A New or Improved Syphon and Test Box for Testing Gas Mains and for other Purposes.
Year: 1888

page_text: Date of Application, 27th Dec., 1888
Complete Specification Left, 25th Sept., 1889-Accepted, 21st Dec., 1889
PROVISIONAL SPECIFICATION.
A New or Improved Syphon and Test Box for Testing Gas Mains
and for other Purposes.
I, ROBERT GOOD, Manager of the Gas Works, Carshalton, in the County of Surrey
do hereby declare the nature of this invention to be as follows:-
This invention has mainly for its object to form the syphon and test boxes on gas
mains in such a manner that they offer no obstruction to the flow of gas through the
mains. To effect this I close over the syphon box with a cover preferably in the form
of an ordinary roof and with a pipe passing from each of the two sloping sides of
the roof inclining upwards and curved at its upper end so that the ends of the two
pipes are brought into a horizontal position and in a line with one another to allow of
their being joined up with the pipes forming the mains. Gas passing along one
main and through one of the inclined pipes into.the syphon box will pass unimpeded
through the other inclined pipe into the next length of the main."
When a length of main is to be tested the testing boxes at its two ends are filled
with water until the water rises above the top of the openings from the roof of the
test box into the inclined pipes.
A small branch pipe rises from each inclined pipe and to these branch pipes
the inlet and outlet pipes of a meter or indicator are coupled when a test is to
be made.
The pipe for pumping out and filling up the syphon and test box is taken through
the centre of the top of the roof cover.
-
The ordinary syphon boxes can be altered to this principle by simply removing the
old covers and fixing new roof covers to them formed as above described.
Water may accumulate in the syphon box to some distance above the lower part of
the roof shaped cover without impeding the flow of gas through the main.
It can be pumped out whenever requisite from the box through the syphon pipe in
the ordinary way.
A pipe may be led off from the gable end of the roof cover to a lamp to serve as
an indicator and shew when it is necessary to pump off the water.
In place of the cover being of a roof form it might be flat and the two pipes
rising from it be curved in opposite directions one to the other to bring them
into a horizontal position and in a line one with the other T piece and crossway
syphons and test boxes may be constructed in a similar manner.
Dated this 27th day of December 1888
COMPLETE SPECIFICATION.
A New or Improved Syphon and Test Box for Testing Gas Mains
and for other Purposes.
I, ROBERT GOOD, Manager of the Gas Works, Carshalton, in the County of
Surrey, 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 has mainly for its object to form the syphou and test boxes on

page_text: cover
gas mains in such a manner that they offer no obstruction to the flow of gas
through the mains. To effect this I close over the syphon box with a
preferably in the form of an ordinary roof and with a pipe passing from cach of
the two sloping sides of the roof inclining upwards and curved at its upper
end so that the ends of the two pipes are brought into a horizontal position and
in a line with one another to allow of their being joined up with the pipes forming
the mains. Gas passing along one main and through one of the inclined pipes into
the syphon box will pass unimpeded through the other inclined pipe into the next
length of the main.
When a length of main is to be tested the testing boxes at its two ends are filled
with water until the water rises above the top of the openings from the roof of the
test box into the inclined pipes.
A small branch pipe rises from each inclined pipe and to those branch pipes
the inlet and outlet pipes of a meter or indicator are coupled when a test is to
be made.
The pipe for pumping out and filling up the syphon and test box is taken through
the centre of the top of the roof cover.
The ordinary syphon boxes can be altered to this principle by simply removing the
old covers and fixing new roof covers to them formed as above described.
Water may accumulate in the syphon box to some distance above the lower part of
the roof shaped cover without impeding the flow of gas through the main.
It can be pumped out whenever requisite from the box through the syphon pipe in
the ordinary way.
A pipe may be led off from the gable end of the roof cover to a lamp to serve as
an indicator and shew when it is necessary to pump off the water.
In place of the cover being of a roof form it might be flat and the two pipes rising
from it be curved in opposite directions one to the other to bring them into a
horizontal position and in a line one with the other. T piece and crossway syphons
and test boxes may be constructed in a similar manner.
In order that my said invention may be more fully understood and readily carried
into effect I will proceed to describe the drawings hereunto annexed.

page_text: 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 I am aware
of the Specification of Letters Patent No. 4721 of 1886 granted to John Henry Lyon,
and I wish it to be understood that I do not claim anything described and claimed
therein but what I claim is.-
1. Syphon and test boxes for testing gas mains and for other purposes in which the
ends of the inlet and outlet mains are inclined or bent downwards and connected to
the roof of the box substantially as described.
2. Syphon and test boxes for testing gas mains and for other purposes substantially
as described and shown in figures 1 and 2.
3. Syphon and test boxes for testing gas mains and for other purposes substantially
as described and shown in Figures 3 and 4.
Dated this 23rd day of September 1889.