Improvements in Obtaining Stereoscopic Effects.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Obtaining Stereoscopic Effects.
-I, CHARLES RALEIGH, of 58, Chancery Lane, in the County of Middlesex,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improved means for obtaining stereoscopic effects.
with pictures exposed in rapid succession, so as to give the appearance of moving
objects, such effects being obtainable from a single series of such pictures or
from a single series duplicated. My invention is also applicable to the pro-
duction with stereoscopic effects of what I may term a stationary picture; such
picture being selected from a series of pictures of a moving object taken in rapid
succession.
According to one mode of obtaining stereoscopic effects in the representation
of moving objects, instead of employing a stereoscopic camera and producing two
distinct series of pictures, the two series being respectively taken from points
of view at a greater or less distance apart, I employ a single lens camera, arranged
in any of the modes commonly adopted for taking in rapid succession a series of
photographs of a moving object. Having printed or otherwise reproduced the
series of pictures in duplicate, I pass the two series side by side rapidly through
a stereoscope. Although the two series of pictures are identical, identical repre-
sentations of the object are not under observation at the same time. In other
words, the one series is arranged slightly in advance of the other, according to the
direction of movement of the object photographed. For example, the first picture
in the one series may accompany the third picture in the other series, the second
may accompany the fourth and so on; the relation of the corresponding pictures
in the respective series being however varied according to the degree of relief
desired, the lapse of time between the exposures, the speed of the moving object,
the direction of motion and the distance of the object from the camera.
According to another mode of accomplishing the same object, I employ a single
series of pictures, but expose them in a stereoscope arranged in such a manner that
the eyes of the observer, looking through the two lenses of the instrument, see
the first and the third pictures at the same time, then the second and the fourth,
and so on; or the first and the fourth, the second and the fifth, and so on, accord-
ing to the conditions before referred to as rendering variations in this respect
desirable.
From the foregoing, it will be readily understood that in order to produce from
a series of representations of a moving object any given stationary picture, the
subject appearing in relief, it is only necessary to select two of the pictures more

page_text: or less removed from one another as regards their proper positions in the series,
and to expose the same to view in a stereoscope.
Dated this 15th day of June 1898.
Improvements in Obtaining Stereoscopic ] Effects.
I, CILARLES RALEIGH, of 58, Chancery Lane, in the County of Middlesex,
Mechanical 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:-
This invention relates to improved, means, for obtaining stereoscopic effects
with pictures exposed in rapid succession, so as to give the appearance of moving
objects; such effects being obtainable from a single series of such pictures, or
from a single series duplicated. My invention is also applicable to the pro-
duction with stereoscopic effects of what I may term a "stationary" picture; such
picture being selected from a series of pictures of a moving object taken in rapid
succession.
According to one mode of obtaining stereoscopic effects in the representation
of moving objects, instead of employing a stereoscopic camera and producing two
distinct series of pictures, the two series being respectively taken from points
of view at a greater or less distance apart, I employ a single lens camera, arranged
in any of the modes commonly adopted for taking in rapid succession a series of
photographs of a moving object. Having printed or otherwise reproduced the
series of pictures in duplicate, I pass the two series side by side rapidly through
a stereoscope. Although the two series of pictures are identical, identical repre-
sentations of the object are not under observation at the same time. In other
words, the one series is arranged slightly in advance of the other, according to the
direction of movement of the object photographed. For example, the first picture
in the one series may accompany the third picture in the other series, the second
may accompany the fourth, and so on; the relation of the corresponding pictures
in the respective series being however varied according to the degree of relief
desired, the lapse of time between the exposures, the speed of the moving object,
the direction of motion and the distance of the object from the camera.
Fig. 1 of the accompanying diagrams illustrates this method of arrangement,
picture No. 1 in the right-hand series accompanying picture No. 3 in the left-
hand series. In Fig. 2, picture No. 1 in the right-hand series accompanies picture
No. 2 in the left-hand series.
According to another mode of accomplishing the same object, I employ a single
series of pictures, but expose them in a stereoscope arranged in such a manner that
the eyes of the observer, looking through the two lenses of the instrument, see
the first and the third pictures at the same time, then the second and the fourth,
and so on; or the first and the fourth, the second and the fifth, and so on, accord-
ing to the conditions before referred to as rendering variation in this respect
desirable. The former of these two methods is illustrated in Fig. 3 of the accom-
panying diagrams; pictures Nos. 1 and being presented simultaneously. The
next pair to be seen would be Nos. 2 and 4.

page_text: The diagram Fig. 4 illustrates a similar method of working in which pictures
Nos. 1 and 2 are seen together, then Nos. 3 and 4 and so on.
From the foregoing, it will be readily understood that in order to produce from
a series of representations of a moving object any given stationary picture, the
subject appearing in relief, it is only necessary to select two of the pictures more
or less removed from one another as regards their proper positions in the series,
and to expose the same to view in a stereoscope.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I claim :-
1. The herein described method of producing stereoscopic effects consisting in
taking a series of photographs of an object in motion, duplicating the same,
arranging the two series of representations side by side the one slightly in advance
of the other and passing them through a stereoscope so that pictures Nos. 1 and 2,
or Nos. 1 or 3, or Nos. 1 and 4 are viewed simultaneously.
2. The herein described method of producing stereoscopic effects consisting in
taking a series of photographs of an object in motion and passing the same
through a stereoscope constructed in such a manner that pictures Nos. 1 and 2,
or Nos. 1 and 3, or Nos. 1 and 4, are viewed simultaneously.
Dated this 20th day of March 1899.
For the Applicant,
G. G. M. HARDINGHAM,
Chartered Patent Agent, Clun House, Surrey Street, London, W.C.