Improvements in Linings or Coverings for Walls, Ceilings, and other places.
Year: 1892

page_text: Date of Application, 15th Mar., 1592
Complete Specification Left, 14th Jan., 1893-Accepted, 18th Fch., -1893
PROVISIONAL SPECIFICATION.
Improvements in Linings or Coverings for Walls, Ceilings, and
other places.
I, ROOKES EVELYN BELL CROMPTON of Mansion House Buildings, Queen
Victoria Street, in the City of London, Engineer do hereby declare the nature of
this invention to be as follows:-
This invention relates to an improved wall lining or covering, or lining or
covering for ceilings and other places and consists of a thin, or comparatively thin,
surface of a composition mainly composed of asbestos embossed in approved design
when in an incomplete, or in a softened condition by aid of moisture, or heat, or
heat and moisture, and then dried and painted, coloured or similarly covered with
a protective or decorative coating.
This covering has the advantages of being readily applicable and fire resistent.
Dated the 15th day of March 1802
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, W.C., Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in Linings or Coverings for Walls, Celings, and
other places.
I ROOKES EVELYN BELL CROMPTON of Mansion House Buildings, Queen
Victoria Street, in the City of London, Engineer 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 :-
This invention relates to an improved wall lining or covering, or lining or
covering for ceilings and other places and consists of a thin or a comparatively
thin surface of a composition mainly composed of asbestos embossed in approved
designs the embossing being carried out by rollers, or by dies, when the asbestos
composition is in a softened condition, such softening being obtained by the aid of
moisture, or heat and moisture, the embossed materials being afterwards dried,
coloured and decorated by paints, varnishes, or other coatings, applied decoratively
and protectively or protectively only.
The object of my invention is that of rendering fireproof the surfaces of walls, or
partition walls, and more particularly the ceilings of dwelling houses, by covering
them with a fire resistent covering so that the said surfaces shall be protected and
capable of resisting the action of currents of heated air, or flame accidentally
directed on to them and thus the spread of the fire from room to room, or from floor
to floor may be prevented.
•
I emboss the fire resistent covering and stiffen it in such a manner as that, on the
one hand, it can be made to adhere to the walls, be easily decorated, and stand the
ordinary wear and tear and on the other hand, the unsightliness is avoided which
must always attend the use of such material if the surface is plain and undecorated;
I find that by embossing suitable qualities of asbestos millboard and stiffening and
or backing them as hereinafter described, I can obtain an excellent fire resistent
covering which has all the above properties. In order to obtain the advantages
that arise from the aforesaid embossing and stiffening in the highest degree it is
necessary to emboss in very considerable relief so that when the covering is dried
stiffened and hardened a large proportion of the entire protecting surface is either
not in direct contact with the undersurface which is to be protected but is separated
P77
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page_text: therefrom by air spaces or these spaces may be filled with various resistent or inert
filling plasters, or compositions such as slag wools or other non-inflammable or
resistent materials which have the effect of preventing the transmission of heat from
the flame to the material it is intended to protect.
According to one method of putting my invention in practice, I take sheets of
asbestos millboard and subject them to a sufficient softening process by soaking,
steaming or other equivalent process I then pass the sheet through say embossing
or shaping rollers consisting of one roller having the design engraved or otherwise
prepared in intaglio and a second roller which may be either a counterpart roller or
may be formed of soft material so as to follow up and press the softened sheet into
the recess of the pattern on the first roller, or I may effect the desired shaping by
any other equivalent means. After this sheet has been embossed and properly
dried I stiffen it either with a fire resistent size or I coat it with or apply to it one
or several layers of an asbestos paint which for economy may consist of refuse
asbestos ground up and mixed with a suitable medium to such an extent as to give
it sufficient stiffness to enable it to resist the ordinary pressure it will be subjected
to in use.
The protective efficacy of the sheets may be further increased by filling up
substantially the whole of the embossed portions with any suitable non-inflammable
non conducting substance which may conveniently consist of finely divided asbestos
mixed with suitable mediums to enable it to adhere to the back of the sheets the
said paste or composition being of a sufficiently porous or resistent character to
make it a poor conductor of heat. According to another method having previously
embossed and dried the asbestos sheet and laid it with the outer or face side down-
wards fill up all the portions that are in relief with a finely divided material by
preference mainly composed of refuse asbestos or with any other suitable finely
divided material such as slag wool, which possesses the two fold quality of being
fire resistent and a bad conductor of heat, and if desired to the back of the first
sheet I attach a second or flat sheet of plain material which may be either thin
asbestos millboard or a cheaper material such as canvas, or canvas coated with
asbestos paint. The embossed portions may be filled with the filling referred to
whilst the asbestos sheet is still wet and soft (so as to facilitate adhesion).
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 :-
1. The manufacture or construction and use of fire resisting surfaces or coverings
for walls and ceilings consisting of embossed and stiffened asbestos sheets with or
without a suitable filling material substantially as and for the purposes herein
described.
2. The hereinbefore described manufacture or construction and use of fire resistent
surfaces, for ceilings, walls or other places consisting of a surface or sheet of
embossed and stiffened non-inflammable material, substantially as and for the
purposes set forth.
Dated the 13th day of January 1893
the 13th day of January 1803
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.