IMPROVE- MENTS IN THE CONSTRUCTION OF SEWERS AND DRAIN PIPES OR TUBES
Year: 1868

page_text: LETTERS PATENT to Thomas Walker, of Birmingham, in the
County of Warwick, Engineer, for the Invention of "IMPROVE-
MENTS IN THE CONSTRUCTION OF SEWERS AND DRAIN PIPES OR TUBES."
Scaled the 28th July 1868, and dated the 8th February 1868.
PROVISIONAL SPECIFICATION left by the said Thomas Walker at
the Office of the Commissioners of Patents, with his Petition, on
the 8th February 1868.
I, THOMAS WALKER, of Birmingham, in the County of Warwick,
Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF SEWERS AND DRAIN PIPES OR TUBES,'
to be as follows:-
As sewers and drain pipes or tubes are at present arranged the
subsidiary or feeding channels open into them at their upper parts
or above the ordinary level of the sewage water therein, by which the
effluvia from the matters in such sewers or main drain pipes or tubes
rises up the subsidiary or feeding channels into the streets or ways,
and in some cases into the surrounding dwellings with most injurious
results.

page_text: For
The object of these improvements is to remedy these evils.
this purpose I arrange the openings for the subsidiary or feeding
channels into the mains at the bottom thereof, or where the outlets
or mouths of the subsidiary drains into the mains will be covered by
any sewage water in such mains, and the subsidiary or feeding drains
will thereby become self-sealing or self-trapping. I form pipe drains
with these branches on their lower side inclining upwards at an
angle or passing partly round the external surface of the pipe or tubo
to the gully or other inlet.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said Thomas Walker in the Great Seal Patent Office
on the 7th August 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
WALKER, of Birmingham, in the County of Warwick, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth day of February, in the
year of our Lord One thousand eight hundred and sixty-eight, in
the thirty-first year of Her reign, did, for Herself, Her heirs, and
successors, give and grant unto me, the said Thomas Walker, Her
special licence that I, the said Thomas Walker, my executors, adminis-
trators, and assigns, or such others as I, the said Thomas Walker, 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
"IMPROVEMENTS IN THE CONSTRUCTION OF SEWERS AND DRAIN PIPES OR TUBES,"
upon the condition (amongst others) that I, the said Thomas Walker,
my exccutors 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 Seal Patent Office within six calendar months next and im-
mediately after the date of the said Letters Patent.

page_text: NOW KNOW YE, that I, the said Thomas Walker, 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 thereof, that is to say :-
As sewers and drain pipes or tubes are at present arranged the
subsidiary or feeding channels open into them at their upper parts or
above the ordinary level of the sewage water therein by which the
effluvia from the matters in such sewers or main drain pipes or tubes
rises up the subsidiary or feeding channels into the streets or ways,
and in some cases into the surrounding dwellings with most injurious
results.
The object of these improvements is to remedy these evils; for this
purpose I arrange the openings for the subsidiary or feeding channels
into the mains at the bottom thereof, or where the outlets or mouths
of the subsidiary drains into the mains will be covered by any sewage
water in such mains, and the subsidiary or feeding drains will thereby
become self-sealing or self-trapping. I form pipe drains with these
branches on their lower sides inclining upwards at an angle or passing
partly round the external surface of the pipe or tube to the gulley or
other inlet.
But that the Invention may be fully understood I will by the aid
of the accompanying Drawing proceed to describe means pursued by
mo in coming the some into effect

page_text: it according to my Invention. The dotted lines c indicate a passage
from the upper portion of the main drain carried up to some height
above the surrounding buildings for ventilation of the sewer.
Having thus described my Invention, and means which I adopt in
carrying the samo into effect, I would have it understood that I do
not confine myself to the precise arrangement shown and described so
long as the peculiar character of the Invention be retained.
In witness whereof, I, the said Thomas Walker, have hereunto set
my hand and seal this Fifth day of August, in the year of our
Lord One thousand eight hundred and sixty-eight.
រ