US2118274A - Shielded electrode holder - Google Patents

Description

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May 24, 1938. M, swEDA SHIELDED ELECTHODE- HOLDER Filed Oct. 2l, 1956 ,N Aem.

May 24, 193s. y M, SWE'DA 2,118,274

SHIELDED ELECTRODE HOLDER Filed 0G13. 2l, 1936 2 SheetS-SheefI 2 Michael Swed@ Patented Mty 24, 193s UNITED STATES PATENT OFFICE SBIELDED ELECTRDDE HOLDER.

Michael Sweda, Youngstown, Ohio .Application October 21, 1936, Serial No. 106,830

l Claim. `(Cl. 219-8) This invention is an improvement in electrode holders, and consists of a shield equipped holder of novel construction.

An object of the invention is to provide in an electrode holder an improved handle construction.

A further object of the invention is to provide electrode holders equipped to accommodate rods of various sizes, and to secure the electrode at any one of several different angles.

Still another object of the invention is to provide a completely insulated electrode holder which will not arc at any point on the holder except where desired, namely at the point of electrical contact with the. electrode.

Also it is an object of the invention to provide a ventilated handle for the electrode holder, together with an efiicient heat shield assembly for the handle.

'I'he objects of the invention also include that of providing novel connections between conduc-V tor elements of the electrode holder.

The invention, its objects and advantages will be more apparent from the following detailed description, when read in connection with the accompanying drawings, wherein:

Fig. l is a side elevational view of my improved electrode holder.

Fig. 2 is an, enlarged longitudinal sectional view therethrough.

Figs. 3 and 4 are detail sectional views taken on the lines 3 3 and 4 4, respectively of Fig. 1.

Fig. 5 isfa front elevational view of the holder. Fig. 6 is a perspective view of a. conductor rod.

Figs. '7 and 8 are detail sectional views taken substantially on the lines 1 1 and 8 8 respectively of Fig. 2.

Fig. 9 is a side view', of the end of one of the cables showing the manner oi bending its extremities.

Fig. 10 is a detail sectional view of the forward end of a modied form of head.

Referring to the drawings by reference numerals, it will be seen that in the preferred embodiment thereof, the electrode holder comprises a handle 5, preferably cylindrical and of suitable insulating material. Handle 5 may have a smooth exterior, as shown, or have external ribs to provide better purchase when the handle is gripped for turning.

At one end the handle I is suitably provided with an externally threaded nipple or extension 6 on which is screwed a head 1.

Head 'l is preferably of the shape shown, is socketed al illustrated. and is made from porcelain or any insulating material. Ventilating slots 32 are provided in the handle as shown.

At the open end of the head l are provided internal threads 8 to complement the nipple 6 as shown.

At the inner end of the head 1 is a small diameter portion 9 into which is insertable through an opening IIi, one end of the electrode Il. Laterally displaced from opening III` is a recess I2 in the wall of portion 9 for receiving the vinserted 10 end of the electrode when it is desired to position the latter at an obtuse angle relative to ,the holder.

A conductor rod I3 has a sliding t with a restricted diameter portion I4 of head 'I as shown 15 in Figs. 2 and '7. At one end said rod is provided with an enlarged threaded head I5.

A section I6 of a conductor cable has loosely engaging one end thereof a coupling'sleeve I1, internally threaded as shown and adapted to be threaded on the head I5 of the conductor rod I2 to couple said rod and cable section together and in electrical connection one with the other, as hereinafter referred to.

A second cable section I8 is electrically con- 25 `nected with the cable section I6 through the medium of an improved connection I9.

Connection I9, as shown in Fig. 3 consists of a rod 2li of conductive material having threaded ends 2|, 22, with which are screw threadedly en- 30 gaged coupling sleeves or sockets 23, 24, sleeve 23 serving to electrically connect cable I6 to rod 20, and sleeve 24 serving to electrically connect rod 2Ii and an end of cable section Il.

A suitable 'tubular cable guide 25 having its 35 inner end threaded as at is connected to the aforesaid second cable section I8 through the instrumentality of.a coupling sleeve or socket 26, said cable guide being preferably of hook shape to prevent that portion of the cable adjacent the 4'0' handle and pass/ing therethrough from twisting and kinking when operating the electrode holder. It wilibe noted that coupling sleeves or sockets Il, 23, 24 and 26 are identical in construction, each having the inner end of its socket frustroconical as at 2l.

Further each cable end has the strands of the cable spread, as clearly shown. Thus as a coupling sleeve is tightened the strand spreaded end is forced to wedge itself into the inner frustro- 5c conical end of the coupling socket to insure a positive and efilcient connection between a cable end and its associated coupling sleeve, as will be clear from a consideration of either Figures 2,- 3

For the holder there is also provided a front head shield 28, in the form of a plate constructed from suitable insulating material and suitably apertured to receive the end of head 1 as shown bestin Figs. 2 and 4. A suitable tie rod 29 is employed for clamping the shield on the head.

Also a second heat shield substantially semicylindrical in cross section is disposed at the underside of handle 5 and extends upwardly at opposite sides of said handle as shown. At one end shield 30 is secured tothe edge of front shield 2B at intervals by screws or the like 3|.

Shields 28 and 30 together with slots 32 serve to prevent heating of the handle.

With the parts assembled as shown in Fig. 2 it will be seen that the inserted end of electrode Il! is clamped with head 1 by screwing home the nipple or handle extension 6. Handle extension or nipple 6 abutting at its inner end coupling socket l1 will cause the latter, together with conductor rod I3 to move as a unit inwardly of the head 1 and toward the left in Fig. 2 to engage rod I3 with the inserted end of electrode l0.

Rod I3 thus cooperates with the end wall of socket portion 9 to secure electrode l0 at substantially right angles to head l, and with recess l2 to secure said electrode at substantially an obtuse or oblique angle to said head.

In Fig. 9 of the 'drawings the cable I6 which is preferably of the conventional strand type has its extremities separated and turned inwardly as indicated at I6. Through the instrumentality of this structure the cable when jammed by the connecting elements thereof will not only tend to spread but will resist axial stress against separation from its connections should they become loosened. l

The head 'l' illustrated in Fig. 10 of the drawings is formed of any suitable material and is provided with portions 9' and I4' and openingll) similar to like portions heretofore referred to, the head being so modified as to p rovide an opening I2 in alignment with the opening l0 to permit the electrode ll to extend therethrough. This structure permits use of an electrode of any length and also adjustment thereof relative to the head.

Having thus described claimed as new is:

An electrode holder including a hollow head having a lateral opening forthe insertion of an electrode, ,a conductor rod slidably mounted in said head and having its forward end adapted to engagev the electrode, a handle screwed into the rear end of said head, a sleeve screwed on the rear end of the rod, said sleeve extending rearwardly of the rod and having a reduced rear end, and a cable passing thro-ugh said handle and the rear end of said sleeve, said cable having an enlarged rorward end lling the wider open part of the sleeve and forced by the sleeve into close contact with the rod, said handle engaging the rear end of the sleeve to force the rod into close contact with the electrode.

the invention what is MICHAEL swEDA.

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