Improvements in Screw-like Attachments for Tubes.
Year: 1897

page_text: Date of Application, 23rd Apr., 1897-Accepted, 5th June, 1897
Improvements in Screw-like Attachments for Tubes.
I, VIKTOR LORENC of No. 25 Rottenbillergasse Budapesth in the Kingdom of
Hungary Engineer, do hereby declare the nature of my said invention and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :-
This invention relates to improvements in screw-like attachments for tubes of any
kind, such attachments causing a rotatory movement of the substances, for instance,
gases, liquids, dust- or sand-like substances or a mixture thereof which pass through
the tube and bringing the said substances into immediate contact with the interior
walls of the tube. The object of this rotatory motion is, since the material is thrown
against the walls, to make the surface of the tube (for cooling, heating purposes etc.)
more active or in connection with smoke-tubes to prevent the adhesion of the small
pieces of coal and ashes.
Referring to the accompanying drawings, Figs. 1 & 2 are longitudinal and cross
section respectively of a modification in which a screw 6 & 6¹ of the same or varying
diameter and of any suitable length and pitch and made of durable material is
provided within the tube a filling same up more or less and effecting the rotatory
movement of the material passing through such tube.
It is evident that instead of one screw surface, several can be employed of equal or
varying pitch.
Figs. 3 & 4 show another modification in longitudinal and cross-section, where
instead of central screw surfaces in the tube a radial ribs c d e of any convenient
number having the form of screw blades, are secured to the tube along the interior of
same
It is evident that these ribs may also be made of any suitable pitch and height
so that in the centre of the tube a an open cylindrical chamber is always left for
the passage of the material. The securing of the ribs e de in the tube a may be
effected in any convenient manner, for instance, by connecting same by some interior
rings g or outwardly in like manner. The length and pitch of the attachments
depends upon the material passing through the tube a; thus for instance, sometimes
a short attachment at the feed end of the tube is sufficient whereas for treating other
materials, a longer attachment or several short ones, situated at certain distances from
each other, are required.
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:
1. Improved screw-like attachments for tubes of any suitable kind for the purpose
of causing rotatory movement of the substances or materials, for instance, gases,
liquids, powder- or dust-like substances or a mixture thereof, which pass through the
tube and of bringing same into immediate contact with the interior walls of the tube,
such attachments consisting of screw surfaces (Fig. 1 & 2) centrally inserted into
the tube a, the screw surfaces having a uniform or varying diameter substantially as
described and shown in the drawing.
2. Improved screw-like attachments for tubes of any suitable kind consisting of
radial ribs c d e (Fig. 3 & 4) extending in the form of screw blades along the interior