AN IMPROVED APPARATUS TO BE EMPLOYED IN RELIEVING THE PRESSURE IN CAS RETORTS
Year: 1876

page_text: LETTERS PATENT to John Moore, of Wolverhampton, in the County of
Stafford, Gas Retort Setter, for the Invention of "AN IMPROVED APPARATUS
TO BE EMPLOYED IN RELIEVING THE PRESSURE IN CAS RETORTS."
Sealed the 30th May 1876, and dated the 21st January 1876.
PROVISIONAL SPECIFICATION left by the said John Moore at the Office of
the Commissioners of Patents on the 21st January 1876.
JOHN MOORE, of Wolverhampton, in the County of Stafford, Gas Retort Setter.
AN IMPROVED APPARATUS TO BE EMPLOYED IN RELIEVING THE PRESSURE IN
GAS RETORTS."
One side of that part of the dip pipe which is within the hydraulic main is formed
flat. The said flat part is faced on the outside, and a faced slide valve is made to
slide vertically thereon, and is carried in V's or other suitable guides cast to the said
dip pipe, or otherwise conveniently fixed, and of such shape and arrangement as to
keep the valve up to its face, as will be readily understood. The valve slides over
an opening or port formed in the flat part of the dip pipe, and above the level of
the water in the hydraulic main. A valve spindle, which is connected at its lower
end to the said valve, passes up through a stufling box, the said stufling box being
preferably cast upon the flange of the dip pipe which connects the dip pipe with the
lid of the hydraulic main. The top of the said valve is connected to a lever so
arranged with a weight at one end, and a vertical rod passing down in front of the
retort bed at the other, that the weight acts to close the valve by pushing down
the said valve when the rod is free, and the valve is opened by pulling down the
rod, and thus raising the valve. A stop is provided to prevent the valve descending
below the proper point, and a suitable catch or hook is provided to retain the lower
end of the rod when the valve is required to be open.
When the valve is raised (by pulling down the rod) the said port is opened, and
the gas can pass freely from the retort direct into the hydraulic main without
When the valve is lowered (by means
passing through the water in the said main.
of the weight when the rod is released) the said port is closed, and the gas from the
retort must pass through the water in the usual way. By this arrangement it is
not necessary to unseal the bottom of the dip pipe when the pressure in the retort
is to be relieved.

page_text: Figure is an elevation of a dip pipe fitted with a valve, and is a view shewing
the back of the valve, that is, a side elevation of the dip pipe; Figure 2 is a section
on line a, b, of Figure 1; and Figure 3 is a section on line c, d, of Figure 1, but
shewing the valve in section. The same letters when occurring on different views
indicate the same parts.
A is the part of the dip pipe within the hydraulic main; B, the flat side, which
may be rounded below the bottom of the slides, and may be lightened out above
the port for the width between the nearest edges of the slides, and as shewn in
section in Figure 2, so as to leave suflicient sliding surface above the port for the
valve; C is the opening or port; D, the valve; E, E, the slides, which are rebated
to receive the side edges of the valve, as best illustrated in Figure 3. The slides
E, E, are shewn.screwed to the valve face or flat part. F is the valve spindle; G,
the lever, which works on a centre H carried in an arm cast to the dip pipe. The
lever is connected to the valve spindle F by means of links, and is provided at one
extremity with a weight K, and at the other with a chain L; M is the flange of
the dip pipe which connects it to the hydraulic main; N is a stufling box and
gland, through which the valve spindle passes; O is a stud pin screwed into the

page_text: valve face below the port C to act as a stop to the valve when closed, and to prevent
it from falling in case of the spindle becoming fractured. When the valve is pulled
up the inside link (see Figure 2) is shewn to come against the under side of the dip
pipe socket P, and thus form a stop.
The action will be readily understood. In Figures 1 and 2 the valve is shewn
raised, and the gas can pass direct from the retort into the hydraulic main
without passing through the bottom of the dip pipe, which is sealed in the
usual way.
When the bottom of the chain L is unfastened from a hook which holds it the
weight K pushes down the valve on to the stop O, and closes the port C, when the
gas from the retort must pass out at the bottom of the dip pipe, and consequently
through the water seal, and no gas can pass from the hydraulic main into the retort
whilst the latter is being charged.
In Figure 1 the lever and valve, and in Figure 2 the valve are shewn by dotted
lines in the position they take when the port is closed.
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 I
claim,
1st. The valve D applied to that part of the dip pipe which is within the
hydraulic main, substantially as and for the purpose described and shewn.
2nd. The mechanism for working the said valve, substantially as and for the
purpose described and shown.
And I declare that I do not limit myself to the exact modification as shewn, as
such is not necessary to the utility of the Invention, and many obvious modifications
will readily suggest themselves to a mechanician on consideration of this Specifica-
tion and Drawing.
In witness whereof, I, the said John Moore, have hereunto set my hand and
seal, this Seventh day of July, in the year of our Lord One thousand eight
hundred and seventy-
Witness,
JAMES A. WYNN,
Clerk to Stephen Watkins,
Patent Office,
Wolverhampton.
JOHN MOORE. (L.S.)