US2572753A

US2572753A - Terminal having lever clamping means to secure a conductor thereto

Info

Publication number: US2572753A
Application number: US60095A
Authority: US
Inventors: Pahal William
Original assignee: LESLIE V W SCHRADER
Current assignee: LESLIE V W SCHRADER
Priority date: 1948-11-15
Filing date: 1948-11-15
Publication date: 1951-10-23
Anticipated expiration: 1968-10-23

Description

Oct. 23, 1951 w. PAHAL TERMINAL HAVING LEVER CLAMPING MEANS TO SECURE A CONDUCTOR 'THERETO Filed Nov. 15, 1948 lllllllllll I u uentor 38 William Pa/m/ Patented Oct. 23, 1951 TERMINAL HAVING LEVERv CLAMPING MEANS TO SECURE N GON-DUCTOR THERETO William; Pahal, East St; Louis, 111., assignor to Leslie .V; Schrader, ,Belleville, Ill.

Application Nbvem'ber 15, 1948, Serial-Nb. 60,09'5- 2 Claimsr This invention comprisesrnovel andiuseful im provements in a detachable electrode: holder: and.

more specifically: pertains to" a novel. clamping means for; electrically rand mechanically securing an: electric conducting cable: to an; electrode:

holder;

The" principal. object. of. this invention; is to' provide? an. improved. clamping. means: for me chanicallyandx. electricallyconnectingan electric cable tman: electrodezhol'der:

The principalafeature; of this: inventionsresides" intprovidingran electrically; conductive sleeve securedt to one: of x the jawsof a substantially. 'con ventional; electrode holder together? with improved; clamping; means. for: mechanically and electrically securing. and electrically conductive cable in: said sleeve;

A. furtherr feature of the; inventioniresides-i in providing onerof. thei-ja-ws ofa ani-electrode holderz' clamp; with a. sleeve, said: sleeve being slottedi; longitudinally of its length to receive' aclamping-i levennsaid; clamping: lever having a cam portion for frictionally and wedgingly engaging the electric conductorof an elect'ric cable; for clamping the same to the interiorsurface: of r the sleeve. in electrically conductive relationtherewith;

A further feature of the invention resides in the provisibnwot a: clamping means for-"an electrode. holder in accordance with the foregoing features; together with an insulating housing I.

longitudinally-r slidable upon said: sleeve. for: re+ taining'thelclamping lever in-itsclamping pcsi-ition,,and for. insulating the,.entire.. surface of the sleeve and lever.

These, togetherwith'zvariousanclllary features and objects of the inventionwhich will laterlbecome" apparent as the following description proceeds, are attainedby this device, .apreferrediembodir'nent-ofwliich has been illustrated byway-of example only in the accompanying drawings, wherein:

Figure 1 is a side elevational view of a conventional electrode holder having the novel cable clamping means applied thereto;

Figure 2 is a side elevational view similar to Figure 1 but a part of the clamping means being indicated in section to show the interior construction thereof, the clamping lever being indicated in dotted lines in its open or releasing position, the insulating housing being omitted from the clamping device;

Figure 3 is a bottom plan view of the arrangement of Figure 2, the clamping lever being shown in its closed position, and with the insulating cover for the clamping device being omitted;

Figure r is a fragmentary-vertical transverse sectional view through the device shown in.

Figure: l

Figure 5-is a vertical trans-verse sectional de tail view taken substantially upon the plane of thesectionline 5--5-of'Figure 2'; and

Figure" 6 isa fragmentary elevational view of" aportion of the insulating housing; forming.- a

part of this-invention.

Referring now more specifically to the accom.-- panying drawings, wherein likenumerals designatesimilar parts throughoutthe various views, it will be: seenthat the; numeral 101' indicates generall a. conventionalform of. electrode holder consisting of upper" and lower jaw members. l2

and M respectively which are pivoted together" for relative movementtowards and from eachother for clamping anelectrode therebetween';

The :upperj aw member is'provided with: an operaating. handle l6; and: a." suitable resilientmeans:-

notlshown; is" receivedwithin ahousing l8 where;-

by the two."- jaws are biased? towards: each. other f for yieldingly clamping an electrode: therebe+ tween. The: lower: jaw l4 isprovided: with an operating: handle. or'shank ill', and it is to this" handle-thatthevclampingdevice ofithiszinvention is to. be: applied.

This clamping" device? preferably; consists: of a m'etallicrsleevev 22 which is immovably secured to the:shank 20. in any' desired: mannenithe: twoends ofsthe sleeve?being 'preferably open; Within the: open outer end iofrthe .sleeve' 2 2 is received aniinsulation'acoveredtelectric cable-24; havingfan electrical'=- conductor." at its center, the. end oi'zi' which is shown;- at 26; this end-being ad'abted' to be oreseen-i701"we. g'ed by a mechanism to besub' senuentlvdescribed?v into: a mechanically secure and" electricallv' efficient. contact with the innerwalls off the? sleeve 22; wherebv current suppliedi b xfthe? cable? 2451mm be transrnitted to: the'lower" jaw I4 013 the electrode holder Ill.

As seen clearly in Figures 2 and 3, the bottom or lower surface of the sleeve 22 is provided with a longitudinally extending slot 28 through any desired nortion of the length of the sleeve, but preferably extending to the outer end thereof. A c amping lever 30. shown in dotted lines in its open osition in Fi ure 2 at 32, is plvotally mounted in the sleeve 22 and is swingable into and out of the slot 28.

This lever, as shown in Figure 5, is mounted between a pair of cylindrical segments 34 and 3G, and is secured thereto as by a pivot pin 38, which extends through apertures 40 in the side wall of the sleeve 22, through the segments 3| 3 and 36, and through the enlarged cam portion 42 of the lever 32.

The

cylindrical segments

34 and 36 thus snugly fit the inside, cylindrical wall of the sleeve 22, embrace the lever portion 42 therebetween, and serve to provide a restricted chamber 44, see Figure 5, in the sleeve 22 for receiving the end portion 26 of the electric cable.

The wedging portion 42 of the lever 32 constitutes a cam, and is preferably provided with a plurality of serrations or teeth 46 which as shown in full lines in Figure 2 are adapted to be wedged into the sides of the terminal portion 26 of the cable, for tightly gripping the same, and establishing an electrical contact therewith.

It will now be seen that when the cable has been inserted into the open sleeve 22, the lever 30 being in its dotted line open position 32, the lever may then be pressed inward to its closed position as indicated by the arrow 48, whereby the teeth or serrations 46 of the cam portion 42 of the lever will tightly grip and retain the cable.

In order to properly insulate the clamping device, and retain the lever in its closed position, there is provided an insulating housing 56 which is preferably in the form of a sleeve or bushing of suitable insulating material, and which is longitudinally slidable upon the sleeve 22 from the cable end thereof. This bushing, as shown in Figures 1 and 4, is adapted to substantially snugly embrace the sleeve 22, and lever 39 when the latter is in its closed position, thereby preventing opening of the lever, and releasing of its electrio and mechanical connection with the cable 24.

The outer end of lever 30 has a depending flange 52 and the end of the bushing 50 is radially notched or slotted at 54 to receive the flange therein. Thus the pull of the cable 24 on the toothed end 42 will tend to urge the lever to its open position whereby the flange 52 will be retained in slot 54. By this means, the lever holds the insulator in position, while the latter insulate's and retains the lever in closed position.

From the foregoing, the construction and operation of the device will be readil understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the art after a consideration of the foregoing specification and accompanying drawings, it is not desired to limit the invention to the exactconstruction shown and described, but all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

Having thus disclosed and described the invention-,what is claimed as new is as follows:

1; An electrical connector for use with an electrode holder comprising, an elongated -electrically conductive sleeve for receiving an insulated conductor in one end thereof, said sleeve having a longitudinally extending slot therein, a pair of cylindrical segments disposed in the sleeve in spaced relation to said one end of the sleeve and in spaced and opposed relation to each other, a clamping lever normally extending longitudinally of the sleeve and disposed in the slot, a wedge portion on the lever adjacent one end thereof slidably projecting into the space between the segments to clamp the bared end of a conductor, a pivot pin extending through the sleeve, the segments and the wedge portion so that the lever may be swung outwardly from the sleeve to partially withdraw the wedge portion from between the segments, and an elongated removable electrical insulating hand grip surrounding the sleeve and retaining the lever against outward swinging movement.

2. An electrical connector for use with an electrode holder comprising, an elongated electrically conductive sleeve for receiving an insulated conductor in one end thereof, said sleeve having a longitudinally extending slot therein, a pair of cylindrical segments disposed in the sleeve in spaced relation to said one end of the sleeve and in spaced and opposed relation to each other, a clamping lever normall extending longitudinally of the sleeve and disposed in the slot, a wedge portion on the lever adjacent'one end thereof slidably projecting into the space between the segments to clamp the bared end of a conductor, a pivot pin extending through the sleeve, the segments and the wedge portion so that the lever may be swung outwardly from the sleeve to partially withdraw the wedge portion from between the segments, a removable electrical insulating hand grip surrounding the sleeve and the lever to retain the latter against outward pivotal movement, a flange on the other end of the lever that extends radially outwardly from the sleeve, said grip having a recess therein receiving the flange.

' WILLIAM PAHAL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,666,991 Cohen Apr. 24, 1928' 1,935,061 Richards NOV. 14, 1933 2,279,508 Bergan Apr. 14, 1942 2,404,437 Donnelly July 23, 1946 FOREIGN PATENTS Number Country Date 26,663 Great Britain Oct. 3, 1907 432,272 Germany Aug. 3, 1926 609,472 France Aug. 16, 1926