Rowing Curtain Enect Ior Side by Side Lanterns viz., a Diaphragm Shutter for Cutting off Alter- nately in Each the Rays of Light.
Year: 1886

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H छ Rowing Curtain Enect Ior Side by Side
Lanterns, viz., a Diaphragm Shutter for Cutting off Alter-
nately in Each the Rays of Light.
I WILLIAM CHARLES HUGHES Optician Brewster House 82 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 :-
Fig. 1. A. A. shows the operation of the diaphragm shutter when in action in side
by side Lanterns.
Fig. 2. A. A. is a full drawing of the diaphragm shutter when apart from the
Lantern. It will be seen by the dotted lines &c as exhibited in Fig. 1 the place it
occupies in the Lanterns while cutting off the rays of light alternately in front of
the Lantern Condensers. K. K. are the Lantern bodies. The shorter shutter
in L. H Lantern showing its position when cutting off the light at the top, and the
longer one when opening the same at the bottom of R H Lantern the diaphragm
when comniencing at this point lowers itself almost to the bottom of R H Lantern.
In order that the whole appliance may run with ease & certainty, each Lantern
is provided with a pocket E E which is placed immediately in front of the
Lantern Condensers and so arranged as to rise quite an inch or more above the
Lantern front in order to steady the diaphragm or shutter when running up and
down inside the pocket, that perfect coincidence of disc's may be maintained with
this arrangement the shutter is divided in the centre C C and hinged to adapt it
to the divergence or convergence of the said Lanterns.
RR are two screws which pass thro' plates B B into a back plate which has a
slut and admits of the shutter A A moving horizontally to allow of further
adaptation in the case of the convergence of the two Lanterns, The diaphragm or
shutter then can be moved upwards and downwards by the wooden handles Z Z
or by rackwork if necessary in front of the condensers to produce the effect so
much desired with side by side Lanterns.
And for further exactness in coincidence and registration of disc's an arrangement
of a new form of register clip is placed in the slide holders of Lanterns. H. H are
upright pieces fastened to a length of circular rod which lies right across each
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page_text: slide holder and works at each end in a circular slot to allow it to revolve out of
position, at one end d the rod is square of about an inch in length which when
placed home on the ground piece keeps it stationary, by removing the same
outwards, it allows the arm to fall to admit of panoramic slides being used,
Thro' the upright piece H. there is a screw P with a milled head this forms a
check to the slides in frames so as to cause them to register accurately the screw is
held firmly by a smaller screw O, at the top of upright H.
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 plan and arrangement of. diaphragm and shutter with hinges sliders &c-
Fig. 2 C C. B B. R. R.
2. The pocket E E that the said shutter runs through in Lantern front as fig. 1.
3. The register clips Fig. 1. H. P. o. d.