US1515537A - Combined funnel support and receptacle cover - Google Patents

Description

Nov. 11, 1 924. I 5,53 J. c. ASHTON COMBINE ID FUNNEL SUPPORT AND RECEPTACLE COVER Filed Dec. 10, 1923 V was 2% v m Patented Nov. 11, 1924:.

JOHN COOPER ASHTON, OF LONDON, ENGLAND.

COMBINED FUNNEL SUPPORT AND RECEPTAGLE COVER.

Application fi led. December 10, 1923.

To all whom it may concern:

Be it known that I, JoHN Coorne Asnron, a subject of the King of GreatBritain, residing at 2 Caversham Avenue, Palmers Green, N. 13, London, England, have invented certain new and useful Improvements in or Relating to Combined Funnel Supports and Receptacle Covers, of which the following is a specification.

This invention refers to improvements in or relating to laboratory apparatus for fil tering, straining or transferring liquids.

Heretofore it has been the common laboratory practice when filtering or straining liquids to employ a filter stand comprising a base piece for the graduated measure or glass to rest upon and a vertical standard having an adjustable clip for supporting the funnel. This apparatus is not only clumsy and inconvenient in use, but it has the disadvantage that it leaves the top of the glass or receptacle open so that particles of dust or other foreign matter frequently .find their way intothe liquid with detrimental or injurious results, such as in the case of photographic developing liquids. In some cases cotton-wool is used round the funnel with a View toavoiding this disadvantage, with the result that pieces of cotton-wool get into the liquid and are almost as detrimental as dust.

The invention provides an article which is characterised in that it serves as a dustproof cover for a beaker or other receptacle into which the liquid is being filtered, strained or transferred, and at the same time as a support for a filtering funnel or other device through which the liquid passes into said receptacle, and in that it comprises a single disc which is shaped on its underside to accommodate the upper edge of the receptacle and is non-perforate except for the provision of an aperture adapted to receive and fit around the tubular portion of said funnel or other device.

In order that the invention may be clearly understood and more readily carried into effect it is hereinafter described with reference to the accompanying drawings, in which Figure 1 is a sectional side elevation of a cover or attachment constructed in accordance with the invention and shown as applied for holding a filter in place upon a graduated measure glass or beaker;

Serial No. 679,827.

Figure 2 is an inverted plan view of said coier or attachment to an enlarged scale, an

Figure 8 is a sectional elevation of said cover or attachment also to an enlarged. scale.

Conveniently and as shown in the drawings, the improved cover or attachment may comprise'a disc at having a plurality of grooves 22 and ribs 0 out or otherwise formed in or on its underside surface. These grooves and ribs may be circular in the case of a circular vessel, or they may be shaped to conform to the shape of the upper edge and spout thereof, as in the case of a graduated glass or jug d provided with a spout e for pouring purposes. In the construction illustrated grooves and ribs are circular but are interrupted at the part 7 to accommodate the spout e and to allow the air to escape. The outermost of the ribs 0 would, as shown, preferably be deeper than the others, so as to ensure that the inner concentric ribs do not rest upon the table or other support and so pickup dust when the device is not inuse.

Arranged in the center of the cover or attachment is a central hole 9 which is preferably tapered to conform to the taper of the tubular stem portion of the funnel h it is adapted to receive, and also provided with an extension or collar 2' on one or both sides. In some cases this collar 71 may be shortened so as to be within the level of the lower surface of the outermost rib o. The upper portion of the cover or attachment (1 is preferably sloped downwardly towards the outer portions so as to ensure that any split or contaminated liquid will not reach theinterior of the vessel (Z. Preferably the cover or attachment 0. would be formed of moulded. glass, vulcanite or other similar material and according to the number and arrangement of the grooves b and ribs 0, so it can be adapted to fit any desired number of vessels 0'! within the range of those commonly employed. The device will be found to be especially useful in caseswhere volatile liquids are being used.

lVhat I claim is l. A combined cover and filter support, comprising a disc-like element formed on its lower surface with a plurality of means to respectively receive and substantially close the upper edges of beaker-like receptacles,

said disc being centrally formed with an opening adapted to receive and support a filtering funnel.

2. A combined cover and filter support, comprising a disc-like element formed on its lower surface with a plurality of means to respectively receive and substantially close the upper edges of beaker-like receptacles, said disc being centrally formed with an opening adapted to receive and support a filtering funnel, the disc having a marginal flange serving to protect the beaker edge engaging means and formed to cooperate with the pouring lip of the beaker.

3. A combined cover and filter support, comprising a disc-like element formed on its lower surface with a plurality of means to respectively receive and substantially close the upper edges of beakerlike receptacles, said disc being centrally formed with an opening adapted to receive and support a filtering funnel, the upper surface of the disc sloping downwardly in all directions from the funnel receiving opening.

In testimony whereof I have hereunto signed by name.

JOHN COOPER ASHTON.

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