IMPROVED MEANS FOR PREVENTING STOPPAGES IN the ASCENSION PIPES IN THE MANUFACtúre of coal GAS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I, HENRY EDWARD NEWTON of the Office for Patents, Breams Buiklings
Chancery Lane in the County of Middlesex, Civil Engineer, do hereby declare the
nature of my invention for IMPROVED MEANS FOR PREVENTING STOPPAGES IN the
ASCENSION PIPES IN THE MANUFACtúre of coal GAS to be as follows:-
In the manufacture of coal gas stoppages frequently occur in the ascension pipes
caused by the deposit of tar and fine coal and dust which collect therein.
Now the object of this invention is to prevent such stoppage of the ascension
pipes, and this is effected by causing a certain amount of stagnation of the gas in
the retorts.
In carrying out this invention a projecting plate or feather is employed which
may be cast on, so as to be pendent from, the top part of the mouthpiece."
This plate causes a certain quantity of the gas to stagnate in the retort and
this stagnant gas serves as an isolater, separating the hot retort wall from the
carbonizing coal, so that much of the heat of the retorts is prevented from passing
off with the gas, that is to say, the gas will not be overheated but will ascend in
the ascension pipes at a comparatively low temperature with its tar and water
vapours.
Or this projecting plate or feather may be placed inside and made in one with
the clay retort; or a plato or lid may be hinged to the inlet of the ascension pipe;
or otherwise arranged so that it may be turned up or down, or may be taken out
before drawing the retorts.

page_text: COMPLETE SPECIFICATION.
I HENRY EDWARD NEWTON of the Office for Patents 6 Broams Buildings,
Chancery Lane in the County of Middlesex, Civil Engineer do hereby declare the
nature of the invention for "IMPROVED MEANS FOR PREVENTING STOPPAGES IN
THE ASCENSION PIPES IN THE MANUFACTURE OF COAL GAS," and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
In the manufacture of coal gas, stoppages frequently occur in the ascension pipes
such stoppages being caused by the deposit of tar and fine coal and dust which
collect therein.
Now the object of this invention is to prevent such stoppage of the ascension
pipes and this is effected by causing a certain amount of stagnation of the gas in
the retorts.
In carrying out this invention, a projecting plate or feather is employed which
may be cast on so as to be pendent from the top part of the mouth piece.
This plate causes a certain quantity of the gas to become stagnant in the retort,
and this stagnant gas serves as an isolator, between the hot retort walls and the
coal which is being carbonized so that much of the heat of the retorts is prevented
from passing off with the gas that is to say so much heat cannot enter from the
retort into the gas chambers and the gas will not be overheated, but will ascend in
the ascension pipes at a comparatively low temperature with its tar and wator
vapours.
Or this projecting plate or feather may be placed inside and made in one with
the clay retort, or a plate or lid may be hinged to the inlet of the ascension pipe or
otherwise arranged so that it may be turned up or down or may be taken out
before drawing the retorts.
In the accompanying drawing
Fig: 1 shows in longitudinal section a gas retort with the plate or feather
applied at a to the inouth piece and
Fig: 2 shows in similar section at 6 the equivalent for the same made insido and
in one with the retort.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed as communicated to
me by my Foreign Correspondent I declare that what I claim is
As means for preventing stoppages in the ascension pipes used in the manufacture
of coal gas the formation of a cushion of stagnant gas in the mouth of the retort S
which serves as an isolator between tho hot walls of the retort and the fuel as
herein described.
Dated this onl 100K