Improvements in Heat-non-conducting Means for Protecting Steam Boilers, Pipes, and other Surfaces.
Year: 1891

page_text: Date of Application, 22nd May, 1891-Accepted, 27th June, 1891
CUMILIM DIM
Improvements in Heat-non-conducting Means for Protecting Steam
Boilers, Pipes, and other Surfaces.
1
I, FREDERICK ERNEST GOUGY of 143 Boulevard Montparnasse, Paris, France,
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 :-
Heretofore many different means have been employed for protecting conduits or
vessels against cooling by radiation or against heat from without; various
insulating bodies have been used for this purpose and amongst these also cork. But
of the heat nonconducting coverings in use some have the inconvenience of quickly
deteriorating or getting out of order so that the insulation desired no longer exists;
while others are too costly or their application takes too much time and above all
requires special workmen, thus rendering the application thereof difficult.
The object of my invention is to provide a kind of heat, nonconducting covering
based upon the application of a material of wellknown efficacy viz. cork, which I
employ in the form of very small pieces or coarse powder and enclose in an envelope
of linen or other suitable fabric forming continuous or other pads which are fixed
by any suitable means upon the surfaces to be protected thereby.
For covering pipes or cylindrical or other bodies, I construct continuous pads
varying in size and thickness as required and which are wrapped helically
around the pipe or apparatus to be protected or which if preferred may be applied
lengthwise.
For covering cylinder covers or other similar surfaces I make pads which as
required are made so that one suffices for protecting the whole surface or so that
two or more are placed side by side upon the surface.
The covering stuffed with cork may be made in one or more pieces, but in
general I make it in one piece with the sides united by sewing, by glueing or both,
the glue being such as not to be affected by the heat; I may also use sheaths
not sewn or multiple sheaths separated by partitions and various other forms.
Sometimes it is well to steep the pads in silicate of soda and then let them dry in
order that they may not be affected by the action of the heat to which they are
exposed during use.
On the other hand it is useful after having applied the nonconducting pads to the
surface to be protected (for instance after having wound the same helically round a
pipe, taking care that the coils come close) and after having fixed them for
instance by tying metal wire around, to cover them with a thin layer of plaster,
then putting a covering of some fabric upon it and lastly to coat the latter with one
or more coats of paint. These additional precautions are intended to ensure a
perfect insulation but are not indispensable.
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.
The nonconducting covering for protecting surfaces exposed to heat radiation, or
to heat from without, consisting of continuous or other pads of any suitable size
and thickness made in the form of an envelope stuffed with cork in fragments or
powder, such pads being covered or not after being fixed in place with a layer of

page_text: plaster with a fabric covering and one or more coats of paint, substantially as set
forth.
Dated this 22nd day of May 1891
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.