Year: 1886

page_text: Date of Application, 28th Apr., 1886.
- Complete Left; - 24th Jan., 1887.
Complete Accepted, 5th Apr., 1887.
I JEAN BAPTISTE JOSEPH JOURNOUD, Engineer of Lyon in the Republic of
France, do hereby declare the nature of this invention to be as follows:-
This invention relates to the application of celluloid, xylonite and the like to
photography by using celluloid, xylonite or the like plates for negatives and positives
as also by replacing the ground glass in the camera by translucent plates of celluloid,
xylonite or the like.
Glass, paper, cardboard, metal and other materials used in photography up to the
present for negatives and positives present serious inconveniences. Glass is breakable,
heavy and cumbersome, faults particularly serious for travelling and for the country.
Paper, cardboard and metal plates possess an opaqueness which renders the watching
of the development exceedingly difficult and prevents the operator from precisely
assuring himself of the reduction of the silver film by the cyanides and hyposulphites.
To obtain at once the necessary rigidity lightness and resistance to breakage and
warping by the action of the water bath and reagents, as well as the necessary
transparency or translucency I employ thin plates of celluloid, xylonite or the like.
Dated this 28th day of April 1886.
W. P. THOMPSON & BOULT,
Agents.

page_text: COMPLETE SI DUIFICATION.
Improvements in Plates and the like for Photographic Purposes.
I, JEAN BAPTISTE JOSEPH JOURNOUD, of Lyon in the Republic of France,
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:-
This invention relates to the application of celluloid, xylonite and the like to
photography by using celluloid, xylonite or the like plates for negatives and positives
as also by replacing the ground glass in the camera by translucent plates of celluloid,
xylonite or the like.
Glass, paper, cardboard, metal and other materials used in photography up to the
present for negatives and positives present serious inconveniencies. Glass is breakable
heavy and cumbersome, faults particularly serious for travelling and for the country.
Paper, cardboard and metal plates possess an opacity which renders the watching of
the development exceedingly difficult and prevents the operator from precisely assuring
himself of the reduction of the silver film by the cyanides and hyposulphites.
To obtain at once the necessary rigidity, lightness and resistance to breakage and
warping by the action of the water bath and reagents, as well as the necessary
transparency.or translucency I employ thin plates of celluloid, xylonite or the like.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I claim is
1. The employment of plates of celluloid, xylonite or equivalent cellulose-product as
the support or foundation for negative or positive photographic images or productions.
2. The employment of plates of celluloid, xylonite or equivalent cellulose-product
for the focussing plates of photographic cameras.
Dated this 24th day of January 1887.