Improvements in Earthenware Sanitary Pipes.
Year: 1889

page_text: Date of Application, 27th Aug., 1889
Complete Specification Left, 26th Feb., 1890-Accepted, 29th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Earthenware Sanitary Pipes.
I THOMAS PHILIP BAYLIS 20, Bridge Street, Worcester Engineer and Surveyor,
do hereby declare the nature of this invention to be as follows:-
An improvement in the manufacture of all sizes of Earthenware Sanitary Pipes
by having all pipes made with an invert shoulder at the socket end of pipe, a
sufficient portion of diameter of socket to ensure the spigot end of adjoining pipe
being securely hedded and kept in position to form a perfectly true gradient, the
depth of invert shoulder to be half the depth of socket, this will enable all joints
either clayed or cemmented to be properly and truly made, and a perfect security
against any water draining out of the land into the pipes (see section Drawings No. 1,
the dotted lines round cross section shewing the pipe in position and the letter A
shews the position of invert shoulder. B jointing space).
The pipes as at present made and laid never have a true gradient the spigot end
of pipe always resting on the flange and causing a difference of level of pipes at
every point and the joints at inverts can never be properly clayed or cemmented;
thereby always leaving an open space at inverts; allowing the draining of water out
of the land to get into the pipes.
1000
THOS. PHILIP BAYLIS.
COMPLETE SPECIFICATION.
Improvements in Earthenware Sanitary Pipes.
I THOMAS PHILIP BAYLIS of Park Road Redditch in the County of Worcester
formerly of 20 Bridge Street in the City of Worcester Engineer and Surveyor 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:
The object of this invention is to secure by less expensive means than heretofore
a true line of invert along a succession of earthenware or other pipes in the
construction of sewers, drains or other conduits.
The method hitherto adopted is to lay around the interior of the socket of the
pipe a strand of tarred hemp embedded in clay cement or other jointing material
and afterwards to drive into such socket the spigot of the next pipe. By this
method it is obviously impossible that a true continuous line of invert can he
secured, owing to the yielding nature of the material composing the joint suffering
compression under the weight of the pipe and superincumbent earth.
This improvement consists in forming a projection or shoulder marked A on the
accompanying drawing of any convenient extent (preferably about rd of its
circumference), such that the depth from the interior of the pipe to the top of
such shoulder may be equal to the thickness of the spigot end of the pipe to be
inserted, so that when such spigot rests thereon the invert of the two pipes may be
even.
The depth of the shoulder from the body of the pipe is made such as to allow
sufficient space in the socket to receive the jointing material, which may be of clay,
cement or other substance usually employed.
The front face of such shoulder may be either vertical, curved, or sloping.
The above described arrangement enables the tarred yarn to be dispensed with,
and secures a
more reliable and watertight joint, which in addition is more easily
and anioklu mada

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:
In conjunction with earthenware sanitary or other pipes the construction in the
socket thereof of a projection or shoulder for the purpose of carrying the spigot
of the adjoining pipe and so arranged as to secure a true line of invert along such
pipes and at the same time to admit of the insertion of jointing material substantially
as and for the purpose herein before described.
Dated this Twenty-fourth day of February 1890.
THOS. PHILIP BAYLIS.