Boilers to Prevent the Escape of Heat.
Year: 1886

page_text: Date of Application, 15th July, 1886.
Complete Left, 15th Apr., 1887.
Complete Accepted, 28th June, 1887.
Boilers to Prevent the Escape of Heat.
I, ALBERT HAACKE of 114 Fenchurch Street in the City of London Merchant
and Manufacturer do hereby declare the nature of this invention to be as
follows:-
It is a non-conducting covering in the form of a powder to be applied as hereinafter
described to Marine Locomotive and Stationary Boilers of whatsoever shape or form
but for convenience sake, I have confined myself in the following description to
boilers of cylindrical form.
My Invention refers to the use of strong Iron hoops and Iron plates the hoops (to
be fastened in the usual way with clips and bolts) encircling the boiler at suitable
of
intervals but to be kept at a certain distance from the boiler by means
non conducting elastic bodies such as Asbestos millboard or cork pieces or a
combination of both or others.
The Iron plates are fastened to the outside of such Iron hoops, by screws and the
space between these plates and the boiler is filled with a mixture of Kisselguhr
(infusorial earth) with small quantities of cork fibre and glutinous matter
(such as flour starch or others) the whole forming an almost dry powder.
The Boiler is to be covered when cold and the iron plates before referred to which
I purposely make of small size are then screwed into position outside the hoops. All
the holes are drilled and tapped before putting the hoops round the boiler and by
working to gauge, I find no difficulty in placing the whole frame work quickly in its
exact position.
As soon as I have fixed the lowest row of Iron plates the nonconducting powder is
rammed into the empty space formed between the boiler surface and outer metal sheet,
then the second row of plates is fixed the empty space filled and so on to the top of
the boiler.

page_text: As soon as the boiler thus covered becomes heated it expands and presses the
nonconducting powder against the outer metallic cover, which owing to the
interposition of the non conducting and elastic bodies does not become heated and
remains stationary or nearly so.
Under the effect of this pressure assisted by the heat, the nonconducting powder
is formed into one continuous elastic sheet of sufficient cohesion to prevent it from
dropping off in case one of the iron plates is removed or from settling down and
leaving empty spaces owing to vibration.
The nonconducting sheet does not become hard and caked, but on the other hand
remaining soft and elastic accomodates itself to the expansion and contraction of
the Boiler and always occupies the whole space between the boiler surface, and outer
metal covering.
Should it become necessary to examine or repair any portion of the Boiler shell,
the iron plate covering that portion of the boiler can simply be taken off, and so much
of the nonconducting sheet as is necessary, may be removed without interfering with
the remainder and after such examination and repairs the nonconducting mixture and
the iron plates may be again screwed into its position.
As all fireproof nonconductors such as Kieselguhr, Silicate Cotton, Asbestos &c.
loose a great deal of their nonconducting properties by being made into an adhesive
paste I gain a considerable advantage in efficiency by being able to use the Kieselguhr,
in the form of a powder, and yet avoid by the method above described the disadvantage
of settling down and leaving empty spaces between the outer metal covering and the
boiler surface.
CLL 1000

page_text: Boilers to Prevent the Escape of Heat.
I ALBERT HAACKE of Kieselguhr Wharf Hackney Wick in the County of Middlesex
and late of 114 Fenchurch Street in the City of London Merchant and 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:-
It is a nonconducting covering in the form of a powder to be applied as hereinafter
described to Marine Locomotive and Stationary Boilers of whatsoever shape or form
but for convenience sake, I have confined myself in the following description to boilers
of cylindrical form.
My invention refers to the use of strong iron hoops and iron plates, the hoops to be
fastened in the usual manner with clips and bolts encircling the boiler at suitable
intervals, but to be kept at a certain distance from the boiler by means of nonconduction
elastic bodies such as Asbestos millboard or cork pieces or a combination of both or
others. The iron plates are fastened to the outside of such iron hoops by screws and
the space between these plates and the boiler is filled with a mixture of Kieselguhr
(infusorial earth) with small quantities of cork fibre and glutinous matter (such as
flour starch or others) the whole forming a dry or almost dry powder, the proportions
of such mixture being for example, three per cent. of Cork, three per cent. of fibre,
four per cent of Glutinous matter and ninety per cent of Kieselguhr, such example
however being varied for specific purposes as for instance in steam pipes when
Asbestos fibre would be substituted for cork.
The boiler is to be covered when cold and the iron plates before referred to, which I
purposely make of small size are then screwed into position outside the hoops, all the
holes are drilled and tapped before putting the hoops round the boiler and by working
to guage I find no difficulty in placing the whole framework quickly in its exact
position.
As soon as I have fixed the lowest row of iron plates the nonconducting powder is
rammed into the empty space formed between the boiler surface and outer metal sheet,
then the second row of plates is fixed, the empty space filled and so on to the top of
the boiler.
As soon as the boiler thus covered becomes heated, it expands and presses the
nonconducting powder against the outer metallic cover, which owing to the interposition
of the nonconducting and elastic bodies does not become heated and remains stationary
or nearly so.
Under the effect of this pressure assisted by the heat the nonconducting powder is
formed into one continuous elastic sheet of sufficient cohesion to prevent it from
dropping off in case one of the iron plates is removed, or from settling down and
leaving empty spaces owing to vibration. The nonconducting sheet not becoming

page_text: hard and caked, but on the contrary remaining soft and elastic, accommodates itself to
the expansion and contraction of the boiler and always occupies the whole space
between boiler surface and outer metal covering.
Should it become necessary to examine or repair any portion of the boiler shell,
the iron plate covering that portion of the boiler can simply be taken off and so much
of the nonconducting sheet as is necessary may be removed without interfering with
the remainder and after such examination and repair the nonconducting mixture and
the iron plate may be again screwed in its position.
As all fire proof nonconductors such as Kieselguhr, Silicate, Cotton, Asbestos &c.
lose a great deal of their non conducting properties by being made into an adhesive
paste I gain a considerable advantage in efficiency by being able to use the Kieselguhr
in form of a powder and yet avoid by the method above described the disadvantage of
its settling down and leaving empty. spaces between the outer metal covering and the
boiler surface.
I claim in this my application all such uses of my said Invention to Boilers of any
shape or form and all such modifications of the same as properly come within the scope
of my said Invention.
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 use of nonconducting elastic bodies such as asbestos millboard or cork
pieces to preserve an interval of space between the surface of Boiler and the
iron plate forming the outer metal covering and which bodies being elastic
provision is made for the law of expansion by heat in the manner hereinbefore
described.
2. The use of a nonconducting elastic mixture of Kieselguhr and other substances
forming a dry or almost dry powder which is pressed into the interval of space lastly
described between the surface of boiler and the outer metal covering and which
mixture being elastic provision is made for the law of expansion by heat
and the perfect continuity of such nonconducting surface in the manner hereinbefore
described.
3. The adaptation of outer boiler plates of small size to form the metal covering,
such plates being specially adapted to suit the use of the said nonconducting powder,
in permitting the removal and reinstating of the powder upon a small surface of the
boiler without interfering with the remainder of the covering.
4. The adaptation of my said Invention to boilers of all shapes and sizes.
Dated this 11th der of Anril 1887
HARE & Co.
Agents.