Improvements in Earthenware Still-worm Pipes.
Year: 1896

page_text: Date of Application, 21st Dec., 1896-Accepted, 27th Mar., 1897
COMPLETE SPECIFICATION.
Improvements in Earthenware Still-worm Pipes.
A communication to me from LUDWIG ROHRMANN, of Krauschwitz, near Muskau, in
the Empire of Germany, Manufacturer.
I, EDMUND EDWARDS, of the Firm of Edwards and Co., Patent Agents and
Engineers, of 65 and 66, Chancery Lane, in the County of Middlesex, 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, and
accompanying drawings, that is to say :-
In the system of earthenware worm-pipes for stills heretofore used, the tubular
coils constituting the worm are carried by more or less complicated framing or
supports, and the present invention has for its object methods of construction by
which such special supports are unnecessary, the separate helically-formed tubes
resting upon and being supported by one another.
In the accompanying drawings, which are in illustration of the invention,
Figure 1 shows the improved method of construction in plan, Figures 2 and 3
being vertical sections, and Figures 4 to 10 illustrating different forms of section
which may be used for the pipes.
The invention is not, however, dependent upou any particular shape or section of
the separate pipes, which are in no way confined or limited to the different shapes
which are shown by way of example, but may be made with any desired section, as
they are provided with one or more projecting parts a, by which the necessary
stability and the strength to carry their weight is afforded. In the forms of section
given in Figures 9 and 10, these projecting parts a are shown brought nearer together
so as to increase the cooling outer surface of the pipe; and in this case to increase
the vertical resistance of the pipes to the weight of the upper coils lying on them,
the pipes are strengthened by one or more ribs or stays f.
The openings through these projecting parts shewn at b, which may have any
desired shape, have for their object to allow and facilitate the circulation of the
cooling water round the pipes, and through the spaces c between them. A bottom
stand or support e, also provided with openings d, serves to carry the entire
apparatus, the inclination of the support e being made to correspond with that of
the worm pipes.
The improved apparatus possesses many advantages over apparatus for a similar
purpose ordinarily heretofore used. For instance,
(1.) In their manufacture all the expensive supports of wood, plaster, iron, and
the like, ordinarily used to hold the pipes in place after they are pressed, are
unnecessary, as well as the earthenware supports and frames, upon which the pipes
have to be arranged whilst being burned in the kiln.
(2.) The entire manufacture is essentially simple; the usual difficult and tedious
hand labour is not required, and the wages paid for the same are saved, and more
than five times the output of pipes can be obtained.
(3.) The weight of the improved apparatus is reduced from the absence of all
supports and framing, so that purchasers especially living abroad-are saved
considerable freight and duties.
(4.) As the separate coils of pipe are arranged directly upon each other, the
considerable, space ordinarily occupied by supporting arrangements between them is

page_text: saved, so that the height of the entire apparatus, as compared with the ordinary
arrangement having the same number of coils, is considerably reduced.
(5.) There is, accordingly, an important reduction in the material required for the
tanks and vats, and also a great saving of space.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
Earthenware still-worm pipes, in which-in order to render superfluous the
arrangement and use of special supports and frames, the separate pipes are
provided with projecting parts a, in which openings or passages b are formed for the
circulation of the cooling water, the pipes being laid helically directly one above
the other, and the interior of the pipes being strengthened if necessary by the
strengthening ribs or stays f, substantially as described and illustrated.
Dated this 21st day of December 1896.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.