US1719863A - Furnace electrode carrier - Google Patents

Description

July 9, 1929. w z

' I FURNACE ELECTRODE CARRIER Filed Dec. 27, 1926 Patented July 9, 1929.

. .UNITED STATES PATET orr es.

ERNST wmz, or BADEN, SWITZERLAND, nssreivon To AKTIENGESELLSCHAF'I' fenowic BOVERI & 0112.,- or BADEN, SWITZERLAND, A oonronnrron or SWITZERLAND.

FURNACE urinor'nonn oannrnn.

Application filed December 27, 1926, SerialNo. 157,260, and in Germany January 7, 1926.

This invention relates to electric furnaces, and pertamspart cularly to mprovements in x the constructlon of elect-rodecarrlers. I

In the erectlng of electric meltlng furnaces, difficulty is usually experienced inv adjusting the electrodes so that they will feed accurately and without jamming inthe seals orcooling rings or cover of the furnace. This is due to the fact that it is almost impossible, in practice, to obtain absolute accuracy in the brick work of the furnace and in the positioning of the carriage guides and the carriage handling mechanism with re spect to the furnace. I l

The general object of the present invention is the provision ofan improved construction for the electrode carrier which will afford a I suitable adjustability of the electrode with respect to the carriage and the furnace, so that the electrode may be properly positioned and fed. 3 l

Another object is the provision ofan improved adjusting with different types of carriages and electrode holders, so that the carriage does not have to be designed particularly .Withreference to the electrode holder or the furnace.

Other and further objects of the invention will be pointed out or indicated hereinafter,

In the drawing, Fig. 1 is a sectional elevatlon of a portion drawing forming a of the electrode handling gear taken on the v longitudinal axis of the same;

Fig. 2 is across section on substantially line 2-2 of Fig. 1;

Fig. 3 is a sectional elevation similar to Fig. 1 but of a modified form of construction; and

Fig. 4 is a top view of same. i

In the construction illustrated in Figs. 1 and 2, the reference numeral 10 designates a portion of the electrode carrier frame, which r frame is supported for vertical travel on the gear which may be used or will appear to one skilled in the art upon p I show two structhe shank 19.

guides 11 by: the rollers 12. I Adjustably mounted on the carriage frame is a split sleeve comprising an upper member. ll which 1s connected to a lower member 15 by means of b 0ltS Il6. /Th6 lower member 15 has piv.- otal mounting on a pivot 1750 that it may be rockedin a vertical direction, its adjustment being determined by a stay bolt 18, In the split sleeve member is: clamped a cylindrical shank19 of a fork member 20, which may be rotated on a horizontal axis when the bolt-s 16 are backed off, and clamped in the desired adjustment by the setting up of the bolts 16. The jaws 21 and 22 of the electrode holder havea hinge mounting on a spindle 2i inthe fork member20, and clasp the electrode 25 under the pressure of a' spring 26 carried on a swing bolt 27. j The j aws, and the electrode are movable horiz ontallyias a unit by swinging movement on the spindle 24. By virtue of this construction, the electrode is uni-versally adjustable with respect to the furnace. It has rectilinear vertical movement by virtue of the verticalyadjustability of the carriage on the guides 11 it has rectilinearhorizontal adjustability toward and. from said guides by. virtue of the longitudinal adjustability of the shank 19 in the split sleeve memher; it has arcuate adjustability in Vertical lanes by virtue of the rotary adjustment of the shank 19 in the split sleeve member and the adjustability of the split sleeve member about the spindle 17 and it has arcuate horizontal adjustability about the spindle 24. Accordingly, the position of the electrode may be adjusted so that it will feed vertically and accurately, irrespective of inaccuracies in the relative positioning of the furnace and the carriage guides.

In the embodiment illustrated in Figs. 3 and 4:, the carriage frame portions 10 support the split sleeve member 14-15 which is pivoted on the pivot 17 is adjustably controlled by a stay bolt 18, and the shank portion 19 is adjustable both longitudinally and rotatably in the split sleeve member. The horizontal adjustment of the shank portion 19 is accomplished by a screw 28 which is angularly adjustable in a slot 29 in a cross member 29 and has thread engagement in a nut 30 that is adjustable about a horizontal axis in .At the outer end of the shank 19 is a head piece 31 fixedto and insulated from the shank and carrying a tapped extension 31 inwhich is threaded an adjusting screw 32. This screW'32 has a journal mount ing in lugs 34 of the carrier head 34 Which has a sliding bearing against the outer face of the member 31. Thus, rotationtof screw 32 Will accomplish rectilinear adjustment of the carrier head 34 transversely of the mem ber 31. The clamping jaws 35 have a hinge mounting on the carrier head 34: and are retained by-swinging bolt 36 in clasping en gagement With the electrode. By virtue of this construction, therefore, the electrode is given horizontal adjustmentby virtue of the longitudinal "adjustability of the shank 19 and the transverse adj ustability of the carrier head 34, vertical adjustment by virtue of the vertical mobility of the frame 10 on the carriage-guides 11, as in the first example and arcuate adjustment by virtue of the remy adjustability of shank 19 and pivotal adjustability of the split sleeve about the pivot 17. p e

For convenience of designation, the electrode retaining elements may be referred to collectively as the electrode holder, the split sleeve, whereby the device is mounted on the carriage, as a mounting, and the adjustable member whereby the holder is attached to the mounting, as an intermediate member.

For purpose of simplification, the connections and devices for supplying current and cooling fiuidtothe carrier are omitted from the illustration. It Will be understood also that suitable arrangement of insulation is provided for isolating the holder from the carriage.

lVhat I claim is: j j

1. In electric furnace apparatus an electrode holder, a supporting carriage, a mounting universally adjustable on the carriage, and an intermediate member having adj ustable connection With both the holder and mounting and providing a supporting connection therebetween.

2. In electric furnace apparatus, an electrode holder, a supporting carriage, a mounting having'adjustable connection with the carriage, an intermediate member having adjustable connection with boththe mounting and the holder, said intermediate member having angular and rectilinear adj us'tability on the mounting, and means for securing the mounting and intern'iediate member against relative movemet.

3. In electric furnace apparatus, the con1- bination' ith a vertically movable carriage, of an intermediate member having angular and rectilinear adjustment on the carriage, and an electrode holder having transverse adj usta-bility on the intermediate member. I I

4. In electric furnace apparatus, the conibination with a vertically movable carriage, of a mounting having pivotal connection With the carriage, an intermediate member supported on the mounting and having piv; otal and rectilinear adjustment thereon, an electrode holder having adjustable mounting on the intermediate member, and'means for securing the mounting and the intermediate member in fixed positions with respect to the carriage. J y

In testimonywvhereof I have hereunto subscribed my name 'atZurich, Switzerland, this 9th day ofDec, 1926.

ERNST VVIRZ.

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