Improvements in Optical or Magic Lantern Slide Carriers.
Year: 1891

page_text: Date of Application, 17th June, 1891
Complete Specification Left, 16th Mar., 1892-Accepted, 16th Apr., `1892
PROVISIONAL SPECIFICATION.
Improvements in Optical or Magic Lantern Slide Carriers.
ALFRED WRENCH 50 Gray's Inn Road London W.C. Wholesale Optician do
hereby declare the nature of this invention to be as follows:-
1
With this carrier the slides are automatically raised, after having been exhibited,
so that they can be lifted out by the edges with the thumb and finger, thus.
preventing the faces of the slides from being soiled while being taken out of the
carrier and replaced in the storage box, this is effected by means of a moveable
base to the carrier on which the slide which is being exhibited rests, when the
sliding carrier is drawn along the frame to allow the second slide to be shewn, it
passes over an incline, which raises the moveable base, thus lifting the slide which
has been exhibited above the level of the top of carrier, when it can then be
removed.
Dated this 16th day of June 1801
COMPLETE SPECIFICATION.
Improvements in Optical or Magic Lantern Slide Carriers.
ALFRED WRENCH 50 Gray's Inn Road London Middlesex Optician 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 :-
With this carrier the slides are automatically raised, after having been exhibited
so that they can be lifted out by the edges with the thumb and finger, thus
preventing the faces of the slides being soiled while being taken out of the carrier
and replaced in the storage box, this is effected by means of a moveable base to the
carrier, on which the slide which is being exhibited rests, when the sliding carrier
is drawn along the frame to allow the second slide to be shewn it passes over an
incline which raises the moveable base, thus lifting the slide which has been
exhibited above the level of the top of carrier when it can then be removed.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing, in which
Fig. 1 is a front sectional elevation through the line C. D. Fig. 2, and Fig. 2 is.
a side elevation of a lantern slide carrier constructed according to my invention.
Similar letters in both figures represent similar parts. A is frame of carrier to
be fixed in lantern stage. B is a double slide to carry slides a, a¹. b. bare rising
and falling bases or platforms running in the groove C.
The operation of the instrument is as follows:-The slide to be exhibited, is, in
the first instance dropped into the double slide B, as represented by, a, upon
pushing forward the double slide, B, the base or platform, , slides down the
inclined plain, d, into the groove. c, allowing the slide, a, to drop and occupy the
position as represented by slide, a', at the same time the base or platform, 61, slides
up the inclined plain, d, so lifting the slide, a', into the position as represented by
the dotted lines. In the return motion the actions of the moving parts are.
rice versa.

page_text: 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. In optical or magic lantern slide carriers, the use of a moveable base or
platform, b, for automatically raising and lowering the slide substantially as 5
hereinbefore described and represented in the accompanying drawing.
Dated this 16th day of March 1892.
A. WRENCH.