US1761728A - Metallic electrode holder - Google Patents

Description

une 3, E939.

H. H. HECKMAN METALLIC ELECTRODE HOLDER Filed Nov'. 19, 1926 2 Sheets-Sheetl l l INVENTOR. l I

Vx B ATTORNEY.

June 3, 1930. H. H. Hx-:cKMAN 197619723 METALLIC ELECTRODE HOLDER- 2 Sheets-Sheet 2 Filed Nov. 19, 1926 Patented ma@ s. r'ieee narran rll`he present invention relates to electrode holders for electric weldingand particularly to holders adapted to hold firmly but release quickly the metal rod used `for supplying metal to the operation.

Heretofore, electrode holders of this type have been made but most of them are open to the objections of expense, complexity, diculty in manipulating to release the stub end of the electrode, heating due to the resistance of the materials used, danger to the operator due to exposed conductors and others. Among the objects of vthe present invention is to overcome most or all of these objections and produce a holder that will be economical and easy/ to produce and assemble.

Another object is an electrode iirmly and yet easily release it when necessary or desirable.

Another object is an electrode holder that will have suflicien't current carrying capacity i so it will not heat.

vStill another object is a holder ink which the danger of contact of the hand of the user with live partsis minimized.

With these and other obj ects in view as will readily appear to those skilled in the art the invention consists in the device' as illustrated in the accompanying drawings and insuch inoditications and alterations therein as come within the scope of claims.

Referring to the drawings, l Fig. 1 is a longitudinal sectionfthrough the holder Fig. 2 isa top view of the same; Fig. 3 is a section on line 3--3 of Fig. 1; Fig. 4 is a top plan/view of a modified form of the holder;

l' Fig. 5 is a longitudinal vertical section therethrough;

Fig. 6 is a section on line 6-6 of Fig. 5;

Fig.f7 is a section on line 7 7 vof Fig. v5.

The devlce consists broadly of a pair ot spring pressed.- aws,

HMIER E. BECKMAN, @F DETROITLMICIHGN TETALUC ELECTRODE HOLER a holder that will hold removed.

the hereunto appended aan trode` (not shown) is held, a handle, and means tor separating the jaws.-

One of the jaws consists of abar of copper 10 extending from the front end 11 of the device' through to the rear end of the handle 53 12. rlhe'greater portion of this number consists of a lat sort of trowel shaped piece, being fairly wide outside of the handle 12, narrowing somewhat toward end 11 and tapering l quite sharply into the front end ot handle 12 55- so as to position the member in the opening in the handle. lt Cmay be and preferably is prop vided with 'a stitening rib 13 for a portion of its length. rlhe part of member 1() within handle 12 is somewhat smaller than the part 50y outside but should be sufficiently large to conduct .the required current without heating.

'lhe rear end ot member 10 is formed into a socket 14 provided with ribs 15 on its outer surface and threaded internally to receive the correspondingly threaded ynipple 16 provided on the end of cable 17. This nipple 16 may be a short tube of :metal soldered orl otherwise secured to short portion of the cable 17 trom which the insulation `has been 70 rlfhe other jaw 20 consists of a flat piece of. steel of about the shape of the upper surface of member 10 -but somewhat longer to provide an upward bend 21 as indicated. This bent 75 portion is slotted as at 22 and extends into handle 12 to thetront end of socket 14 which is undercut'as at 23 to receive the end of member20. lt is preferred to place between 'the members 2O and 10, from the rear end to the se bent portipn of member 20, a thin sheet of insulating material such as mica 24. v l ,The parts 10 and 20 with the mica are preferably secured together by a bolt 30 near the I front end of the handle 12 as shown. L' 85 The slot-22 is. provided 'for vthe passage between ,which ,ther electhere through of a lever 35, ber10 as at 36 and extending to near the front end of bend 21. The free end' of lever 35 is provided with an insulating sleeve. 37 and 90 pivoted on memextends back over handle 12 for tance.

Handle 12 is preferably of hard insulating material bored lengthwise as indicated. The greater portion of this bore should be .large enough to pass socket 14 and ribs 15 but at the rear end should be smaller so that it may b-e breached to provide grooves for ribs 15. These ribs and grooves serve to prevent turning of the parts within handle 12 when putting in or taking out of nipple 16.

In the use of the device, after nipple 16 attached to cable 17 has been screwed into place it may be and preferably is covered with insulating tape to prevent accidental contact of the operators hands therewith.

ln the construction shown, it is preferred to leave open the space l0 above the members 10 an-d 20 in handle 12 to permit free circu lation of air in the handle.

ln the modified form of the device as shown Figs. l to 7; the jaw member 110 extends a short disinto but not through handle 112, and at its rear end is 99 providing means for attachment, through screw 98, of the copper thimble 97 soldered to the end of cable 96. Thimble 97 is of such length that the insulation extends into handle 112 wh-en the connection is made.

provided with atransverse groovey section to conduct without material heating lthe welding current and adapted to be conrllhe rear end of member 11() is preferably i of circular section as is also the'thimble 97 and both members of such size as to fit snugly within ribs 94 formed within handle 112, thus providing air spaces 93.

As indicated in Fig. 5, the rear end of jaw member 120 does not extend through to the rear end. of handle 112 but only aA short distance within the front end to a shoulder 92 on member 110. rlhe rear portion of member 120 will there be secured to member 116 by means of the screw 121 and bolt 122, a strip 1 of mica 123 or other'heat resisting material being interposed if desired.

As indicated, the front end of handle 112 maybe recessed as at'118 toaccommodate the rezr end of member 120 and the head of screw 12 As in the first described form, member this may extend to the front end of member 110 as shown.

Having new described the invention and the preferred forms of embodiment thereof,

it should be noted that the said invention is not to be limited to the specific details herein set forth and illustrated but only by the scope .of the claims which follow. l

I claim 1. An electrode holder for electric weldwill be provided with a stii'ening rib 1111 and ing comprising a tubular handle of insulating material, a pair of metallic jaw members secured together with insulating material between and extending into said handle, one of said members being composed of metal of' high conductivity and sufficiently large cross

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