Improvements in Filtering Machinery.
Year: 1890

page_text: Date of Application, 2nd Dec., 1890
Complete Specification Left, 1st Oct., 1891-Accepted, 7th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Filtering Machinery.
I, EDGAR MARTIN, of Hamper Mills, Watford, Herts, do hereby declare the
nature of this invention to be as follows:-
This invention consists of a hollow cylinder so arranged that it may revolve
upon hollow trunnions or upon a hollow centre shaft & the whole may be contained
in a cistern or tank.
The periphery or body of the cylinder is freely perforated or constructed in a
somewhat similar manner with the exception of a short distance at each end but the
two ends of the said cylinder are solid with the exception of the holes corresponding
with the hollow trunnions or similar holes formed for the purpose of receiving the
hollow shaft.
An endless band of filter cloth or any suitable filtering material is so arranged
that it surrounds and covers the periphery or body of the said cylinder with the
exception of a small portion at or near the top. The said endless band of filter
cloth is of greater length than the circumference of the said cylinder and provision
is made that such additional length is utilized in the following manner that is to
say that having as before described nearly enveloped or surrounded the said
cylinder it does not quite meet at or near the top but is lead off and conducted to a
suitable washing cleansing or purifying apparatus and returns to the periphery of
the said cylinder but necessarily at a short distance from the point whence it
commenced leaving it.
The said cylinder may be always revolving and the said filter cloth travelling so
as to correspond therewith.
Dated this Sroond law of Danambar 180n
EDGAR MARTIN,
Hamper Mills, Watford, Herts.
COMPLETE SPECIFICATION.
Improvements in Filtering Machinery.
1, EDGAR MARTIN of Hamper Mills, Watford, Herts, Paper Maker 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:
This invention consists of an hollow cylinder so arranged that it may revolve
upon hollow trunnions, or upon a hollow centre shaft and the whole may be contained
in a cistern or tank.
The periphery or body of the cylinder is freely perforated or constructed in a
somewhat similar manner with the exception of a short distance at each end but
the two flat ends of the said cylinder are solid with the exception of the holes
corresponding with the hollow trunnions or similar holes formed for the purpose of
receiving the hollow shaft.
An endless band of filter cloth or any suitable filtering material is so arranged
that it surrounds and covers the periphery or body of the said cylinder with the
exception of a small portion at or near the top. The said endless band of filter
cloth is of greater length than the circumference of the said cylinder and provision
is made that such additional length is utilized in the following manner, that is to
say that having as before described nearly enveloped or surrounded the said cylinder
it does not quite meet at or near the top but is led off and conducted to a suitable
washing cleansing or purifying apparatus and returns to the periphery of the said

page_text: leaving it.
the point whence To commenced
The said cylinder may be always revolving and the said filter cloth travelling so
as to correspond therewith.
And in order that my present invention may be easily understood and readily
carried into practice I will proceed to more fully describe the same with reference
to the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a front elevation of a cylinder filter fitted in a cistern.
Fig. 2 is a plan of the same without the filtering material.
Fig. 3 is a longitudinal sectional elevation.
Similar letters denote similar parts in each figure.
a is a cylinder the two ends of which a¹ a¹ are solid but the intervening part or
body a is freely perforated. Or the two ends of the cylinder may be held together
by a series of bars and such bars covered with a perforated material. This perforated
surface forms the support for the filtering medium.
A stuffing box is fitted to each end of the cylinder a which revolves on a hollow
shaft or centre tube b. This may either be a plain tube pierced with a few holes
and closed one end or it may have a branch extending to nearly the bottom of
the cylinder, the centre tube b being closed at any convenient point as shown by
the dotted line. The cylinder and shaft are fitted in a cistern c, one of the ends
of the shaft being secured to the front of the cistern, and the opposite end resting
on a bearing bar c.
An endless band of filtering material d such for instance as filter cloth of the
same width, but of greater length than the circumference surrounds the cylinder a
with the exception of a small portion at the top as shown on Fig. 1. By means of
a roller e the cloth is led on to the cylinder a passes round it until nearing the top,
when the length exceeding the diameter of the cylinder is utilized by passing into
any convenient form of washing apparatus f. Continuing its course through the
washing apparatus the cloth passes over the roller el returning to the cylinder by
the roller e whence it started.
The cylinder is intended to revolve and the filtering material to travel with it.
Gearing may be applied in various ways for this purpose, one form being shown by
a bevel toothed wheel g secured to the end of the cylinder, actuated by the pinion g¹
which is mounted on a shaft passing through a stuffing box and driven by the cone
pulley g¹¹.
༡
The manner in which this filter acts is as follows
The liquid to be filtered is supplied in any convenient manner to the cistern c,
filters through the cloth into the cylinder while both the latter are travelling and
is withdrawn by means of the centre tube b. Whilst thus travelling round with
the cylinder and acting as a filter the cloth becomes more or less coated with
impurity. In order to cleanse it; it is led off to the washing apparatus and returns
to the cylinder clean and again resumes filtering. Filtering and cleaning are thus
always proceeding uninterruptedly or may be intermittent if desired.
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
The general arrangement of a cylinder mounted so that it may revolve having
an endless band of filtering material nearly surrounding it such material being of
greater length than the circumference of the said cylinder, the said extra length
being utilized to facilitate the operation of cleaning substantially in the manner
shown and described in this Specification and the accompanying drawings.
Dated this 28th day of September 1891.
EDGAR MARTIN.