AN IMPROVED FRAME FOR RAPIDLY CHANGING THE PICTURES IN A MAGIC LANTERN
Year: 1884

page_text: WILLIAM CHARLES HUGHES Optician Brewster House 82 Mortimer Road
Kingsland Rd N London do hereby declare the nature of my invention for AN
IMPROVED FRAME FOR RAPIDLY CHANGING THE PICTURES IN A MAGIC LANTERN,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
No 1 set of Drawings represents 6 Figs showing the construction & manner of
working my Invention A B represents nozzle & Lantern Front. c is the Sliding
Frame containing 2 compartments which slides in the grove of Main Frame and is
moved backwards & forwards for the purpose of bringing each compartment before
the condensors of Lantern by the pinion wheel d Fig 4 into the racket E Fig 3,
attached to the Sliding Frame Figs 3 and 5 this operated on by the Lever y Fig 2
which describes an arc of a circle by moveing the Lever g up or down has the
effect of raiseing or Lowering the Shutter F Fig 2 which thereby covers the front
of the nozzle during revolving of pinion wheel D Fig 4 which engageing the
Teeth of the racket attached to sliding Frame c causes it to move in a lateral
direction right or left at the same time the shutter F being attached to the
Lever by means of a small projecting arm describes an arc of a circle and during
the operation of moveing the slide completely covers the nozzle of the Lantern
thereby shutting off the rays of Light which in the end produces the effect of
picture changeing places without being seen.
Drawings No 2 reprosents the same principle but with more than 2 movements
which are effected in the following manner. Figs 1 & 2 represents the method of
application bis the fixed frame containing a grove in which moves the long Sliding
Frame o which is made to move in a lateral direction right or left as may be required
by a pinion wheel of the construction e Fig 3 which once every revolution engages
the Teeth of the rack of the rack m Fig 2 attached to the sliding frame o on which
is cast a small eccentric or cam g Fig 3 connected to the Handle F by means of a
Sinall spindle running thro e and g upon the cam or eccentric g is made to bear by
means of the spring; Fig 3 ; is a small connecting rod attached at the opposite
end to a pin titted into a disc to which is connected by means of a spindle & Fig 1
the shutter c Therefore by turning the handle F which engages pinion wheel c cam

page_text: or concentric g the Teeth of the pinion ongageing once every revolution, the Teeth
of the rack the cam can be set at a suitable possition for the required effect causes
tho connecting rod ; to move backwards & forwards which action causes the crank
disc to revolve part of a circle carrying with it at the same time the shutter c to b
Fig 3 thereby causeing the shutter to be in front of the nozzle of the Lantern during
the action of moveing the slide to a different possition thus effectually preventing
the rays of Light passing out & producing in effect as in drawings No.1 the pictures
changeing place without being seon.
Haveing 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
1 The action of the shutters as por drawings Nos 1 and 2 which plays in front
of the Lantern nozzle carrying front Lens to produce the change of each picture
without the movement being seen when such pictures are projected on the screen in
the Magic Lantern.
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