IMPROVE- MENTS IN COMBINED MANHOLE COVERS AND VENTILATORS FOR SEWERS to be as follows:
Year: 1884

page_text: I BENJAMIN CHARLES BADHAM of 10ª Featherstone Buildings in the County of
Middlesex Engineer do hereby declare the nature of said Invention for "IMPROVE-
MENTS IN COMBINED MANHOLE COVERS AND VENTILATORS FOR SEWERS to be as
follows:-
".
This invention consists of certain improvements in combined manhole covers and
ventilators for sewers by which the dirt entering the ventilator may be easily
removed and the sewers may be flushed without removing the manhole cover and
the surfaces of the castings exposed to the surface of the roadway are made much
more durable than heretofore.
I form the manhole cover and ventilator in one casting the ventilator being a
sufficient distance from the manhole cover to enable' ine to form a cavity in the
brickwork (which may be charged with charcoal) to catch any dirt passing through
the ventilator and I form the ventilator cover hinged so that it may be turned up
in order to clear out the dirt collected through the ventilator and also to enable a
hose to be passed through the said opening so as to flush the sewer. I also fit to
the ventilator cover (at the opposite end to the hinge aforesaid,) a double catch
formed of two pivotted arms and weighted so as to keep them extended so that as
the cover is put into position the arms which are hooked at their extremities may
catch under the casting or lugs provided for that purpose so as to prevent the cover
from becoming turned up by accident or otherwise. When it is desired to open the
ventilator cover this may be done by passing a hook down so as to hook up the
weight and allow the catches to release themselves.
I also according to this Invention propose to chill or steel face the upper surface
of the casting which would be exposed to the traffic so as to harden it and thus
make it more durable.

page_text: COMPLETE SPECIFICATION.
Improvements in Combined Manhole Covers and Ventilators
for Sewers.
I BENJAMIN CHARLES BADHAM of 10ª Featherstone Buildings in the County
of Middlesex Engineer do hereby declare the nature of this said 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 consists of certain improvements in combined manhole covers
and ventilators for sewers by which the dirt entering the ventilator may be easily
removed and the sewer may be flushed without removing the manhole plug or top
and the surfaces of the castings exposed to the surface of the roadway are made
much more durable than heretofore.
And in order to explain my said invention more fully I will now proceed to
describe the same with reference to the accompanying sheet of drawing in which
figure 1 shews plan of my improved combined manhole cover and figure 2 is section
through lines A. BCD figure 1. E shews casting in which is inserted wood.
I form the manhole cover and ventilator in one casting E the ventilator F being
a sufficient distance from the manhole cover to enable me to form a cavity or catch
pit in the brickwork (which may be charged with charcoal, or a porous wick
saturated, with disinfectant, can be placed over the inlet orifice) to catch any dirt
passing through the ventilator and I form the ventilator cover hinged so that it
may be turned up in order to clear out the dirt collected through the ventilator and
also to enable a hose to be passed through the said opening so as to flush the sewer.
I also fit to the ventilator cover (at the opposite end to the hinge aforesaid)
a double catch G formed of two pivotted arms and weighted so as to keep them
extended so that as the cover is put into position the arms catch upon the casting
lugs or cone H provided for that purpose so as to prevent the cover from becoming
turned up by accident or otherwise.
When it is desired to open the ventilator cover, this is done by passing a hooked key
down so as to raise the weight, and compel or allow the catches to release themselves.
The ventilating cover is of novel design to prevent accident to bicyclists and
increasing ventilating area. For cross roads I intend using a second ventilator
preferably at right angles but cast in one casting.
I also according to this invention propose to chill or steel face the surface of the
castings so as to harden them and thus make them more durable.
The plug is hollowed out to prevent it sticking from grit.
Having now particularly described and ascertained the nature of my said
invention and in what manner the said is to be performed I declare that what
I claim is
A combined manhole cover and ventilator and flushing box constructed and
arranged substantially as set forth.