IMPROVEMENTS APPLICABLE TO CABINET STEREOSCOPES AND OTHER SIMILAR APPARATUS
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by George Stothert Penny at the
Office of the Commissioners of Patents, with his Petition, on the
9th May 1870.
I, GEORGE STOTHERT PENNY, M.R.C.S. England, of Cheltenham, in
the County of Gloucester, do hereby declare the nature of the stid
Invention for "IMPROVEMENTS APPLICABLE TO CABINET STEREOSCOPES AND OTHER
SIMILAR APPARATUS," to be as follows:-
:-
My Invention relates to improvements applicable to cabinet stereo-
scopes and to other similar instruments for viewing photographic and
other pictures through lenses.
The chief improvement consists in exhibiting photographs or views
under a succession of different tints to represent morning, noon,
evening, moon and sun light, and night effects, and replacing the
picture viewed by another during the obscurity of the night scene.
Each picture is caused to pass through these chromatic changes as
herein-after described.

page_text: In applying my improvements to cabinet stereoscopes I mount the
series of pictures to be viewed on endless bands, carried on horizontal
shafts disposed within the cabinet, the pictures being brought suc-
cessively into a vertical position before the lenses as usual. The different
tints producing the various effects above mentioned are imparted to
the picture by the aid of a multi-colored drum or cylinder, the
surface of which reflects the light on to the picture tinged with color
for producing the effect desired. This drum may either be cylindrical
or polygonal in form, its surface being covered with a succession of
colors varying gradually from cold neutral tints to bright hues, and vice
versa, to represent the different changes from morning to night. I
mount this drum on a horizontal shaft carried in bearings at either side,
the drum being placed in front of the picture and just above the line of
vision. The drum is caused to perform one revolution whilst the
picture remains in view, and is provided at its darkest part with a black
flap or screen hinged thereto, which on the completion of each revolution
falls and obscures the picture, which is then replaced by another, and the
flap afterwards drawn up against the drum. The drum shaft is rotated
by means of a knob outside the cabinet or case, and is geared with the
shaft carrying the endless bands on which the series of pictures are
mounted, so that the said shaft (the motion of which is intermittent)
makes a partial revolution only for each entire revolution of the color
drum. The lens box is moreover provided with a shutter hinged
thereto, which is closed by a projecting arm on the knob spindle at the
moment the picture is changed; after, when it is released and the
lenses are again uncovered, light is admitted for illuminating the
revolving cylinder, while a lamp is used at night; the upper part of
the cabinet being made with doors to open for the admission of light,
suitable reflectors being also provided, so adjusted as to throw the light.
directly on the colored cylinder, whence it is again reflected on to the
picture as before described. The surface of the cylinder may be either
painted or covered with metallic foils of different colors producing the
desired effects by reflection.
Another improvement consists in the means of mounting or securing

page_text: back with which the frame is provided, and which is closed by a small
sliding bolt. By this means the pictures may be readily inserted or
removed from the frames when they arrive opposite the opening in the
cabinet.