IMPROVEMENTS IN APPARATUS FOR HOLDING AND EXHIBITING VIEWS AND THE LIKE, IN MAGIC LANTERNS
Year: 1886

page_text: Date of Application, 13th May, 1886.
Complete Left, 12th Feb., 1887.
Complete Accepted, 15th Mar., 1887.
I, JOHN THOMAS KEY of Machon Bank Sheffield in the County of York, Civil
Engineer do hereby declare the nature of my said invention for IMPROVEMENTS IN
APPARATUS FOR HOLDING AND EXHIBITING VIEWS AND THE LIKE, IN MAGIC
LANTERNS to be as follows:-
My invention has reference to an improved method of holding photographic views
and the like, mounted as Magic Lantern slides and for automatically placing the said
views or like objects in the correct position before the lens, with regularity and
precision.
In carrying out my invention, I mount any desired number of photographs, painted
subjects or similar "slides" in a circle, preferably by cutting out a series of suitably
shaped apertures in a disc of cardboard, papier maché, or other material, and either
perinanently fixing the subjects therein, or making them removable so that they can
be changed when necessary.
The disc is provided with a centre hole, so that it can be secured upon the end of a
spindle projecting from a case containing suitable mechanism which when wound up
will cause the said projecting spindle to revolve and carry with it the disc.
The mechanism or clockwork may be of any construction so that it is suitable for
the purpose named, and it must be so contrived that its speed of travel may be varied
at pleasure, and be instantly stopped and started whenever desired.
The case containing the mechanism may be permanently attached to the Lantern or
be separate therefrom, and its position may also be varied.
For example the said case may be fixed in a position above the lens slide in front of
the chimney, and so that when the disc is fixed upon the end of the projecting spindle
the lowest subject shall be exactly in position with the lens of the lantern. On
starting the mechanism, the disc revolves and the various subjects or slides are
successively brought before the lens; if desired the motion may be intermittent like
the seconds finger of a clock, having a rapid movement while changing the subject
and then resting or stationary for a time, or it may be slow and continuous.
ROBT. F. DRURY,
Agent for the Applicant.

page_text: Improvements in Apparatus for Holding and Exhibiting Views
and the like in Magic Lanterns.
I, JOHN THOMAS KEY of Machon Bank, Sheffield in the County of York Civil
Engineer 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 has reference to an improved method of holding photographic views
and the like, mounted as Magic Lantern Slides, and for automatically bringing the
said views or like objects in the desired position before the lens, with precision and
regularity.
And in order that my invention may be clearly understood, I annex a sheet of
drawings to illustrate how the said invention may be put into practice, the same letters
of reference are to indicate the same parts in any of the figures.
Fig. 1, is a side elevation of a Lantern with my apparatus applied thereto.
Fig. 2, is a front elevation of same.
In carrying out my invention, I prepare a circular mounting frame A, of any
suitable material, such as cardboard, and I mount any desired number of photographic
views, painted subjects, or other suitable objects for lantern slides in a circle,
preferably by cutting out a number of discs and filling the apertures with the views
or other objects B, either so that the can be taken out and exchanged for others
when required or they may be permanently fixed therein."
The circular mounting frame A, is made with a centre hole, preferably strengthened
by the addition of cardboard or metallic washers placed on each side as shown at C,
this hole being for the purpose of securing the frame upon the end of a spindle
projecting from a case D, containing suitable mechanism, which when wound up, will
cause the said projecting spindle E, to revolve, and impart the same motion to the
frame A.
The mechanism or clockwork may be of any construction so that it is suitable for
the purpose named, but it must be arranged so that its speed of travel may be varied
at the pleasure of the Operator or Lecturer, and so that it can be started and stopped
whenever desired. In some cases it may be desirable that the movement shall be
intermittant, so that the object shall remain stationary for a short period, and then by
rapid movement of the frame, the next object shall be brought before the lens; such
mechanism is very readily constructed by a clockmaker or a mechanical engineer
conversant with the arrangement of wheels and such like.
a
The case containing the mechanism may be permanently attached to the Lantern, or
may be separate and removable therefrom; it may also be utilised as a stand for the
lantern to stand upon, in which case the axis of the revolving frame would be below
the lens.
F, is the body of the Lantern, G, is the Chimney, H, is the adjustable slide carrying
the lens

page_text: The starting knob is marked I, and the projecting axle J, is to receive the winding
up_key.
In the arrangement shown, the views or "slides" being circular, the movement of the
frame would be intermittant, but not entirely automatic; thus when the operator had
described the view or other object opposite the lens and therefore exposed to view, he
would press down the knob I, and the mechanism would instantly turn round the
frame A, till the next view was brought opposite the lens, and so on.
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 :-
:-
1. The combination with a "Magic Lantern," of a circular mounting Frame (such
as A,) for holding any kind of views, paintings or other objects, suitable for "Lantern
Slides" and caused to revolve by an arrangement of mechanism, either continuously or
intermittently, and substantially as herein before described and as illustrated.
2. For the purpose of showing photographic copies, paintings, or other subjects by
the aid of a suitable lantern; a revolving frame or disc (such as A) having the said
subjects mounted thereon, and caused to revolve when desired by means of suitable
mechanism, substantially as hereinbefore described and as illustrated.
ROBT. F. DRURY,
Agent for the Applicant.