IMPROVED MEANS OR APPA- RATUS FOR THE PREVENTION AND REMOVAL OF INCRUSTATION UPON THE TUBES OF TUBULAR STEAM BOILERS
Year: 1879

page_text: LETTERS PATENT to William Paulson, of Mount Sorrel, near Loughborough,
in the County of Leicester, for the Invention of "IMPROVED MEANS OR APPA-
RATUS FOR THE PREVENTION AND REMOVAL OF INCRUSTATION UPON THE TUBES
OF TUBULAR STEAM BOILERS."
Sealed the 30th September 1879, and dated the 3rd April 1879.
PROVISIONAL SPECIFICATION left by the said William Paulson at the
Office of the Commissioners of Patents on the 3rd April 1879.
WILLIAM PAULSON, of Mount Sorrel, near Loughborough, in the County of
Leicester. "IMPROVED MEANS OR APPARATUS FOR THE PREVENTION AND REMOVAL
OF INCRUSTATION UPON THE TUBES OF TUBULAR STEAM BOILERS."
The object of the Invention is to prevent the deposit of incrustation upon the
tubes of tubular steam boilers, and to remove such deposit as may adhere thereto
whilst it is in a soft or comparatively easily removable condition.
In order to effect this object I place around the tubes rings or annular pieces of
metal or other suitable material, having the edge of one or both of their side
surfaces bevelled or inclined inwards towards the central part of the ring, or
towards the tube, so that space may be afforded for the generation of steam therein,
which in escaping forces the rings or annular pieces of metal or other material in
the contrary direction, and by a succession of such discharges the annular pieces of
tube or rings being caused to traverse to and fro upon the boiler tubes, and by
such movements and vibration preventing the adhesion and effecting the removal
of deposit on the boiler tubes.
Annular pieces of metal or rings formed of an entire circle may be employed, or
they may be formed of portions of three or other number of circles equal to the
diameter of the tube on which they rest, with grooves or recesses provided at the
points of junction of the part circles, or at other parts of the inner surface of the
rings for the generation of the steam to propel them along the boiler tubes.
The form of these annular or surrounding pieces or rings may be considerably
varied, as may also the number and disposition of the grooves or recesses therein
when such are used according to circumstances.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Paulson in the Great Seal Patent Office on the 3rd October
1879.
WILLIAM PAULSON, of Mount Sorrel, near Loughborough, in the County of
Leicester. "IMPROVED MEANS OR APPARATUS FOR THE PREVENTION AND REMOVAL 5
OF INCRUSTATION UPON THE TUBES OF TUBULAR STEAM BOILERS."
The object of the Invention is to prevent the deposit of incrustation upon the
tubes of tubular steam boilers, and to remove such deposit as may adhere thereto
whilst it is in a soft or comparatively easily removable condition.
But that the Invention may be the better understood I will by the aid of the 1
accompanying Drawings proceed to describe means pursued by me in carrying the
same into effect.
Figures 1 and 2 represent by transverse and longitudinal sectional views one
form of my Invention applied, a representing the section of an ordinary boiler
tube.
In order to effect the object of the Invention I place around the tubes a
rings or annular pieces or portions of tubing of metal or other suitable material,
such as represented at b, with the edge of one or both of their side surfaces bevilled
or inclined inwards towards the central part of the ring or towards the tube, so
that space c may be afforded for the generation of steam therein, which in escaping
forces the rings or portions of tubing b along the tubes a, sometimes in one direction
and sometimes in the other, when by a succession of such discharges these rings or
pieces are caused to traverse alternately to and fro upon the boiler tubes a, and
by such movements and the consequent vibration to prevent adhesion of deposit,
and thereby effect the removal of such deposit from the boiler tubes. Rings with
the bevil on one side or edge only and with a flat side or flange at the opposite end
or edge, as indicated at e, Figures 3, 4, and 5, are particularly applicable to clearing
the ends of the tubes next their junction with the plates of the boiler in which
such tubes are fitted, in order that the steam by acting between the square end or
flange e and the plate f, together with that acting on the bevilled or inclined
surface c may cause these rings to be propelled for a short distance alternately in
opposite directions more effectually to clear these end parts of the tubes.
These annular pieces of metal or rings may be formed of an entire circle, as
indicated by Figures 1 and 2, or they may be formed of portions of three or other
number of circles, each portion being the segment of a circle equal to the diameter
of the tube, on which they rest, as indicated by Figures 6 and 7, and provided
with grooves or recesses formed at the points of junction of the part circles, as indi-
cated at d, Figures 6 and 7, or at other parts of the inner surface of the rings for
the generation of the steam to propel them along the boiler tubes.
The form of these annular or surrounding pieces or rings may be considerably
varied, as may also the number and disposition of the grooves or recesses therein
when each are used according to circumstances.
Having thus described my Invention and means which I adopt in carrying the
same into effect I would have it understood that I do not confine myself to the
precise arrangements of rings or tubes shown and described, as the same may be
varied without departing from the peculiar character of my Invention,
But what I do claim is,-
The application of rings or portions of tubing to tubes of tubular steam boilers

page_text: adapted to prevent and remove incrustation upon such tubes, substantially as
described.
In witness whereof, I, the said William Paulson, have hereunto set my hand
and seal, this Second day of October, in the year of our Lord One thousand
eight hundred and seventy nine.
Witness,
ALFRED G. BROOKES,
37, Southampton Buildings,
Chancery Lane,
London.
W. PAULSON. (L.S.)