Improvements in Lagging for Steam Boilers and the like.
Year: 1892

page_text: Date of Application, 24th Dec., 1892-Accepted, 11th Feb., 1893
COMPLETE SPECIFICATION.
[Communicated from abroad by THE MANNHEIMER GUMMI-GUTTA-PERCHA-
UND ASBEST-FABRIK, at Mannheim, in the German Empire.]
Improvements in Lagging for Steam Boilers and the like.
I, GEORGE JAMES CLARKSON, of 16, Finkle Street, Stockton-on-Tees, in the
County of Durham, Patent Agent, 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 :-
My invention relates to lagging for steam boilers, tubes pipes, furnaces and the
like and has especial reference to such lagging when composed of asbestos fibres,.
and a packing of insulating material such as asbestos fibres Kieselguhr or infusorial
earth, slag wool and the like.
Such lagging as has hitherto been used in industry generally and for steam ships
in particular consists of cushions made of a covering of asbestos fibres and a packing
of insulating material such as asbestos fibres Kieselguhr or infusorial earth slag
wool and the like, which although designed to serve their purpose has the defect
that in consequence of vibrations which are unavoidable with machinery, the
packing settles, bags or bulges and crumbles into dust or otherwise loses its form,
so that the insulation or prevention of the radiation of heat becomes defective in a
very short time.
The object of this invention is to remedy these defects as hereinafter described
and illustrated in the accompanying drawing. Laggings constructed according to.
my invention are lined with bands or strips of Kieselguhr or infusorial earth..
These bands or strips which are surrounded with asbestos fibres or other equivalent
material, such as hemp, cotton, jute and the like are firmly placed against one.
another, for which purpose the quadrangular form is preferable, the said bands or
strips being fixed or tied together by means of asbestos threads and then inserted in
the casing of asbestos fabric.
In consequence of this mode of making up the lagging it is found in practice
that the lining can neither sink, bag, bulge or crumble into dust.
In the drawing
Figures 1 and 2 are corresponding views in perspective which are to be taken.
as illustrating a convenient form of lagging as manufactured according to my
invention.
A, is the lining which is shown in a series of cylinders partially exposed in
Figure 1 for the purpose of illustration but wholly covered as when in use in
Figure 2, and B is the asbestos or the like material with which it is surrounded,.
the whole making up a compact fabric, suitable for lagging.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is :-
The manufacture and use of lagging consisting of a covering or outer casing of
asbestos fabric packed or fitted in with a lining of Kieselguhr or infusorial, earth,
bands or strips, which may be of circular, quadrangular, or other suitable shape,.
and are surrounded by asbestos, threads or other suitable material such as
hemp, cotton, jute and the like, substantially as and for the purpose as hereinbefore.
described.
Dated this 23rd day of December 1809
G. J. CLARKSON,.
Stockton-on-Tees.