US 2644142 A
Description (OCR text may contain errors)
June 30, 1953 c. A. DANBERG 2,644,142
ELECTRIC TERMINAL CLAMP Filed March 16, 1950 2 Sheets-Sheet 1 INVENTOR. CHARLES A.DA/VBER6 June 30, 1953 c. A. DANBERG 2,644,142
ELECTRIC TERMINAL CLAMP I 2 Sheets-Sheet 2 Filed March 16, 1950 F/GI 6 4a 4/ I 36 .37 I
Q K 42 H----4s INVENTOR. CHARLES ADANBERG BY I ATTX
Patented June 30, 1953 G. A. Danberg, Inc., Berlin, Conn, a corporation of Connecticut 7 7 Application mam, 1950, Serial No. 149.9
' This invention relates to clamps for electrically connecting cables to the terminals of electrical apparatus such as batteries-welding. apparatus, and to other conductive objects, and more par= ticularly to a clamp of the boosterF-type and whichhas spring-pressed jaws for grippinglthe object with which electrical contact is tofbe made. 5
One object of this invention is to provide a clamp of the above nature in which the'j'aws areprovide'd with a plurality of pairs of "opposite toothed clamping recesses or surfaces formed on axes which extend indifferent directions, whereby the clamp may selectively grip nuts, cables and battery posts of difierent shapes and may be efficiently used in 'awkward' or poorly accessible locations. 1. 1. r 'Aiurther object is to provide a clamp of the above nature which will be simple in construction, inexpensive to manufacture, easy to apply Referringnow to the drawings, in which'like reference numerals denote corresponding parts 'tliroughdl'it 'th'e several views, the first form of clamp 'is indicated generally by the numeral. I 0, andicomprises" a pair of complementary sections II, [2, which are swingablyconnected attheir central portions by means'of a pivot pin I3.
' The clamp se'ctions I I, I2, comprises respective forwardly extending jaws l4, |5,jand rearwardly extending curved handle portions Ni, H, the latter being integrally provided with-a pair of opposite inwardly extending studs" l8, I9, "for 'reta'ining a coil spring under'compression between said handle portions [6,113 whereby the jaws 14,15 will. be urged together at all times.-v
I The'clam'p sections .l I, I2 aremade of any suit- 7 able electrically conductive material; such as cast and manipulate, compact, ornamental in appearance and very efiicient and durable inuse; With these and other objects j in view,'there have been illustrated on the accompanying drawe ingstwo forms in which the invention may conveniently be embodied inv practice. xl'nthedrawing, Fig. 1 is a side view of one form of the improved booster clamp, showing one way in which abattery terminal may be gripped therein.
Fig. 2 is a fragmentary side'view of 'thes'ame showing the jaws as viewed from a directi'on'opposite to that of Fig. 1.
Fig.3 is an edge view of the sameshowing the jaws as they would appear when viewed from the lines 33 of Figs. 1 and 2, and also showing one way inwhich a sheet metal object maybe gripped therein} I H Fig. 4 is an end view showingjthe jawsaszthey would appear when .viewed from'the'lines 4+4 of Figs. 1 and 2. Fig. dis a fragmentary perspective view showing one of the jaws of the first form of the inventiorr' Fig. 6 is a fragmentary side view,;showing jaw portions .of a second form of clamp embodying the invention. Fig. '7 is an edge View of the same asIit would appear when viewed from the line 1-1 of Fig. 6', showing-one way in which a batteryxterminal maybe gripped therein; "1;
Fig. |8 is an end view of they same showing the jaws as they would appear from the line 8-.8 f of Fig.6. f
Fig. 9 is a perspective view of one of the jaws of the second form of the invention.
brass, bronze, 'or other acid resistant alloy: The rear end of the handle portion i! ispreferably provided with an' apertured lug 2|. having a set screw 22 therein for connecting the end of, a cable totheclampilllu" v The 'jaws I49! 5 are provided intermediatejthe lengths thereof with respective inwardlyienlarged portions 23, 24 having a pairoi opposed recesses 25, 251' which are formed on an axis extending longitudinally of the jaws l4, l5, andwhichare longitudinally toothed. v
Qutwardly of the enlarged portions 23, 24 the jaws J4, 15, are provided with another pairoi opposed recesses 26, 2.6 which are also toothed, andare formed on'anaxis extending longitudinallyiof said "jaws, said recesses opening out wardly through the" ends of said jaws. It will be noted, however,.that the recesses 26 are oiiset outwardly of the recesses 26 are adapted to 'define a gripping openingwhi issomewhatlarger than the opening, definj the recesses 25. In'ord er'to. adapt'the jaws M, I5 to' grip'an object sucl'ras a batterypost, a cable or a sheet nietal a'rticle which vextends,laterally of. said jaws, the end portions thereoffare provided with pairs of. longitudinally, extending toothed ridges 12 l 2 I whichar disposed vat oppo'sitesides of there cesses 26.;
, end portions ..of the" jaws. l4, [5 are also integrallyprovided'with a pair of laterally-ex tendingopposed claws 28, ZQ-having a pair of opposed toothed recesses 313,130- extending witha tapered formation cross-wise thereof,- or mother words, in'a direction longitudinally of the'jaws l4;' I5.:-
The .extremeiends: of the claws 2,8, 29fiorm toothed ridges 3|, 3| which are approximately parallel to the ridges 21 and are adapted to coact 25,;whereby the recesses Operation of first form In operation, the handles l6, l1 will first be manually compressed to open-,the jaws; 14,- so 1 that they may be applied over the object to be clamped and then released. As shown in Fig- 1, an upstanding battery terminal T may be clamped in the opposed end. recesses 26 by :thezactionof the coil spring 20. r 3 I If the terminal T is so located thatthe clamp I0 must be applied'to it-in:an ofisetpositiongthe pair of recesses in the claws 2.8;:29;may:be
used to grip the terminal. r x -.i ii
If the terminal T is in such a location that the clamp I 0 must :be applied atrightangleszithereto. said terminal may be grippedbetweenthe toothed ridges 21 of the respectivejaws 114,115. oralternatively, if the clamp 10-must-be ofiset irraright angular relationship. tosaid terminal; it maybe gripped between the ridges3l 0f said claws; c If it is desired to apply the clamp 'lllito asheet metal or other thin member such-:as: the render of a motor vehicle, this: maybe doneingthe manner illustrated in Fig: 3, :whereima fender gripped between the toothedaridges3l; :Alternaiti-vely, the clamp 10 may be. disposed'in a horizontal position so as. to grip the object between'the pairs of'ridges 21.- 1". i Thus it will be seen that the clamp I0 may be used for 'efilciently establishing and; maintaining electrical contact with objects; of:a wide yariety of shapes and sizes, and will operate. properly when applied at various. angles "to the. object. to be gripped. 1 17- Second fo'rm meral 32 indicates generally asecond form of the clamp embodyingthe invention, said clamp havinga modified jaw formation but, in othenrespects having the same construction as. thefirst formof clamp l0 described above. .1. As shown, the clamp, 32 comprises a pair of opposed complementary sections 33, 34, which are swingably joined by a pivot pin 35', and which comprise forwardly extending jaws 36, 31, and rearwardlyeextending curved handle portions .38, 39
,The outer end portions of the jaws 3B, 31 are curved inwardly so, as to. terminatein respective opposed laterally-extending ridges40, 4 Land are provided with laterally-toothed concave gripping recesses 42, 43 inwardly of said ridges. Adjacent the recesses 42, 43, the jaws 36, 31 are integrally provided with respective opposed laterallyextend; ing claws 44, 45. having concave inner toothed recesses 46, 41, which are formed on anofiset axis extending longitudinally of the jaws36, 31. i
At the opposite edges of the recesses 46, 41, the respective claws 44, 45 are formedwithpairsof ridges 48, 49 which extend in a direction longitudinally of the jaws 3B, 31 and which-are trans- 4 versely toothed, whereby the second form of clamp 32 will be adapted to firmly grip thin fiat objects. Operation of second form In use, the laterally extending claws 44, of the second form of the invention will be found particularlyadapted for clamping aniupstanding be grippedinthe recesses 42, 43 of the jaws 36, 31.
The two' pairs of ridges 48, 49 will be found useful for gripping either a'battery terminal, cable ora sheet metal object extending in a directiontransverse to the jaws 36, 31, while the :end-.ridges.40,..4.-I. will be useful for gripping objects of various shapes which are disposed in locations which are diflicult of access. I
While there have been disclosed in this specification twoforms in whiclr'theinventiontmay bezembodied: it is to be iunderstood that-these forms are. shown for the purpose-of illustration only, and that the-invention is: not to be limited to thespecific disclosures, but may be modified and embodied in various other forms-without .dee' parting from its'spirit; .In. short,.1theiinvention includes all of the modifications and embodiments coming within thesscope .of-the following claims. :Having thus fully described theinventiomyvhat is claimed asrnew,xand-jor whichxit is desired-to secureLettersPatentis: r. T p ::s;: t?
*1. -.In an electric battery terminal clamp, a pair of levers pivoted together between theirLendsin plier-like fashion; each of:said;leverss.having an elongated handleat one end] and aworlceengaging jaw at its otherend, a strong spring locatedfibe tween said handlersections for pressing Saidzjaws together, said jaws having concave longitudinally; toothed end clampingsectionsand longitudinallytoothed intermediate ridges inwardlyeoffsetirom said end clamping sections to r'engage irregular electric terminals-and oneof said handlezm'embers'havinga cable connecting member;
' 2. An electric battery terminal'clampas defined in claim 1, in which saidendworkeengagirig'iaws are also provided with laterallyi toothed :concave sections on. both sides of said longitudinallytoothed sections; e
3. An electric battery terminal clamp as defined in claim 1, in which provision is made of a pair ofopposed claws integral withsaid jaws and extending laterally therefrom, :each' .ofjsaid claws .having concave longitudinally-toothed work-engaging sections. 1 I 4. 'An electric battery terminal clamp as de-" fined in claim 1, in which provision is made off-a pair of opposed claws integral with said jaws and extending'laterally therefrom, each of said claws work-'1 engaging sections. 4 CHARLES A. DANBERG; References Cited in the file of this past UNITED sur es- ATEN S 4 -Date Number Name 721,480 Van Schott Feb. 24,1903 968,425 Dusinberre July 5, 1910 1,301,347 Williams Apr., 22,1919 1,492,657 Walker .May 6., 1924 1,521,197 Lewis Dec. 30, 1924' 1,775,335 Wiggins i Sept. 9, 1930 2,071,897 7 'Pazzano Feb. 23, 1937