An Improved Photograph Changing Stereoscope.
Year: 1896

page_text: Date of Application, 26th Aug., 1898-Accepted, 6th Feb., 1897
COMPLETE SPECIFICATION.
An Improved Photograph Changing Stereoscope.
1, WILLIAM ALLAN FRIED, of No. 4 Evastrasse, and No. 7 St. George
Kirchenstrasse, Hamburg in the German Empire, Merchant do hereby declaro
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 a photograph changing storeoscope, constructed after
the manner of American stereoscopes, in which the inconvenience of insertion of
fresh pictures is entirely obviated, and new soones are brought continually before
the eye of the spectator, which may be effected in alternative desired sequence from
left to right or right to left and at any speed.
In order that my invention may be the better understood, I now proceed to describe
the same, reference being had to the accompanying drawinga and to the letters and
figures marked thereon.
Figure 1 is a sectional view on the line y y of Figure 3 with the strip of pictures
omitted.
Fig. 2, is the same view with the strip of pictures fed over rollers.
Fig. 3, is a longitudinal seotion on the line - of Figures 1 and 2.
This invention consists essentially of a rectangular metal box a, within which is
fitted a winding-off or stock-roller 6' and a winding-on roller 6 for photographic
pictures, which are either on ordinary photographic paper, strengthened by linen,
or copied direct on celluloid or film. The strip is led at the open front side of the
box over two guiding rollers C and D, and for flattening the picture, over a
protecting shield E inserted at the back. The rotation of the "winding on or
off" rollers bb is effected by change-gear F, G, driven alternatively from a hand
wheel H with cog wheel J, arranged on the inside of the box to gear alternatively
iuto For G. According to the position of the cog wheel J, the latter may be made,
to engage either with the winding-off roller 6' or with the winding-on roller b and
the direction of movement of the passing pictures may bo thus reversed. The
eye-piece M of the stereoscope is fixed to a bar in sliding in a recess R in the
bottom of the box a and it is operated for adjustment of the eye-piece by a rack T
under said bar m by a pinion S. worked by a hand wheel V.
In order to avoid the removal of the stereoscope from the eyes to change the
pictures, it may be mounted on the head of a suitable heavy stand so as to revolve
thereon, and in order to fix it in a desired augular position, a segmental piece fi
may be provided on the box a Fig. 4, which can be fixed to the arm d' of the head
of the stand by means of a clamp screw.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
lat. An arrangement in so called American stereoscopes, consisting of a box
with windable web stereoscopic pictures, and direct front illumination of the
picture, the stereoscope being adjustable by combination with a stand, substantially
as described.
2nd. In the arrangement claimed in Claim 1 a device for changing the direction
of movement of the "winding-off" and "winding-on rollers," consisting of cog
wheels on said rollers, alternatively gearing with a central hand-driven cog-wheel
on pivotting frame, substantially as described.

page_text: 3rd. In the arrangement claimed in Claim 1 a rack on the bar of the eye-piece
and a pinion with hand wheel on the box or case, for the purpose of adjusting the
distance of the stereoscope pictures to the eye-sight of the spectator, substantially
as described.
4th. In the arrangement claimed in Claim 1 the construction of a stand with a
pivotable & angularly adjustable joint, substantially as described in reference to
Fig. 4.
Dated th: 6th da
1000
FELL & JAMES,
1 Queen Victoria Street, Agents for the Applicant.