US1443798A - Welder's tongs - Google Patents

Description

Jan. 30, 1923.

, 1,443,798. R. MAmcE.

WELDER'S TONGS. msn muli. 192x. 2 sains-sneu :4

.15- 'the electrode is Patented Jan. 30, 1923.

noter. aumen, or rmsnvim'xn 'miriam 'nimma nnpunew'rmniy r, i921. sei-ui ire; esima.

To all edwin. it

, Be it lmowxlhet I5 Roni. 'MA1-rien, Si

citizen of die,United-,SeiA meaning Philadelphia, in the county trlhilldelplia State of Pennsylvemigand .Welders Tongs, of 'which the followingis aapecilcation.. The present invention has todo with-certain im rovementain Welders to' which are useiiJ for conduct and delivering the electrical current toi-ge electrode need in en electric wel operation. These ton s are provided with jawsfby means of whic.

Inithepe'st it has been the almost-universel. custom to attach the. electric cablles directly to auch jews and et e point in advance of the handle grip. Theseelectric cables areA nerally flexible, but owing to themegnitu .of the current used, it is necessary to use/such a la cable thatl it cen be conveniently attinrzlied directly to the hws; butfwhen so attached it is liable to me brokenowi to the constant bending,V seriousl interferes with the convenient munipu ation of the tongs during the weldl i otherwise such Furthermore,

in .operation ne of the ob'ects of the tion' is to provi e s onstru the electric cable may be'iittached to 'the tong nt a point beckof the handle grip, the \currnt being,I then conducted' f pest or through the handle grip to the jaws them selves.. When 'this a ment and forni of tongs is provided itjmay be vvery easily 4und conveniently manipulated, so that the quality of the work mit)r be much improved. Owing to the magnitude of the electric current which is used during 'the welding operation1 it is ynecessary to employ a reletively large conductor for carrying the ciirrent through or past the handle grip as conductor would 'become overliented. In fact even when using u conductor of relatively large size a con- 'sideriible amount of heat `js generated.

resent nventhe conductor in that portion adjacent to the handle grip itself, so'asto protect the operator from electric shock. 4In ome cas I form the handle grip itself of heat insulating material so thiit it serves-the double function of protecting-the operator against shock, and also against burning by heet.

Another feature of the invention in this the flow o lieve @invented certain new and useful .Improvements in unifierY which il iymeims ofa.'

ion in which.

A4--4 of Fig. 3 looking` it is very desirable to insulate connection has todo' witli'the provision of 'that :they: willhandle ofv such form'- very re'a il dissil'mte the heet -generated by l currentthrough 'the conducting portion. For :this iii-pone, I 4sometimes Hrovide the insulatingI material` o'f the andle grip with slots or openings allowing theV eirculationof cir' directlytothe electrical conductoritself;`

@ther objects and 'uses of the invention will'appearfrom e tletiiiled description of the same, whichlconsists iir the features ofV construction und combinations of parts here:

iniift'er desoriliedaiiidohiimed. l*

, In the drawings;

1 shows;` a' ion' tudinnlsection through a pair of tongsein oilyinp; the'A features of the preseht'invention, said tongs including a will' o'npivotedmernbers which provide` jaws' for clampingr the electode' 'of the arroiis';

Fig. 3 showsv n longitudinal section through'- another' forni of tongs provided withA a single' handle member {miiof--jaws which iiiuy be drewnto her suitable clamping ievice:

Fig. 4 shows a fragmentary face View of the' clamping device o one o 'the jaws of tlie'tongs of Fig. 3, being taken on the ,line in thedirection of the arrows;' A J Fig. 5' shows n cross section teken on the line 5 5 of Figx. looking in the direction o'f the arrows; und

Eig. G shows a crosigeection Cuk'en on the carrying' a showsa cross section taken on'tlie 4 :soA

line 6-6 of Fig. inlooklng in the direction of the arrows. y

Referring irst to the arrangement shown in Figs. 1' und 2, the vseme includes a. pair o members 7-end 8.' These members iucludethe which a're'of relativelyY large cross section us shown in Fig. 2,- su cient in fact to carry the large currents necessary without mete rial overheating.

The conductingelements 9 and 10 are pivoted together at the point 11 and their end portions provide the co'operuting jaws 12 and 13. The inner fece of the jawylB is provided with a. lining 14 held'innlece by -means of the screws l5, lseid lining being of conducting metal, but may be renewed from damage by burning.

replaceableso that it conducting elements ilV und l0' time to timen'n case'of 1 IThe lower ends of thel conducti inembers 9 and l0 terminate inlthe con noting lugs 16 and 17 res 'rely to'which-may be attached the terminals 1R .and 9 by means of wing nutsl or the like 20 and l.

The current from the oonnecton'z 181ml inflows directly through the elemente 9 and l0 to the jaws. Thse elements 9 and l0 are protected b v means of heat and elec tricnllyrinsnlating covers 22a`nd 23 which constitute the handle'grips.v Inorder. to facilitate thev ventilation of the conducting elements 9 und 10, I prefer to formthcm with irregular surfaces is shown in Fi 2*.' so as to establish the air pessaplesrlt w ,'ch

xnaterinlly facilitate the ventilation and-consequent tooling of Vthe condnctl of the conducting elements illnctrated is of rlmnnelhapedV cwss section and thnt a spring member 25 has its end portions 26 and 27 seated in the channels o Tile inner surfaces of the conduct' members Si and 10 are also exposed to the cooling intim-nce of the freely circulating air.

In tl\e constructionshown in Fi 3, '4, and 6, there is bnl: one single ,re atively large conducting element 28. to the lower end 2li of which muy be renmvubivuttuched a connector 30 by means. of the bolt Fill.A The -i-unducting element 28 at its inner end cnrries the jaws 32 ad 83 which are securetlto it by means of u through boit 84, the jaws normally tending to separnte from 'each other by renson of their spl-1n? quality.4 A wing nut 85 is provided on tie cross 36 for forcing together the end portions 37 and 38 of the jaws.- These end portions may bc provided with the chnnneha or serretions 39 ne illnstrnted in 4.

The handle portion o f is construction includes the semi-circular heat nod electri cally insulating members 40 end 41, drawn together intheucentral portions by means of cross bolt 42. These msnlating members 40 and 41 are preferably formed on o smaller curvature than the. cnrreture ofthe conducting element 28, so as to establish the air Jms'soges 43 and M which extend'longitndmally through the tongs and serve to effectively ventilata the adlacentportlons of the element 28. I also prefer to cause the Vmembers 40 und .other as Vellown `said handle portion.

elements. l It will also he obeerved from Fig. that each' themem-f., bei-s 9 ed 10. tending to force snidmemhers apart ond thus bring the jaws together. ,tricaily conducting materiel havi nuages 41 nto stop short'of each nrtic'nlarl' in Fi'.. 5 and 6, eo ne to estab ish the adidilona air pas- Sas and 46 therein illustrated..

hllc I here shown und described only c ertaln cmbodnnents of' my present inventiornetill it will he observed that in eachose theeelertrcall)Y conducting member consti tutes a portion of the handle of the device; that the-electric cable' is u'dapted ,to bevattached to said ronductinglmember beyond so thatlthecnrrent flows tlu'ough the handle portion; that the handle portion itselfis provided witli heat. and electrically 'insulating grips; und that the entire al'un electrically conc noting ventilgted and therebyr I claim:

A device -for 'ppin and holdi -electrodes for electa-gill*l welding' comprtr'lgn e pgiir of companion meznbc'ersi eo'chof w :ich consists ofan elongated metallic bar of elecet one end a flattened connector element e opted to receive' a ile'ttened cable terminal, and hav ing nl: its other end a flattened jaw for'eleccooled.

-trlcal contact with an electrode member, all

of said parte for each of said contacting members being integrally formed' from its termine] connector to its jaw' whereby electric current lmuy flow tlirongli said member from the terminal connector tothe jaw with consequent.

a minimum ot resistance und heating. the contacting` members being rovided ywith co-operating proections ont ieir adjacent faces adjacent to t otnl connection between the rejections of the two members, the two mem rs'beingr engolarly formed with respect to each other whereby when their jaws are in tint contact their .body portions are separated at' the other side o said pivotal connecti a U- sha d spring between scid body rtions ten ing to seperate them to there torce the jaws towards .each other, :and e handle gripof hectic-nd electrically insulating nmterml mounted on each of sind y portions, there h eng passages -for the tree circulation of airbetween each bod. portion and the handle grip thereon, su stantinll?7 as described.

ROYALY M'ATTICE.

'ementis so formed thettht member is effen-tively Uli

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