Improvements in or relating to the Means of Trapping Drains or Sewers so as to Prevent any Return of Tidal or other Back Waters.
Year: 1886

page_text: Date of Application, 31st Dec., 1886.
Complete Left, 28th July, 1887.
Complete Accepted, 30th Aug., 1887.
PROVISIONAL SPECIFICATION.
Improvements in or relating to the Means of Trapping Drains or
Sewers so as to Prevent any Return of Tidal or other Back
Waters.
I PIERRE FELIX RICHARDS H.M. Office of Works 12 Whitehall Place S.W.
Civil Engineer do hereby declare the nature of this invention to be as follows:-
A trap of iron or any other suitable material in the form hereafter mentioned,
having on the intake side of trap a copper or other floating ball supported on a curved
dip forming the water seal, there being a clear water-way round the curved dip. On
the tide or other waters rising on the outgo side of the trap the water in the trap rises
and so floats the ball and blocks it against the intake of the trap, the intake of the
trap being provided with a suitable packing ring of asbestos or other suitable material.
The ball having no fixing or guides whatever, is free to rotate, rise or fall with the
back water so rendering it free from any chance of sticking. On the falling of the
level of the tidal or other waters the ball falls until it reaches the curved dip before
mentioned. The curved dip is provided with a hole at the bottom to allow the escape
of any passing solids.
Dated this 30th dox of Donamber 1886

page_text: COMPLETE SPECIFICATION.
Improvements in or relating to the Means of Trapping Drains or
Sewers so as to Prevent any Return of Tidal or other Back
Waters.
I PIERRE FELIX RICHARDS (late of) H.M. Office of Works 12 Whitehall Place S. W.
now 1 Adam Street Adelphi W.C. Civil Engineer 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 :-
A trap of iron or any other suitable material of the form as shown by the accom-
panying sectional elevation and hereafter mentioned viz. having a floating A of copper
or other suitable material, supported on a curved dip B which dip forms the trap and
at the bottom of which there is a hole B¹ thro which any obstructions may escape, the
dip having also a clear water-way below it thro which the water entering the trap
at G and Howing into the trap can pass to the outgo at H.
On the tide or other waters rising and flowing back thro the outgo H and
continuing to rise the ball A is caused to float and so jam against a packing ring of
suitable material at D thereby stopping effectually the opening and preventing any
water to pass thro to the intake side G of the trap, the ball having no guides is free
to rotate and rise or fall with the variations in the level of the waters and on the
receding of the tide or other flood waters the ball A falls again into the dip B.
The trap in formation has an inspection cap C for periodically ascertaining that the
ball is in working order and at E an eye is provided which can either be used for
inspection or ventilation purposes. The eye at F (dotted) may also be used, if
required, for ventilation on the intake side G.
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
A trap to prevent the return thro the trap of tidal or other flood waters.
Dalh
J... t .... 1097