An Improved Floor and Manhole Chamber for Drains.
Year: 1892

page_text: COMPLETE SPECIFICATION.
An Improved Floor and Manhole Chamber for Drains.
I, RICHARD HENRY BORDER of 5 Alleyn Terrace, Park Road, West Dulwich
London, Ironmonger, 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 refers to the chambers of brick or concrete usually attached to
the drains of private houses, for the purpose of affording access to the intercepting
traps which are inserted in the drain between the house and the main sewer.
These chambers are usually put together piecemeal, and the floor or bottom
being of an intricate shape and having to bear the weight of the walls of the
chamber, often takes several days to construct.
My invention consists in providing a ready-made floor or bottom-piece of glazed
brick or stoneware, or other suitable material, and erecting thereon a chamber or
manhole formed of vertical glazed drain pipes or of similar sectional parts, or of
ordinary brickwork or concrete.
Instead of stoneware I can form my prepared floor of cast-iron, slate, real or
artificial stone, concrete or other suitable substances, or of a combination of two or
more of such substances.
My bottom-piece will be prepared in one or more main pieces ready for fixing,
and with stop and lip pieces for speedy completion, so that when the ground is
excavated it can be at once laid in position, cemented to the drain pipes and the
chamber erected above it.
My improved bottom piece can be made round, square, oblong, or of any preferred
section. By preference I make it either round or oblong.
It forms a complete foundation for the manhole and is furnished with a through
channel for the main drain, and with or without side channels for any additional
drains. These channels have faucets or recessed apertures on their exterior
surfaces to receive the spigot ends of the drain pipes. The upper edge of my
bottom-piece can be flanged or socketed or otherwise fitted to receive the brick-
work vertical pipes or sectional pieces to be laid upon it.
I will now describe the invention with reference to the accompanying drawings
in which
Fig. 1 shows a plan of one of my bottom-pieces or manhole floors x of oblong
shape.
Fig. 2 shows a plan of a round bottom-piece a, of similar character.
Fig. 3 shows an elevation of a round manhole complete, the upper part being
formed of the ordinary drain pipes b, c, p.
Fig. 4 shows a similar elevation taken from the reverse side of the stack, with
a hole cut in b, to receive a Kenon trap.
Fig. 5 shows the lip-pieces d, e, and the inverted arch or support f, which are
used to form the connection.
It will be seen that my bottom-piece is adapted for receiving ordinary drain
pipes at each end, as well as for connection to the ventilating intercepting traps
such as that known as the "Kenon." The opening 9, is specially adapted to admit
the latter. By this means I enable the chamber to be erected in a few hours and
in a superior manner.
The loose lip-pieces d, e, are supplied to connect the channel when desired with
the usual drain pipe.
I also provide stop-pieces to close with the aid of cement any channels not
required, and I supply sloping step-pieces of glazed stoneware or other suitable
material, to fill up any unfilled corners, and these as well as the fixed inside

page_text: of the bottom-piece are all sloped so as to allow all water that may enter the
chamber to pass away down the drain.
When only the centre channel h, is required, I can form a glazed stoneware
bottom with two sloping pieces or slabs, one on either side of the channel and
place one of the vertical pipes b, around it.
The upper portion of the oblong chamber x can be formed like the round
chamber a shewn in Fig. 3, of rings or vertical sections of large rectangular pipe,
or may be built of concrete or brickwork.
The round bottom-piece a shewn in Fig. 2 is especially constructed for supporting
short lengths of thirty inch or thirty six inch diameter ordinary glazed drain
pipes, which can be speedily piled vertically over it to the required height, and
the joints cemented to exclude water.
An open
The aperture, is left for ventilation in case a slab is used as a cover.
grating can be placed over the top if preferred.
The upper section c, as will be seen, is contracted so as to reduce the size of
the top of the chamber.
The holes k, are intended to receive dowell pins.
The channels, and m, are formed to receive additional drains, and if not needed
are closed by cylindrical blocks or stop-pieces as before stated.
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 :-
11
1. In a manhole chamber for drains the prepared floor or bottom-piece x or a,
with or without the loose support-piece f, lip-pieces d, e, and with or without a
brick or concrete chamber, as herein described and set forth.
2. In a manhole chamber for drains the combination of the prepared floor or
bottom-piece a, with vertical pipes or rings of any suitable material, as herein
described and set forth.
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Patent Agent.