Improvements in Apparatus for Removing Scale from the Smoke- tubes of Boilers.
Year: 1897

page_text: Improvements in Apparatus for Removing Scale from the Smoke-
tubes of Boilers.
I, ANDREAS GEORG HEINRICH WILHELM KLAGGES, of 83, Billhorner Muhlenweg
Hamburg, Germany, Machinist, do hereby declare the nature of this invention
to be as follows;-
This invention relates to an apparatus for removing scale from the smoke-tubes
of boilers in which a chisel or cutter is held in a central position by means of a
weight connected to it, so that the apparatus can be attached to a chain, strap,
rope, or like flexible connexion and also be made so narrow as to allow of its use
even with tubes placed very near together.
Fig. 1 of the accompanying drawings a front elevation of the apparatus the
chisel being omitted on the right hand side; and Fig. 2 is a side elevation thereof;
whilst Fig. 3 illustrates the mode of operation of the apparatus.
The apparatus comprises two double-edged chisels a each of which is provided
in its rear end with two holes b and c arranged so that the line connecting their
centres is situated at right angles to the axis of symmetry of the chisel. The chisels
are connected by means of rods d (fastened to the holes 6) with a crosshead f to
which is attached the flexible connexion g. To the holes c are fixed rods h which
engage with brackets i secured to a weight k that holds the chisels in the middle
or horizontal position when the apparatus is hanging freely. At the upper part of
the weight there is provided a grooved slot for guiding a pin secured to the
crosshead.
In operation, the apparatus is let down by means of the flexible connexion,
between two rows of tubes, the chisels scraping against the upper right hand
quarter of the top left hand tube. But the chisels must at the same time move
out of the middle position (because otherwise the apparatus would not be able to
pass through the narrowest space between the tubes), the axes of the pins, which
are usually situated in a vertical plane, moving into a horizontal plane. As soon as
the heads of the chisels have passed through the narrowest part, and there is con-
sequently no longer any obstacle, the weight comes into operation and both pins
resume their original position (one vertically over the other) with the result that
the cutter or chisels strike upon the next lower left hand tube. The apparatus
is then drawn up so that the chisels clean the lower right hand side of the upper
tube. In this manner the apparatus is advanced lengthwise along the tube, and
the half of its periphery is cleaned. Then the apparatus is caused to act upon the
tube situated underneath, and so, on. When an entire row has been cleaned in

page_text: this manner, the apparatus is drawn up and is turned through 180°, and the
adjacent half of the periphery of the next row is treated, and so on.
Dated this 9th day of September 1897.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.
Improvements in Apparatus for Removing Scale from the Smoke-
tubes of Boilers.
I, ANDREAS GEORG HEINRICH WILHELM KLAGGES, of 83, Billhorner Muhlenweg, 1
Hamburg, Germany, Machinist, 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:→
This invention relates to an apparatus for removing scale from the smoke tubes
of boilers, in which a chisel or cutter is held in a central position by means of a
weight connected to it, so that the apparatus can be attached to a chain, strap,
rope, or like flexible connection, and can also be made so narrow as to allow of its use
even with tubes placed very near together.
Fig. 1 of the drawings filed with my Provisional Specification is a front elevation
of the apparatus, the chisel being omitted on the right-hand side; and Fig. 22
is a side elevation thereof; whilst Fig. 3 illustrates the mode of operation of the
apparatus.
The apparatus comprises two double-edged chisels a each of which is provided
in its rear end with two holes b and c arranged so that the line connecting their
centres is situated at right angles to the axis of symmetry of the chisel. The chisels
are connected by means of rods d (fastened to the holes b) with a crosshead f to
which is attached the flexible connection g. To the holes c are fixed rods h which
engage with brackets i secured to a weight k that holds the chisels in the middle
or horizontal position when the apparatus is hanging freely. At the upper part of
the weight there is provided a grooved slot for guiding a pin 7 secured to the
crosshead.
In operation, the apparatus is let down by means of the flexible connection
between two rows of tubes, the chisels scraping the upper right hand quarter
of the top left-hand tubes. But the chisels must at the same time move
out of the middle position (because otherwise the apparatus would not be able to
pass through the narrowest space between the tubes) the axis of the pins, which
are usually situated in a vertical plane, moving into a horizontal plane. As soon as
the heads of the chisels have passed through the narrowest part, and there is con-
sequently no longer any obstacle, the weight comes into operation and both pins
re-assume their original position (one vertically over the other) with the result that
the cutter or chisels strike upon the next lower left-hand tube.
The apparatus
is then drawn up, so that the chisels clean the lower right-hand side of the upper
tube. In this manner the apparatus is advanced lengthwise along the tube, and
the half of its periphery is cleaned. Then the apparatus is caused to act upon the
tube situated underneath, and so on. When an entire row has been cleaned in
this manner, the apparatus is drawn up, and is turned through 180°, and the
adjacent half of the periphery of the next row is treated, and so on.
Having now particularly described and ascertained the nature, of the said in-
3
3.

page_text: vention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. Apparatus for removing scale from the smoke-tubes of boilers, consisting of
a double-edged chisel a attached pivotally between a flexible band (g) and a
weight (k) in such a manner that the chisel is forced out of the middle position in
passing between two rows of tubes, and after passing the narrowest space between
such two rows of tubes is caused by the weight to move again into its middle
position, thus cleaning the tube partly by scraping and partly by knocking sub-
stantially as described.
2. Apparatus for removing scale from the smoke-tubes of boilers constructed and
operating substantially as described with reference to the drawings.
2000
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.