Improved Means and Apparatus for Applying Gas Bags to Gas Mains and the like.
Year: 1892

page_text: Date of Application, 2nd May, 1892
Complete Specification Left, 31st Jan., 1893-Accepted, 18th Mar., 1893
PROVISIONAL SPECIFICATION.
Improved Means and Apparatus for Applying Gas Bags to
Gas Mains and the like.
I, JAMES MILNE, of Milton House Works, Edinburgh, in the County of
Midlothian, North Britain, Engineer, (being a communication from abroad by
Edmund Francois Humbert Borias, Gas Works, Vitry-le-Francois, Gas Engineer)
do hereby declare the nature of this invention to be as follows:—
This invention relates to improved means and apparatus for applying gas bags to
gas mains and the like, and consists in the employment of special castings whereby
a gas bag may be used to shut off gas without opening up the ground, and is
especially applicable in the case of byepasses for exhausters, station meters,
governors, and such like, the valves of which are seldom used and are apt to become
stiff. The first cost is also in accordance with my invention greatly reduced.
In carrying out my said invention I preferably cast or otherwise form the gas
pipe with a bulge into which the bag is placed and expanded when it is desired to
shut off the gas, though, if desired, in some cases, the said bulge may be dispensed
with. The pipe or casting is provided with an upright branch of suitable diameter
for the introduction of the collapsed gas bag, the said branch is carried to the
surface of the ground and provided with a suitable movable cover preferably
enclosed within an ordinary street box. Small pipes may also be fitted on either
side of said branch, and led up to the street box where they are provided with
suitable covers, so as to allow of testing pressure, leakage, etc.
The pipe or casting may be made suitable for branches or crossings whereby by
the introduction of a gas bag each section may be isolated.
Dated this 20th day of & nril 1805
JOHNSONS,
115, St. Vincent Street, Glasgow, Petitioner's Agents.
COMPLETE
SPECIFICATION.
Improved Means and Apparatus for Applying Gas Bags to
Gas Mains and the like.
I, JAMES MILNE of Milton House Works, Edinburgh, in the County of
Midlothian, North Britain, Engineer (being a communication, from Edmund
Francois Humbert Borias, Gas Works, Vitry le Francois, Gas Engineer) 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 improved means and apparatus for applying gas bags to
gas mains and the like and consists in the employment of special castings whereby
a gas bag may be used to shut off gas without opening up the ground, and is
especially applicable in the case of bye-passes for exhausters, station meters,
governors and such like, the valves of which are seldom used and are apt to become
stiff. The first cost is also in accordance with my invention greatly reduced.
In carrying out my said invention I cast or otherwise form the gas pipe with a
V
bulge into which the bag is placed and expanded when desired, though in some
cases the bulge may be dispensed with. The pipe or casting is provided with an
upright branch pipe, carried up to the surface of the ground and provided with a
moveable cover preferably enclosed within an ordinary street box. Small pipes

page_text: may also be fitted on either side of said branch, and led up to the street box and
provided with covers, so as to allow of testing pressure, leakage and such like.
But in order that my said invention may be more readily understood, and easily
carried into effect, I will proceed to describe the same with reference to the
accompanying drawings.
Figure 1, is an elevation of one arrangement of my invention as applied to a two
way casting or pipe.
Figure 2, is a sectional elevation of same, showing bag expanded.
Figure 3, is a plan of the street box with cover removed.
Figure 4, is a plan of the two way casting or pipe. And
Figure 5, is an elevation of the collapsed gas bag with tube attached.
Referring to the said drawings I cast or otherwise form the pipe A with a bulge
or bulged portion B into which the bag D is placed and expanded when it is
desired to shut off the gas. The said bulged portion B is provided with an upright
branch pipe C, of suitable diameter for the introduction of the collapsed gas bag D
(Fig. 5,) and its inflating tube d, which is provided with a stop or other cock d¹ at
its top end as shown. The said pipe C is carried up to the surface of the ground
and provided with a movable cover-c preferably enclosed within an ordinary street
box E. Small pipes F, F' may also be fitted on either side of said branch pipe C.
and led up to the street box E where they are provided with suitable covers f, so
as to allow of testing pressure, leakage, and such like, by connecting them with a
portable test meter.
If desired I may connect the upright pipes to the main pipe itself and dispense
with the bulged portion. Also the pipe or casting may be made suitable for
branches or crossings whereby by the introduction of a gas bag each section may
be isolated.
The whole arrangement thus forms an efficient isolateur which may be readily
applied for testing pressure, leakage and such like and which may also be applied
in place of valves for bye-passes on station governors and meters.
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,―
1st. The method of applying gas bags to gas mains and the like, substantially as
and for the purposes, herein before described and shown in the accompanying
drawings.
2nd. In applying gas bags to gas mains and the like, the upright pipe C and its
connections, substantially as and for the purposes herein before described and shown
in the accompanying drawings.
Dated this 30th day of January 1802
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicant's Agents.