Year: 1886

page_text: Date of Application, 27th Oct., 1886.
Complete Left, 27th July, '1887.
Complete Accepted, 6th Sept., 1887.
1, Sir EDWARD GREEN, Baronet, M.P. for Wakefield, County of York, of the firm
Edward Green and Son of Wakefield, Yorks, Fuel Economiser Manufacturers, do
hereby declare the nature of this invention to be as follows :-
The object of this invention, is to produce a more effectual scraping of the tubes
of Fuel Economisers for the removal of soot and deposit therefrom.
According to the ordinary method of constructing scrapers for the tubes of Fuel
Economisers, the scraping surfaces have been plain knife edge which always worked
straight up and down and over the same surface.
Now according to my present invention, I fit or cast blades, each with a straight or
curved face or cutting edge, on the inner circumference of the tool to form scrapers,
said blades being arranged diagonally and tangentially but looking in opposite directions
to each other at the top and bottom of said scraper tool, or some of the blades of each
end may be set diagonally in opposite directions among themselves so that the blades
act with a ploughing action against the surface of the tube and effectually remove all
soot and deposit therefrom.
One end of each scraper may have the blades arranged in either of the before
mentioned manners and the other end have a plain scraping surface.
H. GARDNER,
166, Fleet Street, London,
Agent for the said Sir Edward Green.

page_text: I, Sir EDWARD GREEN, Baronet, M.P. for Wakefield, County of York, of the firm
Edward Green and Son of Wakefield, Yorks, Fuel Economiser Manufacturers 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:-
.
The object of this invention is to produce a more effectual scraping of the tubes of
Fuel Economisers for the removal of soot and deposit therefrom.
According to the ordinary method of constructing scrapers for the tubes of Fuel
Economisers, the scraping surfaces have been plain knife edge which always worked
straight up and down and over the same surface.
Now according to my present invention, which is represented in the annexed
Drawings, I fit or cast blades, each with a straight or curved face or cutting edge a a
on the inner circumference of the tool b to form scrapers, said blades a a being arranged
diagonally and tangentially but looking in opposite directions to each other at the
top and bottom of said scraper tool c as at Figure 1 or some of the blades a a of each
end may be set diagonally in opposite directions among themselves as at Figures 3
and 4 so that the blades a a act with a ploughing action against the surface of the
tube and effectually remove all soot and deposit therefrom.
One end of each scraper may have the blades arranged in either of the before
mentioned manners and the other end have a plain scraping surface as at Figure 5.
Figures 6 and 7 show one end of a scraper tool on a larger scale and is similar to
that referred to in Figure 1.
The tools may be single ended as at Figure 4 or double ended as Figures 1 and 5.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed I declare that what I claim is :-
The improvement in scraper tools for fuel economisers herein before described and
shown having the cutting or scraping edges of said tools arranged tangentially for
the purpose set forth.
The 27th day of Inv
1887
The 27th day of
Inly 1887
H. GARDNER,
166, Fleet Street, London,
Agent for the said Sir Edward Green, Bart., M.P.