An Improved Instrument for Clearing Gas Retort Ascension Pipes.
Year: 1889

page_text: Date of Application, 9th Mar., 1889
Complete Specification Left, 6th Dec., 1889-Accepted, 11th Jan., 1890
PROVISIONAL SPECIFICATION.
An Improved Instrument for Clearing Gas Retort Ascension Pipes.
I, WILLIAM PARLBY of Hereford, in the County of Hereford, Engineer of the
Hereford Gas Works, do hereby declare the nature of this invention to be as
follows:-
When the ascension pipes of gas retorts become choked, by the adhesion of
carbonaceous matter to their interior sides it is usual to insert an instrument with
an augur shaped head into the mouthpiece end of the pipe, and by thrusting and
turning, or partially turning it to screw or force a passage through the obstructing
material. The form of the instrument at present, in ordinary use is however such
that it usually makes but a small hole which soon closes again, and renders necessary
a fresh application very shortly. The object of this invention is to so form the tool
that when used it not only makes a hole but clears away the objectionable deposit
and leaves the pipe with a full bore, thereby preventing the necessity for manipulating
with it again for a very considerable time."
To carry out this invention I make the instrument with a head still something
like that of an augur, but with two, three, four or more claws projecting from the
lower part of the head and so curved and formed that when the hole in the
obstruction is made the claws follow, and as the instrument is pulled out,
the obstructing material or substance is removed by the claws. The claws are so
spread as to extend to near the full internal diameter of the pipe, and the head
together with the claws, which are preferably made of steel are attached to a rod or
bar, either curved or cranked to suit the particular circumstances. When the tool
is withdrawn the pipe is therefore quite clear and fit for continued use.
By the application of this improved tool or instrument much labour and annoyance
is saved, and the operation of what is commonly known as
generally rendered unnecessary.
11
"
pipe-jumping" is
COMPLETE SPECIFICATION.
An Improved Instrument for Clearing Gas Retort Ascension Pipes.
I, WILLIAM PARLBY of Hereford, in the County of Hereford, Engineer of the
Hereford Gas Works, 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 :-
When the ascension pipes of gas retorts become choked by the adhesion of
carbonaceous matter to their interior sides, it is usual to insert an instrument with
an augur shaped head into the mouthpiece end of the pipe, and by thrusting and
turning, or partially turning it to screw or force a passage through the obstructing
material. The form of the instrument at present in ordinary use is however such
that it usually makes but a small hole which soon closes again, and renders
necessary a fresh application. The object of this invention is to so form the tool
that when used it not only makes a hole but clears away the objectionable deposit
and leaves the pipe with a full bore thereby preventing the necessity for manipulating
with it again for a very considerable time.
In order that the invention may be easily understood drawings are attached
hereto, Fig. 1 being an elevation of the tool, and Fig. 2 a plan of it, while Fig. 3
shows in side elevation a modification in form of one of the claws, Fig. 4 being a
CD27

page_text: front view of it. Fig. 5 is another modified form in side elevation, and Fig. 6 is
a front elevation of the same, while Fig. 7 is a further inodification of the claw in
side elevation. In each of the Figs. similar letters refer to the same parts.
To carry out the invention I make the instrument with a head A, still something
like that of an augur, but with two, three, four or more claws B projecting from
the lower part of the head in the manner shown, the whole being welded together
and forming a shank C. The claws are so curved and formed that when the hole
in the obstruction is made, the claws follow and as the instrument is turned about in
the pipe, and then pulled out the obstructing material or substance is removed by the
said claws, the claws being so spread as to extend to near the full internal diameter
of the pipe. The head together with the claws, which are preferably made of steel
are attached by the shank to a rod or bar, either curved or cranked to suit the
particular circumstances. If the rod is hollow the shank may have a thread D at its
lower part and may be screwed into the rod, but if the rod is solid it is found most
convenient to weld the shank on to the rod.
Instead of the claws being of the form shown in Figs. 1 and 2, one, two or
more of them may have their upper parts wedge shaped with the thin or cutting
edge at top as shown in Figs. 3 and 4, or the claws may be made as illustrated in
Figs. 5, 6 and 7.
By the application of this improved tool or instrument much labour and annoyance
is saved, and the operation of what is commonly known as "pipe-jumping" is generally
rendered unnecessary.
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 what I
claim is,-.
Making gas ascension pipe clearing tools of the form herein described and shown
on the drawings.
Dated this 6th day of December 1889.
W. H. BENNELL,
Agent for the Applicant.