Improvements in or connected with Pipes or Tubes for Conveying Water.
Year: 1896

page_text: Date of Application, 16th Sept., 1896
Complete Specification Left, 30th Mar., 1897-Accepted, 29th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in or connected with Pipes or Tubes for Conveying
Water.
We WILLIAM SNELGROVE of Shirley near Birmingham Engineer and RICHARD
FRANCIS GOYNE of 16 Bromsgrove Street Birmingham Merchant do hereby declare
the nature of this invention to be as follows:--
To construct pipe or tube for the conveyance of water in such a manner that not
only shall the said pipe be less liable to split or burst on the freezing of its contents
than the ordinary pattern but also shall be so constructed that its contents shall be less
liable to freeze. Our improved pipe may be described as having two parts an inner
tube for the conveyance of the water and an outer tube or case surrounding the inner
tube and of sufficiently larger diameter to leave an air space between the two tubes
one or more ribs or suitable projections may be formed to keep the said tubes apart or
the outer tube may rest on the apices of the convolutions of the inner tube hereinafter
described. We construct our inner tube of lead or other soft metal and we form it in
such a manner that a cross section of the said pipe has a serpentine or convoluted
configuration and we prefer to arrange the convolutions in such a manner that the
convex portion of one shall be diametrically opposite the concave portion of another.
On the freezing of the water contained in our inner tube the expansion into ice is
absorbed by the convolutions yielding, portions of the latter being forced outwardly
and thereby increasing the capacity of the pipe to the requisite extent to prevent
bursting or splitting.
Surrounding the above described inner tube we form an outer tube or case of a
circular cross section the air space or spaces between the two tubes as before described
serving as a non-conducting covering to the inner tube, and thus prolonging the life of
the latter by reducing the frequency of the freezings of its contents. We may form
our improved pipe by any of the usual methods.
Such as forcing plastic metal through a die the double tube in that case being
formed complete, or as our outer tube may be of much thinner metal than the inner
tube, and not necessarily water-tight, we may if desired fold or lap it around the inner
tube. In one such method we may form our inner tube with a projecting external
longitudinal web or flange of sufficient width to be bent completely around the said
inner tube and thus form the outer case.
Dated this the 14th day of September 1896.
WM. SNELGROVE.
R. FRANK GOYNE.
COMPLETE SPECIFICATION.
Improvements in or connected with Pipes or Tubes for Conveying
Water.
We, WILLIAM SNELGROVE, of Shirley, near Birmingham, Engineer, and RICHARD,
FRANCIS GOYNE, of 16 Bromsgrove Street, in the City of Birmingham, Merchant,
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 consists of improvements relating to pipes or tubes for the conveyance

page_text: of water, our object being to so construct such pipes or tubes that the contained water
shall be less liable to freeze, and in the event of freezing the pipes shall be less liable
to split or burst, than pipes or tubes of ordinary construction."
Our improved pipe may be described as having two parts, an inner tube for the
conveyance of the water, and an outer tube or case surrounding the inner tube and of
sufficiently large diameter to leave an air space between the two tubes.
One or more ribs or suitable projections inay be formed to keep the said tubes apart,
or the other tube may rest on the apices of the convolutions of the inner tube
hereinbefore described."
We construct our inner tube of lead or other soft metal and we form it in such a
manner that a cross section of the said pipe has a serpentine or convoluted configura-
tion, and we prefer to arrange the convolutions in such a manner that the convex
portion of one shall be diametrically opposite the concave portion of another. On the
freezing of the water contained in our inner tube the expansion is absorbed by the
convolutions yielding and being slightly forced outwards, thus increasing the capacity
of the pipe.
The air space between the inner and outer tubes serves as a non-conducting medium
for the protection of the inner tube.
In the accompanying sheet of explanatory drawings to be hereinafter referred to.--
Figures 1 and 2 are sectional elevations representing one method of constructing
our improved pipe.
In the construction of the pipe, preferably by forcing plastic metal through a die,
we form projecting strips of metal as A Figure 1 extending the whole length of the
pipe, and such strips are subsequently bent round to form the complete tube as
illustrated at Figure 2, with spaces as B between the inner and outer portion.
We do not limit ourselves to the particular form of pipe illustrated in the drawings,
but make such modifications both in the form and the method of construction as may
be necessary to meet varying services or requirements.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is.--
1. A pipe or tube for conveying water having an outer and an inner portion
arranged substantially in the manner for the purposes described.
2. The construction of a pipe or tube substantially as described and as illustrated.
Dated this 29th day of March 1897
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicants.