Improvements in Couplings or Connections for Metallic Tubing.
Year: 1889

page_text: Date of Application, 22nd Jan., 1889
Complete Specification Left. 22nd Oct., 1889-Accepted, 23rd Nov., 1889
PROVISIONAL SPECIFICATION,
Improvements in Couplings or Connections for Metallic Tubing.
THOMAS IRVING CAMMELL Engineer 24 Calogan Terrace Victoria Park, E. do
hereby declare the nature of this invention to be as follows:—
This invention has for its object to provide an Improved Coupling or connection to
Metallic Tubing which class of Tubing may be illustrated as formed by spirally
winding a continuous metal strip having a double channelled or S shape in such a
manner that the edge of one of the channels of which is being wound is laid in the
other channel of the part already wound for which letters patent have been given after
being communicated by Eugene Lovavasseur and Henri Witzernmann both of 52 Rus
Turbigo Paris France.
The improved Coupling or connection has for its object to prevent soldering or
fixing by cement at end of tube and may be advantageously employed for any of the
purposes for which Metallic tubing Coupling connections are employed especially for
Water, Gas, Steam, & air purposes.
The improved Coupling or connection possesses greater durability than the ordinary
coupling and a full area or opening is given to the Tube; by this means friction is
reduced.
In carrying the said Invention into practice I employ an Indiarubber, Asbestos, or
composition ring, tube or washer; specially arranged to wind spirally on the outside
of the Metallic Tube; which Indiarubber ring etc.-being of an elastic nature easily
gives and adapts itself to any variations in the diameter and formation of the metallic
tube.
Further I employ a metal casing or covering to protect the India rubber, Asbestos
or composition ring, tube or washer part of which casing may be screwed to suit the
tubing, or longitudinal slits cut to act and give as a spring for griping the Indiarubber
liner to the tube; or conical seatings may be prepared which in any case the metal
covering being turned with the Indiarubber liner on the spiral metallic tube, is, when
required hermetically sealed & fixed to the Tube by a Lock or Jam Nut.
The Lock or Jam nut may be constructed whereby the nut acts on the longitudinal
slits or conical seatings arranged in the metal casing: by so doing it gives a grip to
the India rubber, Asbestos, or composition ring tube or washer on to the Metallic
Tube whon fixing; the Lock Nut may also be screwed to the spiral curve or guage of
Tubing.
The metal casing and Indiarubber liner move on the spiral metallic tubing in an
opposite direction to the Lock Nut when Coupling or connection is required to be
fixed and made secure to the tube; by this means when the parts come in contact they
effectually lock and fix themselves to the tubo.
The outer end of coupling or metal casing may be bulged out and slots cut longi-
tudinally to allow a sufficient elasticity to force over a common gas pipe connection
in the usual manner or it may be screwed or formed on any approved plan as
heretofore.
Dated this 22nd day of January 1889.
TITNA
CEA MEAL INTL

page_text: COMPLETE SPECIFICATION.
Improvements in Couplings or Connections for Metallic Tubing.
I THOMAS IRVING CAMMELL of 24 Cadogan Terrace Victoria Park London in the
County of Middlesex 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 :—
This invention has for its object to provide an improved coupling or connection
to metallic tubing such as is formed by spirally winding a continuous metal strip
approximately of S shape in cross section, in such a manner that the edge of one
of the channels while being wound is laid into the other channel of the part
already wound or such as the spirally wound tubing forming the subject of Letters
Patent No. 9478 of the year 1885 granted to Henry Harris Lake. For this
purpose I employ an india rubber, asbestos or composition ring, tube, or washer
(preferably having an inside scrow thread formed to suit the spiral convolutions of
the metallic piping so as to be capable of being screwed thereon outside) which
being of an elastic nature easily gives and adapts itself to any variations in the
diameter and formation of the metallic tubing and may be subsequently com-
pressed in various ways by means of gland nuts or lock nuts in the manner
illustrated by the accompanying drawings in all the figures of which the same
reference letter indicates the same or similar parts.
Figures 1, 4 and 5 are sectional views of three different forms of coupling or
connection suitable for connecting the spirally wound tubing with ordinary. screw
threadod gas water or steam piping. Figure is a sectional view of a coupling
or connection suitable for connecting the spirally wound tubing with a spring
socket lined with india rubber as usually employed to make a connection with
various gas fittings. Figure 3 is an end view of the same with the lock nut
removed. Figure 6 is a sectional view of a coupling or connection for uniting
two ends of the spirally wound tubing and Figure 7 is a sectional view of a
coupling or connection for uniting lengths of the spirally wound tubing of unequal
diameters.
In Figure 1 A is the spirally wound tubing upon which the india rubber,
asbestos or composition ring, tube or washer B has been screwed and upon which
it is compressed by means of the two connecting pieces C and D which are
screwed together for that purpose.
In Figures 4, 5, 6, and 7 the spirally wound tubing A is made to screw into
a suitably threaded portion of the coupling or connection and is hermetically
sealed therein by means of an india rubber, asbestos or composition ring, tube or
washer B compressed by the nut D as in Figure 4 or the nut D engaging upon
the outside of the spirally wound tubing and capped by the cap E to relieve the
strain of the nut D upon the spirally wound tubing as in Figure 5 or the nuts D
or D acting upon specially formed tapered rings tubes or washers as in Figure 6
or by the same arrangement of screw nut D adopted in Figure 1 and repeated
in Figure 7 to show the application of the couplings or connections for connecting
ends of the spirally wound tubing of unequal diameters.
In Figure 2 the spirally wound tubing A with its tubular washer B screwed
thereon is shown introduced into the end of a coupling or connection suitable for
attachment to nipples enclosed by a spring clip H in the usual way. The extremity
of the coupling or connection is divided, by a suitable number of longitudinal
slots, into a number of portions G G¹ GG (Figure 3) which are closed together
and on to the tubular washer B by means of the lock nut D.
In all the modifications the coupling or connection is shown as applied and as
forming the herinetically scaled joint by contact with the exterior of the spirally
wound tubing leaving the full way of the tube according to its diameter clear for
the flow of air steam or liquid without obstruction.

page_text: 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 construction of couplings or connections for spirally wound tubing in which
the required hermetically sealed joint is produced by compressing upon the exterior
of the spirally wound tubing an india rubber, asbestos or composition ring tubo
or washer with or without forming a screw thread in the coupling or connection
to receive the external convolutions of the spirally wound tubing substantially as
described.
Dated this 22nd day of October 1889.
AYRTON & THOMAS,
Agents for tho Applicant.