US1018003A

US1018003A - Carbon electrode for electrical purposes.

Info

Publication number: US1018003A
Application number: US65453311A
Authority: US
Inventors: Berthold Redlich
Original assignee: PLANIAWERKE AG fur KOHLENFABRIKATION
Current assignee: PLANIAWERKE AG fur KOHLENFABRIKATION
Priority date: 1911-10-13
Filing date: 1911-10-13
Publication date: 1912-02-20
Anticipated expiration: 1929-02-20

Description

B. REDLIGH. CARBON ELECTRODE FOR ELECTRICAL PURPOSES.

APPLICATION FILED 001. 13, 1911.

1,018,003. Patented Feb. 20, 1912.

1 111 WEB 1/1 5 Zarzzay.

- pose,

Ultra i an Per i BERTHGLD BEDLICH, 0F RAHIIBOR, GEREEANY, ASSIG-NQB, 530 THE FIRM 0F SZ-IuFiNZA- WERKE AKTIENGESELLSCHAFT Fill? KOHLEIIFsiBEITKATIQN, GE RATIBQR, (i ETfi- MANY.

Specification of letters Eatent.

cannon nrinc'rnonn ntncrnrcnn runrosns.

Application f led Gotober 13, 1911. fierial l'o. 654,533s/ Germany, doctor of chemistry, have invented a certain new and useful Carbon rllectrode for Electrical Purposes, of which the following is a specification.

In the'working of electric furnaces and the like when inserting new carbon electrodes, the remainder of the old electrode was connected with the new electrode so as to avoid any loss of material, for the purin this. manner, of utilizing even the smallest remaining piece of carbon. The connection ofrt ew electrode with the remainder of thevoldelectrode lias been of fected in various ways, for example, the

electrodes were provided with an internally threaded boring at their ends inwhich a nipple was screwed. The connection. has also been eflectedby means of suitable car-- bon fittings. Observations have, however, shown that when utilizing such carbonsa considerable intermediate resistance was formed. at the connecting points. In order to avoid this disadvantage the intermediate resistance should be reduced as far as possible.

It has been previously proposed to con struct the connecting pieces of metal; The connection of electrodes by means oi. a suitable fitting is, however, for the purpose of permitting them to be employed in electric furnaces without any wast-c. For this purpose it is necessary that the connecting points as Well as theconnecting piece should be inserted in the electric furnace and in. the fusing loath itself. The employment of metal connecting pieces is not suitable for this purpose, inasmuch the metal on bei. g

introduced into'the furnace lid. fuse and evaporate, so that t won. no longer be any connection, outed would lhi.- discern age overcome if the connecting piece is made oi carbon, in which metal bars are ei'nbedded. It has been previously proposed. to construct the connecting piece of a carbon'mass permeated with metal powder, but this would render the connecting piece more fragile.

The fragility naturally plays an important" The inserpart for; the connecting piece;

the purpose nrosetion of a metal bar, does not increase the fragility of the connecting piece, but rather decreases it, more particularly if the metal bars provided in the connecting piece diverge at both ends to form expansions or plates. in this case if the connecting piece tact between the 'connecting piece and the electrodes. A further a Vance can be made in this direction by arranging metal bars in the, electrodes themselveswhich form contest with the metal bars. in the connecting These metal bars also Where they encounter the threaded borings of the elec: trodes diverge to form expansions or'plates pieces.

or the like.

I shall now describe my invention with reference to the accompanying drawing in which- I Figure 1 shows a. connecting piece consisting of a carbon block a with a metal bar 5. The metal bar 5 can as shown in igs. 2 and 3 be of round, triangular, quadrangular or polygonal. cross section.

' Fig. i shows a connecting piece in which the carbon block a is also provided with a metal insertion and in which the latter is provided at both ends with metal plates 0. According to the drawing these plates are screwed into the threaded bcrings J ol the electrode (see Fig. 5}. it is, however, evident that instead or the threaded borings other openings correspondingly formed for example dovetailed grooves might be provided.

5 shows a carbon electrode 6 with the 'hreaded borings 01 and a metal bar f pro- 'ecting into these hr-leaded borings. it is ere intended when "screwing the connecting iece a into the cringe d to form contact 'etween the metal b r b of the connecting oiece and the metal bar i in.

he met a]. bars of t 1e electrodes (compare Figs. 6 and 7). The cross section may be round, triangular,quadrangular or polyg- This latter arrangement is fun.

.1 n I /,()I the electrode. any cross section also be employed for onal, and the metal bars of the electrode as well as those of the connecting pieces can be made of steel, wrought-iron, cast-iron, or any other suitable metal.

Fig. 8 furthermore shows that it is possible to allow the metal bar f arranged in the electrode 6 and projecting withits end into the threaded boring-of the electrode, to diverge so a sto form an expansion or plate g.

What I claim as my invention and desire to secure by Letters Patent is 1. The combination with carbon electrodes for electrical purposes, of means for connecting an old electrode to the new electrode comprising a carbon connecting piece, and means for equalizing the intermediate resistance of the connecting piece.

2. The combination with carbon electrodes for electrical purposes of means for connecting an old electrode tothe new electrode comprising a carbo-n'connecting piece, and means for equalizing the intermediate resistance of the connecting piece, consisting of a metal core embedded in theconnecting piece.

3. The combination with carbon electrodes for electrical purposes of means for connecting an old electrode to the new electrode comprising a carbon connecting piece, and means for equalizing the intermediate resistance of the connect-ing piece, consisting of a metal core embedded in the connecting piece, and expansions at the ends of the cores, said expansions being obtained by di-, verging the ends.

4. The combination with electrodes of a connecting piece consisting of a block of carbon, and a metal core within said bloclr of carbon. t I

5. The combination with electrodes of a connecting piece consisting of a block of carbon, and a metal core Within said block of carbon and enlargements formed atthevends of the metal core.-

6. An electrical connection comprising electrodes, metal cores in said electrodes, said electrodes having recessed endsfa carbon connecting piece in said recessed ends, and metal cores in said connecting pieces,

the metal cores in the connecting pieces contacting with the metal cores in the elec-J trodes. Y

7. An electrical connection 4 comprising electrodes having internally screwed recesses,

onsaid metal cores, externally screwedtcarbon blocks fitting in the recesses of the elecmetal cores in said electrodes, enlarged ends 0 trodes, metal cores in said. carbon blocks,

and enlarged ends on the metal cores of the blocks, said enlarged ends contacting with the enlarged ends of the electrode cores.

In testimony whereof I have hereunto,

signed my name to this specification in the presence of-two subscribing witnesses.

BERTHOLD REDLICH. j

WVitnesses:

FRANK G. Porrs, Lorns A.; KATzI