Improved Mode of Laying and Testing Sewer Pipes.
Year: 1896

page_text: Date of Application, 14th Jan., 1896
Complete Specification Left, 13th Oct., 1996-Accepted, 12th Dec., 1896
PROVISIONAL SPECIFICATION.
Improved Mode of Laying and Testing Sewer Pipes.
CHARLES LEONARD JACKSON WHITE Civil Engineer 14 Castlewood Avenue
Rathmines Dublin do hereby declare the nature of this invention to be as
follows:-
My invention consists of two parts, first the machine or implement which is used
to ensure the drain pipes being laid with a true invert line, and second the
implement used for testing whether the interior joints have cement intruding.
The first portion of my invention "the expanding core" is shown on Sheet 1,
and consists of two semi cylindrical pieces of wood D and D' covered with felt,
cloth or Indian rubber and capable of being expanded by mechanical means, such
as a wedge or wedges, screw or screws, spring or springs, or pneumatic means, so
as to fill the bore of pipes while the joint is being made and also prevent the
cement intruding through the interior joint.
The drawing on Sheet 1. shows the "expanding core" D. D¹ expanded by means
of a movable wedge, provided with guide pieces e. e', and two iron stops b. 1
against which the two semi-cylindrical pieces D D¹ rest, when the machine is.
placed inside the pipes before expanding (this is shown by the dotted lines.
thus.
on the side elevation of expanding core Sheet 1.
The stop C is so fixed that when the block D touches it the core exactly fills:
the pipe, the blocks D and D' are covered with cloth or felt nailed round as shown
on "perspective" "end view" and "section at A" Sheet 1.
I hold that the essence and principle of my invention, consists in the introduction
inside the pipes as they are being laid and jointed of a rigid core which will ensure
their being truly in line and prevent cement getting into the interior of the line-
of pipes.
The second portion of my invention consists of passing through lines of drain
pipes when laid and jointed, a cylinder of wood or light metal of a slightly less.
diameter than the pipe, to ascertain if the joints inside the pipes are free from.
intruding cement and the pipes truly laid.
These blocks are shown on Sheet 2, Figure 1 solid block, Figure 2 hollow block
(suitable for large pipes) and Figure 3, block made in sections, so that it can be.
taken asunder, in order to pass curved channels in manholes.
19
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C. L. JACKSON WHITE..
CHARLES LEONARD JACKSON WHITE Civil Engineer 140 Strand London W.C.
late of 14 Castlewood Avenue Rathinines Dublin do hereby declare the nature
of this invention and in what manner the same is to be performed, to he
particularly described and ascertained in and by the following statement :-
My invention consists of two parts, first the machine or implement which is used

page_text: to ensure the drain pipes being laid with a true invert line, and second the
implement used for testing whether the interior joints have cement intruding.
now refer to my drawings that I lodged with the Provisional Specification.
The first portion of my invention "the expanding core" is shown on Sheet 1
and consists of two semi-cylindrical pieces of wood D and D' covered with felt,
cloth or Indian rubber and capable of being expanded by mechanical means, such
as a wedge or wedges, spring or springs or pneumatic means, so as to fill the bore
of pipes while the joint is being made and also prevent the cement intruding
through the interior joint.
The drawing on Sheet 1 shows the "expanding core" D D' expanded by means
of a movable wedge, provided with guide pieces e el and two iron stops b, bi against
which the two semi-cylindrical pieces D D¹ rest, when the machine is placed inside
the pipes before expanding, (this is shown by the dotted lines thus ---) on
the side elevation of expanding core Sheet 1.
The stop C is so fixed that when the block D touches it the core exactly fills the
pipe, the blocks D and D' are covered with cloth, felt, or Indian rubber nailed
round as shown on "perspective" "end view" and "section at A" Sheet 1.
The second portion of my invention consists of passing through lines of drain
pipes when laid and jointed a cylinder of wood or light metal of a slightly less
diameter than the pipe, to ascertain if the joints inside the pipes are free from
intruding cement, and the pipes truly laid.
These blocks are shown on Sheet 2, Figure 1-solid block, Figure 2 hollow
block (suitable for large pipes) and Figure 3, block made in sections, so that it can
be taken asunder, in order to pass curved channels in manholes.
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 :-
That the essence and principle of my invention consists in the introduction inside
the pipes as they are being laid and jointed of a rigid core, which will ensure their
being truly in line and prevent cement getting into the interior of the line of pipes,
and the after test of the passing of a cylinder of wood to prove the above
conditions.
Dated this 12th day of October 1896