IMPROVEMENTS IN TRAPPING SEWERS AND DRAINS AND IN TRAPS THEREFOR
Year: 1882

page_text: LETTERS PATENT to Walter Alfred Barlow of 6 St Paul's Churchyard in the
"
City of London Patent Agent and Engineer for an Invention of
"IMPROVEMENTS IN TRAPPING SEWERS AND DRAINS AND IN TRAPS THEREFOR
Communicated to him from abroad by Monsieur L Henry of Brussels in
the Kingdom of Belgium
PROVISIONAL SPECIFICATION left by the said Walter Alfred Barlow at
the Office of the Commissioners of Patents on the 4th October 1882.
WALTER ALFRED BARLOW of 6 St Paul's Churchyard in the City of London
Patent Agent and Engineer "IMPROVEMENTS IN TRAPPING SEWERS AND DRAINS
AND IN TRAPS THEREFOR Communicated to me from abroad. by Monsieur L.
Henry of Brussels in the kingdom of Belgium,
This Invention relates to certain improvements in trapping sewers and drains
and in traps therefor and consists of an apparatus destined for use in branch sewers
connecting the houses with the main sewers.
It has for its purpose to allow the matters or liquids entering the main sewers
but prevent them re-entering the branch sewers, when by flood or any other cause
the level in the main sewer rises and cause the matters or liquids to run back
almost into the houses.
"
The said apparatus prevents also the miasmas which come from the sewers
entering the houses when the pressure of gases is strong enough to overcome the
syphons which exist in the apparatus generally in use.
The apparatus is composed of an oblong box open at both ends and connected
with the branch sewers at their exit from the houses.
The end towards the branch sewer is furnished with a balanced lever door said
door resting on the two sides of the box and closes this sewer the weight which
operates this door is outside the case and is screened by a hood forined of a piece
with the case.
The equilibrium of the door is calculated in such a manner that the least
pressure from the interior of the sewer makes it swing. The passage is thus

page_text: open for the matter to pass and the door takes its original position when the
pressure is off.
If the pressure is applied from the exterior that is to say from the branch sewer
collector towards the house the door which only works in the contrary direction is
forced to keep its natural position and thus prevents the passage of the matter back
to the house.
For the same reason the door being hermetically jointed to the exterior edges of
the case the gas cannot penetrato into the branch,sewer.,
+
The case, the weights and the counter-weight are made of cast iron. The apparatus
will be made either in cast iron, or any other metal. The door is mounted on
pivots and bearings of phosplior bronze.
Tho interior aide of the door is provided with planed copper or other metal plate
as well as the exterior side of the case so as to make a close joint..

page_text: .
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SPECIFICATION, in pursuance of the conditions of the Letters Patent filed by
the said, Walter Alfred Barlow in the Great Seal Patent Office on the
4th April 1883.
73
WALTER, ALFRED BARLOW of 6' St. Pauls Church Yard in the City of London
Patent Agent and Engineer "IMPROVEMENTS IN TRAPPING SEWERS AND DRAINS
AND IN TRAPS THEREFOR" A: Communication to me from abroad by Monsieur L
Henry of Brussels in the Kingdom of Belgium
This invention relates to certain improvements in trapping sewers and drains
and in traps therefor and consists of an apparatus destined for use in branch sewers
connecting the houses with the main sewers.
9
It has for its purpose to allow of the matters or liquids entering the main sewers
and to prevent them from reentering the branch sewers, when from flood or any
other cause the level in the main sewer rises and forces the matters or liquids back
almost into the houses;
The said apparatus also prevents the miasmatic gases which arise from the
sewage, from entering into the houses when the pressure of gases is strong enough
to overcome the water seal in the syphons or traps which exist in the apparatus
generally in use.
In the annexed sheet of drawings is shewn the improved apparatus Fig: 1 being
a side view. Fig 2, a front view, Fig: 3 a transverse section through line a b
Fig 2. Fig: 4 a back view, and Fig: 5 is a perspective view.
The apparatus is composed of an oblong open boxing A open at both ends and is.
to be placed at the point of connection between the branch sewers at their exit
from the houses drains and sewers.
The end of the boxing towards the sewer is furnished with a balanced lever
door B said door being hung on trunnions a on opposite sides of the boxing and
serves to close the channel of the drains to the sewers the weight a¹ which counter-
balances this door B is outside the channel through boxing A and is screened by a
hood C formed of a piece with the boxing
The equilibrium of the door is such that upon the slightest pressure being
exerted from the interior of the sewer it swings and the channel or passage opened
for the sewage to pass and the door reassumes its original position when the pressure
is removed.
If the pressure is applied from the outside that is to say from the sewer in
direction of the drain, the door is forced too into its normal and closed position and
thus prevents the passage of the sewage matter back into the house In like
manner the door B, being jointed above and outside the edges e of the casing A, the
gas cannot pass back into the drains
The casing A the weights a¹ and the counterweights are made of cast iron or any
other metal. The door B is mounted upon trunnions a and bearings of phosphor
bronze or other noncorrosive metal.
The inner side of the door is provided with planed copper or other noncorrosive
metal plates d as well as the outer edges e of the boxing A to make a close joint.
The boxing A at the rearward part A', Fig: 3 will (although not shewn) be in
some cases provided with a socket or joint for connection with the drain.
Having now described the nature and particulars of the said invention I
claim
Firstly The automatic trapping of sewers by means of the boxing A with the
channel therethrough provided with the counterbalanced door B a a¹ placed
between the drains and the sewers as and for the purpose herein set forth.

page_text: Secondly The trap for trapping sewers consisting of the boxing A with the
outflow channel therethrough provided with the hinged counterbalanced door
B, a a' with the facings d, e, and phosphor-bronzo trunnions and bearings
constructed and operating as and for the purpose herein set forth and shown by
the drawings.
In witness whereof I the said Walter Alfred Barlow. have hereunto set my
- hand and seal this fourth day of April in the year of our Lord one
thousand eight hundred and eighty three.