AN IMproved METHOD FOR NEUTRALIZING THE POISONOUS AND OFFENSIVE NATURE OF SEWER OR DRAIN GAS AND TO DEODORIZE THE SEWAGE
Year: 1875

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
METHOD FOR NEUTRALIZING THE POISONOUS AND OFFENSIVE NATURE OF SEWER
OR DRAIN GAS AND TO DEODORIZE THE SEWAGE."
Scaled the 19th March 1875, and dated the 23rd January 1875.
PROVISIONAL SPECIFICATION left by the said David Gill at the Office
of the Commissioners of Patents, with his Petition, on the 23rd
January 1875.
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 NEUTRALIZING THE POISONOUS AND OPFENSIVE NATURE
OF SEWER OR DRAIN GAS, AND TO DEODORIZE THE SEWAGE," to be as
follows:-
-:
The object of this Invention is to neutralize the poisonous and
offensive nature of sewer or drain gas, and to deodorize the sewage by
means of fumigation applied by a pecular method herein described. The

page_text: .
compound for chlorine gas has been found suitable for this purpose, but
other disinfectants capable of being vapourized or of being resolved into
gaseous forms may be used.
This Invention consists of a certain construction and arrangement of
parts set forth, lettered, and shewn by the accompanying Drawing, and
also its method of application as the following description will explain :-
A is a vessel made of fire-clay or other suitable material; this vessel is
for containing the requisites for generating the desired gas or vapours
for fumigation; B is the heating chamber, also made of fire-clay or other
suitable material; C is an inlet pipe for the admission of air to drive
the fumes from the generating vessel forward into the drain; D is an
exit pipe from the said vessel for conveying the fumes into the drain; E
is the drain; F is a pipe or upshaft placed at the most suitable position
to the drain, carried up to a suitable height; this shaft is to create a
current to draw the fumes down into and through the drain. These
principal parts are indicated by capital letters in the Drawing, and
certain minor parts by small letters, as follows:-a, a, is a deep groove
running round the top of the vessel A, larger than the flange of the
cover; b is the cover with a flange round it as shewn which sinks down
into the groove when put on, the groove is filled with water or other
suitable means for preventing the escape of fumes; c and d are inlet and
exit holes; e, the requisites for producing the fumes; f, f, f, f, are inlet
and exit holes to heating chamber B for air; g is the lamp or gas jets
for heating a vessel A; h is a door for communicating with the lamp
or gas; i is a cap hinged to top of up shaft with a wire or chain and ring
to pull up the cap for the purpose of creating a current as before
mentioned, or to let down when it is desired to retain the fumes in the
drain for a certain time, or this cap may be used to regulate the flow at
will.
This Invention can also be used for flushing the drains with fresh air a
if desired without fumes.
The principle of this Invention is also applicable on a larger scale to
public drainage, and may be extended over large areas by means of
stations.