Improvements in Non-conducting Jackets for Steam Boilers, Hot- water or Hot-air Pipes, and the like.
Year: 1892

page_text: Date of Application, 7th June, 1892-Accepted, 23rd July, 1892
COMPLETE SPECIFICATION.
Improvements in Non-conducting Jackets for Steam Boilers, Hot-
water or Hot-air Pipes, and the like.
I, CARL BÖTTER of Leopoldshöhe, in Lippe, Germany, 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:
The object of my invention is to construct a non conducting jacket or casing for
steam-boilers steam pipes, hot water- or hot air-pipes or the like which while being
very effective as heat preserver is easy of construction in itself, which may be
easily adapted to any existing pipes or reservoirs and which is of little specific
gravity.
The manner in which I prefer to carry my invention into effect is indicated in
the following description and illustrated by the accompanying drawings.
A number of thin flexible sheets of paste board-covered previously on both sides
with a non conducting composition consisting of kieselguhr (infusorial earth or
fossil meal) and some binding medium-are laid on each other so as to form a layer
of the required thickness and joined by fasteners a (Figs. 1 & 2). Into slits 6 in
the head of these fasteners are introduced U shaped strips of sheet-metal c. When
the paste board is bent around a pipe so as to form a jacket or casing, the U shaped
strips e will intervene between the paste-board casing d and pipe e (Figs. 5 & 6)
thus forming an air space f which protects the paste board from the contact with
the heated surface of the pipe and still more diminishes the radiation of the heat.
The casing may be strengthened by metal strips or hoops g surrounding it on the
outside. These hoops are provided with slits h through which the legs i of the
fasteners are put and afterwards bent down (Fig. 7).
The heads of the fasteners need not necessarily be inward as indicated in
Figs. 1 & 2, but may be placed outward as in Figs. 3 & 4; but in the latter case
the metal strips c must be provided with slits so that the legs of the fasteners might
be put through the slits and bent over.
Instead of being held together by metal hoops the casings may also be tied
together by a string and fastened to the pipes.
When flat surfaces-or surfaces of machine parts liable to concussion or other
injury, or such round surfaces where the size of the sheet of paste board would not
suffice to form the complete casing-are to be covered over, thin metal sheets may
be used inside or outside in connection with the paste board or the whole of the
paste board casing might be surrounded by an outer metal casing as indicated in
Fig. 8.
Besides the already mentioned advantages of easy construction and adaptability
to pipes or surfaces of any shape whatever and its lightness, the cost of production
is very slight and the system is altogether independent of the object itself the heat
of which it is meant to preserve.
Expansion or contraction of the object covered over by this casing will therefore
not affect its durability, it cannot come off as is the case with all non conducting
compositions put on direct on the heated surface and that surface may be smooth or
rough.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is carried into effect I declare that what
I claim is:-
A non conducting (heat preserving) jacket or casing consisting essentially of a

page_text: non conducting material in combination with means for keeping said casing at a
distance from the object to be covered over so as to form an isolating air space
between the object to be covered and the casing substantially as described.
Dated this 7th day of June 1892.
C. R. BONNE & Co.,
57 & 58, Chancery Lane, W:C., Authorised Patent and Trade Mark Agents.