Improvements in Magic Lanterns for Enlarging or otherwise and in Apparatus Used in Connection therewith.
Year: 1888

page_text: Date of Application, 17th May, 1888
Specification Accepted, 24th Aug., 1888
Improvements in Magic Lanterns for Enlarging or otherwise and in
Apparatus Used in Connection therewith.
WILLIAM CHARLES HUGHES optician Brewster House Mortimer Road Kingsland N.
London 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:
My invention consists (first) in the construction of Lanterns in such a manner as to
give increased portability and in the shape of condensers to be used therewith.
(Secondly) In the construction of a lime carrier whereby I am enabled to insure
more perfect and regular incandeescence and immunity from clogging of the working
parts than has hitherto been accomplished. (Thirdly) In the mechanical arrange-
ments of a frame for holding negatives &c. which I am enabled at will to change
instantaneously.
In order to more fully understand my said Invention 1 have appended the accom-
panying Sheet of Drawings Fig. 1 of which represents the device according to the
first part of my Invention. Fig. 2 The condensers heretofore referred to Fig. 1 A is
the body of the Lantern made of any suitable material and shape with an extension
piece or pieces B similar in shape to that of the body A into which it is made to
telescope fitted to the extension piece B is a frame C in which is provided a slot for
the reception of the slides. Attached to the frame C is a collapsible part D carrying at
its front end the Lens E similar to those ordinarily in use, the whole Lantern resting
on the base board F which is jointed at G thus it will be seen that when the extension
piece B is telescoped into the body of the Lantern A & the part D completely
collapsed & with the part H of the base board turned up the whole apparatus revolves
itself into a small and compact body of such a form as to render it very portable.
Fig. 2 is a perspective view of the condensers heretofore referred to I make rectangular
or square as may be desired in shape. By this means I am enabled to get a much larger
field with a relatively smaller Lantern than would be obtainable with those ordinarily
in use,
thus reducing the size of the Lantern to the lowest possible limits. Fig. 3

page_text: is a sectional view of the apparatus used in carrying out the second part of my
invention in which 1 is the lime carrier having a rotary and up and down movement
imparted to it by means of the bevil wheels J and K. the small bevil wheel J being
fixed to the tubular part L of the lime carrier which has a female screw at its lower
part into which works the male screw M the said screw M being firmly clamped in
the required position upon the pipes N which leads to the jet placed immediately in
front of the lime as is usual.
The modus operandi being as follows Upon rotary motion being given to the
spindle O. which is loosely fitted in its bearings to allow same to rise and fall with the
bracket the bevil wheel K which is fitted to the spindle O is also turned and gearing
with the small bevil wheel J rotates the carrier I by means of the tubular part L
which connects the parts J and I respectively and at the same time imparts to the
carrier I and bracket I an upward or downward motion (according to the direction in
which the spindle O beforementioned is rotated,) by reason of the tubular part L
riding upon the fixed male screw M thus it will be seen by this means I am enabled
to allow the flame of the jet to play upon any desired part of the lime, and by enclosing
the screw M in the tubular part L I effectually prevent same clogging from accumula-
tion of lime or dirt corroding upon it when in use.
Fig. 4 represents the carrier as mentioned in reference to the third part of my
Invention in which P is the frame worked with square aperture Q therein through
which the negatives or slides are projected which are held in the moveable frame R R¹
in the ordinary manner. SS are shutters two in number made of vulcanite or other
suitable material which upon the operator desiring to substitute the one for the other
negative beforementioned automatically close the aperture Q until such substitution
has taken place. The moveable part R R has a rack T attached to same into which
gear the teeth T of the wheel U said wheel being mounted upon a spindle U¹ and
operated by the handle or crank V. The wheel U has, also attached thereto or formed
thereon a can of the shape shown by the dotted lines V on which rides the lever W
pivotted at c and bearing upon a pin d of the bent levers or toggles e. f said toggles
being pivotted at e¹ & fi respectively and gearing each with the other at
and kept
in position by spring j. as shewn from the foregoing description it will be evident that
upon the operator wishing to change the picture, by moving the handle V in the
direction of the arrow immediately the lever U rides upon the enlarged portion of the
cam causing the extremeties of the toggle levers e & f to close, in so doing drawing
the shutters to which they are connected by the links hh with them, said closing of
the shutters being accomplished before the moveable frame has begun to travel & the
opening also being effected immediately the negative is in position opposite the
aperture by reason of the lever Wagain falling into the recessed portion of the cam VI
the sole object being not to leave exposed a negative or slide till it is rearlly in its
place ready for exposure.
Having now particularly described & ascertained the nature of my said Invention I
declare that what I claim is
(First) The Telescopic Lantern body with jointed base board.
(Secondly) The Condensers rectangular or square as described.
(Thirdly) The lime carrier of Jet substantially as described & set forth.
(Fourthly) The negative or slide carrier substantially as and for the purpose set
forth.