An Improved Spring Tube Scraper.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
An Improved Spring Tube Scraper.
CHARLES VINCENT, Engineer, 85 Hillman Street, Belfast. I do hereby
declare the nature of this invention to be as follows:-
My improved spring tube scraper is made of steel or other suitable metal, or
material; in an elongated conical form, with a deep screw thread running from.
end to end, the tops of the threads forming a series of cutting or scraping edges;.
it is made in three parts or sections welded, or otherwise joined together in a handle.
at one end, and in such a manner that the separate parte, or sections will lie apart.
until compressed when passing through a tube.
Dated this 90th day of Max 1806
CHARLES VINCENT.
I, CHARLES VINCENT, of 85 Hillman Street, Belfast, Engineer, 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:-
My invention relates to a scraper for cleaning out the soot and salt incrustations.
in the tubes of marine and other boilers and steam generators.
The scraper which is preferably made of steel and of elongated tapered or
conical form has an external screw thread which forms the scraping edges running
from end to end of it.
The scraper is preferably made in three or more parts or sections welded or
otherwise joined together in a handle or stock at one end in such a manner that.
the sections normally lie apart but are compressed together when they are inserted
into the tube to be cleaned.
And in order that my said invention may be properly understood I have here-
unto appended an explanatory sheet of drawings, whereon,
Fig. 1 is a view showing the section of a tube with a scraper therein.
Fig. 2 is a side view of the scraper.
Fig. 3 is a front view of the scraper.
Fig. 4 shows a slight modification.
As will be seen from the drawings the scraper is made in three parts or
sections a, b, c, which are jointed or welded to the stock or handle d'in such
manner that the sections normally lie open as shown at Figs. 2 and 3. e is a deep
external screw thread made on the sections a, b, c. The stock d may have a
screwed part d' for jointing to a long handle bar g. f is a section of a boiler
tube.
As shown in Fig. 1 when the tapered scraper is inserted into the tube f the
sections are compressed together.

page_text: By working the scraper back and forward in the tube scale or spot is effectually
cleared away.
In the slight modification shown at Fig. 4 the sections a, b, c, are made
with external circular rings or ridges e¹ which take the place of the external
screw thread e.
یا
My improved scraper has the advantage that the back ends of boiler tubes can
be thoroughly cleaned by it.
If desired the external threads may be made spiral for a part of the length of
the scraper and ring shape as at Fig. 4, for the remainder of its length.
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
consider novel and desire to claim is :-
1. A scraper for cleaning tubes made in sections and of elongated tapered or
conical form with an external screw thread or its equivalent, said sections lying
normally apart but being capable of compression when inserted in a tube,
substantially as hereinbefore set forth.
2. A spring tube scraper made substantially as herein before described and shown
on the drawings annexed.
Dated this 20th day of October 1996
CHARLES VINCENT.