Improvements in or relating to the Soil Pipe Connections of Water Closets.
Year: 1891

page_text: Date of Application, 4th Nov., 1891-Accepted, 19th Dec., 1891
Date of Application, 4th Nov., 1891-Accepted, 19th Dec., 1891
COME LEID DI MCIFICATION..
Improvements in or relating to the Soil Pipe Connections of
Water Closets.
I, THOMAS CRAPPER, of the firm of Thomas Crapper & Company, of Marl
borough Works, Marlborough Road, Chelsea, in the County of Middlesex, Sanitary
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 :-
This invention relates to improvements in or relating to the soil pipe connections
of water closets.
It is intended to be applied to that class of water closet wherein the basin trap
is constructed of earthenware.
In water closets of this class as at present constructed, the outlet pipe (usually
of lead) which leads from the trap of the basin to the soil pipe, is generally
surrounded at one end with an external flange which is bolted to a corresponding
flange surrounding the exterior of the trap, red lead, or other suitable material,
being introduced between the flanges to make a tight joint. This method of
connection by a butt joint is however unsatisfactory, as the joint is liable to expand
and leak, and thereby to permit the escape of sewer gas into the house.
Now according to my invention I entirely avoid all leakage of sewer gas into
the house, from the aforesaid joint, by causing the before mentioned connecting
pipe to pass down the interior of the trap (in lieu of merely abutting against the
end of the same) and to terminate at a point below the level of the water seal in
the trap. Any escape of sewer gas is thus impossible, provided the water in the
trap is at its proper level.
I will now proceed to describe my invention more particularly, having reference
to the accompanying drawing, which represents in sectional elevation a pedestal
closet basin and trap and connecting pipe constructed according to my invention.
a is the basin, and the trap thereof, both being constructed of earthenware in
one piece. c is the connecting pipe which leads from the trap to the soil pipe
situated outside the house. is a flange cast around the pipe c, by means of
which the said pipe is secured to the trap b by bolts which pass through the
flange cand also through the flange b¹ surrounding the outlet of the trap b, in
the ordinary manner. According to the method of connection between the trap
and the pipe e heretofore employed, the latter would terminate at the flange c¹, but
according to my invention I prolong the pipe c and cause it to pass down the
interior of the trap b and to terminate at a point situated below the level of
the water seal therein as shewn. That portion of the trap b traversed by the
pipe c is preferably enlarged in diameter so that the extremity of the pipe c will be
flush with the interior of the trap as shewn. The pipe e should closely fit the
interior of the trap b.
.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, declare that what I
claim is ;-
1. Connecting the earthenware trap of a closet basin with the soil pipe by means
of a pipe which passes down the interior of the said trap and terminates at a point
situated below the level of the water seal in the same substantially as and for the
purpose described.
2. In combination with the earthenware trap of a closet basin, an outlet pipe c
fitting into and passing down the interior of the trap and terminating at a point

page_text: situated below the level of the water seal thereof, substantially as and for the
purpose described.
i
3. The general construction and arrangement of trap b and outlet pipe c
substantially as described and illustrated in the annexed drawings.
Dated this 4th day of November 1891.
A. E. ALEXANDER,
Chartered Patent Agent, 19, Southampton Buildings, London, W.C.,
Agent for the Applicant.