Improvements in and relating to the Production and Exhibition 'of Representations of Pictures, Advertisements, and the like upon Projection Screens.
Year: 1897

page_text: Date of Application, 17th July, 1897-Accepted, 11th Sept., 1897
CALL DIE
Improvements in and relating to the Production and Exhibition 'of
Representations of Pictures, Advertisements, and the like upon
Projection Screens.
We CHARLES WILLIAM COWAN of 5 Clovelly Terrace, New King's Road,
Walham Green, London, S.W., Dental Surgeon, and DANIEL. ILES of 54 Granville.
Road, Walthamstow in the County of Essex, Builder do hereby declare the nature.
of this invention and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement:
"
:
This invention relates to certain improvements in and relating to the pro-
duction and exhibition of representations of pictures, advertisements and the
like the object being to. produce representations upon projecting-screens," of
set pieces borders, or frames of various designs or delineations, combined with
photographic pictures or representations upon the same screen, and simul-
taneously.
In carrying the invention into effect there is to be employed two or more
"projecting" lenses, focused to produce. a combined representation, one of the
said lenses being of wider angle to that of the other lens, and set up so as to be
worked together.
One of the lenses will be employed for projecting photographic or pictorial
representations on the centre portion of the screen and the other lens or lenses
is or are to be used with a different light or illuminant to project a representation
or representations serving as a border or framing to the centre portion of the
picture.
The illuminants employed should preferably be, for one lens, for instance the
centre picture lens, the electric-light and for the other lens or lenses, the lime-
light.
In this way some portion of the rays of the outer presentation will, when two
lenses are used, have to cross the lines of the rays of the central representation,
and therefore the character of the illuminant is diversified, but whether this be
adopted or not the lenses are worked side by side and focused relatively to each
other, so that the picture presented in its entirety will be of the duplex character
specified.
According to a modification of this application, particularly for outdoor pre-
sentations or exhibits, the duplex character of the projection-illuminant and
projection rays may be employed by way of three lenses arranged side by side,
or above and below the centre projection lens; the outer two of the lenses being
employed to represent and present two half portions of the border of the picture
and so that the projected rays will not cross those of the centre presentation.
Annexed hereto is a sheet of drawings illustrating diagramatically the
application of the invention and the same will be referred to by figures and letters
in the following description.
Fig. 1 represents the employment of two projection lenses A, B, combined with
the bordered projection screen C, D. The lens A, is to be of “lesser-angle”
5.

page_text: than the lens B, and they are to be focused and used to effect from the lens of
the lesser angle of projection a representation upon the portion C, of the pro-
jection screen, the lines of these rays being indicated by the dotted lines a: and
from the lens B, of larger-angle the rays projected are indicated by the
dotted lines b, and represent a border, or frame to the centre picture.
.6
These lenses A, B, are shown as supported upon a table and arranged side by
side, the lines of the screen C, D, being shown rectangularly arranged.
In the Fig. 2, the bordered representation screen C', D', is represented by
curvilinear lines, but the two sets of lenses A, and B, B', are arranged in tier,
lenses B, B being above and below the lense A. The lenses B, B1, are of larger
angle of representation to the lense A, but the said lenses will be focused to and
will project respectively the portions of the border representation at D', and in
this way the rays will be thrown on the screen without intercepting or crossing
and the illuminant used need not be diversified.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is:
First. The improvements in and relating to the production and exhibition of
representations of pictures, advertisements and the like as and for the purposes
herein set forth.
Secondly. In the production, presentation or exhibition of pictures, adver-
tisements and the like the two or more lenses provided with illuminants of diverse
character and the " projection screen as and for the purpose herein set forth
and described in reference to the accompanying drawings.
"
Dated 17th July 1897.
For the Applicants,
WALTER
BARLOW,
306 High Holborn, London, W.C.,
Consulting Engineer and Patent Expert.