AN IMPROVED DAZIRVIN Dozimo TRAING OR SEED AD DRATH GO" METHOD FOR RELIEVING PRIVATE DRAINS OF SEWED OR DEATH GAO3
Year: 1874

page_text: LETTERS PATENT to David Gill, of the Town of Weston-super-Mare,
in the County of Somerset, for the Invention of "AN IMPROVED
DAZIRVIN Dozimo TRAING OR SEED AD DRATH GO"
METHOD FOR RELIEVING PRIVATE DRAINS OF SEWED OR DEATH GAO³
PROVISIONAL SPECIFICATION left by the said David Gill at the
Office of the Commissioners of Patents, with his Petition, on the
18th December 1874.
I, DAVID GILL, of the Town of Weston-super-Mare, in the County of
Somerset, do hereby declare the nature of the said Invention for "AN
IMPROVED METHOD FOR RELIEVING PRIVATE DRAINS OF SEWER OR DRAIN GAS," to
be as follows:
The object of this Invention is to allow sewer or drain gas which
comes from the main sewer to escape into the open air (at a proper
elevation) under much less pressure than is sufficient to force its passage
through the drain eject leading to dwelling houses or other buildings,
and also to allow any effluvia to escape from the private drain leading

page_text: to sewer, which otherwise would be kept back by the trapping of the drain
eject, the principle of the Invention being to place a weaker trap above
the drain eject with a bridge dipping into the water in the proportion of
about two-thirds to one-half of that of the drain eject, thus providing an
easier and safe way for the escape of sewer gas from the main to the
open air, the effluvia from the private drain being allowed to escape to
the main by means of a self-acting valve which allows of escape from
the private drain, but prevents ingress of gas coming from the main, as
the valve remains closed by its own gravity unless acted. upon from
the private side of the drain, as the following description will
explain :-
The Invention, as will be seen by the Drawing annexed, consists of
two compartments A and B, one above the other, secured together by
suitable means, the upper being made removable to get at the drain
eject C. The lower compartment has an opening D (with movable
grating to stop rats) at the bottom into the drain eject, and another
opening E above it (into the upper compartment), and in one of its sides
is a circular opening F, to which is attached an effluvia escape G pipe
from the private drain H. In this opening is a ring rounded in section,
or the edges of the opening may be rounded instead, and inside the
compartment in the front of this opening a wedge-shaped valve I is
placed, with a hollow ball either spherical or spheroidal (made on it),
which falls by its own gravity, and closes up the circular opening, thus
preventing ingress of sewer gas, but by opening with any little pressure
behind it allows the escape of effluvia from the private drain to the
main. This valve has a rounded edge at bottom to rock upon, with pins
and slots to keep it in position, and stops K on the sides of the compart-
ment to prevent its getting beyond its gravity. The upper compartment
consists of a shaft with an opening and cover L on top at one part, and
the other part consisting of a water trap M, whose bridge dips into the
water in the proportion of two-thirds to one-half that of the drain eject,
thus forming the weaker trap for the escape of the sewer gas. At the
upper part of this trap is an opening from which a pipe N is carried up
to a proper elevation against a chimney stack, roof, or other support for
the discharge of the said gas into the open air. This water trap can be
kept filled by any suitable means.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said David Gill in the Great Seal Patent Office on the
15th June 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DAVID
GILL, of Weston-super-Marc, in the County of Somerset, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of December, in the
year of our Lord One thousand eight hundred and seventy-four, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said David Gill, Her special
licence that I, the said David Gill, my executors, administrators, and
assigns, or such others as I, the said David Gill, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "AN IMPROVED
METHOD FOR RELIEVING PRIVATE DRAINS OF SEWER OR DRAIN GAS," upon the
condition (amongst others) that I, the said David Gill, my executors
or administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Scal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said David Gill, do hereby declare the
nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement, reference being had to the annexed Drawing and to
the letters marked thereon, that is to say :-
The object of my said Invention is to allow sewer or drain gas or gases
which is or are generated in or proceeds or proceed from the main sewer
to escape into the external atmosphere at any proper and desired eleva-
tion under much less pressure than is sufficient to force a passage
through the drain ejection pipe leading to dwelling houses or other

page_text: dips into the water in the proportion of two-thirds to one-half that of the
drain ejection pipe, thus forming the weaker trap for the escape of the
sewer gas or gases. At the upper part of the last-mentioned trap is
formed an opening from which a pipe shewn at N is carried up to a
proper elevation against a chimney stack, roof, or other support for the
The said water
discharge of the said gas or gases into the external air.
trap can be kept filled by any suitable means.
Having thus declared and ascertained the nature of the said Inven-
tion, and in what manner the same is to be performed, I would observe
in conclusion that what I consider novel and original and therefore claim
as constituting the Invention secured to me by the said herein-before in
part recited Letters Patent is, the method of relieving private drains of
sewer or drain gas, substantially as herein-before described and set forth.
In witness whereof, I, the said David Gill, have hereunto set my
hand and seal, this Eleventh day of June, in the year of our Lord
One thousand eight hundred and seventy-five.
DAVID GILL. (L.B.)