Improved Grating or Strainer for Sinks and the like.
Year: 1894

page_text: Date of Application, 19th Apr., 1894
Complete Specification Left, 16th Feb., 1895-Accepted, 16th Mar., 1895
PROVISIONAL SPECIFICATION.
Improved Grating or Strainer for Sinks and the like.
I, CHARLES EBENEZER CHALLIS of No. 30 Navarino Road, Hackney,
London N.E., Machinist do hereby declare the nature of this invention to be as
follows:-
To overcome the inconvenience occasioned by the refuse ordinarily thrown into
sinks &c. flowing with the dirty water over the flat grating generally used on the
waste pipe, and by the suction of the pipe sealing the holes against the further
passage of water; I construct a grating or strainer of domed, conical, pyramidal,
or other shape, with a central peg (or otherwhere placed pegs) to drop into a hole
or holes in the sink grating this secures my strainer against accidental shifting
but admits of its easy removal for cleaning &c.—it may however be fixed to the
ordinary cup or grating if desired.
In use the flow of water merely piles the refuse in a loosely packed wall through
which the water readily percolates..
Improved Grating or Strainer for Sinks and the like.
I, CHARLES EBENEZER CHALLIS of No. 30 Navarino Road Hackney,
London N.E. Machinist 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 :-
In order to prevent the refuse ordinarily thrown into sinks, drains &c. flowing
over the flat grating usually employed and by the suction of the pipe sealing the
grating against the passage of water; I construct a perforated grating or strainer
of domed, conical, pyramidal or other shape, that may be placed over the ordinary
grating. By this device the straining surface is greatly increased and the suction
of the pipe is so far diminished that the refuse, checked by the nearly perpendicular
sides of the strainer, remains in a loosely packed wall through which the water
percolates readily.
Or it may be used over the mouth of intake pipes without any other grating or
it may be made as part of the usual flat grating.
A central or eccentric peg is sometimes provided for inserting in a hole in the
ordinary grating or in the mouth of intake pipe to prevent accidental shifting,
and this may be prolonged for a variable length by a split metal sleeve or wire
prong.
The strainer or grating may be made by pressing wire gauze to the required
shape and turning over the raw edge, or dipping the edge into molten metal, or
binding it; or it may be made in perforated sheet metal, the peg being rivetted
through from the top; or it may be cast complete in one piece. When iron is
used in the construction it may be protected by the deposition of other metal or
metals, or enamelling.

page_text: Or it may be made of earthenware in which case a suitable form is to have a
block of the required external shape, perforated, or surrounded by deeply incised
ribs, the ribbing being continued under the slightly hollowed bottom; a hole may
be made through the top for the insertion of the peg.
Three shapes of strainers are shown in the accompanying drawings; A and B have
central pegs and are shown standing upon the ordinary gratings; C is a square
pattern without the central peg..
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 :
Gratings or strainers for sinks, drains and the like constructed substantially
in the manner set forth and described, and shown in the accompanying drawings.
Dated the 16th day of February 1895.
C. E. CHALLIS.