oct. 29, y1946-. H. A. JACKSON . 2,410;164 . ELEGTRODE HOLDER Filed Feb. 4, 1944 Hana/Adm‘fd/J v lNvENToR BY ` i _ ATTORNEYS. Patented Oct. 29, 1946 " 2,410,164 UNITED l STATES PATENT o Fries 2,410,164 ELECTRODE HOLDER l lionel A. Jackson, Detroit, Mich. Application February 4, 1944, Serial No. 521,005 5 Claims. (Cl. 219----8) `2 This invention relates to an electrode holder and moreiparticularly to an electrode holder for arc welding. reenforcement is molded within `the Bakelite This invention` contemplates an electrode Insulating cover 2 is provided with a metal cover. shield or sheath 5 which surrounds the insulat ing cover at the head end ofthe holder. Shield 5 holder for arc kWelding which is streamlined and compact to facilitate welding in close quarters. It is an object of this invention to produce an is preferably made of thin sheet brass or alumi num and serves to protect insulation f2 lagainst the heat radiated from the arc during Welding and also serves to protectlthe >insulation against insulated electrode holder rhaving long lived insu lation. This‘object is achieved by providing the insulation with a protecting metal cover which is insulated from the body and-‘other current con ducting parts of the holder. damage in case the head ofthe holderi is struck or strikes against another object such as might . occur when the holder is--dropped Insulating cover 2 is preferably molded in themetal no_s’e‘ or It is also an object of this invention toproduce -a holder having a simple, economical and e?lìcient shield 5 and has a skirt portion 40 overlapping handle 6 and which serves as a hand-gripfor lock -for locking the electrode in the holder. jIn the drawing: . i >turning the head I to lock Vthe electrode in the head or release the same therefrom. „The nose Fig. 1 is a longitudinal section through my electrode holder -showing the parts in released portion and hand-grip portion ofthe insulating position. Fig. '2 ‘is a fragmentary 'longitudinal section 20 cover 2 preferably are molded `as one integral piece or unit. Shield Y5 isl circumferentially along theline ‘2-201e Fig. 6 through my holder knurled as at 4I and insulation 2 is molded over showing the electrode locked in the holder. the knurled portion as at 42 so as to lock vthe Figs. 3, 4 and 5. are sections along the lines3-3, insulatingcover to the shield 5. _ l . 4--4 and 5-5 of Fig. 2. The -metal sheath 5 is provided With an opening Fig. 6 is an elevation of my electrode holder. vI2 :surrounding an opening I3 in insulating cover From the drawing it will be observed-that the 2 .through which thexelectrode isadapted toçbe holder is shaped like a torpedo. The holder com passed -into socket I4 of head I. The insulationrZ -prises the lfollowing parts: a head I, an 'insulat is preferablymolded in cover 5 and fills the .open ing cover 2 Vfor the head, an electrode locking . ing I2 flush with the outside surface of sheath 5. plunger 3 mounted in'bore 4 in the head, a metal Insulating cover 2 and sheath 5 are retained on protecting shield 5 for the insulating cover 2, `an head I„by a locking pinl I5 which passes through insulating handle 6 mounted on a metal adapter openings provided in head I, insulation 2 and 1 which has a threaded fit with the head as at 8, sheath 5. Pin I5 is arranged to „be driven out of -a cable 9 secured in the end o'f the adapter 1 and the rhead and insulation membersl topermit re moval of the insulating `cover 2 from the head l. Pin I5 is preferably made from canvas reenforced in electrically conducting -relation Vtherewith `by the set screws I0. The electrode is designated I I. molded plastic such as Bakelite. Handle 6 is preferably tubular .and retained on the adapter 'l by means of a vtapered pin |_6 driven or alloys having 4high electrical conductivity, such 40 into opening .I1 in adapter'l and into openings as copper, aluminum, and their alloys. I8 in handle 6. lTapered pin I6 prevents handle y Head l is streamlinedandshaped like the head 6 from slipping on adapter T and since it is made of a torpedo. The >insulating cover `2 completely from insulating material such as molded Bakelite surrounds head II and can be .made from electrical or Bakelite reenforced with canvasror .asbestos and heat insulating materials preferably having The head I, plunger 3, adapter 1 .and cable 9 can be made Afrom any of the well-known metals low heat conducting properties, capable of with ' fibre,` pin ~vI6 prevents arcing.> Pin IB can be re moved by driving the same out of openings I1 standing high temperatures and also having high strength. The insulating cover should be capable of withstanding high impact because the electrode holder is frequently _dropped by the operator and in many cases may even be used as .a hammer or and I8.V IAdapter1 'l is provided with a bore I9 threaded 50 as at 8 and is arranged to have a screw fit on the threadedfend of head l._ _This screw fit ofthe handle adapter 'l o-n head I is utilized for moving subjected to other abuses wherein the insulation plunger 3 into locking engagement with the elec is subjected to high impact. Insul-ating cover 2 trode I I and also for releasing the same. Plunger can be made from high temperature thermoset ting plastics, such as Bakelite. Preferably canvas 55 3 is provided with a ball bearing 20 at each end. Each ball bearing is retained in its socket 2I by 2,410,164 3 peening over the surrounding edge of the socket as at 22. The ball bearing 20 is free to rotate in its socket 2| and thus presents a diilîerent surface for contact or locking engagement with the elec trode I I each time the electrode is replaced. This distributes the wear fairly uniformly over the sur face of locking bearing 2|. When one ball bear ing shows appreciable wear the plunger 3 is re moved from the head and turned end for end, thus 4 bearings and plunger are removable as aunit from said head, and means co-acting with said head and the ball bearing in one end of said plunger whereby the ball bearing in the opposite end of the plunger is forced into locking engagement with an electrode in said socket. 2. An electrode holder comprising in combina tion an electrically conducting head having a socket therein adapted to receive the end of an presenting the other ball bearing for locking er1 10 electrode, said head having a longitudinal bore communicating with said socket, a plunger slid gagement with the electrode. able in said bore, ball bearings journaled in the The plunger 3 has a reduced portion 23 inter opposite ends of said plunger whereby said ball mediate its ends. A locking pin 24 has a friction bearings and plunger are removable as a unit fit in opposed openings in the head I and passes from said head, a handle independent of said 15 through the recess or clearance provided between plunger having a screw fit on the end of said head the ends of the plunger by the reduced central and contacting one of said ball bearings for fore portion 23. Thus plunger 3 is free to move longi ing the other ball bearing into locking interen tudinally in bore 25 of head I but cannot fall out gagement with an electrode in said socket. when head I ís disconnected from the handle 6, 1. 3. An electrode holder comprising in combina When it is desired to replace plunger 3, handle 20 tion an electrically conducting head, an insulat 6, 1 is screwed off the end of head I, pin 24 is ing cover surrounding said head, said head having driven out or removed from the head, and this a socket adapted to receive the end of an electrode, permits plunger 3 to drop out of the head. If for said insulating cover having an opening adjacent any reason the plunger should stick in the head, a said socket through which the end of the electrode small rod can be passed through opening 26 in 25 is passed into said socket, cooperating openings in the head end of the holder and the plunger driven said head and insulation, and a pin of insulating out. Insulation 2 and the metal cover 5 can be material passing through said openings for lock removed from the head by ñrst removing the lock ing the insulating cover on said head. ing pin I5 which permits the insulation and metal 4. An electrode holder comprising in combina 30 cover to be slid off the head. tion an electrically conducting head, an insulat In operation the end of the electrode I I is slid ing cover surrounding said head, said head having into socket I4 and handle 6 is turned from the a socket adapted to receive the end of an elec position shown in Fig. l whereupon the bottom 21 trode, said insulating cover having an opening of bore I9 in adapter 1 engages the right hand adjacent said socket through which the end of ball 20 to move the plungel- forward toward the 35 the electrode is passed into said socket, and a electrode. This brings left hand ball 2!! into a metal cover surrounding said insulating cover and tight locking engagement with the end of the elec insulated from said head, said metal cover also trode. The current is principally carried to the having an opening adjacent the aforementioned electrode from the cable 9 through adapter 1 and opening in the insulating cover for said electrode, 40 head I, although a minor flow of current will pass said metal cover serving to reilect heat radiating through plunger 3. from the Welding arc and to protect the insulat It should be noted that the head end of the ing cover against damage, and cooperating open electrode holder has an outline in longitudinal ings in said head and insulating cover, and a pin section which is substantially a parabola. Mak of insulating material in said openings for locking ing the head end of the holder a parabola in lon the said head, insulating cover and metal cover gitudinal section gives the holder a compactness together as a unit. so that it is capable of working in much closer 5. An electrode holder comprising in combina quarters than other types of holders now on the tion an electrically conducting head, an electri market. cally conducting adapter having a threaded con nection with said head, an insulating handle cov ering said adapter, an insulating cover surround ing said head and having a skirt portion which overlaps one end of the insulating handle, said The pitch of threads 8 is such that a quarter ’ turn of handle 6, 1 is all that is necessary to lock the plunger against, or release it from, the weld rod II. This facilitates loading and unloading of the holder. To remove handle 6 from adapter 1, pin I6 is ñrst driven out of openings I1, I8 whereupon the handle can be slid oil adapter 1. i head having a socket adapted to receive an end The use of pin 24 is optional and the same can be omitted if desired. of an electrode, said insulating cover having an opening adjacent said socket through which the end of the electrode is passed into said socket, and means of electrically non-conducting mate Head I is preferably provided with a plurality of longitudinal grooves 50 which provide air spaces (if) rial for locking said insulating cover to said head, and a 'plunger mounted in said head having one between head I and the insulating cover 2 to aid end arranged to contact said adapter and the in cooling head I. other end to project into said socket whereby rel I claim: ative rotation between the hand-grip portion of 1. An electrode holder comprising in combina said insulating cover and the handle effects lon tion an electrically conducting head having a socket therein adapted to receive the end of an electrode, said head having a longitudinal bore communicating with said socket, a plunger slid able in said bore, ball bearings joumaled in the opposite ends of said plunger whereby said ball 70 gitudinal movement of said plunger and projects the said other end of the plunger into said socket to lock an electrode therein. HONEL A. JACKSON.