Improvements in Coverings for Steam Boners, Rools, and other Purposes, and in the Methods of Fixing such Coverings.
Year: 1885

page_text: Improvements in Coverings for Steam Boners, Rools, and other
Purposes, and in the Methods of Fixing such Coverings.
I, ROBERT STEWART, of Perren Street, Ryland Road, in the County of Middlesex,
Manufacturer do hereby declare the nature of my. invention for "IMPROVEMENTS
IN COVERINGS FOR STEAM BOILERS, ROOFS, AND OTHER PURPOSES, AND IN THE
METHODS OF FIXING SUCH COVERINGS to be as follows:-
"
My invention relates to coverings of non-conducting material used for the purpose
of preventing the radiation of heat from steam boilers or for the roofs of buildings
in order to keep them cool or of equal temperature, and it has for its object a novel
method of preparing such covering so that it complete in itself and is readily fitted,
applied, and fixed to the boiler or other situation where it is to be used, and can be
removed and replaced when desired.
In order to form the improved covering for the purposes described, I take a
sufficient thickness of the mineral fibre artificially prepared known as Silicate
Cotton, or Slag Wool, and I combine it in the manner hereinafter described with an
inner covering preferably of open wire net, and an outer covering of sheet metal of
any suitable thickness, plain or corrugated, or other suitable material of sufficient
durability and flexibility, the compound material so made forming a covering
complete in itself, and capable of being readily fitted, applied, and fixed to boilers
of any shape, and to the roofs of buildings or other purposes as already described.
Supposing that the compound covering is to be applied to a boiler, in order to
prepare it in a convenient and portable form, I prefer to take an outer sheet of
plain or corrugated sheet metal shaped and fitted to the surface of the boiler and
through the sheet so fitted I drill or punch a sufficient number of holes at convenient
distances apart into which I fit bolts or pins projecting inwards, of a length varying
with the thickness which it is required that the compound covering should have.
On the inner side of the metal sheet I then gradually lay on a sufficient thickness
of the silicate cotton or slag wool, in thin sheets or flakes, until the requisite
uniform thickness of the material has been obtained, and upon it I fit and press
down a sheet of open wire netting or other sufficiently flexible and durable material
through which the ends of the bolts or pius protrude, and I then fit washers and
nuts or pins to the ends of the bolts or pins, so that the silicate cotton or slag wool,
and its outer and inner coverings are all held firmly and durably together.

page_text: The compound sheet or covering prepared as described can be fixed to the boiler
to which it is applied, by means of studs screwed into the boiler and passing
through corresponding holes in the covering, nuts being screwed upon the outer
ends of the studs; or wooden ribs may be fixed to the boiler at intervals, and the
covering nailed or screwed to these ribs; or it may be held by means of external
bands or hoops passing round the covering and holding it down against the boiler;
or by other equivalent well known means according to the position of the covering
and the shape of the boiler to which it is applied.
If the outer sheet is sufficiently thin, the compound covering may be made in
flat sheets and subsequently bent to its place.
Covering made, applied, and fixed in the manner described, is fireproof, an
excellent non-conductor of heat, easy of application, readily removeable when
required for the purpose of repairing or cleaning, not affected by weather or by
the attacks of vermin in hot climates, and it forms an excellent covering or roofing
for houses or other buildings or other purposes where these qualities are of
importance.
.
Improvements in [Coverings for Steam Boilers, Roofs, and other
Purposes, and in the Methods of Fixing such Coverings.
I, ROBERT, STEWART of Perren Street, Ryland Road, in the County of Middlesex,
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 material. non-conducting of heat, used for
the purpose of preventing the radiation of heat from steam boilers, or for the roofs
or walls of buildings or in other situations where it is desired to, keep a cool or
equable temperature, and it has for its object a novel method of preparing such
covering so that it is complete in itself and is readily fitted, applied, and fixed to
the boiler or other situation where it is to be used, and can be easily and quickly
removed and replaced when desired.
In order to form the improved covering, for the purposes described, I.. take a
sufficient thickness of mineral fibre artificially prepared in the way well known
and practised, known as Silicate Cotton, or Slag Wool, and I combine it in the
manner hereinafter described with an inner covering preferably of open wire net,

page_text: and an outer covering of sheet metal of any suitable thickness, plain or corrugated,
or other suitable material of sufficient durability and flexibility, the compound
material so made forming a covering complete in itself, and capable of being readily
fitted, applied, and fixed to boilers of any shape, or to the roofs or walls of
buildings or other purposes as already explained.
Supposing that the compound covering is to be applied to a boiler in order to
prevent the loss of heat by radiation, in order to prepare it in a convenient and
portable form, I prefer to take an outer sheet of plain or corrugated sheet metal
shaped and fitted to the surface of the boiler and through the sheet so formed
I drill or punch a sufficient number of holes at convenient distances apart into
which I fit bolts or pins projecting inwards of a length varying with the thickness
which it is required that the compound covering should have.
On the inner side of the metal sheet I then lay on a sufficient thickness of the
silicate cotton or slag wool, in thin sheets or flakes, until the requisite uniform
thickness of the material has been obtained, and upon it I fit and press down a
sheet of open wire netting or other sufficiently flexible and durable, material
through which the ends of the bolts or pins protrude, and I then.fit washers and
nuts or pins to the ends of the bolts or pins, so that the silicate cotton or slag wool,
and its outer and inner coverings are all held firmly and durably together.
The compound sheet or covering prepared as described can be fixed to the boiler
to which it is applied, by means of studs screwed into the boiler and passing
through corresponding holes in the covering, nuts being screwed upon the outer
ends of the studs; or wooden ribs may be fixed to, the boiler at intervals, and the
covering nailed or screwed to those ribs; or it may be held by means of external
bands or hoops passing round the covering and holding it down against the boiler;
or by other equivalent well known means according to the position of the covering
and the shape of the boiler to which it is applied.
If the outer sheet is sufficiently thin the compound covering may be made in flat
sheets and subsequently bent to its place.
The accompanying drawing is in illustration of my invention similar letters of
reference indicating the same parts in the several figures. Figure 1 shewing a
section of the compound covering curved so as to fit upon a boiler, figure 2 being
a view of the outside and figure 3 of the inside of the covering. a is the outside
sheet of metal, b the thickness of silicate cotton or slag wool, and c the inner sheet
of wire netting. d, d, d, are bolts or studs fitted or fixed into the outside sheet a,
and projecting through the inner sheet of wire netting c, the whole being held
together by washers e and nuts or pins f.
Figure 4 represents in section a similar covering modified so as to be applicable
to form walls of huts or buildings which it is desired to make more or less non-
conducting or impervious to heat.
This
In this case the outer metal sheet a is shewn corrugated, and the inner wire net c
is shewn held in its place by double ended wire fastenings g passed through from
the outside, and fastened inside the wire net by bending their ends over.
form of covering may form a complete wall in itself, being made in pieces of
convenient size held in position by being bolted or fixed to wood or metal frames.
Plaster or cement may be applied to cover the wire net, as shewn at h, so as to
give a finish to the inside of the wall.
Where the covering is to be applied to existing walls or surfaces, wire net may
be used upon both sides of the silicate cotton or slag wool, as shewn in figure 5, and
where it is to be fitted in or round corners, or is to be used as a covering for beams
or projections, the outer wire net may be cut (as shewn at i in figure 6) so that the
covering may be readily bent to the desired form, and the outer wire net may be
finished with a coat of cement or plaster as already described.
Where the compound covering.is to be used for walls or ceilings in the way last
described, wooden or other laths or strips may be embedded in the silicate cotton
or slag wool, as shewn at k, k in figures 7 and 8, and sheets of paper or other light
material may be laid over the silicate cotton or slag wool before the laths or strips

page_text: are embedded in the latter, Plaster or cement may be applied outside the wire
net, as shewn at h.
.
Compound covering made and used in the way described and shewn is fireproof,
very durable, a good insulator of heat, easy of application, and readily removed and
replaced, whilst it is weatherproof; vermin-proof, and especially suitable as a roofing
or covering in hot climates.
17
I do not confine myself to the precise form and method of construction and
attachment of the improved covering, which may be varied more or less according
to the purpose and circumstances under which it is to be used, but 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 compound covering consisting of silicate cotton or slag wool held between
a sheet of metal, plain or corrugated, and a sheet of wire netting, or between two
sheets of wire netting, substantially as described and shewn in the drawing.
2. In combination with the silicate cotton or slag wool between sheets of wire
netting or sheet metal and wire netting, the laths or strips with or without sheets
of paper or equivalent material, substantially as described and shewn in the
drawing.
.
3. In combination with the compound covering described, the coating of plaster
or cement h applied substantially as described and shewn...
4. The method of fixing together the component parts of the compound covering,
and of fixing the compound covering in place substantially as described.
Dated this 26th day of March 1806