An Improved Apparatus for Damming up Drains and Sewers.
Year: 1892

page_text: Date of Application, 26th May, 1892
Complete Specification Left, 27th Feb., 1893-Accepted, 26th May, 1893
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Damming up Drains and Sewers.
I WALTER JOSEPH BOSLEY of the Sewage Works Tolworth near Surbiton in
the County of Surrey, Resident Engineer and Manager, do hereby declare the
nature of this invention to be as follows:-
-:
This invention is designed to supply an effective flushing or stop block.
It is often desirable to shut water back in sewers, to raise a head of water in the
manholes for the purpose of flushing and cleansing the sewer, or, to shut water
back when sewers burst, in such cases it is often difficult to shut water off with
safety where no provisions are previously made.
Now my invention relates to a simple and economical method, the block consists
of a cylinder, cast or otherwise, having a groove in the centre of the periphery, in
this groove is fitted an expansion ring of india-rubber or other pliable substitute,
completing a tight joint between sewer pipe and block; at one end of the periphery
are three lugs or flanges, to prevent the block from being unduly compressed into the
sewer pipe by the pressure of water against it; on these lugs or flanges, are fitted
a drop, slide, or other lid, having a planed surface, adjusted true with the surface
of the block, thus securing a tight joint.
My expansion block can be made of various sizes, and to work automatically
when so required.
hh ... SM 1900
WALTER JOSEPH BOSLEY.
COMPLETE SPECIFICATION.
An Improved Apparatus for Damming up Drains and Sewers.
WALTER JOSEPH BOSLEY Sewage Works Tolworth near Surbiton Surrey
Resident Engineer and Manager 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 is designed to supply an effective flushing or stop block.
Now my invention relates to a simple and economical method, the block consists
of a cylinder, cast or otherwise, having a groove in the centre of the periphery,
in this groove is fitted an expansion ring of india-rubber, or other pliable substitute,
completing a tight joint between sewer pipe and block; at one end of the periphery
are three lugs, or flanges, to prevent the block from being unduly compressed into
the sewer pipe by the pressure of water against it; on these lugs or Hanges, are
fitted a drop, slide, or other lid, having a planed surface, adjusted true with the
surface of the block, thus securing a tight joint.
In the accompanying drawings
:-
Fig. 1 shows an elevation of the block with lid closed, and the dotted lines shows
the lid being opened.
Fio 2 shows the back of the same fixed in sewer pine with lid closed.

page_text: PP
invention.
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preferred, without departing from the principle of the
My improved apparatus can be made of various sizes and to work automatically
when so required.
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 :-
:-
I. The method of completing a joint between sewer or drain pipes by means of
an india-rubber or other pliable ring fixed in a groove on cylinder, A, as herein
described and set forth.
II. The use of lugs or flanges to prevent undue strain by the pressure of water
against it, as herein described and illustrated by the accompanying drawings.
Dated this 25th day of February 1893.
WALTER JOSEPH BOSLEY.