An Improved Appliance to be used in Laying Sewer, Drain, and like Pipes, also for Testing the same.
Year: 1892

page_text: Date of Application, 22nd Feb., 1892
Complete Specification Left, 19th Nov., 1892-Accepted, 31st Dec., 1892
PROVISIONAL SPECIFICATION.
An Improved Appliance to be used in Laying Sewer, Drain, and
like Pipes, also for Testing the same.
I, DAVID GEORGE ANDREW, of Manor Road, East Molesey, in the County of
Surrey, Architect and Builder, do hereby declare the nature of this invention
to be as follows:-
This invention relates to the construction of an expanding appliance adapted to
be placed in the interior of drain and other pipes when laying the same so as to
hold them in position while the joint is being run; it is also adapted to be placed
in sewer, drain and other pipes in order to stop or dam the same in any required
point in searching for leaks or otherwise.
My improved appliance consists of an india-rubber ring adapted to be expanded
by means of a frame having a number of jointed arms mounted on a central rod in
such a manner that, when the appliance placed in position, by turning a screw
the said jointed arms are moved outwards so as to expand the ring and press it
against the interior peripheries of the pipe where they butt, thereby covering the
joint while the cement is being run round the exterior of the pipes.
It will be obvious that a number of these expanding appliances can be fixed on
one rod.
Where the appliance is to be used for stopping or damming a pipe one end or
side of the ring is covered in by any suitable flexible waterproof fabric.
Dated the 22nd day of February 1892
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Appliance to be used in Laying Sewer, Drain, and
like Pipes, also for Testing the same.
I, DAVID GEORGE ANDREW, of Manor Road, East Molesey, in the County of
Surrey, Architect and Builder, 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 relates to the construction of an expanding appliance adapted to
be placed in the interior of drain and other pipes when laying the same so as to
hold them in position while the joint is being run; it is also adapted to be placed
in sewer,
drain and other pipes in order to stop or dam the same at any required
point in searching for leaks or for other purposes.
My improved appliance consists of an india-rubber ring adapted to be expanded
by means of a frame having a number of jointed arms mounted on a central rod in
such a manner that, when the appliance is placed in position, by turning a screw
the said jointed arms are moved outwards so as to expand the ring and press it
against the interior peripheries of the pipe where they butt, thereby covering the
joint while the cement is being run round the exterior of the pipes.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is a longitudinal section of my device represented in position in a pipe;
and,
Figure 2 is a similar view representing the parts in a different position:
Figure 3 is a section on the line xx, Figure 1.

page_text: a, a indicate drain pipes which are to be jointed, for instance in the manner
described in the Specification of my Application of even date with this Application
No. 3465, by running cement into a metal mould placed around the joint between
the two pipes. bis the india-rubber band which is to be pressed tightly against
the joint within the pipes to hold the same in alignment and to prevent any of the
cement used for making the joint from running into the interior of the said pipes.
c, c are compressing pieces forming a kind of frame arranged within the band b
and adapted to be forcibly pressed against the same in order to press the band into
close contact with the interior of the pipes. These compressing pieces are each
connected by two arms d, d¹ to two bushes or sleeves e, e¹ upon a rod f. The bush e
which is connected to the arms d, d is free to slide on the rod f whilst the
bush to which the arms d', d' are connected is fixed to the said rod by means
of a pin g. h is a tube sliding upon the rod fand connected by a link i with a
second tube h¹.
In a lug or projection; in the end of the rod fis mounted a screw k held against
longitudinal movement in the said lug, and in a lugupon the tube is a screw-
threaded opening with which the screw k engages. It will be obvious that if the
screw is rotated so as to draw the lugs j, towards each other the bush e¹ will
be moved towards the bush e and the end of the tube will press against the
bush e to move it towards the bush e', that is to say, when the screw k is rotated in
the proper direction the two bushes will be moved towards each other, the
arms d, acting as toggles to press the compressing pieces c, c outwardly and
to expand the ring b against the interior of the pipes a, a as shewn in Figure 1,
and that when the screw is rotated in the reverse direction the reverse action
will take place, the ring 6 being allowed to contract away from the pipes, as shewn
in Figure 2.
It will be obvious that two or more of my expanding appliances may be arranged
upon a single rod f, all of them being expanded or contracted simultaneously by
the rotation of the screw k.
of
I sometimes use my appliance for stopping or damming a pipe for the purpose
testing the same and in this case one end or side of the ring is covered in by any
suitable flexible or waterproof fabric.
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 :-
1. An appliance for use in laying sewer, drain and like pipes and for testing the
same comprising an india-rubber ring, a series of compressing pieces arranged
within the said ring and adapted to be compressed against the inner side of the
said ring by means of toggle-arms operated by means of a rod and a tube capable
of sliding one upon the other, substantially as described.
2. The improved appliance for use in laying sewer, drain and like pipes and for
testing the same substantially as hereinbefore described and illustrated in the
accompanying drawing.
Dated the 10th day of Nawanshan 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.