Improvements applicable to the Plugs of the Cleansing Eyes of Intercepting Traps.
Year: 1894

page_text: Date of Application, 23rd Feb., 1894-Accepted, 24th Mar., 1894
COMPLETE SPECIFICATION.
Improvements applicable to the Plugs of the Cleansing Eyes of
Intercepting Traps.
We,
ALBERT NICHOLLS HAWTREY of 42 Oseney Crescent, Kentish Town in
the County of London, Surveyor, and JAMES REEKIE of 39 Brecknock Road,
Camden Town in the County of London, Plumber, 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:—
When a stoppage occurs in an intercepting trap or in the drain between this
trap and the sewer the sewage collects in the inspection chamber. It then becomes
necessary to remove the plug of the cleansing eye of the trap but with the existing
arrangements this plug cannot be got at until the greater part of the accumulated
sewage in the inspection chamber has been pumped out or otherwise removed.
Now the object of our invention is to provide means whereby the plug of the
cleansing eye can be readily withdrawn from the upper part of the inspection
chamber and without first removing any part of the accumulated sewage. For
this purpose we fit the outside of the plug with an eye or other similar contrivance
to which is attached one end of a chain. This chain passes round a sheave or
pulley carried by a bracket or arm in the inspection chamber, the other end of the
chain being attached to a rod the upper end of which extends to nearly the top of
the chamber. Or instead of a sheave or pulley a bell crank may be employed.
When it is required to remove the plug it is only necessary to pull up the rod which
therefore through the intermediation of the chain will withdraw the plug.
The accompanying drawings represent the manner in which we prefer to carry
our invention into effect.
Figure 1 is a central vertical section of the inspection chamber, intercepting trap
and other parts.
Figure 2 is a horizontal section on the line x x of Figure 1.
a a represent the inspection chamber, 6 the manhole cover, c c the step irons,
d the drain from the house to the open channel e at the bottom of the inspection
chamber, the intercepting trap and g the cleansing eye of same, h is the plug of
the cleansing eye made of earthenware or other suitable material. All these parts
are of ordinary construction. is a screw bolt passed through the centre of the
plug and secured inside by a nut k; 1 is an eye or ring on the outer end of the
bolt. m is a chain connected to the eye land carried round a sheave or pulley n.
This sheaven is carried by a bracket or arm p which is built into the brickwork
of the chamber a. The position of the sheave relatively to the plug his such that
the portion of the chain in between the eye and the sheave is in line with the axis
or centre of the plug so that when the chain is pulled it exerts a direct central
pull upon the plug; this is an important feature of the arrangement. The other
end of the chain is connected to the lower end of a vertical rod 9 which passes
through an eye at r in an arms built into the brickwork. The rod q has a bow
handlet which keeps it in position by resting upon the arm s. As already herein.
before stated a bell crank may be employed instead of the sheaven; in this case
the outer end of the chain m would be connected to one arm of the bell crank
whilst the rod q would be connected to the other arm of same either directly or
through the intermediation of a short piece of chain as will be well understood.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim, is :-
The means or apparatus, substantially as herein before described and represented
in the accompanying drawings, whereby the plug of the cleansing eye of an inter-
cepting trap can be withdrawn from the upper part of the inspection chamber.
Dated this 23rd day of February 1894.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.