Патент USA US2405403код для вставки
Patented Aug. 6, 1946 2,405,403 UNITED STATES PATENT OFFICE 2,405,403 (lARBON ARC ELECTRODE HOLDER Steve Chronis, Corona, N. Y., assignor, by mesne I assignments, to Solar Aircraft Company, San‘ Diego, Calif., a corporation of California dpplicationbctober 19, 1944, Serial na's’sassli 4 Claims. (oils-lei 2 This invention relates to a carbon arc electrode Fig. 2 is a front elevational view thereof taken in cross-section in the plane of the line 2—'2'" of holder; v'and'more particularli'r to an electrode holderfor a' carbon arc apparatus such as is-em bodied in ‘an ‘electric furnace.‘ \ ' ' Fig. 1,'and " '"F ~ ' ' > - Fig. 3'is a View thereof taken in transverse sec tion in the plane of ‘the line -3—3 of Fig. 1. ‘ ' Referring. now more in detail to the drawing, r - 7 Carbon rod electrodes in an arc furnace are mount'edin metallic holders included in the op erating electric’circuit. The carbon rod electrode is locked to the‘holder by a securing element the electrode ‘holder ‘comprises a block-shaped casing, generally designated as HL'de?ned bythe‘ front and rear walls 12 and M, 'the ‘side walls It which is manually releasable when it is desired‘ to remove a spent or‘ used electrode and replace 10 and I8 and the ‘top and bottom walls 20 and‘ 22; the said block casing being adaptedtobe mounted it with a fresh carbon ‘rod. > In" known structure in the apparatus of which‘it forms‘a part; suchas of ‘electrode'h'olders', the‘ release of the securing in an electric furnace, and'connected in theelec element ‘loosens the‘connection between the'el'ec tmae'a'n'a the securing elementias'well‘as the trical circuit therefor. For >mounting the same; metallic holder, thus'fre'eing'ithe electrode for 15 the bottom wall 22 may be grooved; providing the two marginal lips or'flangeszll- and 2B, and the withdrawal from the holder and permitting’ a new-electrode to be freely'replaced; This loose block may be centrally threaded as at‘ '28‘ for re ceiving a ‘mounting securingelement: Although connection produces or' results in a gap ‘between electrode and :the liolderparts. ' " 7' the block casing Ill may besmade as an integral ' Iti is“the‘ci1s"toinary?or usual practice for the 20 or unitary piece; it is preferred» in the present-in vention to form the top thereof as a separate cap operator to maintain or ‘keep on thec'urren't when piece‘ 30 which is detachably ‘mountable;- and ahelect'rode is‘ removed from and anew electrode which is secured in position by-‘means'of th insert'ed‘i'nto the holder. Z'When this‘is’ done’with known ‘structures of the type described, arcing in? variably takes'place at the‘gap’ in'the" loosened headed bolts (four in number) 32--32. >- ' ‘- ‘ To'carryout the object of the invention th connection-both “whenan'old electrode is removed holder‘ I0 is formed with achannel -34— extend and‘ a new one in’sertedi- 5 This varcing attacks'and element‘or' the holder or both,"and this n’ece‘ssi-I ing through" the depthof the holder between the front ‘and rear~wa~lls I2“ and I4 ‘thereofythe said channel being shaped to‘ receive 'a‘carb0n rod tates frequent‘ replacement of such securing‘ele; 5-3 ' electrode ~35,"th'e1channe1 ‘being, however, open corrodes or'eats'away the ‘metal of the ‘securing r'nents and‘holders. ‘ ' " “ at its top over a portion of the circumference of ' the receiving electrode as at-38 >('see"particularly Fig.2); The holder is~further provided ‘with .a lates-to the provision‘ of “a carbon arc‘ electrode contact shoe Mimounted at the top thereof,‘ and holder in which the "carbon electrode'may‘ be re; mounted in the "top for limited 'vertical'move; moved orreplaced while‘the‘current to the ma ment in the holder. vThis contact shoe '40 prefer chlne‘is maintained,‘ without the ‘liability of such ablyiexten’ds through the‘ holder over its'entire deleterious arcing taking place; In the electrode depth, from the ‘front wall l2 to'the rear wall [4 holder of the present invention, ‘gaps are pre thereof; “The contact shoeellll'is' ‘formed with‘a vented from occurring by constant electrical con tact being maintained between the electrode'and 40 contact face “at its bottom, positioned at the open top 3801? the channel 34 and complement all parts of ‘the holder when the securing element ing the'face’ of the channel'to'form or 'de?nel is ‘released or‘unlocked to permit free'egress or withdrawal of ‘a spent electrode and ‘free ingress therewith a seat for the'carbon electrode 36; as is more clearly'shown inY‘Figs; 1 and 20f the-draw orinsertion of a fresh electrode. L ‘ ‘ “5 The prime’objec't of my present invention re ' "Toe the accomplishment of the foregoing and. 45 such other ‘objects as may hereinafter appear, ‘my invention‘ relates to the 'carbonr'i'arc electrode holder ‘as sought to be'de?ned in the appended claims and“des'cribed-in‘~‘the' following speci?ca tion, taken together with the accompanying- draw ing iniwhich: " ' " ' ‘ ‘1' '-‘ ing. The contact ' > shoe ~ 40 is so mounted a and is so operable in "the-‘holder’ 'lll‘that arcing gapsare prevented ‘or’ obviated ‘from occurring because of the constant electrical ‘contact’ whichis caused 50 to‘be maintained between the carbon electrode as andthe'seating parts of the "holder when the l 'is‘a vertical elevational View in medial electrode is released or unlocked to "permit free egress or withdrawal of a spent or used- electrode, and free ingress or insertion of a‘fresh'or new longitudinal cross-section of an electrode holder embodying‘the'principles of construction of‘ my 55 electrode. ' ' i = 2,405,403 3 tice to circulate a cooling ?uid therethrough to To carry out this object and accomplish these results, resilient means are provided in the hold er for yieldably urging the contact shoe to its electrode seating position for constant contact with a carbon electrode being removed from or absorb heat developed in its use. Cl replaced in said holder, and means are provided for positively moving the contact shoe to and holding the same in its seating position to lock the carbon electrode in the holder. The contact shoe 40 is movable vertically with 10 in limits in a recess 44 formed in the holder, complemental portions of which are formed in the main block 10 and the cap 3t, as clearly shown in Figs. 1 and 2 of the drawing. Cen This is ac complished by chambering the lower part of the holder by providing the communicating ducts 53 therein, and by connecting to the ingress duct a nipple 60 and to the egress duct a nipple 62, both of which may be connected by means of the pipes 64 and $6 to a supply of circulating cool~ ing ?uid. The manner of making and using the electrode holder of my present invention, and the several advantages thereof, will in the main be fully apparent from the above detailed description thereof. In addition to accomplishing the main object of preventing arcing from taking place trally of the holder there is mounted an adjust when a carbon rod electrode is removed from ing screw 46 provided conveniently at its oper and another replaced in the holder while the ating end with a knurled ?nger wheel 48, the current to the machine is maintained and thus said adjusting screw being threadedly mounted preventing the holder parts from being attacked centrally in the holder cap 30. The lower or free or corroded and thereby increasing the useful end of this adjusting screw is stud-shaped as life of the holder, other objects are desirablyr at 50, and said stud is seated in an opening or achieved, such as the provision of a holder in recess 52 formed centrally in the shoe 40. On which changing an electrode may be accom opposite sides of said adjusting screw are mount~ plished with facility and rapidity and in which ed a pair of springs 54 and 56 active on the the parts of the electrode are of comparatively opposite ends of the contact shoe for yieldingly 25 simple design and may be assembled and dis urging the same to its electrode seating position. assembled with considerable ease and conven These springs are conveniently seated in aligned ience. ' recesses formed respectively in the shoe 4e and While I have shown and described an elec in the holder cap 30, as best shown in Fig. 1 trode holder of the present invention in its pre of the drawing. 30 ferred form, it is apparent that many changes By means of this construction, the adjusting may be made in the construction thereof with screw 46 is used for positively moving the con out departing from the spirit of the invention tact shoe to and for locking the same in its de?ned in the following claims. seating position to lock the carbon electrode in I claim: the holder, as depicted in Figs. 1 and 2 of the 35 1. A carbon arc electrode holder comprising a drawing, and when this adjusting screw is moved holder having a channel therethrough, said chan to unlock the contact shoe and loosen the carbon nel being open at its top, a contact shoe extend electrode for removal and replacement, the ing through said holder at its top and mounted springs 54 and 56 exert a constant pressure on the shoe urging the same to its electrode seating 40 in said holder for limited vertical movement therein, said contact shoe having a contact face position in constant contact with the electrode at its bottom positioned at the open top of said being withdrawn or inserted. Thus, when the channel and complementing the face of the chan adjusting screw 46 is rotated in one direction nel to form therewith a seat for the carbon elec to unlock the contact shoe, the shoe is released for free upward movement in the recess 44 under 45 trode, spring means in said holder active on the contact shoe for yieldably urging the same to the resilient or spring pressure, however, of the its‘ electrode seating position for constant con springs 54 and 56. When the carbon electrode tact with a carbon electrode being removed from 36 is now withdrawn, or a new one inserted, con or replaced in said holder, and a hand screw stant electrical contact therewith is maintained, threadedly mounted in said holder and having thus obviating the formation of any arcing gaps. its free end free from but engageable with the After a fresh electrode is inserted the adjusting contact shoe for positively moving the same to screw 46 is rotated in the opposite or reverse di and holding the same in its seating position to rection to positively move the contact shoe and lock the carbon electrode in the holder, the said hold the same in its seating and locking position. Preferably, the connection between the free 55 contact shoe being also rockably mounted in said holder about its region of engagement with the stud end 50 of the adjusting screw as and the free' end of said screw. ' central recess 52 in the shoe is such that the 2. A carbon arc electrode holder comprising a shoe, in addition to its vertical movement in holder having a channel therethrough, said the holder, is capable of a rocking movement about the adjusting screw stud. Also, the con 60 channel being open at its top, a contact shoe ex tending through said holder at its top and mount struction is such that when the adjusting screw ed in said holder for limited vertical movement is moved to releasing position the stud thereof therein, said contact shoe having a contact face is not completely withdrawn from its mating at its bottom positioned at the open top of said shoe recess, and thus the shoe is held against longitudinal or through displacement in the 65 channel and complementing the face of the channel to form therewith a seat for the carbon holder. To permit of the rocking action of the electrode, spring means in said holder active on shoe, the diameter of the stud is slightly less than the contact shoe for yieldably urging the same the diameter of its mating recess. By means of to its electrode seating position for constant con this construction, a new electrode may be more readily or quickly slid or threaded into position 70 tact with a carbon electrode being removed from or replaced in said holder, and an adjusting in the holder, and the shoe, while capable of a screw threadedly mounted at the top of the hold limited vertical movement and a rocking move ment, is prevented from longitudinal displace ment in the holder. In electrode holders of this type, it is the prac er and having its inner free end seated in a recess of said shoe, said adjusting screwv when rotated in one direction acting to unlock said 5 2,405,403 shoe for vertical resilient motion and when ro tated in the reverse direction acting to positively move the contact shoe to and hold the same in its seating position to lock the carbon electrode in the holder. 3. A carbon arc electrode holder comprising a holder having a channel therethrough, said channel being open at its top, a contact shoe ex tending through said holder at its top and mount 6 4. A carbon arc electrode holder comprising a holder having a channel therethrough, said chan nel being open at its top, a contact shoe extend ing through said holder at its top and mounted in said holder for limited vertical movement therein, said contact shoe having a contact face at its bottom positioned at the open top of said channel and complementing the face of the channel to form therewith a seat for the carbon ed in said holder for limited vertical movement 10 electrode, an adjusting screw threadedly mount~ therein, said contact shoe having a contact face ed centrally at the top of the holder and hav- ' at its bottom positioned at the open top of said ing an inner free stud end seated in a recess channel and complementing the face of the in said shoe, the contact shoe having a rockable channel to form therewith a seat for the carbon movement in said holder about said stud, a pair electrode, an adjusting screw threadedly mount 15 of springs mounted in said holder and arranged ed centrally at the top of the holder and having on opposite sides of said adjusting screw active .its inner free end seated in a recess in said shoe, on the opposite ends of the contact shoe for a pair of springs mounted in said holder and ar yieldingly urging the same to its electrode seating ranged on opposite sides of said adjusting screw position for constant contact with a carbon elec active on the opposite ends of the contact shoe 20 trode being removed from or replaced in said for yieldably urging the same to its electrode holder, said adjusting screw when rotated in one seating position for constant contact with a car direction acting to unlock said shoe for vertical bon electrode being removed from or replaced resilient motion but the stud thereof engaging in said holder, said adjusting screw when ro said shoe to prevent endwise motion in said shoe, tated in one direction acting to unlock said shoe 25 said adjusting screw when rotated in the reverse for vertical resilient motion but engaging said direction acting to engage and positively move shoe to prevent endwise motion of said shoe, the contact shoe to and hold the same in its said adjusting screw when rotated in the reverse seating position to lock the carbon electrode in direction acting to engage and positively move the holder. the contact shoe to and hold the same in its seat 30 lng position to lock the carbon electrode in the STEVE CHRONIS. holder.