Year: 1888

page_text: A communication from abroad by WILLIAM WALLACE, Citizen of the United States'
of the City and County of San Francisco, State of California, Sail Maker.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both in
the County of Lancaster, and 323, High Holborn, in the County of Middlesex, 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:-
--
The invention relates to improvements in sewer gas excluders of which the following
is a specification, reference being had to the accompanying drawing, and the letters
referring thereto.
Figure 1 is a sectional view showing the same, cut vertically through the centre.
Figure 2, a vertically plan view, and
Figures 3 and 4 are views of detached parts.
A represents the outer shell or frame.
B the screw piston and stem sleeve.
C the rubber valve, D the bed flange for the rubber valve.
E the attaching nut.
F the valve seat.
G the sink strainer.
H the sink bottom or floor.
I the sink lining.
J, the opening for water passage.
K, the flanges or lugs for attaching sewer gas excluder, and L, the part of
the piston and stem, which allows the screw sleeve B, to turn without turning the
valve C.
The object of the invention is to secure a perfect excluder of sewer gas, in a portablo
form, so as to be applied to any sink now in use, or to be used in place of another
trap totally excluding the gas from the room.
27
J, the opening for water passage.
K, the flanges or lugs for attaching sewer gas excluder, and I, the part of
he piston and stem, which allows the screw sleeve B, to turn without turning the
alve C.
The object of the invention is to secure a perfect excluder of sewer gas, in a portablo
orin, so as to be applied to any sink now in use, or to be used in place of another
can totally excluding the gas from the room.

page_text: г
The following is the construction of the same :-
The frame or outer shell A. is formed of brass, or other suitable metal, nickel-plated.
The stem B is fitted in the shell A to operate the valve C of suitable vulcanized
rubber, with sufficient elasticity to insure perfect fit and sealing of the sink discharge
pipe. The valve C is taken off or replaced by simply unscrewing the plate nut E,
and replacing the washer already used or defective, by another. It is screwed
fast by screw P, so that the valve C, will strike concentrically over the valve seat F.
The following is the operation of the same:-
Having placed the shell A, so that the valve C, will lie directly above the end of
the sink discharge pipe, it is screwed fast; then by turning the screw up, and raising
the valve C, the water from the sink flows in, freely through the openings in the
straining plate G, in the usual way, and as soon as the water has run out of
the sink, the valve C is screwed tightly down upon the top of the discharge pipe,
which forms the valve seat; it is then impossible for any sewer gas to escape into the
room.
The screw sleeve B, is allowed to turn, without turning the valve C. My
correspondent, does not confine himself to the exact construction shown, as it may be
varied in form, or the valve stem may be either constructed with a solid stem
or having the screw sleeve B, and central bearing L, without changing the principle
of the invention.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what 1 claim is :-
In sewer gas excluders, the new article of manufacture described, composed of the
case A, with attaching lugs K, and openings J, the screw sleeve B, the stem L, the
bed flange C, the valve D, and attaching nut E, constructed and operated substantially
as and for the purposes set forth.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Agents for the Applicant.