An Improved Construction of Connections for Glass or Porcelain Lined Metal Tubing.
Year: 1889

page_text: Date of Application, 22nd Aug., 1889
Complete Specification Left, 22nd May, 1890-Accepted, 16th Aug., 1890
PROVISIONAL SPECIFICATION.
An Improved Construction of Connections for Glass or Porcelain
Lined Metal Tubing.
We, HENRY DUDLEY-COOPER, of 3 Dyers Buildings, E.C. Manufacturer of glass
line metal tubing, and JAMES SELBY of 14 Gough Street, East India Road E.,
Mechanic, do hereby declare the nature of this invention to be as follows:---
This invention relates chiefly to the construction of glass lined T piece metal joints
for connecting lengths of glass lined tubing.
According to this invention we first take a straight length of glass tube having a
hole in or near the middle with a projecting rin or flange round the hole, the outside
of which rim is ground similar to glass stoppers.
This piece of glass tube is placed through an ordinary iron T piece with the hole turned
up to the angle part; a second piece of straight glass tube internally ground at one
end is passed through the angle part of iron T piece and fitted on or in to the projecting
rim of the other piece, thereby forming a glass T piece within the metal one.
The diameter of the glass is less than the internal diameter of the metal part the
difference of the two diameters being filled in with suitable cement to hold the glass
truly central in the metal part and prevent the fitted on piece from shifting. To
further secure the joint of the two pieces of glass a strong or acid proof cement may
be applied around the joint.
Dated this 22nd day of August 1889.
FREDERIC PRINCE,
Agent for Applicants.
COMPLETE SPECIFICATION.
An Improved Construction of Connections for Glass or Porcelain
Lined Metal Tubing.
We, HENRY DUDLEY-COOPER, of 3 Dyers Buildings E C., Manufacturer of glass
lined metal tubing, and JAMES SELBY, of 14 Gough Street East India Road, E.
Mechanic, 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 :-
To enable our invention to be properly understood we will proceed to describe the
same with aid of the accompanying drawings.
Figure I plan view of T piece complete.
Figure II section of same on line X. Y.
Figures III & IV sectional views of the glass or porcelain lining.
A is the usual form of iron, T piece used to connect gas and water pipes, this is
lined with glass or porcelain in the following manner. A piece of glass tube B of less
diameter than the interior of A is formed with a central rim or lip C, ground preferably
on the outside, upon this rim fits a short length of glass tube D. having the bottom E
internally ground to fit on C. The piece B as at figure IV is first passed through the
iron T, A the lip part coming under the bottom of angle part A' then the short
piece D is passed through A' and fitted on to lip C, the space between the outside of
glass and inside of A, being filled in with cement F to hold the glass central and secure
part D froin shifting. The joint of the two pieces of glass could be further secured
if desired, by any suitable strong cement.
of Portland cement and plaster of Paris.
is placed in an oven to bake the cement
ground to bring the glass, cement, and
The cement F, may consist of a mixture
After this has been introduced the I piece
hard, and the three mouths of the T piece
metal perfectly flush and square. The
ED

page_text: connection with a pipe is made with a union screw cap in the usual way, a suitable
washer being placed between the T piece and pipe. If desired, the piece D, could
fit inside C instead of outside.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The method of lining metal T pieces with glass or porcelain, herein before described,
consisting of making the lining in two pieces, and fitting one on to the other, and
securing the same in the metal part by cement, as illustrated by the accompanying
drawings.
Dated this 22nd day of May 1890.
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, W.C., Agent for Applicants.