Improvements in or relating to Coverings for Boilers, Steam Pipes, and the like.
Year: 1898

page_text: Date of Application, suth DBC., 1898
Complete Specification Left, 21st Sept., 1899-Accepted, 4th Nov., 1899
Improvements in or relating to Coverings for Boilers, Steam Pipes,
and the like.
I, EDWARD WALWORTH BELL, of 3 & 4, Hampton Buildings, South Castle
Street, in the City of Liverpool, Merchant, do hereby declare the nature of this
invention to be as follows.-
Most boiler and pipe coverings at the present time cannot be removed without
being broken or crushed, and they are also liable to disintegrate through being
exposed to dampness or wet steam, and vibration
Now my invention is designed to form a pipe or boiler covering which can
be removed at pleasure without injury and which will combine all the valuable
qualities of probably the two most effective insulators known, namely, con-
fined an and asbestos
The invention consists in forming the asbestos covering of layers of asbestos,
so contrived by corrugation by impressing or otherwise as to contain numerous
air chambers enclosed therein, thus one section can be honeycombed night
through or better, have a series of thimble-like holes impressed into it so that
there is a hole on one side and a protruding boss on the other Alternate sections
can be flat or can be arranged with coniugations or even with similar thimble
like holes as the bosses being larger than the holes cannot enter into them and
consequently there is in all instances a tree an space 1ound the bosses and a
free an space in the holes. The outside covering can be of canvas or other
tough impervious material and the bosses showing through the canvas give it
a highly ornamental appearance In the case of pipes, the asbestos is built up
in the aforesaid manner into cylindrical pipes, say about two feet long These
are cut longitudinally at one point, and are covered with canvas having a pio-
Jecting flap to one of the two cut edges To apply them to the pipe the cylinder
18 pressed open at the cut inserted on the pipe, then pressed together and the
flap cemented with any desued material to the canvas on the other side of the
out To take it off therefore all that is required is to open the cemented joint
of the canvas and remove the material. In order to prevent the asbestos coming
to pieces it is preferably sewn at intervals with wue sewing Or the layers
which can be of asbestos felt or woven can be cemented together with silicate
or other suitable adhesive solution
DL 1 L
L Th
1000

page_text: Improvements in or relating to Coverings for Boilers, Steam Pipes,
and the like.
I, EDWARD WALWORTH BELL, of 3 & 4, Hampton Buildings, South Castle
Street, in the City of Liverpool, Merchant, 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.-
-
Most boiler and pipe coverings at the present time cannot be removed without
being bioken or chushed, and they are also liable to disintegrate through being
exposed to dampness or wet steam
Now my invention 18 designed to form a pipe or boiler covering which can
be removed at pleasure without hjuly and which will combine all the valuable
qualities of probably the two most effective insulators known, namely, con-
fined air and asbestos.
The invention will be understood from the following description, reference
being had to the accompanying diawings, in which,
Figure 1 is a peispective view of the improved pipe covering with the out-
side jacket of canvas raised at one coine;
Figure 2, a plan of the covering laid flat like a mattress in the form in which
it 18 usually applied to boilers
Figure 3 a cross section through the covering
The invention consists in forming the asbestos covering of layers of asbestos A
BO contrived by corrugation, impressing or otherwise as to contain numerous
au chambers B enclosed therein. This may be effected by having a series of
thimble-like hollows impressed into each layer so that there is a hollow on
one side and a protruding boss on the other, (this 18 clearly shown in Figure 3),
or each layer may be honeycombed The alternate sections or layers Care flat,
thus leaving the chambers B containing an The alternate sections or layers C
might however be arranged with coriugations, or even made with similai
thimble-like hollows, care being taken that the bosses are larger than the holes
so that they cannot enter into them Consequently there is in all instances a
fee air space round the bosses, and a fiee an space in the holes. D 18 an out-
side jacket of canvas or other tough impervious material, and the bosses in
cases where they show through the canvas, give a highly ornamental appear-
ance.
In the case of pipes the asbestos is built up in layers in the aforesaid manner
into cylindrical pipes, say about three feet fong as shown in Figure 1 These
are cut longitudinally at E, the cut being covered with the canvas jacket D
which overlaps the longitudinal cut To apply them to the pipe, the cylinder
18 pressed open at the cut E, inserted on the pipo, then pressed together, and
the overlapping jacket diawn over and cemented down over the cut When
this is accomplished in a workmanlike manner, it presents a neat and finished
appearance and gives the best results To take it off all that is necessary is to
open the cemented joint of the canvas D and remove the material
In order
to prevent the asbestos coming to pieces, it is preferably sewn at intervals with
we gewing The layers can be of asbestos felt or woven, asbestos, and the
canvas jacket can be cemented on with silicate 'or 'other suitable adhesive solu-
tion
1
In the case of boilers, cylinders etc the covering is preferably made in the
form of a flat covering of mattiass, stitched at the edges and covered with a
heavy canvas jacket. This is wrapped round the boiler or other object, and the

page_text: adjacent edges fastened by using staples or the layers can be laced together
In the mattrass form the covering is adapted for cylinders, drums, domes, stills,
breechings, uptakes, refrigerating chambers, besides boilers and other large
or irregular shaped surfaces, and the cylindrical form of covering is suited for
pipes, ella, tees, crosses, valves, electric conductors, etcetera By vutue of the
construction of this covering and the materials used, two of the most effective
insulators known to science are united and employed, for in addition to the
asbestos, which has no superior as a resister of heat or for fireproof qualities,
the indentations in the asbestos produce numerous confined air spaces, thus
asbestos and air are combined in this new or improved covering. It is light
in weight, will stand all extremes of heat, will not crack, and can be removed
and replaced as often as required. The special formation of the covering secures
flexibility and enables it to follow the bends of pipes without breaking or dis-
integration, and this is secured without making the asbestos into a plastic
state as was necessary hitherto The covering may be made of any desired
number of layers
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 improvement in coverings for boilers, steampipes and the like which
consists in forming them of layers of asbestos fastened together and so contrived
by corrugation, impressing or otherwise as to contain numerous air chambers
enclosed therein, substantially as and for the purpose described.
2 A covering for boilers, steampipes and the like consisting of a number of
layers of asbestos each so impressed that there are a series of depressions and
bosses formed therein, and a number of alternate asbestos layers so arranged
in conjunction with the other layers as to leave a free air space in the depres-
sions for holding air, substantially as described
3. In insulating coverings for pipes and other objects of the kind described
containing numerous air chambers enclosed therein, making said coverings in
cylindrical form and cutting them longitudinally at one point so that they
can be slipped on to the pipe or other object by pressing them open at the cut,
and then pressing them together again and the cut closed by cementing over it
a canvas lap, substantially as described
4 As a new or improved article of manufacture, the insulating, fireproof
flexible covering for boilers, pipes or other articles substantially as set forth
Dated this 20th day of September 1899
WN P. THOMPSON & Co.,
Patent Agents of Liverpool, Manchester, Birmingham & London.