Improvements in and connected with Jacketted Glass Tubes and Glass Vessels.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Jacketted Glass Tubes and
Glass Vessels.
I, Wilhelm SeUME, Factory Owner, of 25, Bautzener Strasse, Dresden, in
the Kingdom of Saxony, 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 :-
Pipe conduits of iron, lead, cement, earthenware etc. as usually made, have the
drawback, that they are gradually corroded by liquids containing acids or other
active chemicals, or that they offer a considerable frictional resistance to the water
passing through the pipes.
My invention relates to pipes which have a glass core and a jacket or protective
coating of stronger material, and which are therefore calculated to resist external
mechanical influences, as well as the chemical action of liquids or gases passing
through the said pipes.
3
In the accompanying drawing,
Fig. 1 is a partial section of a coated glass pipe embodying my invention.
Fig. 2 illustrates a method of connecting the ends of adjoining tubes.
The core is made of strong glass which has been cooled very slowly in the
course of its manufacture and subsequently treated by boiling in water and solutions
of chemicals in such a manner, as to become almost completely indifferent to
ordinary changes of temperature.
To protect this tube against mechanical influences, it is coated with a layer or
layers of insulating material, u
tube t of earthenware or other suitable material, as indicated by Fig. 2.
as indicated by Fig. 1, or surrounded with a
In the first case the coating is preferably made of jute, tow, hemp, or paper
stuff, or of a combination of such fibrous materials, impregnated with a suitable
binding substance, and the adhesion between the core and the jacket is improved
or the connection secured, by providing the glass core with a helical rim or ridge,
or with parallel collars, as illustrated by Fig. 1.
In Fig. 2 two glass tubes g g or cores are joined together by means of ordinary
socket and spigot ends and a suitable packing d. To increase the adhesion between
the glass pipes and the packing d placed between the same, the ends of the pipes,
that is the inside of the socket piece and the corresponding outer surface of the
inner pipe, are roughened by the sand blast or other suitable process.
The packing material d is an adhesive mixture of asphalte and silicates, said
mixture having the property of becoming very hard and completely insoluble.
The process for the manufacture of jacketted glass tubes as described above,
s applicable also for the manufacture of glass vessels provided with a protective
oating.
Having now particularly described and ascertained the nature of my invention
nd in what manner the same is or may be performed, I wish it to be understood,
hat I am aware of the existence of glass lined metal tubes prior to the date of this
pplication, and that I do not generally claim the manufacture of jacketted glass
ubes; but what I claim is ;-
1. The improvement in the manufacture of jacketted glass tubes and vessels,
hich consists in causing the glass to cool very slowly, subsequently boiling the
lass in suitable liquids, and finally applying a protective jacket.
2. A jacketted glass tube or glass vessel, in which the glass core is provided with
elical or annular ridges or collars, in order to increase the adhesion between the
ore and the jacket.

page_text: 3. A glass pipe joint formed by an internally roughened socket end, an
externally roughened pipe end, and packing substance containing a mixture of
asphalt and silicates.
Dated this 14th day of March 1893.
FAIRFAX & WETTER,
433, Strand, London, Agents.