An Improved Automatic Filter.
Year: 1889

page_text: Date of Application, 4th June, 1889
Complete Specification Left, 26th Sept., 1889-Accepted, 26th Oct., 1889
PROVISIONAL DE MOTION
An Improved Automatic Filter.
I, JAMES LESLIE of No. 2 Somerset Terrace University Street Belfast in the
County of Antrim Chemist and Distiller do hereby declare the nature of this inven-
tion to be as follows:-
This Filter consists of an upright vessel, constructed of copper, earthenware, wood
or other suitable material, and accurately fitted with an air-tight cover properly
secured to withstand pressure, to which is attached a cage projecting downwards into
the body of the filter. Over this cage a bag or covering is securely fastened, which
is to be coated on the outside or under part with Pulp, Charcoal or other filtering
medium.
The liquid is admitted at the bottom of the filter by a cock connected to the
supply; and, passing upwards through a perforated plate and the coated bag, is
discharged by a pipe from the top of the filter.
JAMES LESLIE.
COMPLETE SPECIFICATION.
An Improved Automatic Filter.
I, JAMES LESLIE, of No. 2 Somerset Terrace, University Street, Belfast, in the
county of Antrim, Chemist and Distiller do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
Reference being also to the accompanying explanatory sheet of drawings in which
Figure 1 represents the improved filter-according to my Invention--in operation,
Figure 2 a vertical section of same, and Figure 3 an elevation of the cover and
cage or frame hereinafter referred to.
The improved filter in accordance with my Invention consists of a vertically
disposed separating vessel A constructed of iron, copper, earthenware, wood or other
suitable material, the supply of liquid thereto being governed by the cock or valve E
and drawn off by way of the cock or valve G. An air tight cover B fits accurately
over the mouth of the vessel A and is secured in position to withstand internal
pressure by any convenient means. A cage or frame C, which may be of metal,
metal wire, perforated metal, earthenware, wood or other suitable material, is attached
either to the upper portion of the filter A or to the cover B, from which it is
suspended within the interior of said filter or separator. Surrounding this suspended
cage or frame C and securely fastened thereto 1 provide an enveloping bag or
covering D which I prefer to coat or treat exteriorally, with a suitable filtration
medium such as pulp, charcoal, or the like.
When in action the operation of the apparatus is as follows, that is to say:-Upon
the passage of the liquid being opened, it enters the lower portion of the vessel A by
the inlet cock or valve E, and, ascending by the back pressure from the source
supply, passes through the perforations of the plate F, it then penetrates the straining
bag or covering D, which envelopes the cage or frame C aforesaid, until the level
thereof reaches the upper portion of the vessel, from whence it may ultimately be
drawn off at will by means of the cock or valve G provided for the purpose.

page_text: 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 :-
First: The improved automatic filter substantially as herein described and
shown.
Second-The combination with the filter, separator, or vessel A provided with
inlet and outlet cocks E, G, cover B and perforated plate F, of a cage or frame C
provided with an enveloping covering of suitable filtration material substantially as
and for the purpose specified.
Dated this Ninth day of Santambar 1880.
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C., Agent for Applicant.