IMPROVEMENTS IN PRODUCING LETTERS OR OTHER DEVICES OR DESIGNS UPON GLASS
Year: 1876

page_text: LETTERS PATENT to Stephen Joseph James Kelly, of Gray's Inn Road, in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN PRODUCING
LETTERS OR OTHER DEVICES OR DESIGNS UPON GLASS."
Sealed the 12th December 1876, and dated the 15th June 1876.
PROVISIONAL SPECIFICATION left by the said Stephen Joseph James Kelly
at the Office of the Commissioners of Patents on the 15th June 1876.
STEPHEN JOSEPII JAMES KELLY, of Gray's Inn Road, in the County of Middle-
sex. "IMPROVEMENTS IN PRODUCING LETTERS. OR OTHER DEVICES OR DESIGNS
UPON GLASS."
The ordinary way of producing letters or other devices or designs upon glass
in burnished metals is to coat the surface with burnished metal and then to protect
the parts desired by drawing the letters or devices by hand with varnish or paint.
All the metal except that thus protected can then (after drying) be readily, brushed
or rubbed off. Sometimes the same effect is produced by stencil plates. The first
of these modes is expensive, while the second is not applicable to all classes of work.
Now, according to my Invention, after coating the surface of the glass with
burnished metal in the usual way, I apply the letters or devices thereto by a
transfer from a lithographic stone bearing the said letters or devices. The material
used on the stone must be good oil varnish, and be printed on paper previously
prepared with starch and commonly known as "transfer paper." After the transfer
is applied to the metal on the glass a roller is passed over it a sufficient number
of times to cause it to adhere firmly to the surface. Water is next applied to the
back of the transfer, and then the paper is peeled off, leaving the letters or devices
on the burnished metal. When thoroughly dry the superfluous metal is rubbed
off in the usual manner.
The same process can also be applied to producing embossed effects upon glass,
that is to say, I transfer the design to the bare surface of the glass, and after peeling
off the paper, as above described, and allowing the design to dry, I apply fluoric
acid to the glass, which acid will eat into all parts of the surface not protected by
the varnish from the transfer paper.
Another part of my Invention relates to the production of the shade lines or
shading to the letters or other devices, and of colored grounds or fields when desired.
I proceed as follows:-The design is drawn on a lithographic stone or stones, and
[Price 2d.1

page_text: an impression is taken therefrom upon transfer paper.
The surface of the glass
is covered with transfer varnish, and the transfer is applied thereon. I prefer to
do this before the varnish is dry, so that the operator may be able to shift the
transfer to its proper place should it not "register" correctly at first. After drying
the transfer paper is peeled off, the work being then complete.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Stephen Joseph James Kelly in the Great Seal Patent Office on the
15th December 1876.
STEPHEN JOSEPH JAMES KELLY, of Gray's Inn Road, in the County of Middle-
sex. "IMPROVEMENTS IN PRODUCING LETTERS OR OTHER DEVICES OR DESIGNS
UPON GLASS."
My Invention relates to the production of shade lines or shading or colored
embellishments to letters or other devices or designs upon glass.
According to the ordinary process, when the solid form or outline of the letters
or devices has been produced on the glass in burnished metal in the usual way,
it is the practice to finish the work by supplying the supports sometimes called
shading" and blocking to the letters by skilled hand labour, the difficulty of
printing directly upon glass having hitherto prevented any other mode being
followed.
"
Now, according to my Invention, I produce the shade lines or shading or colored
embellishments to the letters or other devices, as about to be described, when their
solid form or outline has been produced in burnished metal.
I draw the designs of the said shade lines, shading, or embellishments on
lithographic stones to fit the outlines of the letters or devices which are already
on the glass in burnished metal. I then print the said designs on ordinary transfer
paper in the colors desired. I next varnish the glass with the peculiar varnish
known as transfer varnish, which is of such a nature as to dry quickly, but at
the same time to leave a strong "tack" or sticky feeling on the surface of the
varnish. The transfer paper containing the designs is now laid on a cushion or
pad, and the varnished glass is held over it, adjusted to place, and then dropped
on the paper. The varnish being sticky holds the color work or design which is
on the paper with sufficient tenacity, resisting the drag of the paper when water
is subsequently applied to the back thereof for the purpose of separating the color
work or design from the paper.
In order to lessen the chance of failure through disturbance of work by the
expansion of the paper, I use a thin "plate" paper "having a clean decalco pre-
paration. The thinner the paper the weaker it is, and therefore the less is the
drag on the paper.
Colored grounds or fields may be likewise printed on the transfer paper if desired;
but if the grounds or fields be left open any required color or colors may be applied
by hand to the back of the glass, thereby forming a greater substance than would
be produced by printing.
And having now described the nature of my said Invention, and in what manner
the same is to be performed, I declare that I claim producing the shade lines,
shading, or colored embellishments to the letters or other devices or designs on
glass, substantially in the manner herein-before described.
In witness whereof, I, the said Stephen Joseph James Kelly, have hereunto
set my hand and seal, this Fourteenth day of December, One thousand eight
hundred and seventy-six.
S. J. J. KELLY. (L.S.)
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