Improvements in Metallic Joints for Boilers and other Apparatus.
Year: 1893

page_text: Date of Application, 20th May, 1893-Accepted, 8th July, 1893
COMPLETE SPECIFICATION.
Improvements in Metallic Joints for Boilers and other Apparatus.
We, JULES NICLAUSSE and ALBERT NICLAUSSE, both of 24 Rue des
Ardennes, Paris in the Republic of France, Civil Engineers, 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 :-
If one of the tubes forming part of a boiler is supported at the same time at
two places by two parallel plates and it is wished to ensure a tight joint at
these two places by contact between the tubes and the plates, the difficulty of
practically doing this simultaneously is very great in the case of joints formed of
cones made entirely of metal. The difficulty increases when the tubes of a boiler
are interchangeable and are often taken out and put in place again.
We have therefore devised several combinations which allow us to succeed in
this operation. They constitute an improvement applicable not only to our boiler
patented on January 20th 1891, No. 1052 but also to other boilers as well as to
any other apparatus having the same requirements.
These combinations are not only applicable to tubes, but to any piece either
solid or hollow of which two portions should at the same time form tight joints by
means of metallic cones upon two parallel plates.
The arrangement about to be described may be applied to form at the same time
joints at three, four or any other number of places of one piece, with three, four
or any other number of plates or parallel pieces.
Our combination is shown in Figures 1 and 2 of the drawing.
A is a tube or any piece of cylindrical form carrying at one end a cone a and at
another point on this tube a cone b.
These two metallic cones point in the same direction.
The plates C and D represent the opposite walls of the collector of our patented
generator. It is upon these two parallel walls that the cones a and b bear.
The latter cone is relatively rigid, but the first a is hollowed internally in such
a manner that it is thin and consequently elastic.
The manufacture is carried out in such a manner that when the tube is being
put in place the elastic cone a always bears first, the distance between the two
cones having been calculated with this object.
In pressing upon the tube to force it in, the elasticity of the cone a allows the
cone to take its bearing. When this is done both joints are tight.
This arrangement therefore allows of often removing and replacing the tubes or
pieces of a boiler constructed as above described with the certainty of forming
tight joints.
The tube shown in Figure 1 is slightly bent inwards at the end carrying the
flexible cone in order not to increase the diameter of the hole in the tube plate
when the space between the different holes does not allow the size of these holes
to be larger than the tubes.
Figure 2 shows a tube A or any cylindrical piece bearing at its two ends upon
two parallel plates CD. In this case both metallic joint cones a¹ 61 are elastic.
If in consequence either of the scarfing or of the effects of expansion, there exists
a slight difference in the length of two of the tubes between the two plates, this
combination nevertheless ensures tight joints.
This combination may be applied not only to our patented boilers but also to
boilers of locomotive and other boilers of the same kind the tubes of which form
ioints at each end upon a tubular plate.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
.
1. The arrangement of metallic joints for boilers and other apparatus which
consists in the combination upon a same tube or piece of a rigid metallic cone and
a flexible metallic cone as shewn at Figure 1 and as above described.
2. The arrangement of metallic joints for boilers and other apparatus which
consists in the combination upon a same tube or piece of two flexible metallic
cones as shown at Figure 2 and as above described.
Dated this 20th day of M. 1902
CARPMAEL & Co.,
Agents.