An Improved Method of and Means for Purifying the Waste or Impure Matters from Tanneries, Factories, Dyeworks, or similar or other Sources.
Year: 1889

page_text: Date of Application, 26th Nov., 1889
Complete Specification Left, 26th Aug., 1890-Accepted. 4th Oct., 1890
PROVISIONAL SPECIFICATION.
An Improved Method of and Means for Purifying the Waste or
Impure Matters from Tanneries, Factories, Dyeworks, or similar
or other Sources.
We, JOHN WALKER CALVERT, of 12 Rider Road Woodhouse, Leeds, in the
County of York, Salesman, and JAMES CHAFFER of 11 Cypress Street, Woodhouse,
Lerds, in the said County, Extractor, do hereby declare the nature of this invention.
to be as follows:-
Our invention relates to an improved method of and means for purifying the waste
or impure matters from tanneries, factories, dyeworks or similar or other sources and
consists in precipitating such impure matters by means of the admixture therewith of.
brown oil of vitriol otherwise known as sulphuric acid, then by filtration through a
filter bed composed of broken brick, broken stone and sawdust in suitable proportions,
this causes the water contained in such impure matters to pass off in a comparatively
clear and bright state and to leave the residue or sediment upon the said filter bed in
a suitable state for easy removal therefrom.
Dated this 20th day of Annil 1800
JOHN WALKER CALVERT.
JAMES CHAFFER.
COMPLETE SPECIFICATION.
An Improved Method of and Means for Purifying the Waste or
Impure Matters from Tanneries, Factories, Dyeworks, or simlar
or other Sources.
We, JOHN WALKER CALVERT, of 12 Rider Road, Woodhouse, Leeds, in the
County of York, Salesman, and JAMES CHAFFER of 11 Cypress Street, Woodhouse,
Leeds, in the said County, Extractor, do hereby declare the nature of our said
invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
Our invention relates to an improved method of and means for purifying the waste
or impure matters from tanneries, factories, dyeworks or similar or other sources and
consists in the treatment or precipitation of the crude matters remaining after
ordinary precipitation of waste or impure matters above referred to and as hereinafter
described reference being had to the accompanying drawings, Fig. 1 being a sectional
elevation and Fig. 2. a plan of the apparatus or means we employ in carrying out our
invention.
a, is a conduit or channel by which the sewage or impure matter as it leaves a
tannery, factory, dyeworks or other source of its production is conducted firstly to a
settling tank such as b, through valves or
"clows" c. After remaining in the said
tank b, a short time the densest portion of its impurities gravitate to the bottom, this
is afterwards removed by any convenient means, to be used as manure.
The remaining matter or liquid portion is next run into the precipitating tank or
tanks d, through valves or clows e, f.
It will be understood that this still impure liquid portion contains a certain amount
of crude matter which is here precipitated by any ordinary or well known means, the
water resulting therefrom being run off by means of pipes g, provided with suitable
mouth pieces g1. These pipes are capable of partial rotation about an axis h, by
means of winches and chains i, j, or their equivalent in order that the said mouth-
pieces may at all times dip below the surface of the water to run off the same.
k, k, are outlet pipes in connection with the pipes g.

page_text: To the crude matter or residue in the tank or tanks d, the separation of which from
the water holding it in solution and at the same time to leave the water comparatively
pure being the object of our invention we add thereto brown oil of vitriol (sulphuric
acid) in such quantity that on agitating the said crude matter and the acid the said
mass is caused to become sufficiently liquified that it is next passed through valves
and pipes 1, on to our improved filter bed or beds m, composed of a layer of broken
brick, n, a layer of broken stone or pebbles o, and a layer of sawdust p, the water
contained in this partially liquified mass passes through the filtering bed m, drain m³,
and the pipe q, in a comparatively clear and bright state and fit to be turned into a
river or other stream without polluting the same, while the solid portion thereof is
left upon the sawdust of the filter bed in such a portable state as to permit of easy
removal therefrom.
Filter beds constructed in the manner above described will last for years without
renewal.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is
1. The method of purification of waste or impure matters from tanneries, factories,
dyeworks or similar or other sources by precipitation of the crude matter contained
therein, by the admixture of brown oil of vitriol commonly known as sulphuric acid
substantially as hereinabove set forth.
2. In the purification of crude matter contained in the waste or impure matters
from tanneries, factories, dyeworks or similar or other sources, the use of a filter bed
such as m, constructed, arranged and operating substantially as hereinabove described
and illustrated.
DOLL
1000
Witness,
THOS. E. CRAVEN, Fel. Inst. P.A.,
24, Victoria Chambers, Leeds.
JOHN WALKER CALVERT.
JAMES CHAFFER,