Year: 1896

page_text: Date of Application, 23rd July, 1896
Complete Specification Left, 9th Apr., 1897-Accepted, 29th May, 1897
WILLIAM WARNER Hope Drive The Park Nottingham Civil Engineer do
hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide a better means of mixing sewage sludge
with lime, ready for forcing into filter presses.
When sewage sludge is filtered in filter presses it is necessary to add lime and
the mixers usually employed are constructed with a centre spindle having horizontal
blades attached and it has been found difficult to get the lime and sludge thoroughly
mixed.
My invention cousists in having two vertical spindles with blades forming the
lower part of the spindles; they are curved similar to the mixing blade of an egg
wisk, and overlap each other in the sphere of action in order to give a thorough
nixing to the material.
The gearing consists of bevil wheels driven by an horizontal shaft with pullies
and the usual belt gear.
The mixer may be employed to mix lime or other chemicals with sewage before
entering precipitation tanks.
Dad hind dow of Tul. 1896
WILLIAM WARNER.
WILLIAM WARNER Hope Drive The Park Nottingham Civil 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:-
The object of this invention is to provide a better means of mixing sewage sludge
with lime ready for forcing into filter presses.
When sewage sludge is filtered in filter presses it is necessary to add lime and the
mixers usually employed are constructed with a centre spindle having horizontal
blades attached and it has been found difficult to get the lime and sludge thoroughly
mixed. My invention consists in having two vertical spindles with blades forming
the lower parts of the spindles; they are curved similar to the mixing blade of an
egg whisk and overlap each other in the sphere of action in order to give a thorough
mixing to the material.
The gearing consists of bevel wheels driven by a horizontal shaft with pullies
and the usual belt gear.
The mixer may be employed to mix lime or other chemicals with sewage before
entering precipitation tanks.

page_text: DESCRIPTION OF DRAWINGS.
Figure 1 represents an elevation of the mixer in section.
Figure 2 represents the mixer in plan.
The vertical spindles for supporting the blades are shewn by letter a supported
in a bearing bush s and the lower part of the spindle has a block t secured to the
spindle by a key or cotter. On two sides it has provision for bolting the mixing
blades at u.
The vertical spindles are driven by bevel gearing through wheels cef by
means of horizontal shaft g having a loose pulley Z and a fast pulley k. The
pulley being fast to the shaft will make the shaft g revolve & convey the motion
through the wheels to the spindles a and the mixing blades h. The bottom part of
the blades is supported in a toe step and toe spindle j. The horizontal shaft is
supported upon a cover of the mixer and revolves in bearings formed in the
brackets n.
The casing forming mixing vessel is shown at m. The inlet for sludge is at pand
the outlet at o. Over the outlet there is a valve with handwheel g. The lime is
put in through cover r.
In working my improved mixer, sludge is let into the mixing vessel through the
pipe p and while it is running in, a given quantity of lime is put into the mixer
through the manhole r. By this means I have the exact quantity of lime to the
exact quantity of sludge and as the blades are revolving a thorough mixing is
taking place as the material is fed into the machine.
The machine is kept working until one of the sludge receivers for forcing into
the filter presses is ready to receive its contents.
Then the outlet valve is opened by the handwheel q and the entire charge from
the mixing vessel of lime and sludge is passed into the sludge forcing ram, then the
valve is closed and another supply of sludge is taken in through pipe p and lime
through cover r to be in readiness for the next charge.
It will thus be seen that I am able to get at the exact quantity of lime used and
a thorough mixing which will save the cost in pressing sewage sludge.
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
A mixer substantially as described and illustrated and for the purposes set forth.
WILLIAM WARNER.