Year: 1888

page_text: Date of Application, 30th July, 1888
Complete Specification Left, 25th Apr., 1889
Complete Specification Accepted, 8th June, 1889
[ HERBERT JOHN HADDAN of the firm of Herbert & Co. Patent, Agents 18
Buckingham Street Strand W.C. London in the County of Middlesex do hereby
declare the nature of this invention a communication to me from abroad by Tho
Josephine Glass Works of Count' Schaffgotsch of Schreiberhan in the Empire of
Germany to be as follows:-
The object of this invention is to manufacture in one melting a transparent massive
glass of a red colour so that objects may be made therefrom direct from the pot, in
massive glass without flashing, and without a second heating being necessary to bring
out the color.
To this end the following known materials are employed but in new proportions
Quarz sand, Minium, Carbonate of Potash, Phosphate of Lime, bitartrate of potash,
borax, protoxyde of copper and binoxide of tin or putty. These materials have
heretofore been used but the invention consists in employing only about a three-
hundredth part of protoxyde of copper and a hundred and fiftieth part of putty powder,
in the mixture so that a glass suitable for massive work is obtained and one that is
of the required color after but one melting.
The mixture is melted in an open pot and when finished made into articles of the
required form direct therefrom. Any after heating of the articles has no effect on
the ruby colour obtained in first instance.
HERBERT & Co.,
Agents to Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Red Glass.
I HERBERT JOHN HADDAN of the firm of Herbert & Co., Patent Agents, of 18.
Buckingham Street, Strand, W.C. London in the County of Middlesex, Civil Engineer
do hereby doclare the nature of this invention a communication to me froin abroad
by The Josephine Glass Works of Count Schaffgotsch of Schreiberhau in the Empire
of Germany and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
The object of this invention is to manufacture in one melting a massive glass of n
transparent red colour so that objects may be made therefrom direct from the pot in
massive glass without flashing and without a second heating being necessary to bring
out the colour.
The invention consists principally in making said glass with red oxide of copper
and binoxide of tin (or putty powder) in certain proportions to the other ingredients
or to the main-ingredient the silica-to-effect-the desired. result these proportions being
9 parts of red oxide of copper and not more than 13 paris nor less-than-8-parts of
binoxide of tin (or putty powder) to the same quantity to each 2000 parts of fine sand.
In carrying this invention into practice the following mixture is prepared and
melted in an open not.

page_text: With the mixture above described the proportion of the red oxide of copper to the
sand is of the greater importance for if the quantity of the red oxide of copper difters
in this proportion by more than one part by weight from the proportion given, the
attainment of a good result would be prevented. A larger margin is left for the
quantity of binoxide of tin (or putty powder) but no useful copper ruby glass is made
with less than eight parts by weight of tin putty to 2000 parts by weight of sand.
Having now particularly described and ascertained the nature of the said
invention and in what mannor the same is to be performed I declare that what I
clain is-
. 1. The method of manufacturing red glass or objects consisting of transparent
massive red glass, consisting in preparing a mixture suitable for making glass and
containing red oxide of copper and binoxide of tin (putty powder) in proportion to
the sand or equivalent as set forth melting said mixture and forming said glass or
objects from the glass so made direct from the pot.
2. The mixture or combination of the ingredients in proportions as set forth adapted
by one melting to form a massive red glass for the purpose described.
11000
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.