Improvements in Clamps or Clips for use in Photographic Copying Processes.
Year: 1892

page_text: Date of Application, 15th Jan., 1892
Complete Specification Left, 8th Sept., 1892-Accepted, 8th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Clamps or Clips for use in Photographic Copying
Processes.
A. communication by ALOIS DELUG, of 6, Neureutherstrasse, Munich, in the
Kingdom of Bavaria, Art Painter.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool & 6 Bank Street,
Manchester, both in the County of Lancaster, & 323 High Holborn, in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this
invention to be as follows:-
The clamps or clips employed in copying processes in photography have the
drawback of hindering the passage of the light at the points where they grip
or touch the plate to which they are applied. The consequences resulting
therefrom have been long known to every practical man.
This invention has for its object to provide a clamp or clip which, when used
in photographic copying processes, will produce as little injurious a shadow. as
possible. This is attained by constructing the upper arm of the clamp or clip
in a peculiar manner, and more particularly by causing the same to come in
contact with the plate at one point only.
The invention may be carried out in various ways. For instance, the clamp or
clip may consist of a stirrup springing outwards which is formed either of a sheet
spring or a wire. The lower jaw of the clamp or clip is attached to the upper
arm of the stirrup and is bent off at right angles downwards, whilst the upper
jaw is attached to the lower arm of the stirrup and is bent upwards. The
upper jaw is, as already previously mentioned, constructed in such a way that it
stands as little as possible in the way of the action of the light, and only grips
the plate above at one point. It is therefore preferably constructed of wire
which stands vertically on the plate, bends round further above and extends
downwards where it is attached to the lower arm of the stirrup. The lower jaw
may have a correspondingly broader surface, or may come in contact with the under
part of the plate at only two points. The stirrup with its two arms may be
constructed out of one piece of wire on which suitable finger plates, for con-
venience of handling the clamp or clip, are soldered or otherwise suitably fastened.
In another pattern of clamp or clip, two plates may be connected by a spiral
spring and acting with a spring pressure against each other something after the
fashion of a clothes peg, the upper one of which receives the clamp or clip jaw
hereinbefore described.
As this latter stands as upright as possible on the plate and only bends further
upwards, it becomes possible that the rays of light will fall during the entire
duration of the exposure on all points of the plate with the exception of the
points of contact of the upper clamp jaw.
Dated this 14th day of January 1892.
WM. P. THOMPSON & Co.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Clamps or (Clips for use in Photographic Copying
Processes.
A communication by ALOIS DELUG,. of 6, Neureutherstrasse, Munich, in the
Kingdom of Bavaria, Art Painter.
I, WILLIAM Phillips ThompSON F.C.S., M.I.M.E. of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and 6, Bank Street,
Manchester, both in the County of Lancaster, and 323 High Holborn, in the
County of Middlesex, Civil 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:-
The clamps or clips employed in copying processes in photography have the
drawback of hindering the passage of the light at the points where they grip or
touch the plate to which they are applied. The consequences resulting therefrom
have been long known to every practical man.
This invention has for its object to provide a clamp or clip which when used in
photographic copying processes, will produce as little injurious,a shadow as
possible. This is attained by constructing the upper arm of the clamp or clip in a
peculiar manner, and more particularly by causing the same to come in contact
with the plate at one point only.
As shown on the accompanying sheet of illustrative drawings, the invention, may
be carried out in various ways. For instance, in Figures,1 2 3 and 4, the clamp
or clip may consist of a stirrup a springing outwards which is formed either of a
sheet spring, as shown in Figure 1, or of a wire one, as.in Figures 2, 3 and 4. 'The
lower jaw of the clamp or clip is attached to the upper arm of the stirrup a,
Figure 1, and is bent off at right angles downwards, as shown on the drawing,
whilst the upper jaw c is attached to the lower arm of the stirrup a and is bent
upwards. The upper jaw c is, as already previously mentioned, constructed in such
a way that it stands as little as possible in the way of the action of the light, and
only grips the plate above at one point. It is therefore, preferably constructed of
wire which stands vertically on the plate, bends round further above, as shown on
the drawing, and extends downwards where it is attached to the lower arm of 'the
stirrup, as will be seen from Figure 1. The lower jaw may have a correspondingly
broader surface, or as shown in Figure 4 may come in contact with the under part
of the plate at only two points. In Figures 2, 3 and 4, the stirrup with its two
arms may be constructed out of one piece of wire on which at d suitable finger
..plates, for convenience of handling the clamp or clip, are soldered or otherwise
suitably fastened.
'be
Figure 5 shows another pattern of clamp or clip in which two plates e.may"
connected by a spiral spring and acting with a spring pressure against each other
something after the fashion of a clothes peg, the upper one of which receives the
clamp or clip jaw c hercinbefore described.
As this latter stands as upright as possible on the plate and only bends further
upwards, it becomes possible that the rays of light will fall during the entire
duration of the exposure on all points of the plate with the exception of the points
of contact of the upper clamp jaw c.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is:-
:-
The improvements in clamps or clips for use in photographic copying processes
which consist in the upper jaw (c) of such a clamp or clip being made of-wire or

page_text: the like which grips the plate at one point only, and whilst bending from it at a
suitable distance stands as vertically as possible to the same, substantially as
herein before described and shown.
Dated this 7th day of September 1892.
WM. P. THOMPSON & Co.,
Agents for the Applicant.