
By means of a ruby glass let into an opening of the lid the succession of the
frames which are provided with consecutive numbers can be observed.
Dated this 1st day of April 1892.
W. P. THOMPSON & BOULT,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION..
Improved Photographic Magazine Changing Box for Plates and
Films with Roller Slide Shutter.
I, CARL GRUNDMANN, of 41 Nicolai Strasse, in the City of Leipzig, in the
Empire of Germany, Merchant, do hereby declare the nature of this invention
and in what manner the same is to be. performed to be particularly described
in and by the following statement :—
This magazine-changing-box is provided with a plate-changing-device, which
renders it possible, to use the same, as other ordinary dark slides, direct with the
camera and also allows the same to remain fixed to the camera during the
changing of the plates, that is while transporting the exposed front plate to
the rear.
The changing of plates is greatly facilitated by employing my invention.
A further improvement relates to the arrangement by means of which the slide
or shutter which serves for exposing and also for changing the plates, moves in a
semicircle round the box forming the plate-magazine and for that reason does not
protrude from the apparatus during the use of the same.
It is furthermore very advantageous to employ a light tight bag fixed to the
box for temporarily holding the plate during the changing, as the same folds close
to the box, when not in use.
A great saving of space and a very compendious form is the result.
The connection between the box forming the plate magazine and the attached
bag is formed by two slots made in one of the side walls, one of the slots being
towards the front near the shutter, the other to the rear of the last plate, both slots
being protected by the bag.
Fig. 1 represents the changing box and bag with the lid closed and the bag
folded on to the box.
Fig. 2 is a like view with extended bag and the shutter opened.
Fig. 3 is a like view with the shutter nearly closed and a plate transported into
the extended bag.
Fig. 4 is a like view showing the plate in the position ready to be pushed back
into the box after exposure.
The exposition and changing of plates is carried out in the following manner :-
After fixing the changing-box in the camera, the safety spring i attached to the
lid g is passed down and bolted, and a roller slide-shutter e moved in the direction
towards the bag.
In this manner, the front plate is laid free to be exposed and at the same time
the frames c which carry the plates or films in the box a moved so far forward by
means of the pressure of a spring d, that the front frame will be in the focus of
the lense and in the position which the shutter has previously occupied.
If the shutter is moved in the opposite direction to the aforedescribed, when
the exposition is ended, the front frame with the exposed plate will be simul-
taneously pushed through the forward slot into the bag 6 from whence the same
can be moved by hand through the rear slot into the changing box behind the
other plates.
By means of a ruby glass let into an opening of the lid, the succession of the
frames which are provided with consecutive numbers can be observed.
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 I am
aware of the Specification of Letters Patent No. 8329 of 1886 granted to Arthur
Samuel Newman, and I wish it to be understood that I do not claim anything
described and claimed therein; but what I claim is :-
1.) A magazine-changing-box characterized thereby, that the roller slide-
shutter e moving around the box forming the magazine will at each closing of the

page_text: shutter move the exposed plate into a light tight bag from which the same can be
inserted by the hand through a slot into the magazine box to the rear of the
other plates as substantially described in the foregoing Specification and shown in
the accompanying drawing.
2.) My improved photographic magazine-changing-box for plates and films
with venetian-blind-like shutter substantially as described and shown in the
drawing.
1
CARL
GRUNDMANN.
W. P. Thompson & Boult,
· Agents for the Applicant.