Improvements in the Construction of Filters and other Vessels.
Year: 1889

page_text: Date of Application, 11th Apr., 1889
Complete Specification Left, 10th Jan.. 1890-Accepted. 15th Feb. 1890
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Filters and other Vessels.
I, GEORGE CHEAVIN of Wide Bargate Filter Works, Boston in the County of
Lincoln Filter Manufacturer do hereby declare the nature of this Invention to be as
follows:-
This Invention relates to a method of securing plates or diaphragms forming the
partitions and covers of filters and other vessels.
In place of making the edges of the plate or diaphragm of the same thickness all
round as is usual I make them thickest at the ends of one diameter and thinnest at the
ends of the diameter at right angles to the first, the thickness varying between the
two extremes, and I cut a notch at one of the thinnest places.
The seat upon which the plate or diaphragm rests consists of a ring fixed inside
the vessel and above this ring I fix two lugs diametrically opposite to each other.
In putting the plate or diaphragm into place the thinnest part opposite to the notch
is first inserted between the ring and one of the lugs in this position the notch allows
the plate or diaphragm to pass the other lug and drop into place; a partial turn is
then given to the plates or diaphragm until its upper surface by reason of its
increasing thickness comes against the under sides of the lugs and it is then securely
held in place being wedged between the lugs and ring.
More than two lags may be employed but not so advantageously as then more than
one notch would have to be provided, and the lugs need not be diametrically opposite
to each other.
When the partition or diaphragm takes the form of a cone, cylinder or other
orm I provide it with a projecting ring of varying thickness as above described.
Dated 11
GEO. CHEAVIN
COMPLETE SPECIFICATION.
Improvements in the Construction of Filters and other Vessels.
I, GEORGE CHEAVIN of Wide Bargate Filter Works, Boston in the County of
Lincoln, Filter Manufacturer, 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 relates to a method of securing plates or diaphragms forming the
partitions and covers of filters and other vessels.
Figure 1 is a vertical section and Figure 2 a horizontal section of a filter embodying
my invention.
In place of making the edges of the plate or diaphragin a (shewn separately in
elevation at figures 3 and 4) of the same thickness all round as is usual I make them
thickest at the ends of one diameter and thinnest at the ends of the diameter at
right angles to the first, the thickness varying between the two extremes, and I
cut a notch b at one of the thinnest places.
The seat upon which the plate or diaphragm rests consists of a ring c fixed
inside the vessel and above this ring I fix two lugs d d diametrically opposite to
each other.
In putting the plate or diaphragm into place the thinnest part opposite to the
notch is first inserted between the ring c and one of the lugs d. In this position the
notch b allows the plate or diaphragm a to pass the other lug and drop into place;
a partial turn is then given to the plate or diaphragm until its upper surface by

page_text: reason of its increasing thickness comes against the under sides of the lugs and it is
then securely held in place being wedged between the lugs and ring.
More than two lugs may be employed but not so advantageously as then more
than one notch would have to be provided, and the lugs need not be diametrically
opposite to each other.
When the partition or diaphragm takes the form of a cone, cylinder or other form
I provide it with a projecting ring of varying thickness as above described.
Above and
The filtering medium I prefer to employ is my new "idiocathartes" which I
arrange so that it is coarser at the top and bottom than at the middle.
below the filtering medium 1 place discs e e of pure asbestos cloth as shown.
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 :-
:-
1. The method of securing plates or diaphragms forming the partitions and covers
of filters and other vessels substantially as described.
2. Plates or diaphragms for the partitions and covers of filters and other vessels
substantially as described.
Dated this Oth dor of Tann 1800
GEO. CHEAVIN.