Improved Coupling for Heating and Brake Pipes.
Year: 1890

page_text: Date of Application, 30th Aug. 1890
Complete Specification Left, 11th May, 1891-Accepted, 20th June, 1891
PROVISIONAL SPECIFICATION
An Improved Coupling for Heating and Brake Pipes.
We, JULICS DUNKEL, of Breslau, Germany, Engineer, and ROBERT DUNKEL,
of Danzig, Cermany, Merchant do hereby declare the nature of this invention to
be as follows :—
This invention has reference to a coupling for heating pipes or brake pipes
which comprises a sleeve-nut, a tube end of piston-form, and a screw threaded
tube end.
When applied to brake pipes, the tube end of piston form is furnished with a
cup leather packing.
When applied to heating pipes the said end is fitted with self-tightening metallic
piston rings.
In the accompanying drawings
Fig. 1 illustrates in side elevation the arrangement of the couplings for the
heating and brake pipes between two adjacent cars.
the
Fig. 2 is a front elevation thereof.
Fig. 3 is a longitudinal section to a larger scale, illustrating the construction of
pipe coupling.
Fig. 4 is a longitudinal section illustrating a modification of the same.
a is one, and the other of two abutting car buffers.
ce are the cross beams or head stocks of the cars through which the buffers
project.
dande are the end portions of the heating and brake pipes of two adjacent cars,
these end portions being connected together by the pipe coupling f. All parts
marked are pipe couplings made jointed or flexible as in the arrangement shown.
The dotted arcs of circles in Fig. 1 show how the pipe ends can be shifted by
reason of the construction of the coupling. A pipe coupling constructed according
to this invention comprises a sleeve nut A Fig. 3 a tube end B of piston form, and
an externally screw-threaded tube end C. DD are the pipes to be coupled which
may be connected with the coupling by means of unions such as F. The sleeve
mut A., and the tube end C are adapted to engage with each other by means of
screw threads at G. H is a leather collar which acts as a packing for the tube or
piston end B. Instead of this packing H the arrangement shown in Fig. 4 may be
used consisting of two piston rings J held together by a ring K.
Dated this 30th day of August 1890.
COMPLETE SPECIFICATION.
An Improved Coupling for Heating and Brake Pipes.
We, JULIUS DUNKEL, of Breslau, Germany, Engineer, and ROBERT DUNKEL,
of Danzig, Germany, Merchant, do hereby declare the nature of this invention and
in what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
This invention has reference to a coupling suitable for heating pipes and for
brake pipes, and comprises a sleeve nut, a tube end of piston-form, and a screw
threaded tube end.

page_text: When applied to brake pipes, the tube end of piston form is furnished with
a cup leather packing.
When applied to heating pipes the said end is fitted with self-tightening
metallic piston rings.
In the drawings left with my Provisional Specification
Fig. illustrates in side elevation the arrangement of the couplings for the heating
or brake pipes between two adjacent cars,
Fig. 2 is a plan thereof.
Fig. 3 is a longitudinal section to a larger scale, illustrating the construction of
the pipe coupling.
Fig. 4 is a longitudinal section illustrating a modification of the same.
a is one and is the other of two abutting ear buffers. e are the cross
heams or head stocks of the cars through which the buffer rods project. d and e
are the end portions of the heating or brake pipes of two adjacent cars, these
end portions being connected together by the pipe coupling All the parts
marked are pipe couplings made jointed or flexible as in the arrangement shown.
The dotted ares of circles in Fig. 1 show how the pipe ends can be shifted by
reason of the construction of the coupling. A pipe coupling constructed according
to this invention comprises a sleeve nut A Fig. 3, a tule end B of piston form
extemling centrally therethrough, and an externally screw threaded tube end C
having an internal conical ring adapted to fit within a correspondingly formed part of
the tube end B. D D are the pipes to be coupled which may be connected with
the coupling by means of unions such as E. The sleeve mit A and the tube end ('
are adapted to engage with each other by means of screw threads at . I is a
leather collar which acts as a packing between the tube or piston end B and the
nut A, when the pipes are to be used as brake or heating pipes. This collar is held
in place by a ring screwed upon the reduced portion of the tube or piston end as
shown. Instead of this packing 11 the arrangement shown in Fig. 4 inay he used,
this arrangement consisting of two piston rings J held together by a ring or nut K
screwed upon the said reduced portion of the tube or piston end.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. For heating or brake pipes for railway trains, a flexible coupling comprising
a sleeve nut, within which terminate with an air tight closure the emils of two tubes
to be connected, one of these ends consisting of a screw threaded part or shoulder
adapted to engage with the nut, and the other end cousisting of a part or shoulder
of piston form adapted to receive or engage the first mentioned tube end substan-
tially as hereinbefore described and shown.
2. The improved coupling constructed as hereinbefore described and shown in
Fig. 3, or modified according to Fig. 4.
T