IMPROVEMENTS IN FILTERS
Year: 1882

page_text: LETTERS PATENT to Jasper Wetter, of New Wandsworth, Surrey for an
Invention of IMPROVEMENTS IN FILTERS A communication to him from .
abroad by Jott Grant, of Boston, State of Massachusetts, United States of
America
COMPLETE SPECIFICATION filed by the said Jasper Wetter at the Office
of the Commissioners of Patents on the 13th November 1882.
JASPER WETTER, of New Wandsworth, Surrey, IMPROVEMENTS IN FILTERS
communicated to me from abroad by Jott Grant, of Boston, State of Massachusetts,
United States of America.
This invention relates to filters, and is shown embodied in that class of filters
that consists essentially of a spherical case provided at its upper end with a screw-
nozzle connecting with the bib of a water pipe; and at its lower end with a
delivery pipe and enclosing a globular shell containing some filtering material,
as charcoal, for instance, and provided with passages on opposite sides by which
the water enters and leaves the said shell, passing through the filtering material
in its passage. This shell being mounted upon an axle provided with a handle
so that it may be readily reversed, thus presenting the opposite side of the filtering
material to the inflowing current, so that at each reversal of the case containing
the filtering material, it will cause the same to be thoroughly washed.
The invention consists in the employment of a gasket of flexible material such
as leather or rubber, having a portion shaped as a zone to fit upon the surface of
the shell, and an annular flange extended outward from one edge of the said zone,
and adapted to be inserted between the two portions of the case when fastened
together in the usual manner by screw threads thereon. And in some minor details
which will be best understood by reference to the specification and drawing.
Fig 1 is a vertical section of the filter, the reversible case being shown n
the position for filtering. Fig 2 is also a vertical section having a reversible
case so turned as to allow the water to flow freely through it without filtering.
Fig 3 is a perspective view showing the gasket which is used to prevent the
water from passing round the filtering case, instead of passing directly through it,

page_text: The spherical shell A is provided with openings B B¹ diametrically opposite one
another, for the inlet and outlet of the fluid to be filtered; and a tubular passage C
shown in cross section in Fig 1 ; and in longitudinal section in Fig 2, passing
through the said shell to permit a free flow of the fluid without filtering when
desired.
This shell is of well known construction, being inclosed in a case formed of two
portions D D adapted to be screwed or otherwise fastened together, as shown at E.
This case is provided at one side with a socket F to receive a pivot G, formed on
the shell A, and at its opposite side with a quill bearing H, through which a
stem I is inserted and connected with the shell A at its inner end; while at its
outer end it is provided with a handle J, to enable an operator to rotate it, and
with it, the connected shell A, in order to reverse the positions of the openings
B B'. By turning the handle a quarter turn, the passage C is brought in line
with the inlet and outlet passages K K' of the case D D¹ so as to allow a free
passage of water, when desired.
In order to prevent leakage between the shell A and the case, I employ a
flexible gasket M shaped as a zone to fit upon the outer surface of the said shell. A
and provided at its lower edge with a flange M' to be placed between the two
portions D D¹ of the case, it serving to hold the zone part M in place, and also
as a gasket to make the joint between the said two portions, water tight,
The fluid in entering the inlet K of the case D D₁ passes down above the outer
surface of the zone-shaped-portion-of-the-gasket-M,-between the said gasket and
the upper portion D' of the case, preferably made-to-leave a space S..between it
and the gasket. The fluid thus pressing in the upper surface of the gasket M
brings it into closer contact with the shell A, insuring an absolutely tight joint
therewith; while upon the outer surface of the said gasket the passage of the
fluid around the shell to the lower portion of the case, is cut off by the flange M'-
and the joint between it and the portion D'of the case, securely-pressed-theroon.—
"
CLAIMS:
1. In a filter, a movable spherical shell or ball and case therefor, combined with
a washer consisting of a zone of flexible material adapted to fit upon the outside
of the said shell, and securely held at its edge, substantially as described.
2. In a filter, a movable spherical shell and a spherical case therefor, made in
two portions, adapted to be fastened together, combined with a gasket consisting
of a flexible zone-shaped portion to fit upon the surface of the said shell, and a
flange portion to be securely held between the two portions of the caso when
fastened together, substantially as and for the purpose described.
3. The gasket M as shown, composed of the zone-shaped portion and its
outwardly projecting flange M¹ constructed and arranged to operate substantially
as and for the purpose described.
In witness whereof I the said Jasper Wetter have hereunto set my hand
and seal this 13th day of November A.D. 1882.