Improvements in and connected with Photographic Vignetting Apparatus.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in and connected with Photographic Vignetting
Apparatus.
ARTHUR SALMON, 169 Hampstead Road, London, W. Optician and Photo-
grapher do hereby declare the nature of this invention to be as follows:-
The holder which carries vignetting card of desired size & shape is attached to
any printing frame by two metal slides, allowing the holder to be slipped on or off
& adjusted in any direction, at the same time clipping & holding it firmly in any
position. The holder which carries the vignetter is made in box form, the lid of
which is covered with thin translucent medium, defusing the light before passing
through the vignetting card, which can be changed immediately for another of
desired shape or form & placed nearer or farther from negative by means of a series
of grooves, thereby increasing or decreasing the angle of light passing through
vignetter, the light defuser in form of box lid being placed on, the frame is ready
for vignetting.
000
ARTHUR SALMON.
COMPLETE SPECIFICATION.
Improvements in and connected with Photographic Vignetting
Apparatus.
I, ARTHUR SALMON 169 Hampstead Road London, W. Optician and Photo-
grapher 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 this invention is to simplify vignetting photographs and consists of
an apparatus in box form, the base of which extends beyond the sides and is slipped
off and on any printing frame by means of two aluminium slides screwed to sides of
said frame, allowing of adjustment up and down or sideways and remaining firmly
clipped in any position and effectually preventing light reaching negative other
than by opening in card. At each end of box is a series of grooves by which the
vignetting card with opening of desired size and shape can be placed at different
distances from negative and at an angle, thereby increasing or decreasing angle of
light passing through vignetting card according to requirements of subject on
negative from which the desired vignetted print is to be obtained. This vignetting
card can be immediately changed for another with different size and shape opening
at will of operator, and not required to be serrated, which enables him to quickly
cut a desired shape in another card and replace same.
The lid of apparatus is a light diffuser, the top being made of translucent medium,
can be placed on and off at will, is independent of vignetting card and not in contact
with it, giving the advantage of being able to see negative, determining the size and

page_text: shape of opening in vignetting card, the distance from and position over negative
and is put on after printing out paper has been placed in printing frame with
negative, and all subsequent adjustments made, is at a distance from and does not
come in contact with vignetting card, whereby the light is thoroughly diffused and
produces a soft and graduated vignette print.
In case of dense negative or bad weather this diffuser can be dispensed with, or
brought into use at will without gumming or sticking.
In the accompanying drawings, which represent an apparatus constructed
according to my invention
Sheet 1 Figure 1 shows a front view of complete apparatus in connection with
printing frame.
P. is printing frame.
B. Box for holding vignetting cards.
D. The lid of box, which is a light diffuser.
E. Extended base of box.
V. Vignetting card.
Figure 2. is a side view of Figure 1.
G. G. Grooves at each end of box.
D is translucent medium.
V. Vignetting card.
M. Aluminium slide.
Sheet 2 Figure 3. Section through C. D of Figure 1 Sheet 1.
Figure 4. Section through A. B of Figure 1. Sheet 1.
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 means of adjustably securing a vignetting apparatus of box like form to
a printing frame, the said means consisting of an extended base or flange on the
vignetting apparatus and of slide-ways on the printing frame whereby the said
apparatus can be readily slipped on and off the said frame and adjusted endways
or sideways as required while any light is prevented from reaching the negative
except through the opening in the vignetting card, substantially as herein before
described.
2. In a vignetting apparatus of box-like form a series of grooves at the ends or
sides to receive the edges of the vignetting cards, whereby the cards can be readily
adjusted to the required distance from the negative and at any angle relatively
thereto, substantially as and for the purposes herein before described.
3. In a vignetting apparatus, a translucent or light diffusing lid which can be put
in place and removed independently of the vignetting card with which it does not
come in contact, substantially as and for the purposes hereinbefore described.
4. The improved vignetting apparatus constructed substantially as hereinbefore
described and represented in the accompanying drawings.
4th September 1896
ARTHUR SALMON...