IMPROVEMENTS IN. ADJUSTABLE DIP-PIPES AND THEIR APPENDAGES, USED IN THE MANUFACTURE OF GAS
Year: 1885

page_text: I, SAMUEL BROTHERS DARWIN of the Gas Works, Portsea, Hampshire, Civil
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN.
ADJUSTABLE DIP-PIPES AND THEIR APPENDAGES, USED IN THE MANUFACTURE OF
GAS," and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, reference being had to the
accompanying drawing and to the letters, and figures marked thereon, that is
to say-
This invention has for its object the construction of dip-pipes and their
appendages by the use of which the pressure to which the retorts are subjected
when making gas may be regulated or relieved from entirely according to the will
of the operator.
The accompanying drawing represents a transverse sectional elevation of the
bydraulic main, dip-pipe, float, float-box and other appendages.
The invention consists in attaching to the hydraulic main A, the dip-pipe B, B,
which is made in two parts, connected together at C, and has the lower part turned
up so as to form an annular cup D. Surrounding this cup there is an annular
cylinder E, the inner portion of the annulus dipping into the cup D, while the
outer portion dips into the liquid in the hydraulic main. The cylinder or valve is
suspended by a rod F, the bottom end of which is fastened to a strap G, and the
upper part to a float H which is contained in a float-box or tank I, fixed to the top
of the dip-pipe.-J is a wheel over which passes a chain, one end supporting the
rod F and the other end a number of counterpoise weights K.-L is a pipe for
supplying the float tank with liquid and M is a pipe for similarly supplying with
liquid the cup D.-N is a part of the H pipe and O is a pipe for conveying away
the gas, tar, and liquor from the hydraulic main, a valve being inserted at P.-
Q is a screw for adjusting the height beyond which the cylinder or valve E cannot
rise.
The action of the apparatus is as follows. Liquid is supplied to the bydraulic
main and to the float tank and annular cup D by the pipes L and M.-Weights K
are attached to the extremity of the chain that passes over the pulley J sufficient
or nearly sufficient to counterpoise the annular cylinder or valve E, and on gas
flowing from the retort to the dip-pipe it will exert a pressure on the underside of

page_text: the crown of the float and raise the cylinder E surrounding the dip-pipe until it
touches the bottom of the screw Q, when the cylinder valve or dip will be either
entirely withdrawn from the liquid in the hydraulic main, or so much so only as to
give the requisite working seal or dip. On the retort being opened and gas ceasing
to flow, the pressure from the under side of the crown of the float will be removed
and the cylinder E will consequently fall until it is securely sealed from the return
of gas from the hydraulic main.
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 The construction of dip-pipes with the appendage E attached to the dip-pipe
as herein described and shown on the drawing.
2. The attachment of a tank I to the top of each dip-pipe, as herein described
and shown on the drawing.
3. The construction and application of a float H to each dip-pipe, as herein
described and shown on the drawing.