Improvements in Sewer-traps.
Year: 1892

page_text: Date of Application, 12th July, 1892-Accepted, 13th Aug., 1892
GUMI LEID MITTUATIO
Improvements in Sewer-traps.
I, ROBERT NEWTON, of No. 16 Codding Street, in the City of Providence, in the
County of Providence, and State of Rhode Island, United States of America,
Machinist, do hereby declare the nature of my 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 has reference to improvements in the class of sewer-traps in which
a water-seal is secured to shut off the flow of sewer-gas, and consists in the peculiar
construction of the trap, as will be more fully set forth hereinafter.
In water-seal sewer-traps it is essential that sufficient water shall, at all times,
be retained in the trap to form a good and sufficient water-seal by which the
sewer-gases are prevented from entering the house. In most of the traps, as here-
tofore constructed, the partial vacuum, formed by the column of water in the
discharge-pipes, caused the water in the trap to be lifted by the atmospheric-
pressure in the supply-pipe, so that, if not all, at least so much of the water in the
trap was discharged that not sufficient water remained to form a practical seal to
prevent the sewer-gas from entering the house.
The object of this invention is to so construct a trap, in which the siphon will be
broken as soon after the first inrush of water to the trap as air may enter the trap,
so that a sufficient quantity of water must, at all times, remain in the trap to secure
a practical and sufficient seal.
Figure 1 is a vertical cross-section through the center of the trap on the
line Y-Y of Figure 2.
Figure 2 is a horizontal cross-section on the line X-X of Figure 1.
In the drawings 3 indicates a chamber having an inlet 4 and an outlet 5
practically on the same level, the lower end of this chamber 3 is closed by a cap 6
soldered thereto, and at the top of the chamber the flanged-ring 7 is soldered to the
inner edges thereof, the flange of this ring 7 is furnished with holes through which
securing-devices, such as bolts, extending through the edges of or fastened to the
plate 8, are passed and secured, thus holding this plate down to close the upper end
of the chamber. Extending from the upper edge of the chamber 3 is a partition 9
which divides the upper portion of the chamber into two unequal parts, the larger
of which being on the outlet side; this partition 9 extends to within a short
distance of the bottom of the chamber. Directly beneath the outlet 5 the wall of
the chamber 3 is bulged outward to form the recess 10, and immediately above this
recess is clamped a frame 11 by means of the screws 12 passing through the band
or plate 13 on the outside of the chamber and through perforations in this wall of
the chamber; this frame 11 is shaped to conform to the cross-sectional shape of
one-half of the chamber and is adapted to support the cross-partition 14 provided
with the depending-lip 15 between which and the partition 9 is left a long narrow
opening 16. The partition 14 may be formed in part with the frame 11, if desired,
but is preferably secured thereto by thumb-screws 17-17, or otherwise.
The operation of the trap is as follows;-
When properly connected and the water from a basin, a tub, or other source, is
allowed to flow through the trap, the trap will be filled with water and, until the
supply diminishes, the water will flow through the trap,-when the supply diminishes,
the weight of the column of water in the discharge-pipe will form a siphon, the
atmosphere will depress the water on the inlet side of the partition 9 and will raise
the water on the outlet side of this partition until the air can pass under the lower
edge of the same partition 9 and pass to the outlet 5 to break the siphon. Owing
to the horizontal partition 14, the air, after passing under the partition 9, is
го. 01

page_text: compelled to pass up along the side of this vertical partition and through the long
narrow opening 16 between the depending-lip 15 and the partition 9 and turning the
corner over the edge of the partition 14 to pass to the outlet.
When the air can first pass under the lower edge of the partition 9, the atmo-
spheric-pressure still acts on the water in the bottom of the trap on the inlet side,
and, consequently, owing to the difference in pressure caused by the siphon, the
water fills the outlet side of the trap until the siphon is broken by the air, at this
time the quantity of water retained in the trap is much greater, owing to the
horizontal. partition 14 and depending-lip 15, than if the outflow of the water was
not so restricted'; the recess 10 is formed in the discharge side of the trap to
further increase its capacity to contain water which, after the siphon is broken,
forms the seal. This extra quantity of water, the water still flowing into the trap,
finds its level as soon as the siphon is broken and forms an ample and sufficient
depth of water to secure a practically perfect seal.
The horizontal-partition 14 also directs the air-currents and prevents the air and
water from forming induced currents by which the siphon is maintained after the
air is passing under the vertical-partition 9 when the horizontal partition is not
used.
In practice, I find that the length of the lower edge of the vertical partition 9
and the length of the opening 16 form important factors and that the area of the
opening 16 should be no less than the area of the outlet 5.
For facilitating the practical use of this trap; the partition 9 may, if desired,
be placed nearer the center of the chamber 3 than is shown in the drawings, and,
in this construction, I provide the inlet side of the trap with a second horizontal
partition similar to that marked 14 and secured to the side of the trap imme-
diately below the inlet, a recess may also be formed in this side of the trap below
the horizontal partition,-when so constructed the sides may be reversed and the
workman may connect either side with the inlet or outlet,-in practice, this is a
very important point, as it prevents the possibility of securing the trap in the
wrong position.
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. In a trap, the' combination with a chamber divided by a vertical partition
extending froin the upper end of the chamber downward to near the bottom and
having inlet and outlet openings near the upper end; of a horizontal-partition
extending from the side of the chamber below the outlet toward the central
vertical partition, as described!
2. A sewer-trap having a chamber divided by a vertical partition into a down-
ward and upward duct or chamber provided at their upper ends with lateral inlet
and outlet openings, and a horizontal partition extending from the side of the
chamber, below the lateral outlet opening, toward the vertical partition so as to
form a long and narrow opening between the vertical and the horizontal partitions,
as'described.
3: In a sewer-trap, the combination with the chamber 3. divided by the
partition 9' into inlet and outlet chambers, the inlet 4, and the outlet' 5, of two
oppositely-extending partitions 14, dividing the inlet and outlet from the chamber 3,
adapted to contract the inlet and outlet and permit the reversal of the trap, as
described.
4. In a sewer-trap, the combination with a chamber divided by a downwardly-
extending partition; and lateral inlets and outlets provided at opposite sides of said
chamber, of a horizontal: deflector removably secured below the outlet and having
a depending lip, as described.
5. A trap consisting of a cylindrical chamber, having inlet and outlet openings
on opposite sides near one end, divided part of its length by a central partition
extending from the top to near the bottom of the chamber and at one end provided

page_text: with a cap and having two partitions extending horizontally from the sides, below
the inlet and outlet openings, towards the central partition so as to form, on each
side of the partition, long narrow openings connecting the inlet and outlet chambers
with the body of the trap, as described.
6. In a sewer-trap the combination with a chamber having an inlet and outlet, a
recess 10 formed below the outlet, and a vertical partition extending from the top
of the chamber nearly to the bottom of the same, of the frame 11 removably
clamped to the side of the chamber below the outlet, and the removable
partition 14, having the depending-lip 15, secured to said frame 11, as and for the
purpose set forth.
Dated this 8th day of June A.D. 1892.
ROBERT NEWTON.
In presence of:-
JOSEPH A. MILLER, JR.
°
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.