US1670585A - Container for granular depolarizers and process of making the same - Google Patents

Description

May 22,1928. 2 1,670,585

G. A. LYON ET AL CONTAINER FOB GRANULAR'DEPOLARIZERS AND PROCESS OF MAKING THE SAME Filed Jan. 5, 1923 a gnvcnfo io:

' the like- Patented May 22, 1928.

UNITED STATES PATENT oFricE.

GODFREY A. LYONgOF MIAMI, FLORIDA, AND RAYMOND W. ERWIN, OF FLUSHING, AND GEORGE W. HEISE, OF BAYSIDE, NEW YORK. ASSIGNORS, BY MESNE ASSIGN- MENTS, TO NATIONAL CARBON COMPANY, IN 0., OF NEW YORK,

TION OF NEW YORK.

N. Y., A CORPORA- CONTAINER FOR GRAN'ULAB DEPOLABIZEBS AND PROCESS OF MAKING THE Application filed January 5, 1923. Serial No. 610,844.

This invention relates to improvements in galvanic cells having a granular depolarizing composition retained within aperfo rated container. The principal object of the invention is to provide convenient and effective means for preventirnq the granular composition from sifting out of the container during handling and storage prior to placing the cell in operation.- In the preferred .form of the present method, this object is attained by coating or lining the container with a sheet material adapted to be disintegrated by the electrolyte used in the cell.

The invention will be described in connection with the accompanying drawing, in which y Fig. 1 is a vertical central section through a galvanic cell provided with a'lined receptacle for the depolarizing composition;

Fig. 2 is a perspective View of a papercoated metal blank; and

Figx 3 is a perspective view of a container having a removable wrapper.

Referring to Fig. 1, reference numeral 1 denotes a perforated container suspended by rod 2 from cover 3 and immersed in electrolyte 4. The invention is particularly applicable to copper oxid cells, and the structure illustrated is a commercial formof a cell of that type. vided and the container 1 is filled with granular copper oxid 6.

The container 1 is lined with a suitable material 7, preferably paper. The" lining is applied to the container either as an adherent layer or; by insertion of a paper bag or The copper oxid is then filled into the container. By proceeding in this manner the objectionable sifting of the granular material through the container perforations, during handling and storage, is prevented.

The. container, "lining and depolarizer may be assembled in any suitable way. 'For example, a bag may be fitted into the containerand the depolarizing composition then tamped in, or the copper oxid may be tamped into a bag, supported by a mold, and the vfilled bag may then be placed in the container. When the oxid is to be tamped into the lined container under considerable pressure, it is desirable to provide a removable Zinc electrodes 5 are pro- As shown in Fig. 9. perforated sheet metal 8 may be covered with paper or the like 7 for use in making up the dcpolarizer containers. The paper may be readily applied by passing it with the metal betwcen rollers, an adhesive being previously distributed over the surface of contact between the materials. The paper-coated metal may then be formed into containers in the usual manner. Lined containers may be conveniently made at low cost in the manner described.-

0- prefer to use relatively thin, unglazed paper. This is sufliciently strong to remain intact and prevent sifting of the depolarizer, but is readily disintegrated by the caustic electrolyte. After assembly of the cell there is no need for continued closure of the perforations and the removal of the closing means by disintegration, or the like, is desirable to permit unimpeded access of the electrolyte to the depolarizer.

According to another form of the invention, illustrated in Fig. 3, a removable Wrapper 9 is provided. The wrapper may be made of heavy paper, cloth, or the like and is secured by means of adhesive strips 10, which retain it in smooth, firm engagement with the container. Strips 10 have projecting ends 11 which may be grasped to tear off the strips and permit the removal of the wrapping when the container is to be laced in electrolyte. Various other means curing the paper or the like to the container may be adopted, provided they permit. of The ready removal of Aside from the advantage of retaining.

the (lepolarizer, the wrapping may also serve to protect the surface of the conta ner, making 1t unnecessary to use iron which has been tinned or otherwise treated to prevent- The cost of .the container is thus rusting. reduced and 01' sea a positive advantage is obtained I by the elimination of tin and other coating metals detrimental to cell action} We are aware that it has heretofore been proposed to fill the perforations in depolarizer containers with an electrolyte-soluble mechanically or by the disintegrating action of the electrolyte. In this manner reliable protection against sifting is provided Without materially increasing the internal resistr to moisture but adapted to be dissolved by ance. of the cell.

We claim:

1. A primary cell comprising a container, zinc and copper electrodes, and electrolyte, said copper electrode comprising a perforated copper'contain'er, a body of copper oxide therein and a rotective member therefor comprising a ayer of "thin un lazed paper surrounding said copper oxi e between said copper electrode and said copper oiride, said paper being normally resistant to water and soluble in said electrolyte to cause oxide and container to contact on putting in service.

caustic solution, a zinc electrode therein, a

copper electrode adapted to bepositioned therein and comprising a perforated sheet copper container, a thin unglazed paper liner therefor having a substantial resistance said electrolyte, and a body of copper oxide within said copper container and separated therefrom'by said paper prior to putting in service thereof.

In testimony whereof I aifix my signature,

.GOFFREY A. LYON. In testimony whereof we afiix our signatrues. E

' GEORGE W. HE'ISE.

RAYMOND W; ERWIN,

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