IMPROVEMENTS IN THE METHOD OF AND MEANS FOR REPAIRING STEAM BOILERS
Year: 1880

page_text: LETTERS PATENT to Arthur Charles Henderson, of 6, Southampton Buildings,
Holborn, in the County of Middlesex, for an Invention of "IMPROVEMENTS
IN THE METHOD OF AND MEANS FOR REPAIRING STEAM BOILERS." A com-
munication from abroad by Louis Knölke, of Hanover, in the Empire of
Germany.
PROVISIONAL SPECIFICATION left by the said Arthur Charles Henderson at
the Office of the Commissioners of Patents on the 20th July 1880.
ARTHUR CHARLES HENDERSON, of 6, Southampton Buildings, Holborn, in the
County of Middlesex. "IMPROVEMENTS IN THE METHOD OF AND MEANS FOR
REPAIRING STEAM BOILERS." A cominunication from abroad by Louis Knölke,
of Hanover, in the Empire of Germany.
The object of this Invention is to close or repair the fissures in steam boilers, and
especially tubular boilers, so that the crack is perfectly closed and the solidity of
the boiler plate at the defective part is reestablished.
This is effected by the employment of plain metal quoins or wedges whose
extremities terminate in conical, circular, or polygonal spindles, preference may,
however, be given to those of a circular form,
In making use of these wedges, it is first necessary to drill a hole on each side
of the plate where the fissure exists, and at a distance equal to that of the axes of
the two spindles or other shaped ends. The boiler iron is then hollowed between
these two holes, in width corresponding with the thickness of the wedge, and
this latter sunk therein, effectually locks the boiler plate at the defective portion
and quite prevents its reopening.
One or more wedges would be used according to the length of the fissure.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Arthur Charles Henderson in the Great Seal Patent Office on the
19th January 1881.
ARTHUR CHARLES HENDERSON, of 6, Southampton Buildings, Holborn, in the
County of Middlesox. "IMPROVEMENTS IN THE METHOD OF AND MEANS FOR
REPAIRING STEAM BOILERS." A communication from abroad by Louis Knölke,
of Hanover, in the Empire of Germany.
The object of this Invention is to close or repair fissures in steam boilers, and
especially tubular-boilers, so that the crack is perfectly closed and the solidity of
the boiler plate at the defective part is re-established.
This is effected by the employment of plain metal wedges or quoins whose
extremities terminato in conical or polygonal spindles.
In the accompanying Drawings is represent a plain quoin whose ends are
wedge shaped, see Figs. 1, 2, and 3. Or it may be plain, flanked by two conical
spindles.
In making use of theso wedges for closing a fissure, it is first necessary to drill a
hole on each side of the plate where the fissure exists, and at a distance equal to
that of the axes of the two spindles or other shaped ends; the boiler iron is then
.hollowed between these two holes, in width corresponding with the thickness of
the wedge, and the latter is then solidly inserted. The displacement of the particles
resulting therefrom-only-produces small swellings at the sound sides of the plate,
where it is held by the tubes or by other means, whilst at the sides-of-the-fissure.it..
effects by aid of the spindles a movement of particles which effectually closes the
crank, at the same time the wedge forcibly sank in the position it is intended it
should occupy a perfect fishing of the fissure is effect in part due to the form of
the wedge. One or more wedges would be employed according to the extent of
the fissure to be closed, vide Fig. G.
The wedge in question may also be used for mending splits in the rims or flangos
of wheels; for this purpose it is necessary to make the spindles less conical at their
external surfaces than at their internal surfaces; the external surfaces may also be
made cylindrical.
It may be readily conceived that like results may he effected by the use of
polygonal shaped spindles, as represented by the Figures 4 and 5, but preference
is given to the employment of spindles whose surfaces are circular as being the
most practical method.
Finally, the inventor claims as his Invention the use and application of plain
quoins or wedges flanked with spindles, which may be either conical, circular, or
polygonal, for the purpose of closing fissures in steam boilers, and for the rims or
Hanges of wheels, in the manner and by the means as herein specified.
In witness whereof, I, the said Arthur Charles Henderson, have hereunto set
my hand and seal, this Seventeenth day of January, in the year of our Lord
One thousand eight hundred and eighty one.