Improvements in or connected with Optical Lanterns.
Year: 1897

page_text: Improvements in or connected with Optical Lanterns.
I, ALEXANDER YOUNG MORTON, Bachelor of Medicine, and Master of Surgery,
Tharsis, Province of Huelva, Andalucia, Spain, do hereby declare the nature of this
invention to be as follows:-
The object of the invention is to provide a simple, cheap and accurate method of
adjusting the slides in an optical lantern, so that when two or more lanterns are
used in conjunction the images thrown on the screen may be readily and perfectly
superimposed.
This invention consists principally of an adjustable platform or stage, actuated
by screws; a swinging quadrant containing a horizontal stop, and two clamping
screws. All the parts form one piece of apparatus, which may be rigidly fixed to
the base of the lantern by means of the clamping screws.
An alternative form of the invention is also sought to be covered by this
specification in which the clamping screws are dispensed with, and in which the
apparatus is incorporated in the lantern front, forming part of its stage.
The working of this invention will be more readily understood by means of the
accompanying sheets of drawings of which Fig. 1 is an elevation, Fig. 2 a plan
and Fig. 3 an end view. The registering slides or discs are placed on the stages
of two or more lanterns and lowered or raised by means of the two milled nuts
with which the apparatus is provided, until their horizontal lines are coincident,
while the quadrant contains a screw which adjusts to form a stop for securing
vertical coincidence. The quadrant itself is fixed by means of a thumb-screw.
and can be swung out of the way when using longer slides or slides not requiring
registration.
100%
ALEXANDER YOUNG MORTON,
Bachelor of Medicine, & Master of Surgery,
Tharsis, Province of Huelva,
Andalucia, Spain.

page_text: improvements in or connected with Optical Lanterns.
ALEXANDER YOUNG MORTON, Bachelor of Medicine and Master in Surgery,
University of Glasgow, presently in Tharsis, Province of Huelva, Andalucia, Spain,
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:-
-
"
The object of the invention is to provide a simple, cheap and accurate method of
adjusting the slides in an optical lantern, so that when two or more lanterns are
used in conjunction, the images thrown on the screen may be readily and perfectly
superimposed.
The invention consists principally of an adjustable platform or stage actuated
by screws; a swinging quadrant containing a horizontal stop, and two clamping
screws. All the parts form one piece of apparatus which may be rigidly fixed to
the base of the lantern by means of the clamping screws. An alternative form of
the invention is also sought to be covered by this specification in which the clamping
screws are dispensed with, and in which the apparatus is incorporated in the
lantern front forming part of its stage.
The working of this invention will be more readily understood by means of the
sheets of drawings of which Figure 1 is an elevation, Figure 2 a plan, and
Figure 3 an end view. The part marked A shewn in drawing, Sheet I is securely
fixed by means of the two clamping screws BB to the lower aspect of the fronts
of two or more lanterns; the stages or moveable parts of the apparatus C on which
have been placed the registering slides are then lowered or elevated by means of
the two milled nuts DD with which the apparatus is provided until the horizontal
lines, in the registering slides, are shewn in an illuminated disc to be coincident.
The quadrant E contains a screw F which adjusts to form a stop for securing
vertical coincidence.
The quadrant itself E is fixed to A by means of a thumb-screw G and can be
swung out of the way when using longer slides, or slides not requiring registration.
The alternative form of the invention shewn in drawing Sheet II is similar in
construction and identical in working, the clamping screws only being suppressed,
and the apparatus incorporated in the lantern front in the process of lantern
construction. Here A is fixed in the lantern front, the holes B, B1 receiving
the bolts which connect the front to the body of the lantern C the moveable part
of the stage lowered, or elevated by means of the two milled nuts D, D, the
quadrant with its stop F and the thumb-screw G being identical to the parts
distinguished by these letters in drawing Sheet I.
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 in my invention of novel principles in the manner of procuring
correct registration of lantern slides in optical lanterns.
1st. By means of a rigid yet adjustable stage lowered or elevated to fine grada-
tions by means of milled or other nuts.
2nd. Its quadrant--a distinct novelty-by means of which vertical coincidence

page_text: is secured, being easily moved out of the way, thus offering no impediment to the
use of slides where registration is not demanded.
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