An Improved Apparatus to be Used in Connection with a Magic Lantern for Advertising and other Purposes.
Year: 1886

page_text: An Improved Apparatus to be Used in Connection with a Magic
Lantern for Advertising and other Purposes.
MARY WALLACE UTTING Woodlands Anfield Liverpool Matron do hereby declare
the nature of this invention to be as follows:-
An apparatus to be attached to a Magic Lantern for the purpose of moving by
means of Springs and Clockwork Machinery a circular Disc, and to be placed in
such a position that one of the segments of the disc may be in the focus of the Lantern.
This disc to be divided into segments, each segment to contain an object intended to be
shewn by the Lantern. The movement of the Disc to be regulated by the clockwork
machinery so as to bring each object into the focus of the Lantern at regular intervals.
The appartus to be of such power that it may be capable of sustaining action for a number
of hours. The uses of the above are intended specially for the purposes of advertise-
ment.
MARY WALLACE UTTING.

page_text: Lantern for Advertising and other Purposes.
MARY WALLACE UTTING St. Anne's Hill Anfield Liverpool (formerly of Woodlands,
Anfield, Liverpool) Matron 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 ralates to an apparatus for changing automatically, the picture or
design thrown on a screen by a Magic Lantern so that when used in Public
places for advertising purposes, the services of an attendant may be required only
occasionally to trim the lamps and set the apparatus in motion. I dispense with the
ordinary slides for the Lantern and use a revolving disc on the face of which are
carried a number of sheets of glass upon which the designs or advertisements are
delineated. This disc is pivotted on its centre and is fixed, in such a position that as it
rotates the designs take up their proper positions between the condenser and the
objective lenses of the Lantern.
The rotatory motion of the disc is given through suitable gearing by the action of a
coiled spring, falling weights or by electrical or other power.
The action of this Spring or other power is controlled by clockwork to give it an
intermittent action, so that cach design may be shewn for a certain period of time at
the expiration of which, by a partial rotation of the disc, another design is instantly
substituted.
I will now give an explantion of the apparatus as I prefer to construct it and of its
action by reference to the accompanying drawings.
Figure 1 is a front view with the front of the motion box removed so as to show the
clockwork gearing &c.
Figure 2 a side view with the end of motion box removed.
Figure 3 a plan of the disc with top of motion box removed.
A is a magic Lantern, A" the front lenses which are attached to the body of the
Lantern by the upper part only so as to leave a clearance in which the disc revolves.
B is the disc with recesses and spring clibs Bb to carry the sheets of glass C upon
which the picture or advertisement is drawn.
D is the case or box containing clockwork springs and other motion.
E is a Barrel containing a coiled spring, the wheel upon which drives the pinion F
fixed upon disc Spindle.
G G G are wheels and pinions communicating motion from the spring E to a
cam Hand to a worm and wheel driving a controlling fly J.
K is a lever one end of which rests on the cam H.
K is a projection of this lever catching an arm of the fly Spindle J³.
L is a train of clockwork driven by a coiled spring L' and regulated by a lever
balance.

page_text: To the spindle L" in this train of clockwork and revolving with it is fixed a pin carrying
a plate M with its pins Mm Mmm. The action is as follows:-The Springs E & L
being wound up and the clockwork L being set in motion-The lever K is so
balanced that when at rest its outer end lies in the depression of the cain H while the
projection K* catches the arm I on the fly spindle detaining it & preventing any
motion of spring E. The inner end of the lever K being in the path of revolution of the
pins on the plate M driven by the Clockwork L when one of the pins M or Mmm comes
in contact with it, it is tilted and the fly is released, the spring E is then free to work
during one revolution of the cam the raised position of the circumference of which
prevents the lever from falling until the depression comes round again, when the lever
assumes its position of rest, stopping the motion.
The gearing G, G, G is so proportioned that, during the action of the spring, the
disc B is driven such a part of a revolution as will bring a fresh design in front of the
lenses. On another pin reaching the lever the operation is repeated. The pin plate M
revolving in regular periods, say of one minute two pins, as shewn in the drawing
causes a change every half minute. This of course can be varied according to the
number of pins or the speed of the clockwork.
The clips B on the disc allow of a new set of designs to be readily fixed into
the disc.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what-I claim is :-
The application of any mechanical power or combination for the purpose of
automatically changing the objects to be shewn by a Magic Lantern.