Thin Metal Piping having Spiral Grooves formed thereon, and Joints therefor.
Year: 1898

page_text: Date of Application, 20th June, 1898-Accepted, 13th Aug., 1898
COMPLETE SPECIFICATION.
Thin Metal Piping having Spiral Grooves formed thereon, and Joints
therefor.
We, THOMAS BROOKS, of Fremantle, Western Australia, Plumber, and ALLAN
MURRAY AYLES, also of Fremantle aforesaid, Harbour Department Officer, do
hereby declare the nature of our 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 the manufacture of light metal piping having a
spiral screw, worm or similar grooved formation made therein or thereon preferably
by rolling or pressing. By the term light or thin metal piping we mean such
piping as galvanised or black sheet iron or other similar light metal material in
contradistinction to thick metal such as wrought or cast iron piping or tubing
which is made or formed with screw threads which are cut into or recessed in latter
form of pipes for use in connection with water, steam, or gas and which latter
referred to form and make of pipes are well known.
The special object of this invention is to provide a means of jointing or of union
without the aid of soldering or telescoping the pipe end as is the present mode and
it is obvious that this invention possesses many advantages over the ordinary plain
piping now in use while the cost of forming these screwed grooves thereon is of a
minimum amount.
By means of our invention light piping may easily and rapidly be jointed
together and in a water and air tight manner. When it is desired to join two
lengths of pipes together and where a fixed gap exists between a union piece may be
employed which is formed with a right and left handed screw or worm.
In order to clearly set forth our invention reference may be made to the accom-
panying drawings in which
Figure 1 illustrates the pipe ends as formed with this invention screwed tele-
scopically and connected together, the inner pipe being shown in elevation and
the screw portion of the outer and enclosing pipe being shown in section.
Figure 2 shows the application and use of the union piece as formed with a right
and left handed screw.
In these drawings A is the light metal piping having formed thereon the screw
or worm shaped paths or grooves as B.
Crepresents the inner pipe and D the screw formation of same.
In Figure 2 E denotes the union piece having the right and left hand screw or
wormed grooves as F and G which respectively connect and screw into the ends
of the piping H and J as shown. These screwed grooves or worms may be formed
by rolling, pressing or by other approved mechanical means or otherwise, further
the screw may be of any section or pitch although in practice a ferruled or rounded
section of worm will be found to be the best for practical purposes.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:
1. Light or thin metal piping having a spiral screw or a worm shaped groove or
such like formation made therein or thereon either by rolling, pressing, or other
equivalent means, substantially as and for the purposes herein set forth and
specified and as illustrated in the accompanying drawings.
Dated this Twentieth day of June 1898.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.