CLEANSING STREAMS OF WATER AND TREATING THE DEPOSIT
Year: 1873

page_text: COMPLETE SPECIFICATION filed by Charles Pengilly at the Office of
the Commissioners of Patents, with his Petition and Declaration,
on the 15th February 1873, pursuant to the 9th Section of the
Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
PENGILLY, of Pontsmill, near Saint Blazey, in the County of Cornwall,
Mine Agent, send greeting.
WHEREAS I am in possession of an Invention for "CLEANSING STREAMS
OF WATER AND TREATING THE DEPOSIT," and have petitioned Her Majesty
to grant unto me, my executors, administrators, and assigns, Her
Royal Letters Patent for the same, and have made solemn Declaration
that I am the first and true Inventor thereof.
NOW KNOW YE, that I, the said Charles Pengilly, do hereby declare
that the following Complete Specification, under. my hand and seal,
fully describes and ascertains the nature of the said Invention, and .

page_text: statement :-
I employ a series of apparatuses proportioned in number to the size of
the stream of water to be cleansed. These are made of wood bolted together
with iron bolts, except the water contain copper or other mineral in
solution which would affect the iron, then I use copper bolts. For con-
venience each apparatus should be made in sections of about fifteen feet
in length. The most polluted stream will not require more than four to
each apparatus, and these may be connected either longitudinally or
transversely as the situation is best adapted; but I prefer them longi-
tudinally, as in a series of them they are easier cleansed, and the deposit
is properly classified. Each section should not be less than four feet wide,
and from one to four feet deep, if but a fall of one foot can be obtained,
but they are the most efficient at from three to four feet deep. Each
section should have from six to eight divisions (except the last section),
the first division commencing at the top of the apparatus and extending
about six inches below the level of the water, the next commencing at
the bottom and extending to within about six inches of the surface of
the water, and so on alternately between the divisions. Commencing from
the bottom are laid false bottoms inclining rapidly towards the centre
of the division, leaving but two inches clear of the original bottom.
Transversely on either side opposite this space in the original bottom
must be made a hole about two inches in diameter for the discharge of
the deposit. The inclination of the false bottom concentrates the deposit
into the centre of each division, and with a small iron scraper enables it
to be cleansed while in work. In caso it is desired to make it self-cleansing
it is only necessary to incline the false bottom longitudinally and trans-
versely towards the discharge hole, regulating the discharge hole in size
in proportion to the deposit. The last section of each apparatus must have
from one to three upward filters, according to the purity of the water
required. These should be each of about three times the capacity or area
of the other divisions. These filters are supported with finely perforated
sheets of copper, zinc, or galvanized iron, and loaded with sand of three
degrees of fineness, and about six inches in depth, with a perforated plate
secured firmly on the top of the sand. The discharge from each filter
must be about four inches fall into the next. The whole of the sections
whether connected longitudinally or transversely must be laid perfectly

page_text: level, the ends of each being made to correspond with the divisions which
commence at the bottom and extend to within six inches of the surface
of the water. The filters must commence at a division which commences
from the top of the apparatus, and the division next to the com-
mencement of the first filter which commences at the bottom must rise
two inches higher than the other divisions, so as to destroy all current
over any of the other divisions.
In witness whereof, I, the said Charles Pengilly, have hereunto
set my hand and seal, this Thirteenth day of February, One
thousand eight hundred and seventy-three.
CHA³. PENGILLY. (L.S.)