Year: 1887

page_text: Date of Application, 19th Sept., 1887
Complete Left, 19th June, 1888
Complete Accepted, 27th July, 1888
1. ROBERT HOWARTH of 53 Goldthorn Terrace, Penn Road, Wolverhampton, in
the County of Stafford, Engineer, do hereby declare the nature of this invention to be
as follows:-
This invention relates to an apparatus for cleaning internally the tubes of
multitubular steam boilers, and has for its object to supply a simple apparatus
constructed of parts, any of which can be easily renewed in case of damage.
To carry out the purpose of my invention I provide a disc of steel or other suitable
metal, a little smaller in diameter than the orifice of the tube for which it is intended,
having a hole in the centre.
I next provide two castings preferably made of brass, or other malleable metal,
which in appearance somewhat resemble pipes about four inches long, having guides
or wings radiating from the outsides of the pipes and extending axially, the whole
length of them, a circle circumscribing these wings, at one end, would be of the
same diameter as the steel disc already provided, the diameter of such circle decreasing
as the other end of the pipe is approached, until finally the wings are reduced to the
same diameter as the pipe itself.
I next provide a suitable stalk, having a screw thread and nut at one end,
and a rigid collar in a proper position to support the loose parts to be placed
thereon.
On this stalk I thread one of the castings until the small end of it rests upon the
rigid collar, then I pass the stalk through the hole in the steel disc, and finally thread
the second casting on to the stalk so that the small end of it shall be nearest to the
screwed end of the stalk, in this position I bind the whole firmly together by means of
the screw thread and nut.
In operation the whole apparatus is secured to a suitable handle and is forcibly
pushed into any tube intended to be cleaned.

page_text: In the event of any tube being partially closed by incrustation the result of
leakage, the wings on the castings being narrow are easily forced through it leaving
the cutting edges of the steel disc free to effect its entire removal without unnecessary
violence.
The wedge like shape of the wings on the castings are intended to facilitate the
entry and withdrawal of the tool.
When desired any, or every part, being loose, can be easily removed from the stalk,
simply by unscrewing the nut.
Dated this Seventeenth day of September One thousand eight hundred and
eighty seven

page_text: I, ROBERT HOWARTH, of 53 Goldthorn Terrace, Penn Road, Wolverhampton, in the
County of Stafford, 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 :-
This invention relates to an apparatus for cleaning, internally, the tubes of
multitubular steam boilers, and has for its object, to supply a simple apparatus,
constructed of parts, any of which can be easily renewed in case of damage.
To carry out the purpose of my invention, I provide the several parts illustrated by
the drawings, in which Fig. 1 is an elevation, Fig. 2 an end view, and Fig. 3 a
section of a guide, made proferably of malleable cast iron. Figs. 4 and 5 are views
of a disc, made preferably of steel, having a hole in the centre. Fig. 6 is a stem,
provided with a screw thread and nut at one end, the other end being tapped for
convenient attachment to a suitable handle. And Fig. 7 represents the apparatus fitted
together ready for use.
To fit the parts together, I place the steel disc Fig. 4 between two guides
Fig. 1, and thread the whole upon a stem Fig. 6, binding the whole firmly
together by means of the screw thread and nut, as shown by Fig. 7. The several
parts accommodating themselves to each other, and the square shoulder A, Fig. 6
preventing rotation.
In operation the apparatus is secured to a suitable handle at B and is then passed
through any tube for which it is suited, this action causes the flue dust which gathers
in front of it, to scour and clean those parts of the tube not actually in contact with
the apparatus. In the event of the tube being partially closed at the end by
incrustation, the result of leakage, the wings of the advancing guide being thin are
easily forced through the obstruction, dividing it into segments, leaving the cutting
edges of the steel disc, to effect its entire removal without unnecessary violence.
The parts are all interchangeable and can be reversed or renewed, at pleasure by
removing the nut.
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
First. A combination of seperate parts held together by a screw thread
and nut
ir
21

page_text: Second. An apparatus constructed of guides made of cast metal, provided with
projections or wings, to be used in combination with other parts as herein fully described,
substantially as and for the purposes set forth.
Third. An apparatus constructed with a steel disc, to be used in combination
with other parts, as herein fully described, substantially as and for the purposes
set forth.
Fourth. An apparatus containing a combination of any or of all the parts as herein
fully described, substantially as and for the purposes set forth.
ROBERT HOWARTH.