Improved Manholes, Inspection Chambers, and System of Drainage.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improved Manholes, Inspection Chambers, and System of Drainage.
JOHN KNIGHT, 24, Gertrude Street, Kings Road, Chelsea, S.W., Plumber and
Sanitary Specialist, do hereby declare the nature of this invention to be as
follows:-
-
This invention contemplates certain new and useful improvements in the
system of house drainage by constructing a double disconnecting chamber.
The upper or gulley chamber.separately sealed by a cover from the lower or
soil pipe chamber. The improvements in this double chamber will be obvious
to all who have a knowledge in house drainage by the removal of objectionable
surface gulleys and the placing of same in a separate ventilated chamber.
Also the substitution of preferably artificial stone slabs in place of the ordinary
brickwork; in the construction of manholes, each part being fitted, jointed and
numbered to receive the adjoining portion thus it will be clear that the cost will
be much less and can be laid at greater speed.
Improved Manholes, Inspection Chambers, and System of Drainage.
JOIN KNIGHT, 24, Gertrude Street, Kings Road, Chelsea, S.W., Plumber and
Sanitary Specialist, 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:-
Chambers constructed preferably of artificial stone enamelled eathenware or fire
clay slabs or other suitable material jointed as shewn on plan for use as manholes
inspection and disconnecting chambers for drainage, side entrances and lamp holes
to sewers, and chambers generally.
It is also claimed as an improvement in drainage by the removal of all surface
gullies and the placing of gullies in a double chamber.
This invention contemplates certain new and useful improvements in the
system of house drainage and the substitution of artificial stone in the construc-
tion of manholes and inspection chambers, each part being fitted, jointed, and
numbered to receive the adjoining portions.

page_text: That my invention may be more clearly understood I append drawings in
which
Fig. 1 shews plan of double chamber..
Fig. 2 shews section on Fig. 1.
Fig. 3 shews section on 22 Fig. 1.
Fig. 4 shews section of rain water gulley.
Fig. 5 shews section of another gulley.
Fig. 6 shews section of trapless silt receiver.
Figs. 7 & 7 shews section of chambers.
Fig. 8 shews section of manholes as constructed in artificial stone.
Figs. 8 & 8 shews detail of step iron.
Fig. 9 is plan of manhole bottom.
Figs. 94, 9, 9, 9, 9 shews elevations of bottom slabs.
Fig. 10 is plan of domed roof of manhole.
Fig. 11 shews section of footings for slabs.
Fig. 12 is a modified form of manhole Fig. 1.
Fig. 13 is a plan of bottom of same.
Fig. 14 is a plan of manhole top.
Fig. 15 shews section of another modified form of Fig. 1.
Fig. 16 shews plan of top of same.
REFERRING TO FIG. 1.
A shews the top floor with surface covering and manhole cover removed.
B shews the manhole cover of top floor partly broken.
C shews plan of lower floor.
D is a channel pipe shewn in detail Figs. 7 and 7, d shows section of channels.
1 12 are branch channels joining D.
E shows gulley as detail Fig. 5 which is for the reception of bath, sink, and
lavatory wastes.
e is the cleansing eye to outlet.
el shows inlet pipe to gulley.
F shews rain water gulley, as shewn in detail Fig. 4 and is designed to receive
all rain and surface water with guard dip using only intermediate trapless silt
receivers on the rain and surface water drain and dispensing with the ordinary
rain water gullies.
G is a trapless silt receiver as shewn in detail Fig. 6.
g is inlet pipe.
gis outlet pipe.
H shews fresh air inlet pipe to top or upper chamber.
1. Surface.
REFERRING TO FIGS. 2 AND 3.
J. Surface manhole cover.
K. Corbelled course being made preferably in one piece in artificial stone.
k shews walls constructed of slabs.
L. Footings to slabs composed preferably of artificial stone.
1. Angle corner and tie to which slabs are fixed by any suitable joint.
M shews gulley chamber separately sealed by cover B from the lower or soil
pipe chamber N the improvement in this double chamber will be obvious to all
who have a knowledge in house drainage by the removal of objectionable
gullies from the surface and placing same in a separate ventilated chamber cut
off from the soil pipe chamber № by a sealed cover, thus affording perfect
security against evaporation of the exposed gulley.
N is anti syphon and ventilating pipe.
Fig. 8 is a modified form of Fig. 2, suitable for deep drainage O is the manhole
with dome roof shewn in detail as Fig. 10 & the dome is made referably in 3
pieces, thus dispensing with the necessity of centres and all brickwork being easily
placed in position at much less cost.

page_text: o being sockets for same.
% slabs to walls preferably in artificial stone.
L. Footings to slabs shewn in large; detail Fig. 11 being used in place of
brickwork, laid in one course it is clear that the cost will be much less and can
be laid at greater speed.
P shews the ordinary concrete benching and foundations:
Fig. 9 is plan of bottom.
D & D are channels.
9, 93, 9, 9º and 9 shews slabs in which space R is left for entrance of pipes
to manholes the slabs being in one piece already shaped, can be easily placed in
position thus doing, away with the ordinary methods of cutting and fitting
brickwork.
r being benching lines.
Figs. 12 and 15 are modified forms of Figs. 1.
Figs. 14 and 16 plans of surface and cover to same.
Fig. 13. plan of bottom Fig. 1.
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. A double sealed ventilated double chamber.
2. Placing of gullies in a sealed & ventilated chamber.
3. Substitution preferably of artificial stone, in the construction.
4. All portions being fitted and numbered to facilitate the fitting of the
different parts.
Dated this 7th day of October 1898.