US1370989A - Electric furnace - Google Patents

Description

v R. o, NYE.- ELECTRIC FURNACE. APPLICATION FILED JULY 9, 1920.

Patented Mar. 8, 1921.

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R. D. NYE. ELECTRIC FURNACE.

APPLICATION FILED JULY 9,1920.

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m R a R. D. NYE.

ELECTRIC FURNACE.

APPLICATION FILED JULY 9,1920 1,370,989. Patented Mar. 8,1921;

zen of the United States, residing at Canton,

UNIT-En STATES PATENT OFFICE.

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mncrarc ruimacn To all whom it may concern:

' Be 1t known that I, RALPH D. Nxn, a cit1- in the county of Stark and State of Ohio, have invented certain new and useful Improvements in Electric Furnaces, of which the following 'is a specification. v

This invention relates to electric furnaces of the Heroult type rocking or swin which are mounted for g movement to pour the charge-andmore particularly to means for disconnecting the current conductor leading from the transformer to the furnace when the furnace is tilted. a

It has heretofore been the practice to con- -nect swinging or rocking furnaces with the transformer by means of a flexible cable conductor and the loop of this cable is sometimes necessarily required to be very long Whlch causes an exceedingly high-loss of voltage from resistance and reactance, and also; induction causesadjacent'metallic parts of the apparatus to be unduly heated by inducedcurrents, materially reducing the amount ofpower reaching the furnace from a given transformer capacity. p

The objects of the present inventlon are to provide means for disconnecting the current conductors leadingLl from the -trans formers to the electric rnace; to provide a flexlble. link between the transformer and furnace electrodes comprising cable conductorsand. a series of interengaglng lamilna'ted plates and to provide positive means for normally clamping the laminated plates together. I

The above objects together with other ancillary objects are attained by providing in combinatio1 1.with a transformer and a rocking orswlnfing furnace located adjacent thereto an a Y connected to the electrodes of said furnace and" supported by a frame movable with the furnace, conducting, bus-bars leading from the-transformer, and a-detachhble connection'-between .thecable conductors and. the transformer buabars. such connection beg. mg a series of..-- interengaging laminated plates an,d ifisyiew of the extremely .high

capacity of currentsTrequired for an electric furnace it is sometimes desirable to clamp the laminations together by some positive means su'ch as .the. clamping d means illustrite in the accompanyin rawings. The "invention .thus set io rth in gene fal .fiieelflcation of Letters Patent.

rranged to be tilted in .order to pour the charge,-a cable conductor Patented Mar. 8, 1921.

, application-filed m 9, 1920. Serial No. 394,913.

terms is illustrated in the. accompanying drawings forming part hereof, in which- Figure 1 is a side elevation of a rocking furnace and transformer. showing the im- PIOQGd connection embodying the invention, parts being shown in section for purpose of illustration Fig. 2, an;enlarged elevation of portions of the furnace and transformershowing the mpiovedeonnection;

the line 33, Fig. 2;.

' Fig. 3, a section on and Fig. 4, a section on the line 4-4=, Fig.2.

.Similar, numerals refer to similar parts throughout the drawings.

' The furnace l, is of the rocking or swinging type and is provided uponits under. surface wlth the toothed'segment 2 engageing the rack bar 3- which is mounted upon a suitable base or support 4;, For the purpose of rocking the furnace upon the rackbar 3 for pouring'the charge from the spout 5, an operating mechanism is provided comprising the large gear 6, a

pitman rod7 i connected to the wrist pin 8" upon said gear and to a pivotal connection .9 at the rear extremity of the toothed Seg ment 2, a pinion 10 meshing with said gear and being operatively connected in any suit-f electrodes 14 which extend into the furnace.

The electrodeframe is provided with pulleys 15, cables 16 being connected to the "p;

per end of the upright frame 12 andi-pass' mg beneath said pulleys and thence wardly overv pulleys 17 which are mounted? upon brackets pp upon-thef'flR -f" right frame 12, the cable 16 then passing downwardly over a suitable drum 19 which is operatively connectedin anysuitable and well known manner withthe shaft .of the motor 20 by means of which the electrode thus be raised and lowered frame 13 ma I 7 upon the uprlght frame 12. Suitable conductors 21 are supported upon the conductor frame 13' and connected to the electrodes 15;, said conductors oeing com I nected at their rear extremities to the flexible conductor cables 22 the rear extremities quired for electric furnaces it of which are supported from the frame 13 by means of hangers 23, a plurality of laminated plates 24 being fixedly connected to the rear extremities of said cable conductors.

The transformer 26 is provided with a frame 27 extending toward the furnace and carrying the transformer bus-bars 28, said bus-bars comprising a plurality of laminated plates 29, the outer plates being provided with upwardly and outwardly flared trough like flanges 30 arranged to guide the conductor plates 24 into position when a connection is made between the cable conductor plates 24 and the bus-bar plates.

In view. of the extremely high current reit desirable, if not necessary, together by some positive means and for this .-purpose the levers 31 are pivoted intermediate their extremities as shown in Fig. 2, to

I the cross frame 33, the upper extremities. of

said levers having connected thereto the clamping jaws 34 which engage the opposite sides of the bus-bar plates at the point where the connection is made. a

A screw threaded shaft 35 is pivotally connected at 36 to the lower extremity of one of the levers 31 and engages the nut 37, carried upon the lower extremity of the other lever 31', a handwheel 38 being fixed upon said screw threaded shaft for operating said levers.

When the parts are in the normal position and the furnace is in operation the jaws 34 will be tightly clamped against the op: posite faces of the transformer bus-bar thus positively clamping the s laminations together. p

. It will be understood that the transformer will be provided upon the high tension side with the usual circuit breaker 40 for breaking and closing the circuit, and that the disconnecting means between the cable conductors and transformer bus-bars are not usually employed for breaking and closing the circuit.

the laminations together.

When it is desired to tilt'the furnace to pour a heat, the hand wheel 38 is operated to unclamp the jaws 34 and the tilting mechanism controlled by the motor 11 is operated, tilting the furnace forwardly away from the transformer and automatically disconnecting the conductor plates 24 from the bus-bar plate, the circuit being previously When the furnace is tilted back into the operative position the conductor plates 24 will automatically engage the laminations of the bus-bar plates, and the clamping jaws will be again operated to positively-clamp It is evident that the disconnecting means herein described,

makes it possible to se- =the loss of production due to to clamp the laminated plates Lenses 1. In combination with a transformer and i a tilting furnace, a stationary current conductor leading from the transformer, and a current conductor mounted on and moving with the furnace, in detachable engagement with the stationary current conductor.

2. In combination with a transformer and a tilting furnace, leading conduct or mounted on and moving with the furnace, adapted for automatic engagement with the stationary current conductor when the furnace is moved into normal position. 3. In combination with 'a transformer and a tilting furnace, a stationary current conductor leading from the transformer, and a current conductor mounted on and moving with the furnace, stationary conductor, and adapted for diserigadgement therefrom when the furnace is ti te 4. In combination with a transformer and a tilting'furnace, a stationary current conductor leading from the transformer, and a urrent conductor mounted on and moving with the furnace, normally engaged with the stationary conductor, and adapted for automatic disengagement therefrom when the furnace is tilted. I 5. In combination with a. transformer and a tilting furnace, a bus-bar or the like leading from the transformer comprising a plurality of laminated lates and a current conductor upon the mace comprising a plurality of laminated plates arranged to engage the plates of the bus-bar. 6. n combination with a transformer and a tilting furnace, a bus-bar or the like leading from the transformer comprising a plurality of laminated plates and a current conductor upon the furnace comprising a plu-' rality of laminated plates arranged to enge the plates of the bus-bar, and means or disconnecting said laminated plates when the furnace is tilted;

7 In combination with a transformer and 'a tilting furnace, a current conductor leada stationary conductor from the transformer, anda current normally engaged with the 8. In combination with a transformer and I a tilting furnace, a current conductor carried by the furnace and a plurality of interengaging laminated plates carried by the current conductor and by the transformer and arranged to be disengaged when the furnace is tilted.

9.1111 combination with a transformer and a tilting'furnace, a current conductor carried bythe furnace, a plurality of interengaging laminated plates carried by the cur rent conductor and by the transformer and arranged to be disengaged when the furnace is tilted, and means for positively clamping said laminated plates together when. the furnace in] operation.

10. In combination with a transformer and a. tilting furnace, a stationary current conductor leading from the transformer,

and a flexible current conductor mounted on and moving with the furnace, in detachable engagement with the stationary current conductor. I

11. In combination with a transformer and a tilting furnace, a stationary current conductor, leading from the transformer, and a current conductor mounted on and moving with the furnace, in detachable clamped engagement with the stationary current conductor.

RALPH 1). NYE.

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