Improvements in or connected with Expansion Joints for Tubes or Pipes.
Year: 1895

page_text: Date of Application, 7th Aug., 1895-Accepted, 7th Sept.,
1895
GUMI LEIE DI PULTIVATION.
Improvements in or connected with Expansion Joints for Tubes
or Pipes.
We, HERMANN HOWALDT and ERNST SCHWERDTFEGER both of Kiel in the
Kingdom of Prussia and Empire of Germany Manufacturers 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, reference
being had to the drawings hereunto annexed and to the figures and letters marked
thereon that is to say :-
Our invention relates to improvements in or connected with expansion joints for
tubes or pipes, and has for its object to simplify the construction of such joints
and to render the same stronger, more durable, more compact and more efficient
than heretofore.
Referring to the accompanying drawings in which like parts are indicated by
similar letters of reference,
Figure 1 represents a front elevation of an expansion joint constructed according
to the present invention.
Figure 2 is a plan thereof and
Figure 3 is a longitudinal section thereof.
A represents the main pipe or conduit and B represents a socket box or chamber
to receive the main pipe A and which constitutes a union for several other branch
pipes.
The main pipe or conduit A which is of smaller diameter than the interior of
the box chamber or union B is mounted within the box or union B with capability
of endway movement with relation thereto and in order to make a tight joint
therewith the box or union B is furnished with glands and stuffing boxes 1 to
receive packing material which finds an abutment against loose rings shouldered
to take a bearing upon the box or union B and a perfectly tight joint is thus made
between the parts.
The main pipe or conduit A is at one end closed by means of a cap or stopper a
whilst at the other end it is furnished with a flange a2 by the aid of which it may
be connected to another length of pipe or otherwise whilst around its circum-
ference but within the box or union B it is formed with a number of slots or
openings a', or they might be of other form which constitute passages for steam
water or the like, and the box or union B is at its sides formed with several flanged
ways to which branch pipes may be connected by means of bolts and nuts as
will be readily understood."
By the arrangement of parts hereinbefore described the main pipe or conduit A
is free to move longitudinally with relation to the box or union B thus compen-
sating for the expansion or contraction of the parts whilst the fluid surrounds the
pipe A within the box B the fact of the pressure of the fluid passing through the
conduit A and box B being equal upon all parts of the joint enabling the latter
to be kept in a perfectly tight condition and materially reducing the wear and
strain thereon.
The expansion joint hereinbefore described is applicable to conduits for steam,
water, gas or other fluid under pressure.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
An expansion joint for pipes or tubes comprising a union box or chamber at each
end fitted with glands and stuffing boxes, a main pipe or conduit at one end closed
and passing through the stuffing boxes with capability of endway movement a
number of slots or openings in the main pipe or conduit located within the box or
chamber and several flanged ways communicating with the interior of the box or
chamber for the reception of branch pipes substantially as herein shown and
described and for the purpose stated.
Dated this 7th day of August 1895.
WHITE & WOODINGTON,
27 Southampton Buildings, London, Agents.