Year: 1887

page_text: Date of Application, 19th July, 1887
Complete Left, 24th Jan., 1888
Complete Accepted, 20th Apr., 1888
I IRWIN CLARKE WALLAS of 219 Belsize Road in the County of Middlesex Sanitary
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to the construction of the heads of Rain Water and other
pipes and is designed to intercept and prevent the passage of obnoxious gases into
dwellings as at the present is frequently the case.
My invention consists essentially in the employment of a trap placed in the open
head of the Rain Water waste or other pipe which will prevent any noxious gases
(arising from the pipe or pipes connected to or with the outlet of the water or other
head) from penetrating into dwellings indirectly or through any pipes having their
discharge over an open head.
In order to carry my invention into effect I provide a trap fitted in or constructed
as part of the open head of the Rain Water or other pipe and which is constructed
preferably as follows. I do not however confine myself to the particular form
of trap.
In the open head I provide an inverted curve of metal projecting from one side and
an overlapped curve of metal projecting from the other side the end of said over-
lapping projection being on a lower level than the end of projecting internal curve
and at such distances apart as to admit of a free exit for all fluid passing into the top
of the head except such a quantity of water as is retained in consequence of the depth
of the inverted curve of metal which is sufficient to form a seal, thus intercepting the
escape of gases arising from the drains or any other causes.
I may provide an opening at the base of the inverted curve of metal to allow of
access being had for cleansing purposes, or in the event of stoppage. Such opening
may be provided with a screw cap or other fastening when not in use.

page_text: I also fit inside this open trapped head at a distance of about three or more inches
from the surface level of trap and resting upon any suitable supports a wire grid of
metal constructed so as to admit of any quantity of fluid or water passing through the
head but effectually preventing the passage of any substance that might tend to block
up the free working of the trapped head.
These trapped heads may be fitted to receive the discharge from Baths, Sinks, Wash
Basins, Urinals, Roofs, Flats, etc.

page_text: COMPLETE SPECIFICATION.
Improvements in the Heads of Rain Water and other Pipes.
I IRWIN CLARKE WALLAS of No. 219, Belsize Road South Hampstead in the
County of Middlesex, Sanitary Engineer do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My invention relates to the construction of the Heads of Rain-water, Waste and
other pipes, and is designed to intercept and prevent the passage of sewer and noxious
gases into dwellings.
My invention consists essentially in the employment of a trap placed in the open
head of the Rain water, waste or other pipe, which will prevent any sewer or noxious
gases arising from the pipe or pipes connected to or with the outlet of the water head
from penetrating into dwellings and buildings either indirectly or through any pipes
having their discharge over an open head.
I provide a trap fitted in as part of the open head of the Rain water or other pipe
and which is constructed as follows and as shewn on the annexed sheet of Drawings.
Fig. 1 is a section of my improved Open Water head.
"
2 is an outline of the same.
In the open head as shewn in Fig. 1 I provide an inverted curve of metal a
projecting from one side, and an overlapped curve of metal b projecting from the other
side the end of the said overlapping projection being on a lower level than the end of
the projecting internal curve, and at such distances apart as to admit of a free exit for
all fluid or water passing into the top of the head except such a quantity as is retained
in consequence of the depth of the inverted curve of nietal which is sufficient to form
a seal, thus intercepting the escape of gases arising from the drains or any other
cause.
I also fit inside this open intercepting trapped water head at a distance of 3 or more
inches from the surface level and resting on suitable supports or hinged, a wire grid
of metal c constructed so as to admit of any quantity of fluid or water passing through
the head, but effectually preventing the passage of any substance that might tend to
block up the free action of the trapped head.
This Intercepting trapped open water head is constructed to receive the discharges
from waste and overflow pipes of Baths, Wash Basins, Sinks, cisterns, urinals &c.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The Intercepting trapped open water head as hereinbefore described and
shewn.

page_text: 2. In the employment of a trap placed in the open Water Head of the rain water,
waste or other pipe that will prevent from its construction any noxious gases from
penetrating into dwellings or buildings either indirectly or through any pipes having
their discharge over an open head.
3. In the employment of a trap forming part of the open head or vessel, having the 5
objects as set forth in above claim.
Dated this Twenty fourth day of January 1000
IRWIN CLARKE WALLAS,
219, Belsize Road, Kilburn, N.W.,
Applicant.