IMPROVEMENTS IN INSPECTION OR ACCESS PIPES FOR HOUSE DRAINS AND SOIL PIPES
Year: 1884

page_text: I GEORGE CHARLES DAVIES of 65 Lausanne Road, Peckham, S.E. in the County
of Surrey, Clerk of Works, do hereby declare the nature of my Invention for
IMPROVEMENTS IN INSPECTION OR ACCESS PIPES FOR HOUSE DRAINS AND SOIL
PIPES, to be as follows:-
My said Invention has reference to & new or improved construction or
arrangement of inspection or access pipes to be used for the drains, or soil pipes of
houses so as to enable the same to be easily inspected, or cleansed; and also to
avoid the danger and inconvenience often arising from ordinary man-holes, as at
present used for the purpose.
The improvement and novelty of the said inspection or access pipe, consist in
making the cover over inspection aperture air-tight by means of a groove and
tongue joint running round same; this joint being stuffed with india-rubber tubing,
asbestos or other suitable stuffing, and the cover being kept in its place, and
secured to the pipe by metal screws, so as to prevent any escape of gas, or the joint
being broken by heavy flushing of the drains. Also by maintaining the inside
circular form or bore of pipe, so as to avoid any space being left under the cover of
aperture for the lodgment of paper or anything likely to choke the drain. These
pipes may be made of iron, zinc, copper or other suitable material, and to any size
or length required.
And in order that the nature, novelty and mode of performing my said Invention
may be fully understood, I will now proceed to describe the several Figures on the
accompanying Sheet of Drawings which I have hereunto appended for the purpose
of shewing the best means, I am at present aware of, for carrying my said Invention
into effect or practice.
Figures 1, and 1 A, are an elevation and plan of my improved inspection or access
pipe, A, being the movable cover over the inspection aperture. B, metal screws for
securing same to pipe. C, eyes for lifting the cover.
Figure 2, is a longitudinal section of the said pipe shewing the fitting and form
of cover at the ends.
Figure 3, is a transverse section (+ full size) through the centre of pipe shewing
the joint of cover and the method of maintaining the inside form or bore of pipe.
Dated this 1st day of February 1884.

page_text: COMPLETE SPECIFICATION.
I GEORGE CHARLES DAVIES of 65 Lausanne Road Peckham S.E. in the County
of Surrey Clerk of Works do hereby declare the nature of my Invention for
IMPROVEMENTS IN INSPECTION OR ACCESS PIPES FOR HOUSE DRAINS AND SOIL
PIPES and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My said Invention has reference to a new or improved construction or
arrangement of inspection or access pipes to be used for the drain or soil pipes. of
houses, so as to enable the same to be easily inspected or cleansed, and also to avoid
the danger and inconvenience often arising from ordinary means of access or
manholes as at present used for the purpose.
The improvement and novelty of the said inspection or access pipe consists in
making the cover, over inspection aperture gas-tight, by means of a groove and
tongue joint, running round same; this joint being stuffed with india-rubber,
asbestos or such like stuffing; or for ordinary purposes white lead mixed with a
little tallow, or any other suitable mixture will do, the said cover being kept in its
place, and secured to the pipe by screws, so as to prevent any escape of gas, or the
joint being broken by heavy flushing. Also by maintaining the inside circular
form or bore of pipe so as to avoid any space being left under the cover of aperture
for the lodgment of paper or anything likely to choke the drain. The cover over
aperture requires no skilled labour in fixing or unfixing, it only being necessary
when fixing the cover in order to secure a gas-tight joint to notice that the parts
forming the joints are kept clear of dirt and that the groove in the cover is properly
filled with the stuffing material, the cover being then placed in position and
screwed down. These pipes may be made of iron, zinc, copper or other suitable
material, and to any size or length required:
And in order that the nature, novelty and mode of performing my said Invention
may be fully understood, I will now proceed to describe the several Figures on the
accompanying Sheet of Drawings which I have hereunto appendid, for the purpose.
. of showing the best means I am at present aware of for carrying my said Invention
into effect or practice. Figure 1 is a plan of my improved inspection or access
pipe, A, being the movable cover over the inspection aperture. B, B, metal screws
for securing same, to pipe. C, C, eyes (when necessary) for lifting the cover.
Figure 2, is a longitudinal-section of the said pipe, showing the fitting and form of
cover at the ends. Figure 3, is a transverse section (enlarged scale) through the
centre of pipe showing the joint of cover and the method of maintaining the
inside form or bore of pipe.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is :-
(1.) The forming and applying of a groove and tongue joint round the inspection
or access apertures of house drains and soil pipes substantially in the manner
described and illustrated with reference to Figures from 1 to 3 inclusive of the
appended Drawings or any mere modification thereof.
(2.) The maintaining the inside circular form or bore of pipe under the inspection
covers to house drains and soil pipes substantially in the manner described and
shewn in the accompanying Drawings.