Improvements in Heat Non-conducting Coverings for Steam or Water Pipes and other purposes,and in Methods of Fixing such Coverings.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Heat Non-conducting Coverings for Steam or
Water Pipes and other purposes,and in Methods of Fixing such
Coverings.
I, JAMES CAMERON HASTIE, of 13, Adelaide Street, Swansea, in the County of
Glamorgan, Manufacturer, do hereby declare the nature of this invention to be
as follows:
My invention relates to coverings of non-conducting material used for prevent-
ing the radiation of heat from steam or hot-water pipes, and for protecting cold
water pipes against frost, and it has for its object a novel method of preparing
and fixing such coverings, so that they are readily applied to the pipes to which
they are to be fitted, and are easily removable in case of alteration or repairs to
the surface covered.
In order to form the covering, I take a sufficient thickness of the mineral fibre
artificially prepared, well-known as silicate cotton or slag wool, and I combine
it in the form of a sheet of the desired dimensions with a layer or sheet of paper
or other suitable material upon its inner side, and a layer or sheet of felt or canvas
or other suitable material upon its outer side. Upon this outer layer of felt or
other material is then placed a sheet of open wire net, and the whole is then
roughly sewn and retained together with sufficient strength, by means of string
or wire passed through the wire net, felt, silicate cotton, and paper, and forms
a compound flexible sheet or slab which can easily be bent round the pipe to be
covered. In order that the covering may be watertight, and to allow it to lie as
evenly and smoothly as possible upon the steam or other pipe when in position,
I make the outer layer of felt of somewhat greater width than the other materials,
so that when the combined sheet is bent round the pipe to be covered, the two
edges of the felt somewhat overlap, and also that each sheet following on the
pipe (in the length of the latter) overlaps the previous one, and the whole of the
materials forming the combined sheet can be drawn tightly together and fixed
in its position.
I prefer to finally fix the combined sheet firmly in position by means of the
wire net, the rough edges of which when cut to the desired size are so arranged
that they can be twisted and interwoven or laced together by means of wire when
the covering has been bent round the pipe, and the two edges of the combined
sheet brought firmly together. Each sheet is then laced together over the lap
of felt, forming a whole and compact covering from end to end of the pipe, or
from flange to flange of the latter.
The whole covering when arranged and fixed to the pipe may have one or
more coats of tar or other suitable material applied to it, and it then forms an
excellent covering for steam or water pipes or other similar purposes, being non-

page_text: conducting of heat, easy of application, readily removable, cheap, and durable
in use.
Dated this 24th day of March 1897.
EDWARDS AND Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.
Improvements in Heat Non-conducting Coverings for Steam or
Water Pipes and other purposes, and in Methods of Fixing such
Coverings.
I, JAMES CAMERON HASTIE, of 13, Adelaide Street, Swansea, in the County of
Glamorgan, Manufacturer, 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, and accompanying drawing, that
is to say:-
My invention relates to coverings of non-conducting material used for prevent-
ing the radiation of heat from steam or hot-water pipes, and for protecting cold
water pipes against frost, and it has for its object a novel method of preparing
and fixing such coverings, so that they are readily applied to the pipes to which
they are to be fitted, and are easily removable in case of alteration or repairs to
the surface covered.
In order to form the covering, I take a sufficient thickness of the
mineral fibre artificially prepared, well-known as silicate cotton or slag
wool, and I combine a sufficient thickness of it in the form of a
sheet of the desired dimensions with a layer or sheet of paper or other suitable
flexible material upon its inner side, and a layer or sheet of felt or canvas
or other suitable material upon its outer side. Upon this outer layer of felt or
other material is then placed a sheet of open wire net, and the whole is then
roughly sewn and retained together with sufficient strength, by means of string
or wire passed through the wire net, felt, silicate cotton and paper, and forms
a compound flexible sheet or slab which can easily be bent round the pipe to be
covered. In order that the covering may be watertight, and to allow it to lie as
evenly and smoothly as possible upon the steam or other pipe when in position,
I make the outer layer of felt of somewhat greater width than the other materials,
so that when the combined sheet is bent round the pipe to be covered, the two
edges of the felt somewhat overlap, and so also that each sheet following on the
pipe (in the length of the latter) overlaps the previous one, and the whole of the
materials forming the combined sheet can be drawn tightly together and fixed
in its position.
I prefer to finally fix the combined sheet firmly in position by means of the
wire net, the rough edges of which when cut to the desired size are so arranged
that they can be twisted and interwoven or laced together by means of wire when
the covering has been bent round the pipe, and the two edges of the combined
sheet brought firmly together. Each sheet is then laced together over the lap
of felt, forming a whole and compact covering from end to end of the pipe, or
from flange to flange of the latter.
The accompanying drawing is in illustration of my invention, Figure 1 showing
a length of pipe provided with the covering between its flanges; and Figure 2
showing the compound sheet in process of being wound round upon the pipe.
a is the pipe which is to be covered. b is a sheet or sheets of paper or other

page_text: material described, c is a thickness of silicate cotton or slag wool, d is an outer
thickness of felt or other material described, and e is the covering of wire net.
The several thicknesses of paper, silicate cotton, and felt, are retained together
by string or wire as above described (but not shown in the drawing), and are
wrapped round the pipe a, as shown in Figure 2, and the outer covering of wire
net e is bent round them, and its edges drawn and attached firmly together.
The ends at f, f, are shown smoothed down and finished neatly, and the whole.
may be coated with tar or other suitable preservative material.
The whole covering when arranged and fixed to the pipe may have one or
more coats of tar or other suitable material applied to it, and it then forms an
excellent covering for steam or water pipes or other similar purposes, being non-
conducting of heat, easy of application, readily removable, cheap, and durable
in use.
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:
1. The covering for pipes, consisting of an inner flexible sheet such as b, a
thickness of silicate cotton or slag wool such as c, and an outer flexible sheet
such as d, an outer covering of wire net such as e being fitted and attached round
the outer flexible sheet d, substantially as described, and shewn in the drawing.
2. In the compound covering described and claimed in Claim 1, the method
of retaining together the inner sheet b, the silicate cotton or slag wool c, and the
outer sheet d, by means of string or wire, substantially as described.
DJ thi 0441
Tam 100%
EDWARDS AND CO.,
65 and 66, Chancery Lane, London, Agents for the Applicant.