Improvements relating to the Projection of Pictures of Moving Objects on a Screen with Stereoscopic Effect.
Year: 1898

page_text: Improvements relating to the Projection of Pictures of Moving
Objects on a Screen with Stereoscopic Effect.
I, GEORGE ROBERT WILSON, of Bilston Lodge, Loanhead, Midlothian, Physician,
do hereby declare the nature of this invention to be as follows:-
The present invention has for its object the display of pictures of moving objects in
relief, or with stereoscopic effect, upon a screen.
To this end, I obtain series of photographs of moving objects taken from different
points of view, after the manner of stereoscopic photographs of stationary objects.
The cameras employed are kinematograph cameras so arranged and geared together
as to operate synchronously and to produce two
series of pictures
or more
simultaneously.
These cameras will be geared together by chain or other suitable gearing, or they
may be driven by a common motor with simultaneous stops, that is, with an electrical
or other mechanism which will ensure that the two or more cameras keep exact time.
The negative film or strip in each camera so used, and the shutters which alternately
admit and exclude the light, will work synchronously, so that, in any given time,
each camera will take exactly the same number of photographs as the other camera
or cameras.
The negatives from this stereoscopic kinematograph camera or cameras will be
printed on kinematograph films or strips. I may print the corresponding images on
one film or strip, side by side, or I may use two or more separate films or strips.
The films or strips I shall cause to be run through sister-lanterns placed near one
another, so that the images projected from the two or more lanterns are super-imposed,
or approximately so, upon a screen.
The lanterns used will be some form of kinematograph lantern, that is, an optical
or magic lantern having a mechanism by which the film or strip bearing the successive
pictures is rapidly passed in front of the light, so that the pictures are projected on
the screen-in rapid succession.
As the cameras were geared together so as to obtain simultaneous negatives, so the
kinematograph lanterns will be geared together so as to throw the corresponding
pictures simultaneously upon the screen.
Each kinematograph lantern will be geared to each of the other lanterns; or they
may all be driven from a common motor. may use ordinary chain gearing, so that
each link in the gearing chain will pull upon a tooth of a toothed wheel, so as to
revolve it through a definite arc of a revolution; or I may use an electro-magnet,
which, by establishing connection with the driving wheels rhythmically, will stop the
revolutions of the several lanterns coincidently, and at regular intervals; or I may
employ other means for driving the lanterns synchronously.

page_text: .
Instead of using separate kinematograph cameras, I may use a double, triple,
quadruple, etc. camera, with kinematograph adjustment, that is, a camera capable of
taking more than one series of pictures simultaneously.
Similarly, instead of two or more lanterns, I may use a double, triple, quadruple, etc.
kinematograph lantern, to project the different series of pictures.
; or I
Into each kinematograph lantern I shall introduce an apparatus for polarising the
light such as was used by Anderton in his patent stereoscopic lantern, 11520 1891
may use differently tinted glass or other screens; or I may use some other method
for differentiating the pictures from the two or more lanterns or lenses.
I shall project these pictures onto a groove or striated silver screen, or onto some
other kind of screen, and the images will be approximately superimposed.
I shall use analysers, or other instruments (see Anderton's patent above mentioned),
which the spectator will use to differentiate the images on the screen. The analysers
may be polarisers, so as to correspond in their effect with the effect of the polarisers in
the lantern; or they may be hand screens so tinted as to correspond in their effect
with the effect of the tinted screens in the lantern. Or they may be some other kind
of instrument, to correspond with another kind of differentiation in the lantern.
The effect of the analysers or corresponding instruments will be to convey the separate
images differentially to the separate eyes, so that the data for a stereoscopic image
will be presented.
may
Instead of superimposing the double, triple, etc. images on the screen, I
project them side by side upon the screen, or otherwise; and instead of using a hand
instrument, which will analyse two or more images, superimposed on the screen,
I may use instruments which will analyse images projected adjacently on the
screen.
2
1
NEWTON & SON,
Agents for the Applicant.
Improvements relating to the Projection of Pictures of Moving
Objects on a Screen with Stereoscopic Effect.
I, GEORGE ROBERT WILSON, of Bilston Lodge, Loanhead, Midlothian, Physician,
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 present invention has for its object the display of pictures of moving objects
in relief, or with stereoscopic effect, upon a screen.
To this end, I obtain series of photographs of moving objects, taken from different
points of view, after the manner of stereoscopic photographs of stationary objects.
The cameras employed are kinematograph cameras so arranged and geared together
as to operate synchronously, and to produce two or more series of pictures
simultaneously.
These cameras will be geared together by chain or other suitable gearing, or they
may be driven by a common motor with simultaneous stops, that is, with an electrical
or other mechanism which will ensure that the two or more cameras keep exact time.
The negative film or strip in each camera so used, and the shutters which alternately
admit and exclude the light, will work synchronously, so that in any given time

page_text: each camera will take exactly the same number of photographs as the other camera
or cameras.
The negatives from this stereoscopic kinematograph camera or cameras will be
printed on kinematograph slides, filins, or strips. I may print the corresponding
mages on one slide, film, or strip, side by side, or I may use separate films or
strips.
The slides, films, or strips, I cause to be run through sister lanterns placed near one
another, so arranged that the images projected from the two or more lanterns are
superimposed, or approximately so, upon a screen.
The lanterns used will be some form of kinematograph lautern, that is, an optical
or magic lantern having a mechanism by which the slide, film, or strip, bearing the
successive pictures, is rapidly passed in front of the light, so that the pictures are
projected on the screen in rapid succession.
As the cameras were geared together so as to obtain simultaneous negatives, so the
kinematograph lanterns will be geared together so as to throw the corresponding
pictures simultaneously upon the screen.
Each kinematograph lantern will be geared to each of the other lanterns; or they
may be driven from a common motor. I may use ordinary chain gearing, so that
each link in the gearing chain will pull upon a tooth of a toothed wheel, so as to
revolve it through a definite arc of a revolution; or I may use an electro-magnet,
which, by establishing connection with the driving wheels rhythmically will stop the
revolutions of the several lanterns coincidentally and at regular intervals; or I may
employ other means for driving the lanterns synchronously.
Instead of using separate kinematograph cameras, I may use a double, triple,
quadruple, etc. camera, with kinematograph adjustment, that is, a camera capable of
taking more than one series of pictures simultaneously.
Similarly, instead of separate lanterns, I may use a double, triple, quadruple, etc.
kinematograph lantern, to project the different series of pictures.
Pictures so projected would appear blurred upon the screen, and would give no
stereoscopic effect, unless differentiated in some way in the lanterns, and again
resolved by some device in front of the eyes.
Into each kinematograph lantern, therefore, I introduce an apparatus for polarising
the light, such as was described by Anderton in the Specification of his Patent for
steroscopic lantern, No. 11520 1891; or I may use differently tinted glass or other
screens; or I may use some other method for differentiating the superposed pictures
projected from the separate lanterns or lenses onto the screen, which I prefer should
be a grooved or striated silver screen, but which may be some other kind of screen, if
desired. For inspecting the images thus differentiated on the screen by polarizers,
tinted glasses, or other means, the spectator is provided with analysers or other
instruments, which analysers may be polarisers (see Anderton's patent above
mentioned), corresponding in their effect with the effect of the polarisers in the
lantern, or they may be hand screens so tinted as to correspond in their effect with
the effect of the tinted screens in the lantern. Or they may be some other kind of
instrument, to correspond with another kind of differentiation in the lantern. The
effect of the analysers or corresponding instruments will be to convey the separate
images differentially to the separate eyes, so that the data for a stereoscopic image
will be presented.
Instead of superimposing the double, triple, etc. images on the screen, I may
project them side by side upon the screen or otherwise, and instead of using a hand
I
instrument which will analyse two or more images superimposed on the screen,
may use instruments which will analyse images projected adjacently on
screen.
the
It may here be remarked that the slides prepared as above explained may, if
desired, be passed through a kinetoscope, and viewed with stereoscopic glasses therein,
in lieu of projecting the pictures on a screen.
This arrangement, however, is not suitable where a company is assembled for
viewing the pictures.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is =
The method of producing pictures of moving objects in relief, or with stereoscopic
effect, substantially as hereinbefore set forth.