An Improved Screwed Joint for Wrought Iron and other Pipes.
Year: 1892

page_text: Date of Application, 12th Sept., 1892
Comp.ete Specification Left, 10th July, 1893-Accepted, 12th Aug., 1893
PROVISIONAL SPECIFICATION.
An Improved Screwed Joint for Wrought Iron and other Pipes.
1, WILLIAM LEWIS, Engineer of 10 Standford Road Brighton do hereby
declare the nature of this invention to be as follows:-
This invention consists of an improved form of running socket and backnut for
wrought iron and other pipes which are joined by means of a thread or screw.
What is termed a running joint is usually made by having a long thread or screw
on the end of a pipe. On this thread is first screwed a backnut & then a socket.
The extreme end or face of the socket is turned or cut off square & flat, and the
face of the backnut which comes in contact with this end of the socket has likewise
a turned square or flat face. When this pipe is connected to another by means of
the socket, red lead & hemp are usually placed on the thread of the pipe behind
the socket. The backnut is then screwed up so that its flat face presses the red lead
& hemp against the flat face at the end of the socket & this forms the joint.
Now according to my improvements the end of the socket is turned so as to be of
conical or tapering form, and the extreme end, which is thin, is turned off square or
flat. The backnut is of greater thickness and depth than those usually employed, in
order that it may be bored of conical or tapering form for a part of the depth so as
to fit over the tapering end of the socket; then there may be a small portion of
Hat face to come against the flat end of the socket; and beyond this there is the
usual thread. The total depth of this backnut is about twice that of one of those
now generally used.
In making a running joint the parts are put together in the usual manner viz. the
backnut is first screwed on the long thread on the end of the pipe, & then the socket.
After the socket has been screwed up to its final position the taper end is covered
with any plastic material such as red lead or the red lead may be placed inside that
part of the backnut which has been bored. The backnut is then screwed up against
the end of the socket and not only is a joint made in the usual manner between the
flat end of the socket & the flat face in the backnut, but also by means of the bored
tapering part of the backnut fitting over the turned tapering end of the socket.
This forms a comparatively long & closely fitting joint & may be made to compress
the end of the socket so as to force it very tightly on to the thread or screw of the
pipe. Such a joint has much greater surface of contact than that obtained with
a backnut & socket now generally used, and is capable of resisting a much higher
pressure.
Dated this 19th dox of Sentember 1892.
WILLIAM LEWIS.
COMPLETE SPECIFICATION.
An Improved Screwed Joint for Wrought Iron and other Pipes.
I, WILLIAM LEWIS Engineer formerly of No. 10 Standford Road, Brighton
ow of Furze Leigh, Florence Road Brighton do hereby declare the nature of this
nvention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention consists of an improved form of socket and backnut for wrought
ron and other pipes which are joined by means of a thread or screw.
According to my improvements the end of the socket is turned so as to be of
conical or tapering form, whilst the extreme end which is thin is, turned off flat or
quare. The backnut is of greater thickness and depth than those usually employed,
Price R71

page_text: WILLIAM LEWIS.