An Improved Method of Producing Negatives for Photographic "Process" Engraving.
Year: 1894

page_text: Date of Application, 28th Nov., 1894
Complete Specification Left, 27th Aug., 1895-Accepted, 2nd Nov., 1895
PROVISIONAL SPECIFICATION.
An Improved Method of Producing Negatives for Photographic
"Process" Engraving.
I AUGUSTUS WILLIAM KEY BRYAN, of Leicester House, Spotland Road,
Rochdale, Tutor, do hereby declare the nature of this invention to be as.
follows:-
"
The improvements relate to screens employed in photographic
" process
engraving, and have for object to screen sensitized plates prior to their use
in the camera, and thereby to obtain greater facility in the production of screened
negatives.
To accomplish this, and to effect my improvements, I provide a special negative
of glass or film, which I cause to be reticulated by transparent lines on an opaque
ground, to form a screen.
This screen is then placed upon an unexposed sensitized plate, and afterwards
exposed to the light, by which means, a partial exposure of the sensitized plate, in
the form of the reticulated lines, is effected.
The sensitized plate is then employed in the camera, in the ordinary manner, the
result being that a photograph is taken upon a reticulated or screened plate, in lieu
of a plate which is sensitive over its entire surface.
By this means, a screened negative is produced without the employment of gauze
or other like screens, in the camera, and greater facility in operation is thereby
obtained.
Variations in detail, such as the manner of reticulating the negative screen,
together with the form of the reticulations, may be made without departing from
the peculiar character of the invention.
Dated this 27th day of November 1894.
WILLIAM GADD, C.E.,
64 Barton Arcade, Manchester, Agent.
An Improved Method of Producing Negatives for Photographic
"Process" Engraving.
I, AUGUSTUS WILLIAM KEY BRYAN, of Leicester House, Spotland Road,
Rochdale, Tutor, 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 improvements relate to screens employed in photographic process
engraving, and have for object to screen sensitized plates prior to their use
in the camera, and thereby to obtain greater facility in the production of screened
negatives.
To accomplish this, and to effect my improvements, I provide a special negative
of glass or film, which I cause to be reticulated by transparent lines on an opaque
ground, to form a screen.

page_text: These reticulations may be formed upon the special negative by hand, or they
may be developed thereon by photography-from lace, muslin, or other reticulated
objects or surfaces-or by other means, as may be found most suitable.
This special screen is then placed, in any convenient manner, upon, or close to an
unexposed sensitive plate, which plate is required ultimately to form the screened
negative desired, and the screen thus covering the plate is afterwards exposed to
the light; by which means, (light being enabled to penetrate to the sensitive film of
the photographic negative through the transparent lines only) a partial exposure
of the sensitized plate, acting in the form of the reticulated lines, is effected.
The sensitized plate is then employed in the camera, in the ordinary manner, the
result being that a photograph is taken upon a reticulated or screened plate, in lieu
of a plate which is sensitive over its entire surface.
By this means, a screened negative is produced without the employment of
gauze or other like screens, in the camera, and greater facility in operation is
thereby obtained.
Variations in detail, such as the manner of reticulating the negative screen,
together with the form of the reticulations, may be made without departing from
the peculiar character of the invention.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
:-
In the production of negatives for photographic "process" engraving, a special,
reticulated negative, for the purpose of producing reticulations, by exposure, upon
the surface of the photographic sensitized plate, in manner substantially as herein
set forth.
Dated this 26th day of August 1895.
WILLIAM GADD, C.E.,
64 Barton Arcade, Manchester, Agent.