IMPROVEMENTS IN APPARATUS FOR THE PRODUCTION OF STEREOSCOPIC AND PHOTOGRAPHIC PICTURES
Year: 1854

page_text: LETTERS PATENT to Louis François Saugrin, of Paris, in the Empire of
France, and of 4, South Street, Finsbury, London, Photographist, for
the Invention of "IMPROVEMENTS IN APPARATUS FOR THE PRODUCTION OF
STEREOSCOPIC AND PHOTOGRAPHIC PICTURES."
Sealed the 3rd November 1854, and dated the 15th May 1854.
PROVISIONAL SPECIFICATION left by the said Louis François Saugrin
at the Office of the "Commissioners of Patents, with his Petition, on the
15th May 1854.
I, LOUIS FRANÇOIS SAUGRIN, of Paris, in the Empire of France, and
of 4, South Street, Finsbury, London, Photographist, do hereby declare, the
nature of my Invention for "IMPROVEMENTS IN APPARATUS FOR THE PRODUCTION
OF STEREOSCOPIC AND PHOTOGRAPHIC PICTURES" to be as follows:-
The Invention consists in using simultaneously two similar photographic
apparatus, constructed as herein described, for taking stereoscopic photographs.
These apparatus are adjusted near to each other at the requisite angle for
obtaining the picture. A, A, Figures 1 & 2, sides in perspective of a camera
obscura; B, B, B, metallic or glass plates; E, E, E, three lenses for obtaining
three different pictures; b', 6', b', 6', horizontal partitions within the camera to
prevent the rays of light intermingling; d, d, leather bands to take out the
slide; ff, frame placed behind the camera, containing a second frame on
7

page_text: which to place the photographic plates. The lenses E, E, E, are on one side
of the camera, corresponding with the parts B, B, B, of the plates, the other
parts C, C, C, being in the shadow.
In the second apparatus, Figure 2, the arrangement of the lenses and plates
is reversed; the images obtained in the first camera on one half of the plates
being produced on the other half in the second camera, to produce complete
stereoscopic pictures.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Louis François Saugrin in the Great Seal Patent Office on
the 15th November 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, LOUIS
FRANÇOIS SAUGRIN, of Paris, in the Empire of France, and of 4, South
Street, Finsbury, London, Photographist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifteenth day of May, in the year of our Lord One
thousand eight hundred and fifty-four, in the seventeenth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Louis François Saugrin, Her special license that I, the said Louis François
Saugrin, my executors, administrators, and assigns, or such others as I, the
said Louis François Saugrin, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all times there-
after during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention of "IMPROVEMENTS IN
APPARATUS FOR THE PRODUCTION OF STEREOSCOPIC AND PHOTOGRAPHIC PICTURES,"
upon the condition (amongst others) that I, the said Louis François Saugrin,
by an instrument in writing under my hand and seal, should particularly
describe and ascertain the nature of the said Invention, and in what-manner
the same was to be performed, and cause the same to be filed in the Great
Seal Patent Office within six calendar months next and immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Louis François Saugrin, do hereby
declare the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement thereof; reference being had to. the Drawing hereto
annexed and to the figures and letters marked thereon; that is to say: -

page_text: My Invention consists in constructing photographic apparatus, and employ-
ing the same as herein-after described, for obtaining a large number of
stereoscopic and photographic pictures in a short space of time.
DESCRIPTION OF THE DRAWING.
Figure 1 represents a side view of one of the improved photographic appa-
ratus; Figure 2 shows the second apparatus, similar to the first, in the position
it should occupy with respect to the first during the operation; Figure 3 is a
front view of the same apparatus, showing the position of the lenses in tho
camera. A, A, Figures 1 and 3, camera obscura; B shows a daguercotype
plate or collodionized glass exposed to the action of the solar rays transmitted
by three objectives E, E, E; B', partitions set in the interior of the camera
to prevent the rays of light transmitted by the three double objectives E, E, E,
from intermingling; C, part of the plate not submitted to the action of the
light; D, leather loops for drawing out the slide which opens in two parts;
F, frame adapted to the exterior of the camera A, and containing another
frame with a door for receiving the daguereotype plate. G, Figure 3, three
hinged fronts supporting the objectives; H, grooved pieces fixed upon the
camera, in which the fronts G slide from right to left; I, I, hinges uniting the
three fronts and serving to give the required inclination to the objectives; J,
screw serving to regulate the inclination of the fronts G; K, spring catch
serving to fix the frame F'and the ground glass.
Figure 4 represents an apparatus for employing two lenses instead of three.
L, joint of the fronts G, lined with a black velvet or other band to prevent the
light from penetrating into the apparatus; M, support for the two fronts G, G;
N, grooves in which the fronts G, G, slide up and down.
Figure 5 represents another arrangement of photographic apparatus, which
may be employed either alone or with another similar apparatus for pro-
ducing and viewing stereoscopic pictures. A, A, simple or compound lenses;
B, moveable partition set in grooves and separating the camera into two
parts; C, frame holding the plates, and adapted to the apparatus by means of
the grooves D, fixed to the bottom; E, slide closing the frame containing the
plates; F, wedge serving to give the necessary level to the apparatus.
Figure 6 represents a tube for holding the objectives. The apparatus
described in Figures 1, 2, and 3, are adjusted at the requisite angle for obtain-
ing stereoscopic pictures, and the sides of the apparatus where the lenses are
nearest to the edge are placed towards each other. For obtaining the angle of
two objects upon the same plate after the first setting of the model, I shut the
right slide of one of the apparatus and the left slide of the other apparatus, and

page_text: then withdraw the frame containing the plate of the left apparatus, and place it
in that of the right one, and vice versa.
By this means the plate of the left apparatus having been made to the angle
of the left apparatus, the second operation in the second apparatus makes the
second angle. I thus obtain six proofs, or three stereoscopic pictures, in a few
seconds by one operation. To obtain the six proofs double by one operation
I add three additional lenses to each camera.
And having thus described the nature of my said Invention, and the manner
of carrying the-same into effect, I would have it understood that I do not
confine myself to the precise details herein laid down so long as the peculiar
character of my Invention be retained; but what I claim is,―
First, the arrangement of apparatus for obtaining several stereoscopic and
photographic pictures by one operation, as herein-before described and referred
to in the Figures 1, 2, 3, 4, and 5 of the Drawing.
Secondly, the transferring the two frames containing the two plates;from
right to left and from left to right to obtain the necessary angle for the pro-
duction of stereoscopic pictures, as herein-before described.
'In witness whereof, I, the said Louis François Saugrin, have hereunto.set
my hand, and seal, this Eighth day of November, One thousand eight
hundred and fifty-four.
Witness,
J. W. F. MENNONS.
L. F. SAUGRIN. (L.S.)