Improvements in Sewer Traps.
Year: 1897

page_text: Date of Application, 30th Sept, 1897-Accepted, 30th Oct.. 1897
COMPLETE SPECIFICATION.
Improvements in Sewer Traps.
We, ALFRED GRAYLING MITCHELL, Salesman, 42 Perry Street, Detroit, Michigan,
U.S.A., and JAMES ALEXANDER BOLGER, Baker, 42 Perry Street, Detroit, Michigan,
U.S.A., 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:-
The said invention consists in improved means for preventing the escape of odors
and offensive, gases from sewers, and is used in connection with sewer traps, the
details of which are illustrated in the accompanying drawings, in which
Figure 1 is a sectional view of a sewer trap designed more particularly for bath-
rooms and other household purposes.
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Figure 2 is a sectional view of a sewer trap designed more particularly for street
purposes.
Figure is a sectional view of a trap designed more particularly for use in the
cellars of houses.
In Figures 1 and 2 of the drawings, A is the outer shell, B the soil or waste
pipe, and C the vent pipe. D represents disinfecting material carried in the
chamber A, and is supported on the grating d. E is a valve pivoted to a ring e
secured to the soil or waste pipe B. The ring e and the valve E are preferably
made of brass. E represents the weighted portion of the valve E, and consists of
a cup shaped rear extension adapted to be filled, or partially filled with lead or
solder. By this construction the force with which the valve is held closed may
be varied by simply adding more or less lead or solder in the cup. F is a pipe
leading to the sewer.
In Figure 2 G is a cap or cover for the trap and may be secured to it in any
suitable manner, as by bolts g,g. The cap is provided with a centre grating or
opening g¹ through which to pass the garbage and sewerage into the waste trap,
and the waste pipe B is provided with openings b at the upper end to permit the
gases that rise through the disinfecting material to pass out into the atmosphere
through the opening. The outer casing may be made of two or more sections as
is found the most convenient in casting.
a in Figure 1 represents the hand-hole to afford ready access to the valve or
the interior of the trap, and is preferably closed by a glass cover, or a cover
provided with a glass portion whereby the valve may be seen from the outside.
G', Figures 1 and 2, are plugs through which the disinfecting material may be
recharged, or the contents added to as required, when it is not desired to remove
the entire cover or outer shell for that purpose.
The outlet from the waste pipe B is preferably cut on an angle to provide for
the more ready passage of the garbage and other sewerage that is thrown upon
the valve. By the use of the inclined valve, the garbage seeks the lower point
and thereby operates with the greatest force to open the valve whereby it is
precipitated into the sewer beneath.
Figure 3 is a form of the device for use in cellars, or drains where the waste

page_text: pipe is horizontal. In this construction, the weight is put either directly on the
back of the valve, or may consist of a cup as in the other constructions. In this
form, as the flooding of the sewer is apt to flood the horizontal pipe, the disinfecting
material should be placed some distance up the vent pipe as shown, to prevent
its being flooded..
The disinfecting material D is preferably charcoal charged with any suitable
disinfecting substance, such as sulphate of iron the object being to destroy the
germs in or the unsanitary properties of such gases as are expected to rise from
the sewer and by discharge through the vent pipes.
The parts being constructed as shown and described the sewerage poured into
the waste pipe B will accumulate on the valve F until the weight is sufficient to
open it, when it will be discharged into the sewer; while the vent pipe will carry
off the offensive gases that may arise from the sewer, made pure and harmless by
the disinfecting material.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
First. A sewer trap consisting of an annular casing, a waste pipe located in said
casing and supported on the top thereof, a disinfecting material surrounding said
waste-pipe and supported within said casing, and a valve, substantially as described.
Second. In a sewer trap, the combination of the casing, a waste pipe located
within the casing and provided with a valve, disinfecting material surrounding
said waste pipe, a top or cover for the said casing and waste pipe having a central
opening to admit sewerage to the waste pipe, said waste pipe provided with per-
forations at the top to permit the gases from the top of the disinfecting material
to pass out of the trap, substantially as described.
Third. A sewer trap consisting of an annular casing, a waste pipe located in
said casing, and disinfecting material surrounding said waste pipe within said
casing, said waste pipe being provided with an inclined discharge valve, sub-
stantially as described.
Fourth. In a sewer trap an inner and an outer shell concentrically arranged,
and a weighted inclined valve adapted to close the lower end of the inner shell or
waste pipe, said valve being pivoted to a ring encircling the inner shell or waste
pine, substantially as described.
Fifth. In a sewer trap, an inner and an outer shell arranged concentrically, and
a weighted inclined valve pivoted to the outside of the inner shell and adapted
to close the lower end of the same, the weighted portion of said valve consisting
of a cup-shaped portion adapted to receive a suitable quantity of lead or other
heavy material substantially as described.
Dated the 30th Jan
.
D. YOUNG & Co.,
11 & 12 Southampton Buildings, London, W.C.,
Agents for the Applicants.