Filter Manufacturer.
Year: 1889

page_text: A communication from PAUL VARIN, of Bar-le-Duc, in the Republic of France, Filter
Manufacturer.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E. 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 filter forming the subject of the present application consists essentially of a
series of juxtaposed plates the dimensions of which may be varied according to the
quantity of liquid it is desired to filter in a given time. The metal of which these
plates consist varies with the nature of the liquid to be filtered such liquids for example
as wines, beers, alcohols; they will be generally of tinned or nickeled copper, tinned
or nickeled iron, tin, nickel, aluminium bronze or the like.
In the accompanying drawings
Fig. 1 represents a side elevation of the filter.
Fig. 2 represents a front elevation of the same.
Fig. 3 and 4 represent the plates two of which form a single element.
Fig. 5 represents a sheet of filtering paper.
Fig. 6 represents a horizontal section drawn to a larger scale of part of the filter on
line -y of figure 1.
The plates forming the elements are slotted as indicated in figs. 3 and 4 and have
each a vertical slot a or a¹ and a series of horizontal or inclined slots or b¹. The
vertical slot of one plate is on the left and of the next plate on the right side as
indicated in figs. 3 and 4 and the length of the horizontal slots of one plate is such
that they just cover the vertical slots of the adjacent plates. In this manner chambers
for the non-filtered liquid and chambers for the filtered or clear liquid are formed.
The dimensions of the slots depend on the nature of the liquid to be filtered and
whether the liquid is to be filtered under more or less pressure. Every two plates
form a double element and the number of double elements in a filter depends on the
quantity of the liquid it is desired to filter in a given time. Between every two
plates is placed a sheet of filtering paper or its equivalent formed with two vertical
slots fg, fg, as indicated in fig. 5 which slots correspond with the vertical slots of
the plates ed and e¹ d'. The liquid to be filtered is introduced into one of the
chambers, on the right for instance and fills all the horizontal slots of that chamber
but cannot enter the horizontal slots of the other chamber or the chamber for the
clear or filtered liquid without first passing through the filtering medium. From
the clear chamber the filtered liquid is drawn off by means of valves or the like.
The indicator glasses on the top of the stationary platen A permit of the state of the
filtering process being observed. Should one of the interposed filtering papers break
the liquid in the indicating glass of the clear chamber will become troubled or not
clear so that the operator can observe it at once.
The plates e-d, e-d' of the filter are pressed together to such an extent that the
whole is watertight. The manner in which this pressure is obtained will bo described
hereafter. The air which is contained in the chambers before the liquid enters them
is driven out by the pressure of the liquid itself and especially liquids containing
carbonic acid gas such as beer and sparkling wines for instance inust be filtered
without coming into contact with air. To this end the filter is provided with two
trunnions T T¹ mounted in suitable bearings which permit of the filter being tilted to
the right or left, the air passing from the horizontal slots 66' to the vertical slots
and from thence to the above named indicator glasses which are provided with suitable
valves.

page_text: The filter plates are pressed together by the following mechanism; The plates are
placed between the stationary platen A and the movable platen A¹ which latter moves
on four guide bars g. These guide bars connect the stationary platen A with the
stationary cross head C formed with an internal screw thread through which passes
the central screw C provided at its outer end with a hand wheel V for operating the
said screw.
The inner end of the screw C¹ bears on a movable cross head C which is
provided with preferably 4, 6 8 or 10 screws v¹ indicated in dotted lines in fig. 1.
These screws bear on the movable platen A¹. The central screw (" is sufficiently
long to permit any desired number of plates to be placed between the platens A A.
By means of the central screw C₁ the first pressure is given to the plates and
this pressure is then increased by turning the screws v¹ by means of a spanner or
the like.
The stationary platen A is at the bottom provided with two cocks or valves, one for
the inlet of the unfiltered liquid and one for the outlet of the clear or filtered liquid.
These valves are in communication with the chambers of the filter by means of
channels o o¹ formed in the platen A on the top of these channels on the platen are
mounted the indicator glasses.
The whole of the filter is mounted on preferably a three-wheel carriage provided
with two uprights or standards m m' in which the trunnions of the filter are
journalled. The filter is supported so that the least effort suffices to tilt it to either
side.
In the body of the carriage is a reservoir or trough preferably of zinc or sheet iron
for the reception of the drainings when the filter is opened to change the paper or for
any other cause. By introducing clean water through the outlet and letting it filter
into the chamber for the unfiltered liquid and thus reversing the current the plates
and the filtering papers are cleaned.
The filter herein described differs entirely from those constructed up to the present
time in the general construction and the manner of pressing the plates together, these
plates forming chambers, one for the unfiltered liquid and one for the clear or filtered
liquid and these plates can according to the metal of which they consist be made as
thin as one millimetre.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, as communicated to me by my
foreign correspondent I declare that what I claim is ;-
1. The filter substantially as herein described and illustrated in the accompanying
drawings.
2. The herein described filtering arrangements substantially as described and
illustrated in the accompanying drawings.
Dated this 18th day of June 1889.
DANT A
W. F. THOMPSON & BOULT,
Agents.