Improvements in or connected with Photograph Enlarging-cameras,
Year: 1899

page_text: Improvements in or connected with Photograph Enlarging-cameras,
I, ALOYS STALINSKI, of Emmendingen, Baden, in the German Empire, Merchant,
do hereby declare the nature of this invention to he as follows:-
-
This invention relates to improvements in photographic enlarging-cameras, the
said improvements comprising an illuminating apparatus and an arrangement
whereby the front part of the camera is made independent of the camera box in
such a manner that the latter can also be employed for ordinary direct photo-
graphic purposes, the advantage also being obtained that the lens of the camera
is exchangeable.
In enlarging-cameras it was for some time the practice to obtain the necessary
regular illumination of the negative during daytime by means of free daylight
or by the employment of a condenser (collecting lens), this arrangement, however,
giving rise to the disadvantage that no work could be done in the evening or in
an ordinary room.
Now these disadvantages are obviated according to this invention by fitting
directly to the negative carrier of the camera a reflector having a source of light
and arranged to be easily detached. With this arrangement the operator can at
any time and place easily and conveniently prepare enlargements of small pictures
previously taken with the camera.
In carrying out the invention I advantageously provide illuminating apparatus
of a curved or somewhat reniform shape the inside of the front of which forms
a reflector. At the back and laterally there are provided light chambers whilst
in the middle there is a flat neck having a groove which serves for the insertion
of a disc when the apparatus is to be employed for thin negatives, in order to
properly subdue the reflected light. The cover and the bottom of the apparatus
leave openings to the light chambers free and the neck only extends partially
into the apparatus in order to allow as many light rays as possible to fall upon
the mirror without, however, allowing them to pass directly into the said neck.
Any strong light can be employed in the light chambers as the sources of light.
Where the electric light is not available I advantageously employ magnesium
light. For suspending the bands I provide suitable hooks or the like in the
chambers.
To connect the illuminating apparatus to the negative carrier of the camera
the former can be furnished with two eyes or the like.
The apparatus is employed as follows, that is to say, assuming that the negative
carrier, the lens holder and the lens are fitted in position and the bellows secured
to the lens carrier, the negative (with the film side turned to the lens) which
is to be enlarged is pushel under the springs of the negative carrier and finally
the illuminating apparatus is suspended by means of the two eyes to the hooks
provided on the negative carrier and the apparatus is then ready for use.
the necessary magnesium bands or strips have been suspended in the illuminat-
ing chambers and the silver bromide paper to be employed arranged in the back
of the camera, the two magnesium bands are ignited the rays of light proceeding
After

page_text: from the light chambers striking against the reflector and being reflected evenly
upon the negative so that a regularly illuminated picture is obtained.
By my device it is also possible to illuminate separate portions of the plate
more or less strongly and thereby to bring out particular parts in enlargements
more or less markedly so as to produce good light effects. To this end more
magnesium light is burnt before the denser parts of the plate, for example in the
case of landscapes, the negative is so introduced that the mostly denser sky is
more fully illuminated by the magnesium bands than the other parts.
T
1
1 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
Improvements in or connected with Photograph Enlarging-cameras.
I, ALOYS STALINSKI, of Emmendingen, Baden, in the German Empire, Merchant,
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 improvements in photographic enlarging-cameras, the
said improvements comprising an illuminating apparatus and an arrangement
whereby the front part of the camera is made independent of the camera box in
such a manner that the latter can also be employed for ordinary direct photo-
graphic purposes, the advantage also being obtained that the lens of the camera
is exchangeable.
In enlarging-cameras it was for some time the practice to obtain the necessary
regular illumination of the negative during daytime by means of free daylight
or by the employment of a condenser (collecting lens), this arrangement, however,
giving rise to the disadvantage that no work could be done in the evening or in
an ordinary room.
Now, these disadvantages are obviated according to this invention by fitting
directly to the negative carrier of the camera a reflector having a source of light
and adapted to be easily detached. With this arrangement the operator can at
any time and place easily and conveniently prepare enlargements of small pictures
previously taken with the camera.
In the accompanying drawing:-
Figure 1 is a plan of a reflector made according to the invention:
Figure 2 is a front view:
Figure 3 is a horizontal section of the same; and
Figure 4 is a sectional view drawn to a smaller scale shewing the apparatus
fitted to a camera.
The illuminating apparatus A is advantageously made of a curved or somewhat
reniform shape the inside of the front a of which forms a reflector. At the hack
and laterally there are provided light chambers b. c whilst in the middle there
is a flat neck d having an internal groove or fold e which serves for the insertion
of a disc when the apparatus is to be employed for thin negatives, in order to
properly subdue the reflected light. The cover f and the bottom g of the appa-
ratus leave openings to the light chambers b and c free (see Figure 1) and the
neck only extends partially into the apparatus, that is to say, as far as d',
Figure 3, in order to allow as many light rays as possible to fall upon the mirror
without passing directly into the said neck.
.
Any strong light can be employed in the light chambers b and c as the sources

page_text: of light. Where electric light is not available I advantageously employ mag-
nesium light. For suspending the bands I provide suitable hooks or the like
in the chambers, such as h, i, shewn in Figure 1.
To connect the illuminating apparatus to the negative carrier k. (Figure 4) of
the camera the former can be furnished with two eyes or the like 7 and m.
The apparatus is employed as follows, that is to say, assuming that the nega-
tive carrier k, the lens holder and the lens are fitted in position and the
bellows secured to the lens carrier 1, the negative (with the film side turned
to the lens) which is to be enlarged is pushed under the springs of the negative
carrier k, the illuminating apparatus A is suspended by means of the two
eyes 7,m to the hooks provided on the negative carrier and the apparatus is
then ready for use. After the necessary magnesium bands or strips have been
suspended in the hooks h and i in the illuminating chambers b and c and the
silver bromide paper to be employed arranged in the back of the camera, the
two magnesium bands are ignited, from below, the rays of light proceeding from
the light chambers band striking against the reflector and being reflected
evenly upon the negative so that a regularly illuminated picture is obtained.
By my device it is also possible to illuminate separate portions of the plate
more or less strongly and thereby to bring out particular parts in enlargements
more or less markedly so as to produce good light effects. To this end more
magnesium light is burnt before the denser parts of the plate; for example in the
case of landscapes, the negative is so introduced that the mostly denser sky is
more fully illuminated by the magnesium bands than the other parts.
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. The combination with an enlarging-camera of illuminating apparatus com-
prising a reflector having a source of light and adapted to be detachably fitted
to the negative carrier, substantially as hereinbefore described.
2. Illuminating apparatus of the kind described in Claim 1, comprising a
curved reflector having two light chambers from which the rays of light stream
to the reflector which projects them, regularly diffused, backwards to the photo-
graphic plate of the camera, substantially as heroin before described and
illustrated.
3. Illuminating apparatus constructed substantially as hereinbefore described
and illustrated in the accompanying drawing.
Dated the 21st day of Tenn 1 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.