IMPROVEMENTS IN PAINTING UPON GLASS. AND IN PROTECTING PAINTINGS UPON GLASS
Year: 1858

page_text: LETTERS PATENT to William Potts, of Handsworth, in the County of
Stafford, Manufacturer, for the Invention of "IMPROVEMENTS IN PAINTING
UPON GLASS. AND IN PROTECTING PAINTINGS UPON GLASS."
Sealed the 2nd August 1858, and dated the 6th February 1858.
PROVISIONAL SPECIFICATION left by the said William Potts at the
Office of the Commissioners of Patents, with his Petition, on the 6th
February 1858.
I, WILLIAM POTTS, of Handsworth, in the County of Stafford, Manufacturer,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
PAINTING UPON GLASS, AND IN PROTECTING PAINTINGS UPON GLASS," to be as
follows:-
My said Invention consists of the methods herein-after described of painting
upon glass, and of protecting paintings upon glass, so as to defend the same
from injury. In producing paintings upon glass according to my Invention,
I lay on first a ground color and then remove the marginal colour from the
outline of the design, by which means transparency of effect is produced. I
paint some portions of the design on the face of the glass, and other portions
on the back of the glass, varying with the nature of the design. By this
method of painting upon glass effects are produced which are unattainable by
printing upon one side only of the glass. I protect the painting by placing a
sheet of glass upon the glass painted upon, and hermetically closing the space
between the two sheets of glass by means of a marginal line of varnish or

page_text: other cement between the two plates. The back of the glass painted upon is
covered by a sheet of gutta percha or other plastic substance, and the latter is
backed up by plaster of Paris, on which the glass carrying the design is securely
embedded. Designs upon glass painted and protected according to my In-
vention may be inserted as panels in chimney pieces or walls, and applied to
all such purposes of decoration as the same are or may be applicable to.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Potts in the Great Seal Patent Office on the 3rd
August 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
POTTS, of Handsworth, in the County of Stafford, Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date, the Sixth day of February, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me;
the said William Potts, Her special licence that I, the said William Potts,
my executors, administrators, and assigns, or such others as I, the said
William Potts, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
PAINTING UPON GLASS; AND IN PROTECTING PAINTINGS UPON GLASS;" upon the
condition (amongst others) that I, the said William Potts, my executors or
administrators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calendar months
next and immediately after the date of the said. Letters Patent.
NOW KNOW YE, that I, the said William Potts, do hereby declare the
nature of the said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following state-
ment thereof, that is to say:-
My said Invention consists of the methods herein-after described of
painting upon glass, and of protecting paintings upon glass, so as to defend the
same from injury. In producing some of the paintings upon glass according

page_text: to my Invention, I lay on first a ground colour and then remove the marginal
colour from the outline of the design, by which means transparency of effect is
produced. I paint some portions of the same design on the face of the glass,
and other portions on the back of the glass, varying with the nature of the
design. By this method of painting upon glass effects are produced which
are unattainable by painting upon one side only of the glass.
I protect the painting by placing a sheet of glass upon the glass painted
upon, and with a marginal line of varnished paper or other material between
the two plates, which separation of the two glass plates produces additional
force of effect. I then hermetically seal round the edges with varnish or
cement. The back of the glass painted upon is covered by a sheet of gutta
percha or other plastic substance, and the latter is backed up by plaster of
Paris, on which the glass carrying the design is securely embedded.
Designs upon glass painted and protected according to my Invention may
be inserted as panels in chimney pieces or walls, and applied to all such
purposes of decoration as the same are or may be applicable to.
Having now described the nature of my Invention, and the manner of
carrying the same into effect, I wish it to be understood that I claim as my
Invention of improvements in painting upon glass, and in protecting paintings
upon glass,
Firstly, removing the colors from around the designs, as herein-before
described.
Secondly, painting on both sides of the glass to produce one design, as
herein-before described.
Thirdly, the separation of the glass plates by marginal strips of paper or
other material, as herein described.
Fourthly, hermetically sealing, for protection of the paintings, by varnishing
the marginal strips interposed between the glass plates, and varnishing the
outer edges of the glass plates, as herein before described.
In witness whereof, I, the said William Potts, have hereunto set my
hand and seal, this Second day of August, in the year of our Lord One
thousand eight hundred and fifty-eight.
Witness,
JOSEPH CHA POTTS.
WILLIAM POTTS. (L.S.)