Improvements in Photographic Dry-plate Holders.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Photographic Dry-plate Holders.
I, JACOB SCHAUB, of 218, F Street, Salt Lake City, in the County of Salt Lake,
State of Utah, United States of America, Photographer, do hereby declare the
nature of this invention to be as follows:-
The object of my invention is to provide an improved construction of photo-
graphic plate holder which will allow of the insertion and removal of plates with
greater ease and celerity than heretofore, and by which the plates shall be more
securely held in place so that they shall be in no danger of being dislodged by
jolting in travelling or otherwise. To these ends I provide the frame of the
plate holder with a movable or hinged part or section which is arranged at the
end opposite the slide entrance. When the slide is fully inserted or closed it
engages with and locks the said movable section which by slightly overlapping
the sensitive plate holds it securely in place. The details of construction and
operation of the invention are hereinafter described with reference to a double
plate holder, and since the two sides of the double or two-plate holder are dupli-
cates, it will obviously be necessary to describe but one.
In
The rigid or fixed portion of the rectangular frame is composed of two side
pieces or sections having the usual groove in their inner sides and two end pieces
or sections, one of which end pieces has a slot to receive the slide or shutter, and
the main feature of novelty consists in hinging to the opposite fixed end piece
another end piece or section which may be opened to allow more convenient
insertion and removal of the dry plate. Such end piece or section is secured
to the fixed end piece or section of the frame by means of a flexible strip which
is secured to the outer sides of the respective parts by any suitable means.
some instances, more particularly in the case of large plate holders, the attachment
may be made by means of metal hinges. The hinged section has an interior
groove to receive the end of the slide whereby it is locked securely in the closed
position. The fixed frame section is cut away or rabbetted on its upper side to
form a shoulder for engagement with a corresponding shoulder of the hinged
section so that when the latter is in the closed position it will be prevented from
moving laterally or outward.
It will be evident that when the slide or shutter is withdrawn and the hinged
section opened, a dry plate can be easily inserted and moved underneath a pro-
jection at the slotted end of the holder. Upon closing the hinged section it
overlaps the other end of the dry plate and when the slide is re-inserted and
fully closed it enters the groove in said hinged section and locks it in such closed
position.
When the holder has been inserted in a camera and the slide withdrawn pre-
paratory to an exposure, the pressure on the movable frame section, which is
necessarily incident to its position in the camera, will prevent it opening.
To unload the plate-holder the slide is drawn, the hinged section opened, the

page_text: cut-out portion or arch of the fixed end section allowing easy access to the adjacent
edge of the plate.
Dated this 19th day of October 1897.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.
Improvements in Photographic Dry-plate Holders.
I, JACOB SCHAUB, of 218, F Street, Salt Lake City, in the County of Salt Lake,
State of Utah, United States of America, Photographer, 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 object of my invention is to provide an improved construction of photo-
graphic plate holder which will allow of the insertion and removal of plates with
greater ease and celerity than heretofore and by which the plates shall be more
securely held in place so that they shall be in no danger of being dislodged by
jolting in travelling or otherwise.
To these ends, I provide the frame of the plate holder with a movable or hinged
part or section, which is arranged at the end opposite the slide entrance. Whe
the slide is fully inserted or closed, it engages with, and locks, the said movable
section, which by slightly overlapping the sensitive plate holds it securely in place.
The details of construction and operation of the invention are as hereinafter
described, reference being had to the accompanying drawing, which represents
a double plate holder.
Figure 1 is a perspective view of a complete plate holder, the slide or shutter
being shown partly withdrawn:
Figure 2 is a longitudinal section of the plate holder, the slide or shutter being
shown closed;
Figure 3 is a longitudinal section of one end of the plate holder, showing the
movable section open and thrown back;
Figure 4 is a perspective view of an end portion of the plate holder, showing
the movable section open.
Since the two sides of the double or two-plate holder are duplicates, it will
obviously be necessary to describe but one.
The rigid or fixed portion of the rectangular frame is composed of two side
pieces or sections 1, having the usual lengthwise groove in their inner sides, and
two end pieces or sections 3, 4. The section 3 has a lengthwise slot to receive
the slide or shutter 5.
The main feature of novelty consists in hinging the other end piece or section 7
so that it may be opened to allow more convenient insertion and removal of the
dry plate x, Figure 2. Such end piece or section 7 is secured flexibly to the fixed
end piece or section 4 of the frame by means of a strip 8 of some flexible material,
which is secured to the outer sides of the respective parts 4 and 7, by any suitable
means. In some instances, more particularly in the case of large plate holders, the
attachment may be made by means of metal hinges.
The section 7 has an interior groove 9, to receive the end of the slide 5, as shown
in Figure 2, whereby it is locked securely in the closed position.
The fixed frame section 4 is cut away, or rabbeted, on its upper side, Figure 2,
to form a shoulder 10 for engagement with a corresponding shoulder 11 of the
hinged section 7, so that when the latter is in the closed position, as shown in
Figure 2, it will be prevented from moving laterally or outward.

page_text: It will be apparent that when the slide or shutter 5 is withdrawn and the
section 7 opened, as shown in Figures 3 and 4, a dry plate can be easily inserted
and moved underneath the projection 12, Figure 2, at the slotted end of the holder.
Then, upon closing the section 7, as shown in Figures 1 and 2, it overlaps the
other end of plate x, Figure 2; and, when the slide 5 is reinserted and fully closed,
it enters the groove 9 in said section 7, and locks it in such closed position.
When the holder has been inserted in a camera, and the slide 5 withdrawn
preparatory to an exposure, the pressure on the movable frame section 7, which
is necessarily incident to its position in the camera, will prevent it opening.
To unload the plate-holder, the slide 5 is drawn, the section 7 opened as shown
in Figures 3, 4, the cut-out portion or arch 13 of the fixed end section 4 allowing
easy access to the adjacent edge of the plate .
The invention is characterized by its adaptation for easy and rapid manipu-
lation, safe and secure fastening of the sensitive plate therein, as well as by sim-
plicity of construction and economy in manufacture.
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:-
1. A photographic plate holder having a rigid rectangular frame, one side
or end section of which is movable as specified, to allow convenient insertion and
removal of a sensitive plate.
2. A photographic plate holder composed of a rigid frame, having a hinged
end section provided with a groove in its inner side, and a shutter adapted to
slide in said frame and engage the hinged section, for locking it closed, as
specified.
3. In a photographic plate holder the combination with a rigid rectangular
frame, whose fixed end section 4 has a lengthwise rabbet, of a grooved movable
section which is hinged to such fixed section and adapted to fold upon the same,
and also engage the shoulder of the rabbet, and the slide or shutter adapted to
enter the groove of the movable section, for locking it, as shown and described.
Dated this 16th day of July 1898.
.
A. M. & WM. CLARK,