Improvements in and connected with Apparatus for Developing Photographs and Charging Photographic Slides or Frames.
Year: 1898

page_text: Improvements in and connected with Apparatus for Developing
Photographs and Charging Photographic Slides or Frames.
PAUL DONNY, of 42, Boulevard Bonne-Nouvelle, Paris, in the Republic of
France, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved photographic apparatus for the convenient
charging of photographic frames and development of photographic plates.
The invention consists of an apparatus in two parts the one a base part and the
other a vertical part which when the apparatus is not in use may be caused to
be secured one to the other for convenient carriage. The vertical part is hinged
to the base part so as to be capable of being uplifted into a vertical position
perpendicular thereto the vertical part being secured in that position by means
of struts laterally placed.
The parts of the apparatus are connected together by means of a light-proof
covering which when the vertical part of the apparatus is uplifted into its
vertical position is stretched out so as to form triangular flexible sides and an
inclined upper surface. Upon this upper surface a piece of glass colored so as
to be proof to actinic rays is fixed while upon the under side of this inclined
surface a screen is provided to slide or to be adjusted into any position so as
to entirely cover the under face of the glass or partially cover it by manipulation
from within the apparatus. Upon the upper edge of the vertical part an ocular
glass or plate is provided through which the interior of the apparatus may be
viewed while immediately beneath a door is provided to permit of the introduction
of the frames baths and plates to be used. Upon each side of this door apertures
are formed. for the introduction of the forearms, these apertures having connected
thereto sleeves which are caused to encircle the arms of the operator so as to
preclude the passage of light while permitting of the forearms being moved
within the apparatus for the manipulation of the frames and plates therein.
A cover or cloth is placed over the upper part of the apparatus and over the
head and shoulders of the operator so as to exclude light from penetrating
through the ocular glass into the chamber. The plates to be operated upon and
the bath and frames are introduced through the door and the screen or curtain
is drawn in front of the colored glass provided upon the inclined flexible
cover.
SO
For the purpose of convenience in the manipulation of the plates the
developing basin may be provided with a transparent bottom and a cover
having a mirror provided therein that on the cover with its mirror
being placed upon the bottom of the chamber the light that 15
permitted to pass, through the colored glass in the inclined flexible cover

page_text: is reflected by the mirror through the transparent bottom of the developing basin
so that the phases of development can be thus conveniently observed.
1 13
1
CL 1900
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and 5
13, Temple Street, Birmingham, Agents.
Improvements in and connected with Apparatus for Developing
Photographs and Charging Photographic Slides or Frames.
I, PAUL DONNY, of 42, Boulevard Bonne-Nouvelle, Paris, in the Republic of
France, 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:-
This invention relates to an improved photographic apparatus for the convenient
charging of photographic frames and development of photographic plates.
The invention is illustrated in the accompanying drawings, in which,
Figure 1 is a perspective view of my improved portable dark chamber closed and
ready for transport.
Figure 2 is a perspective view of my improved portable dark chamber extended
and ready for use.
Figure is a part sectional side elevation of my improved portable dark
chamber, while in use.
Figure 4 is a perspective view of my developing dish constructed with a trans-
parent bottom, while,
Figure 5 is a perspective view of the cover for said developing dish with a
mirror provided therein.
The invention consists as illustrated in the drawings of an apparatus in two
parts the one a base part A and the other a vertical part A¹ which when the
apparatus is not in use may be caused to be secured one to the other for convenient
carriage by latches a. The vertical part A is hinged to the base part A¹ so as
to be capable of being uplifted into a vertical position perpendicular thereto the
vertical part A being secured in that position by means of struts c laterally placed.
The parts of the apparatus are connected together by means of a lightproof
covering such as American cloth, velvet, or the like which when the vertical
part of the apparatus is uplifted into its vertical position is stretched out so as
to form triangular flexible sides and an inclined upper surface. Upon this upper
surface a piece of glass B colored, so as to be proof to actinic rays is fixed while
upon the under side of this inclined surface a screen J is provided to slide or
to be adjusted into any position so as to entirely cover the under face of the glass
or partially cover it by manipulation from within the apparatus. Upon the
upper edge of the vertical part an ocular glass or plate C is provided through
which the interior of the apparatus may be viewed while immediately beneath
a door D is provided to permit of the introduction of the frames, baths and plates
to be used. Upon each side of this door apertures are formed for the intro-
duction of the forearms, these apertures having connected thereto sleeves E¹
which are caused to encircle the arms of the operator so as to preclude the passage
of light while permitting of the fore arms being moved within the apparatus
for the manipulation of the frames and plates therein.
A cover or cloth G is placed over the upper part of the apparatus and over the
head and shoulders of the operator so as to exclude light from penetrating through

page_text: the ocular glass into the chamber. The plates to be operated upon and the bath
and frames are introduced through the door D and the screen or curtain Jis
drawn in front of the colored glass B provided upon the inclined flexible cover d.
For the purpose of convenience in the manipulation of the plates the developing
basin H Figure 4 may be provided with a transparent bottom and a cover
Figure 5 having a mirror i provided therein so that on the cover with its mirror
being placed upon the bottom of the chamber the light that is permitted to pass
through the colored glass B in the inclined flexible cover d is reflected by the
mirror through the transparent bottom of the developing basin H so that the
phases of development can be thus conveniently 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 what
I claim is:-
1. An improved photographic apparatus consisting of a base and vertical part
hinged one to the other having extended between them a lightproof covering
provided with a colored glass capable of being covered or uncovered by means of
a screen, the vertical part being provided with apertures to which sleeves are
secured as also an aperture closed by a door while the vertical part is also provided
with an ocular glass or glasses through which the interior inay be viewed sub-
stantially as and for the purposes described.
2. In a photographic apparatus such as herein before described the use of a
developing basin having a transparent bottom which has a cover having a mirror
provided thereupon for the purposes and substantially as described.
3. An improved photographic apparatus substantially as and for the purposes
hereinbefore described and illustrated.
h day of April 1
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.