Year: 1886

page_text: Date of Application, 31st May, 1886.
Complete Left, 26th Feb., 1887.
Complete Accepted, 29th Mar., 1887.
I ROBERT GOOD of the Gas Works, Carshalton in tho County of Surrey Engineer
and Manager do hereby declare the nature of this invention to be as follows:-
The main may be made of cast or wrought iron and is formed with the bottom
sloping downwards from its two ends to its centre and also sloping downwards from
front to back whereby the tar and other heavy matters are brought to one point at the
centre of the main and are lead off through a pipe or passage rising upwards from an
orifice formed at this point. The level at which the tar is allowed to overflow from
this pipe or passage into the tar outlet pipe is controlled by a sliding valve which can
be raised or lowered according to the height at which it is desired to maintain the
level of the liquid.
The inspection openings at the top of the main are fitted with seal boxes which dip
say about 1 inch deeper into the liquid in the main than the gas dip pipes-whereby
the coverings or plugs of the openings can be removed without the gas escaping and
by this means the main can be cleaned or examined at any time while in full work.
By constructing the main in the above manner the heavy matters are brought to
one point in the centre and can easily be removed without the main being thrown out
of work and also a greater amount of surface is obtained with much less quantity of
liquid than is used in the mains at present in use and thereby the seal of the dip pipes
can be reduced with safety to a very low point say to an inch or less.
Dated this 31st day of May 1886
CARPMAEL & Co.,
Agents for the Applicant.

page_text: I, ROBERT GOOD of the Gas Works, Carshalton in the County of Surrey, Engineer
and Manager, 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
by the following statement :-
The main may be made of cast or wrought iron and is formed with the bottom
sloping downwards from its two ends to its centre and also sloping downwards from
front to back whereby the tar and other heavy matters are brought to one point at the
centre of the main and are led off through a pipe or passage rising upwards from an
orifice formed at this point. The level at which the tar is allowed to overflow from
this pipe or passage into the tar outlet pipe is controlled by a sliding valve which can
be raised or lowered according to the hoight at which it is desired to maintain the
level of the liquid.
The inspection openings at the top of the main are fitted with seal boxes which dip
say about one inch deeper into the liquid in the main than the gas dip pipes whereby
the coverings or plugs of the openings can be removed without the gas escaping and
by this means the main can be cleaned or examined at any time while in full work.
By constructing the main in the above manner the heavy matters are brought to one
point in the centre and can easily be removed without the main being thrown out of
work and also a greater amount of surface is obtained with much less quantity of
liquid than is used in the mains at present in use and thereby the seal of the dip
pipes can be reduced with safety to a very low. point say to an inch or less.
The drawings hereunto annexed shew various views of a hydraulic main formed as
above described. Figure 1 is a plan view. Figure 2 is a vertical section on the
line A B Figure 1, and Figure 3 a vertical section on the line CD. Figure 4 is a
vertical cross section taken through one of the gas dip pipes, and Figure 5 a vertical
cross section through the valve which controls the overflow of tar.
A is the body of the main with the bottom sloping from the front and ends to the
centre of the back. B. an opening formed through the bottom of the back at the
centre. Ca passage rising up in rear of the back from this opening. Dan overflow
outlet from the upper part of this passage into a receptacle E from which the tar
which overflows is led away by the tar outlet pipe F. G is a sliding valve which can
be raised or lowered by a rod which passes out from the top of the receptacle E
through a stuffing box H. I is a plunger carried by a rod which passes out from the
top of the passage C through a stuffing box J. It can either be drawn up into the
position shewn in Figure 5 or can be lowered to agitate the tar in the passage C if
required.
KK are the gas dip pipes by which the gas is led into the main from the retorts.
LL are inspection openings from which scal boxes M descend into the liquid in the
main about 1 inch deeper than the gas dip pipes. N are coverings or plugs with which
the openings are fitted as usual.

page_text: O are three openings to any one or other of which a gas outlet pipe can be applied.
P is a gas outlet shewn to be applied to the central opening.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :—
1. A hydraulic main with the bottom sloping downwards to an outlet opening from
which a passage rises upwards and forms an outlet for the tar which collects
substantially as described.
2. The construction of hydraulic mains substantially as herein before described and
illustrated in the drawings annexed.
3. Fitting the inspection openings of hydraulic mains with seal boxes which descend
into the liquid in the main to a greater depth than the gas dip pipes.
רו
1000
CARPMAEL & Co.,
Agents for the Applicant.