An Improved Photographic Developing Apparatus.
Year: 1892

page_text: Date of Application, 28th Mar., 1892
Complete Specification Left, 27th June, 1892-Accepted, 30th July, 1892
PROVISIONAL SPECIFICATION.
An Improved Photographic Developing Apparatus.
I, ARTHUR BRIN of 1, Charlton Villas, Park Road, Twickenham, in the County
of Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to a photographic developing box whereby negatives or
positives may be developed. in the open, without recourse to the ordinary dark room
or tent.
It consists of a narrow, upright, liquid-tight box provided with non-actinic
transparent sides to enable the development to be watched, and combined with
means whereby the developing and washing liquids may be quickly introduced and
withdrawn in succession, cach liquid being for this purpose contained in a separate
elastic pneumatic bulb or pump barrel connected by a flexible or other tube with
the lower part of the box, a clip or other means of interrupting the flow through
the pipe being provided to enable the solution to be held in reserve or kept in action
as long as may be required.
The inlet of the box at which the negative or positive is introduced is surmounted
by a chamber with which the dark back of the camera is adapted to make a light-
tight joint, the interior of the chamber being of such shape as to guide the negative
or positive through the inlet of the developing box, in whatever position it be
delivered from the dark slide.
A lifter of clear transparent celluloid is provided, in which the negative or positive
is held during development and subsequent operations and by which it may be readily
withdrawn when completed.
The dark back is provided with a door or slide opening into the said chamber at
which the negative or positive may be dropped or slid on to the inclined guides
leading to the developing box, and means are provided for ensuring correct register
of the said door or slide with the box-inlet.
By the employment of the pneumatic bulbs, the liquids are not run to waste but
are automatically withdrawn from the box and returned to their proper reservoirs
for re-use as often as may be required, thus avoiding the necessity of replenishing
after each development and of carrying a supply for that purpose.
Dated this 28th day of March 1892.
זיזות
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.
COMPLETE SPECIFICATION.
An Improved Photographic Developing Apparatus.
I, ARTHUR BRIN of 24, Park Road, Twickenham, in the County of Middlesex,
Engineer, 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 a photographic developing box whereby photographs
may be developed in the open without recourse to the ordinary dark room or
tent.
.
Reference is to be had to the accompanying drawings, forming part of this
Specification, wherein
Figure. 1 is a front elevation, Figure 2 a central vertical section on line 1-1.
077

page_text: Figure 1, and Figure 3 a plan partly in section, of the developing chamber
complete.
Figure 4 is an elevation of the lifter.
The same letters of reference denote like parts: in; all the figures.
The apparatus comprises a narrow upright liquid-tight box A provided with non-
actinic transparent glass panels a a in its two opposite broad sides (protected by
pivoted shutters a¹) to enable the development.to.be.watched. With, said box are
combined means whereby the developing and washing liquids may, respectively be
quickly introduced and withdrawn; the liquids being for this purpose contained in
elastic bulbs B and C respectively connected by flexible tubes bc with the central
tube entering the lower part of the box A. The box A is surmounted by a chamber D
which in the example shewn is of: circular form;.it: being. intended for use with a
pocket camera in which circular. disc films: are used,. the dark: back: E being.
therefore of circular form and adapted to serve as a cover for, and to make a lights
tight joint with; the top of box D: The sectionaliform.of: the chamber D would of
course correspond to the form of the dark: back andlittis of such shape internally, as
to cause the photograph to assume a. vertical; position andi guide it down into the
developing box in whatever position it may be delivered: from the dark back E.
A lifter F (Figure 4) of clear. transparent celluloid is placed in the developing
box A in which the photograph is held. during development and. subsequent
operations and by which it may be readily withdrawn: when completed. The dark
back E is provided with a hinged door which is opened by a spring when a catch e
is released, the door opening downwards from the underside of the dark back so as
to drop the photograph to be developed on.to.the inclined guides d d'in chamber D
leading to the developing box: Instead of a hingedidoor. the dark back might have
a sliding shutter, and in either case the socket of the catch-bolt e which project from
opposite sides of the dark back, is received in notches in the.edge of chamber Diso
that the photograph in falling on to the guides de will be in proper position to be
guided down edgewise and will not be liable to bridge across the space between: the
two guides d. By the employment of the self-expanding. bulbs B, C, the liquids
are not run to waste but each is automatically withdrawn: from the box A and
caused to return to its proper reservoir for re-use as often as may be required, thus
avoiding the necessity of replenishing after each development. Each bulb rests in
a ring support g and each tube b and c is inserted in a spring clip h whose two jaws
may be closed and locked together by a latch. h. the rings. g and clips being
mounted at opposite narrow. sides of the box A.
The mode of using the apparatus is as follows::-The bulbs B, C, being respectively
filled with the developing and washing liquids and thei tubes b, c, inserted. in, and
throttled by, their clips h, the dark back: E containing the photograph to be
developed is applied on top of the chamber D, the door opened, and the photograph
dropped into the lifter F., The clip of the tube is then released, the bulb B
pressed to cause the developer to pass into and. fill.the box A. The tube is then
again throttled by its clip thus keeping the bulb B collapsed and preventing the
return of the developer. When the development is complete, the tube b is again
unthrottled and the bulb B allowed to expand, thus causing the developer in the
box A to be withdrawn into the bulb.B. The same.operation. is then gone through
with the bulb C which contains water. The plate. is then ready for fixing which
may be performed by transferring it to a separate receptacle of any suitable kind
containing the fixing bath, only ordinary precautions now being requisite to protect
the developed plate from daylight.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner. the same is to be.. performed,. I declare that what I
claim is :-
1. The herein described photographic developing apparatus consisting in. the
combination, with the upright box A having transparent non-actinic panels and
surmounted by the chamber D with guides leading down to the inlet of the box:A.

page_text: of the elastic bulbs B, C, to contain the developing and washing liquids, connected
with the lower part of the box A, as specified.
2. The herein described photographic developing apparatus consisting in the
combination, with the upright box A having transparent non-actinic panels and
surmounted by the chamber D with guides leading down to the inlet of the box A,
of the elastic bulbs B, C, to contain the developing and washing liquids, connected
with the lower part of the box A, as specified, and of the clips h adapted to throttle.
the tubes b, c, in the manner and for the purpose specified.
3. The herein described photographic developing apparatus consisting in the
combination, with an upright box A having transparent non-actinic panels and
connected at the lower part by tubes with flexible bulbs B, C, containing the
developing and washing solutions and surmounted by a chamber D leading down
into the said box A, of a camera dark back adapted to fit light-tight upon said
chamber D and provided with a door at the underside at which to deliver the
photograph from the dark back to the developing chamber, as specified.
4. A. photographic developing apparatus constructed substantially as described
and shewn in the drawings.
Dad 11.
T
1003
By A. M. & Wm. Clark,
A. BRIN,
53, Chancery Lane, London, Chartered Patent Agents.