Improvements in Apparatus for Supplying Precipitating and Purifying Materials employed in the Treatment of Sewage and other analogous purposes.
Year: 1894

page_text: Date of Application, 9th June, 1894
Complete Specification Left, 9th Mar., 1895-Accepted, 20th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Supplying Precipitating and
Purifying Materials employed in the Treatment of Sewage
and other analogous purposes.
I, JOHN EDWIN KEIRBY, of Worsley Road, Swinton, near Manchester, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to the apparatus described in Letters Patent No. 2729
granted to me on the 14th day of February 1891 and the object of my present
improvements is to enable any of the well known soluble precipitants, including
certain salts which could not be advantageously dealt with in my aforesaid patented
apparatus, to be delivered in solutions of constant predetermined strengths or in
varying strengths determined automatically by, and proportionately to, the quantity
of sewage under treatment.
My improved apparatus consists of an openwork cage or perforated cylinder,
containing the soluble iron salt or other precipitant in bulk, and this cage is
surrounded by an outer cylinder or casing and mounted upon a spindle by pre-
ference supported in bearings in the frame of the outer cylinder or otherwise. The
cage is arranged so that it can be rotated on its axis, and near the bottom of the
outer cylinder is secured a pipe connected to a supply of water required to dissolve
the precipitating material and at another part of the outer cylinder preferably a
little above or at about the same level as the inlet pipe is an outlet pipe to which
is coupled a swivel pipe or hollow arm through which liquid from the cylinders is
discharged; this arm is capable of being raised and lowered by connections from a
float in the culvert, drain, sump, or other convenient place to which the sewage is
admitted or through which it flows.
The cage is rotated by any suitable arrangement of gearing and by its rotation
agitates the precipitating materials therein and so prevents accumulations and
choking of the outlet and also causes a more rapid absorption of the soluble
precipitant.
It will be understood that as the flow of sewage increases and the outlet arm is
thereby raised as the float rises the liquid will rise to a greater height in and so
absorb more of the precipitating material and consequently a stronger solution
will be discharged, and vice versa as the flow of sewage decreases and the outlet
arm falls the level of liquid in the cylinders will be lower and less of the
precipitating material will be dissolved.
In certain cases it may be necessary or advantageous to connect the inlet valve
to the same or another. float to increase or diminish the water supplied to the
cylinder as the quantity of sewage varies.
Dated this 8th day of June 1894.
H. B. BARLOW & GILLETT,
Agents for Applicant.

page_text: Improvements in Apparatus for Supplying Precipitating and
Purifying Materials employed in the Treatment of Sewage
and other analogous purposes.
I, JOHN EDWIN KEIRBY, of Worsley Road, Swinton, near Manchester, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention
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 apparatus described in Letters Patent No. 2729
granted to me ou the 14th day of February 1891 and the object of my present
improvements is to enable any of the well known soluble precipitants, including
certain salts which could not be advantageously dealt with in my aforesaid patented
apparatus, to be delivered in solutions of constant predetermined strengths or in
varying strengths determined automatically by, and proportionately to, the quantity
of sewage under treatment.
And in order that my invention may be fully understood and readily carried into
effect I will describe the accompanying drawing which represents a side elevation
partly in section of my improved apparatus for supplying precipitating and
purifying materials employed in the treatment of sewage and other analogous
purposes.
The improved apparatus as shown consists of an open work cage or perforated
cylinder a which is arranged to be filled from the top with the soluble iron salt or
other precipitant in bulk and this cage is surrounded by an outer cylinder or
casing b; the cage a is mounted upon a spindle or shaft c which is supported in a
bearing d near the bottom of and inside the outer casing 6 and at the top in a
bearing carried by a frame e which supports a cross shaft fon which are mounted
driving pulleys, not shown, and a bevel wheel f¹ which gears into a bevel wheel c¹
secured upon the shaft c by which means the cage is rotated. A pipe 9 provided
with a valve g' is secured to the outer casing near the bottom and this pipe admits
a supply of water to the interior of the casing to dissolve the precipitating
material; at another part of the outer casing and say at about the same level as
the inlet pipe g is attached an outlet pipe or nozzle h to which is coupled a swivel
pipe or hollow arm i through which the liquid from the casing is discharged and
falls into a tank through which the sewage or other liquid to be purified passes
in its course to the culvert, drain or sump.
C
This armi is capable of being raised or lowered automatically by means of a
float placed in the tank j and a rod k secured to the float passes upward through
a bracket secured to the casing b; to this rod is attached at a chain k which
passes over a pulley m carried by the bracket and has a weight n at the other
end to balance the float. To the rod k is also secured by a thunb screw o¹ a small
bracket o and a rod p pivoted to the bracket o supports the swivel arm or outlet
pipe the position of the arm i being controlled by the position of the float x; but
in order to regulate and set the position of the swivel arm i independently of
the float the screw o' can be slackened and the bracket moved and set anywhere
between stops on the rod k. A pointer q may be attached to the rod k and by
suitable graduations made upon the casing bit can readily be seen about what
quantity of liquid per hour or day is passing through the tank j.
It will be evident that the quantity of water which enters the outer casing by
the pipe g will after absorbing a certain quantity of the precipitant pass away
through the swivel outlet pipe i to the tank but as the position of the discharge
mouth of the pipe i depends upon the height of the sewage in the tank j and the
depth of water in the casing 6 depends upon the height of the mouth i, it follows

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that as the flow of sewage increases and the outlet arm i is raised by the float x the
liquid will rise to a greater height in and so absorb more of the precipitating
material and consequently a stronger solution will be discharged on to the sewage
in the tank and vice versa as the flow of sewage decreases and the outlet arm i
falls the level of liquid in the cylinder will be lower and less of the precipitating
material will be dissolved.
The rotation of the cage agitates the precipitating materials therein and so
prevents accumulations and choking of the outlet and also causes a more rapid
absorption of the soluble precipitant.
It frequently happens that at about a regular hour in the day or night the
sewage is extra strong and at such time or times the bracket o could be moved on
the rod k to raise the mouth of the outlet pipe i and so discharge a stronger
solution of the precipitant until the bracket is again lowered to its normal
position.
Any sediment or dirt in the precipitant settles at the bottom of the casing b
below the perforated cage and in order to agitate this sediment vanes or scrapers 7
are attached to the bottom of the cage a so that all can be carried off by the
water through the discharge pipe . In certain conditions where the flow of
sewage is tolerably constant and uniform the float or automatic regulator could be
dispensed with, and the position of the outlet pipe be adjusted by hand when
necessary.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In apparatus employed in the treatment or purification of sewage and other
analogous purposes-
1. The combination with a cage or perforated cylinder containing precipitant in
bulk and surrounded by an outer casing in which said cage is free to be rotated,
of an inlet for the admission of water to dissolve the precipitant and a swivel
outlet pipe for the discharge of the precipitant in solution substantially as herein
set forth.
2. The combination with a rotating cage, an outer casing and an inlet for water,
of a swivel outlet pipe arranged to be raised or lowered automatically according
to the level of the sewage or other liquid in a tank placed below the casing.
3. The general construction combination and arrangement of mechanism
embodying my improvements in apparatus for supplying precipitating and
purifying materials to sewage and the like substantially as herein described and
as illustrated by the accompanying drawing.
Dated this Eighth day of March 1895.
H. B. BARLOW & GILLETT,
Agents for Applicant.