Improvements in the Manufacture of Glass or Porcelain-lined Metal T Pieces for Connecting Lengths of similarly Lined Piping.
Year: 1889

page_text: Date of Application, 4th Jan., 1889
Complete Specification Left, 21st Mar., 1889-Accepted, 11th May, 1889
PROVISIONAL SPECIFICATION:
Improvements in the Manufacture of Glass or Porcelain-lined
Metal T Pieces for Connecting Lengths of similarly Lined
Piping.
I, HENRY DUDLEY COOPER, of 3 Dyers Buildings, London, E:C., manufacturer,
do hereby declare the nature of this invention to be as follows:-
The glass or other lining is first prepared in the shape of the T piece, and then
covered with metal as.horeafter. described. I first take. a piece of metal pipe of the
length of the T piece, and form a right and left hand screw on the same from each
end, to near the middle; then cut a round piece out of the middle leaving a hole
rather larger than the diameter of the glass; then cut the piece of pipe in half
through the middle.of. the hole, so forming. two pieces,, these pieces are then placed
on the length of the glass T, the hole part passing round the angle part,, enables
the pieces to come close: together then prepare a shorter length of piping by
screwing on the outside and forming one end so that when this piece of pipe is placed
on the angle part of the glass T, the prepared end will fit over the hole in the otlior
two pieces. These three pieces are held close together by bolts passing through with
outside nuts the glass being held truly central by washers on the ends of tlie bolts.
The T piece so prepared has the joints of the pieces of piping made tight by clay,
and is then placed in a suitable mould, and molten metal cast round the pieces of
piping thus securing the whole firmly, together.. After removal from the mould the
runners and fins are removed in the usual way, and a suitable cement introduced in
between the glass and the metal to hold the former. off of the latter; the. T. piece is
then put into an oven to bake the cement hard, after which the ends are ground to
bring the metal: cement and glass perfectly, flush. By holding, the. glass, off: the
metal pipe pieces while casting the molten metal around, prevents the glass. from
cracking by the heat:
ր T
1000
•
FREDERIC PRINCE;
Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Glass or Porcelain Lined
Metal T Pieces for Connecting Lengths of similarly Lined
Piping.
I, HENRY DUDLEY COOPER, of 3 Dyers Buildings, London, E.C., Manufacturer of
glass lined metal piping, 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 :—
This invention relates to certain improvements in the manufacture of glass lined
metal pieces described in the specification of Patent No. 3907 of 1887, granted
to Thomas Ernest Halford and Robert Morant whereby the construction of the
said pieces is cheapened and improved.
In the construction of the T pieces according to the above specification, the glass
or porcelain part requires to be first covered with asbestos cloth or other material
that is a non conductor of heat to prevent the heat of the molten metal from cracking
the glass when the casting round takes place. The use of this asbestos or other
coating I am enabled to dispense with by holding the glass off the metal parts while
the molten metal is being cast round. By this means after the casting a cement can
be introduced between the glass and metal which is cheaper and more suitable than
the asbestos or other packing, and admits of the ends being better finished for
forming the connection with piping. In arranging the short pieces of tubing to fit
over the glass according to the aforesaid specification, each piece is fitted to the other
and to the glass by filing rendering a good joint troublesome to make. By my
plan of making these pieces practically no fitting is required, while the best joint
possible to be made is obtained.
To enable my invention to be properly understood, I will proceed to describe the
same with aid of the accompanying drawings.
DESCRIPTION OF THE DRAWINGS.
Figure 1, outside view of T piece completed.
Figure 2, section of same.
Figure 3; partial view of parts embodied in figure 2 arranged to be placed in
mould to have molten metal cast round.
Figure 4, detached view of the glass or porcelain part previous to being covered
by metal..
T
:
Figure 5, view of mode of constructing parts embodied in previous figures.
Figure 6, view of a part embodied in figures 1, 2 and 3. A, represents a glass or
porcelain piece,previous to being covered by metal; C, D, E, the pieces of tube
for covering the glass A, formed to fit round the glass in the following manner.
A piece of tube as at figure 5, externally screw threaded, preferably with right and
left handed threads, has a piece B, cut out-in-the-middle of the tube but not through
the tube, the size of this hole is somewhat larger than the diameter of, the glass T,

page_text: the tube is then cut in half at a, b forming two separate parts C, D, these are fitted
on the longitudinal part of the glass T, and another part E, figure 6, placed on the
angle part of the glass T, the prepared end of this part E corresponds to and closes
up the hole B, in the pieces C, D. In making these pieces E a length of tube as
at figure 5, has a hole B cut right through the tube, which is afterwards cut in half
through the centre of the hole. When these pieces (, D, E, are fitted upon the
glass T, the joint ends may have a thin layer of clay between to make the joint
perfectly tight; these three pieces are then held tight together by the bolts F, F₁,
passing through the glass, and secured on the outside by nuts F, and a washer H,
with inner flange H', which comes between the outside of glass and inside of tube,
thereby holding the glass clear off the pieces C, D, E. The bolt F¹, screws into
bolt F. The whole as at figure 3, is then placed in a mould and the pieces C, D, E,
secured together by molten metal G, being cast round, as at figure 1. The molten
metal used must be of a kind that is fusible at a low temperature, such as white metal.
After casting a suitable cement I-which can be made of a mixture of Portland
Cement and Plaster of Paris-is forced in between the glass and metal to hold the
former off the latter; the T piece is then baked in an oven to harden the cement,
and afterwards finished by the runners and fins being removed, and the shoulders
turned up, and the ends ground to bring the metal, glass, and cement, quite flush
and square. In forming connections with pipes a suitable washer is placed between
the end of the T piece and that of the pipe, and the two connected and drawn
together by a usual screw cap.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. The improved manner of making the parts C, D, E, so that they may
accurately fit together over the glass, as herein described and illustrated in the
accompanying drawings.
2. In the construction of metal glass or porcelain lined T pieces, the use of the
bolts F, and F, and washers H, and nuts 2, to hold the pieces C, D, E, together,
and to hold the glass off same while the molten metal is being cast round, as described
and illustrated in the accompanying drawings.
3. The improved construction of metal glass or porcelain lined T pieces, as
described and illustrated in the accompanying drawings.
Dated this 21st day of March 1889.
FREDERIC PRINCE,
.1, Quality Court, Chancery Lane, W.C.,
Agent for Applicant.