US879870A - Metal-extractor. - Google Patents

Description

No. 879,870. PATENTED FEB. 25, 1908. H. 0. HANSEN.

METAL EXTRAGTOR; APPLICATION FILED MAY 4,1907,

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UNITED STATES PATENT OFFICE.

HANS O. HANSEN, OF NEWTON, MASSACHUSETTS.

METAL-EXTRACTOR Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed May 4. 1907. Serial No. 371844.

dross accumulated on the surface of the molten metal contains a very considerable quantity of valuable metal, a part of which is usually recovered by a refining operation. Appreciating the extent of this loss I have invented an extractor that may be supported on the kettle containing the molten metal and the hot dross applied thereto may be squeezed powerfully, a very large proportion of the metal held in suspension in the dross leaving the latter and entering directly the molten metal.

Figure 1 in perspective shows my novel metal extractor suspended over a melting pot, the extractor being closed Fig. 2 is a to or plan view of the extractor; Fig. 3 a detai showing the extractor open for the reception of dross, the hand levers being broken off to save space on the drawings; Fig. 4 is a top view of the dross receptacle without its cover.

The dotted lines P represent part of a melting pot which will be set as usual that a flame may act on the pot and melt the metal therein. The extractor to be effective for the purpose designed must be so constructed that great pressure may be exerted on the dross. The dross receptacle A is shown as a metallic box having a series of perforations, and a cover C. The box has an ear a and an extension 1). The ear a has a pin that enters an angular portion a of a lever a shown as having a shackle a with which may be connected 3. suspending device or chain d when it is desired to hang the extractor from a ceiling as when the extractor should be of large size and heavy to handle, the lower. end of the chain terminating a little above the level of the kettle, so that when the levers a, b are in the position Fig. 1, the extractor may be so sustained as to be swung freely above the top of the kettle. The extension I) has a stud or pivot 12 on which is hung a link b the opposite end of which is joined by a pin 5 with the short arm I) of the lever b, the levers a The cover 0 is sustained loosely by a coupling device 6, made as a nut having a partially conical protuberance and turned on to the threaded stem of a cover carrier eshown as a rod jointed at c to the lever 11 said carrier being extended through the bottom of the receptacle A, the carrier being bent as shown at 6 to insure the tipping of the cover to one side of the box when the cover is open as shown in Fig. 3, at which time the dross may beso fed into the receptacle, the bent part of the carrier acting on the bottom of the box as the cover is descending, insuring the correct entrance of the cover into the box.

When the extractor is to be used, the levers will be opened as shown in Fig. 3, thus lifting the cover from the receptacle, and the latter will be moved to lace the same over the molten metal in the ettle A, and preferably the receptacle will be dipped into the metal, it thereby being highly heated, and while the cover is raised from the receptacle a person using a hand-operated skimmer may put the dross into the receptacle, and when sufliciently filled the levers will be closed in the position Fig. 1, causing the cover to enter the receptacle and squeeze the dross very hard thus expressing therefrom the metal held in suspension in the dross, the metal running from the dross into the metal pot. When changing the levers from the position shown in Fig. 3 into the position shown in Fig. 1 great force is exerted, as the parts a and b of the levers a, b act as toggles united at I).

In practice by the use of my novel extractor I am enabled to make a very considerable saving in metal and the dross is squeezed so hard as practically to remove therefrom all the really available metal. When the cover is drawn into the receptacle, the latter is substantially at rest with the curved part a of the lever a on the top of the kettle or its setting.

In my invention the dross enters the receptacle while yet resting on the top of the 'molten metal. I am not aware that dross of melting pots has been so fed directly from the top of molten metal into an extractor, the latter being heated by the molten metal and the hot dross squeezed while the extractor is in position over the melting kettle.

The described method of squeezing dross is I believe novel. This invention is not to be limited to the exact shape shown for the and 5 having a common fulcrum in a stud b 1 levers, or the connection between said levers and the receptacle and cover, as these parts might be varied in construction and yet be able to exert poweifulpressure' on the dross in the receptacle and yet not depart from my invention as hereinafter broadly claimed;

Having fully described my invention, What I claim as new and'desire to secure by Letters Patent is v 1. A metal extractor comprising a receptacle and-a cover to enter thesa'me, and two crossing'levers, one pivoted-onthe other between the-endsotsaid levers, one lever being operatively connected" withsaid receptacle and the other with said-cover, the movement ofsaid levers" about their common pivotal point causing the coaction of the cover with said receptacle to express the liquidmetal from'the dross;

2'. metal extractorcomprising areceptacle, a cover to enter said receptacle, two levers, one pivoted on-the other, each lever having an extension at; its inner end, and

means to connect the extension of said levers respectively tosaidreceptacle and said cover.

3. A metal extractor comprising, a metallic receptacle, and a" cover, a cover carrier, a lever on which said cover carrier is sustained, and two hand-operated crossmg;

being operatively jointed to the receptacle and the other tothe lever sustaining the cover carrier.

4. A- metal extractor comprisinga foraminous receptacle having ahole in-its" bottom, a

lever connected therewith, acover carrier tom, anda c'over'mounted on said carrier.

5. A metal extractor com rising a foraminous receptacle having a ho e in its bottom, 3

a lever connected therewith, anoflset cover carrier extended from the under side otf'said receptacle upwardly through the hole in its bottom, and a cover mounted loosely on-said carrier.

6. A metal extractor comprising-i2; foraminous receptacle and a cover" carrier, a cover mounted loosely thereon, a lever pivoted to said receptacle and sustaining said cover carrier, and two 1 hand le'verspivote d one' on the other near their inner ends, the innerj ends of* said leversbeing pivoted tosai d receptacle and the other to one end: of the lever'sustaining the cover carrier, whereby when said-levers-are closedto draw the'cover into the receptacle the inner ends of said hand levers-act as toggles.

7. A metal extractor com rising a forami nous receptacle having a ho e in its bottom;

aconnected lever, a cover carrier extended from the under side of said receptacle up" lwardly through the hole in its bottom, a; I'COVGI, and means for adjusting said cover'on =said cover= carrier.

levers one pivoted'on the other, one lever iname to this specification, in the presene'eof 'two subscribing witnesses.

In testimony whereof, I have signeduny HANS C. HANSEN-. Witnesses :i

GEO. W; GREGORY, BERTHA F. HEUSER;

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