IMPROVEMENTS IN APPARATUS FOR SCRAPING OR BRUSHING BOILER TUBES
Year: 1884

page_text: I, JAMES MURRAY, of 96 Buchanan Street Glasgow, in the county of Lanark,
Engineer, do hereby declare the nature of my said Invention for "IMPROVEMENTS
IN APPARATUS FOR SCRAPING OR BRUSHING BOILER TUBES," to be as follows:--
This Invention consists of improvements in apparatus for scraping or brushing
the internal surfaces of boiler tubes.
The improved tube scraper consists of a central spindle which is screwed at each
end and fitted with screw nuts between which a long sleeve of wood or other
material is fitted over the spindle. Around the wooden sleeve is fixed a strip of
carding cloth or similar material provided with wire bristles which serve as the
scraping or brushing surface, and such fabric is conveniently secured in place by
passing it in the form of a broad ring over the sleeve and then nailing it thereto.
The screwed portions of the spindle project beyond the nuts at each end, and these
screwed ends serve for attachment in the usual manner to the ordinary handle or
rod, by means of which the scraper is pushed through the tubes whose internal
surfaces are to be scraped or brushed. When by repeated use, the wires of the
carding cloth become set in one direction, one of the nuts may be unscrewed and
the sleeve with the carding cloth be turned end for end, or the scraper may be
detached from the rod or handle and reattached at the opposite end of the central
spindle. The nuts at the ends of the spindle may be of any shapo, but are by pre-
ference made of conical or conoidal form and of less diameter than the brushing
surface, and the inner sides of the nuts may be formed to grip the woodon sleeve
between them:

page_text: I JAMES MURRAY of 96 Buchanan Street Glasgow in the county of Lanark,
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
APPARATUS FOR SCRAPING OR BRUSHING BOILER TUBES," and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement:-
This invention consists of improvements in apparatus for scraping or brushing
the internal surfaces of boiler tubes.
A modification of the improved tube scraping apparatus is illustrated in the
accompanying drawings in which figures 1 and 2 are end and side elevations and
figures 3 and 4 transverse and longitudinal sections.
The improved tube scraper consists of a central spindle A which is screwed at
each end and fitted with screw nuts or caps B between which a long sleeve D of
wood or other material is fitted over the spindle. Around the wooden sleeve D is
fitted a strip E of carding cloth or similar material provided with wire bristles e
which serve as the scraping or brushing surface and such fabric is conveniently
secured in place by passing it in the form of a broad ring over the sleeve and then
nailing it thereto. The screwed portions of the spindle project beyond the nuts or
caps at each end and these screwed ends serve for attachment in the usual manner
to the ordinary handle or rod by means of which the scraper is pushed through the
tubes whose internal surfaces are to be scraped or brushed. When by repeated use
the wires of the carding cloth become set in one direction one of the nuts B may be
unscrewed and the sleeve D with the carding cloth be turned end for end or the
scraper may be detached from the rod or handle and re-attached at the opposite
end of the central spindle.
i
The nuts or caps B at the ends of the spindle may be of any shape but are by
preference made of conical or conoidal form and of less diameter than the brushing
surface e and the inner sides of the nuts or caps may be formed to grip the wooden
sleeve D between them.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1 A tube scraping device consisting of a reversable sleeve covered with carding
cloth or wire bristles substantially as set forth.
2 The combination with the spindle A. of the nuts or caps B and wire covered
sleeve D as and for the purpose set forth.