US1041300A - Cable-clamp. - Google Patents

Description

J. H. KLIEGL.

CABLE CLAMP.

APPLICATION FILED 111111.15, 1911.

1,04;1,300, Patented 0ct.15,1912.

$3 {Latte 1mm v j T was :1; or, .1: T.

r allwhom'itmoy cor-c q Be it known that I, Jo H N 'H: "Knmorl, a citizen of the United States,"residin' 'at;

New ork, 'in the county-ands'tateof ewj .5 York, have invented'certain new and useful Improvements in Cable-Clamps, of whlch the following is a full, clear, and exact dea clamp for a plug in which, the insulation at the ends of -the conductors-shall be efs fectively' protected, so as to prevent myel ing, undue wear, or other injury thereto.

Another object of myinvention is to providejan improved clamp so that-thec0nnections of the conductors-and contactsshall berelieved substantially of all strain, such for example-as might-otherwise be exerted on such connections when the cables are- -grasped and pulled to withdraw the plug from the device into which it has been inserted or where, as in stage connectors, it is promiscuously thrown about in: setting up and handling. the scenery..

A still further object is to provide aclamp for a cable whereby all strain upon the plug itself in clamping the cablethereinis avoid ed which permits the use of plugs that are fragile in character and incapable of with standing any degree of strain; f

Another, and very important feature or object of my invention is to provide a clamp for devices of this kind which will allow'the use of cables of difierent sizes to be used in 5 the same plug, junction box, etc.

Other objects of my invention are to provide a clamp of'this character which shall be simple and compact, and capable of being easily and quickly attached to the cables;

One embodiment of the present invention is disclosed in the structure illustrated in the accompanying drawings, i-nwhich like characters of referemc denote correspond-- ing parts in all the vic\,vs..ai-id in which- 'Figurc 1 is a side view of my improved device shown In connection with a plug embledl form. Fig. 1.

form of clamp. V I

Referring to the drawing detail '1 3 deg. ignates'; the body 3 of a plug in, connection with which, Iv have chosen jto represent my device, said. plug being made pf; theeusual .insulatingmaterial. The body 1: has ahead 2 prefierably integral therewith and-{of the same material, ,the body and the head being substantially of rectangular .c'rosesection.

3 .largejenough to receive the v'endgotf the conduct9r ;-to whichthe' plug is-attached, in the present; instance a cable 4', containing two conductors,;5.and 6. Theinsulation at the end of. the-cable is -inclosed, aswillmore Extending downwardly and laterally from the socket 3.-jarepassages 7, 8 opening preferably at the shoulders 9 and 101at the-base of'the topor-head portion The conductors 5 and 6 arereceived by-these passages and .when. inserted through these passages they areconnected to the; contacts '11 and 12 ,throngh'the. instrumentality of the socketenough to permit the terminal members to be passed therethrough from-the socket 3, so that-the terminal members maybe attached to their conductors first, and the latter-then inserted into the plugs through said passages.

socket as well as the terminal members and contacts the upper portion of" the head is cut awayon both sides a sufiicientdepth" to expose the cable in the socket, the socket, as understood,- being large enough to re uscd'with the particular form of plug. By cutting away both sides of the top, as shown, there result-s ahead having two upwardi protruding ncmbersor projections 15 and 16. These protruding members are perforated as shown atlfand 18 adapted to receive internally screw-threaded .-"extensions or members 19 and "-20 on clamp '21. I This In the'tpp crhead 2. is an aperture or socket For-"the purpose of binding the cable firmly in the socket 3 'to"eliminate all strain upon the conductors '5 and 6 below the ceive the maximum .size of the cable .to be 105 tilf'E 1 away di h s fully appear. later, in the top 0f '-t-h plug and sqprotected from'raveling or other ined terminal members 13 and 14 as shown. Preferably the. passages are. niade' large clamp is provided-with suitable clamping ribs 22 which bite into the cable whenthe clamping is being perfected; A corresponding c amp 23 is ocated on the opposite side provided with male members 24 and 25 adapted to engage the internal screwthreads or membersl9 and' 20. It is obvious that the cable could be clampedwithout the use of the internally screw-threaded mem- 10 bers but their use-not only makes the clamp a more efiicient one theoretically but-also from a ractical and commercial point of view. y their use-it will be notedthat whether a large or small cable be'used the male members 24 and 25 .never project beyond the clamping member21 and with 'the same male members a larger cable j'can ,be clamped, the said members then en ging with therthreads'of the extensions. 11 additibn to the above advanta es it will be obt 4 served that-the extensions acilitate the assembling of the clamping members 21 and 23.

The ribs 22 on the respective clamps may be of" any desiredsize or she. e. Toobtain the best results however the ength' of said ribs should be slightly less than the distance between the protruding'members 15 and 16 so as to efiecti-vely clamp a small cable, for instance, a cable whose diameter is equal to or is less than the thickness of the protrudin members or projections 15 and 16. See *ig. 3 for this construction.

n will be observed from the foregoing that many advantages are obtained by this invention which, so faras I am aware have never been touched upon before. All clamps for a similar purpose which have been evolved heretofore are incapable of clamping more than one size of cable. With this be clamped.

device,'in its referred form, three sizes can or instance cables whose sizes range from No. 6 to No. 14 can be clam e plug, it bein understood as be ore stated, that the s et 3 is made for the maximum size of cable to beusedJIf a lar r number of cable is to be used, it will be own by 311' electricians, that it is then necessarv to use a lar r plug, and, a converao, i a smaller cab e is to be used than those above mentioned a smaller plug should also be used. However thedevice shownand described is capable of clamping the smallest known cable .for then it is only necessary to so enlarge the ribs on the clam s that when the latter are assembled the istance between the respective ribs will be less than the .diar'neter of the cable. Again when it is desired to use a larger ca le (if the socket 3 will permit it). it will only be necessary to lengthen the screws 24 and 25.

It will also be apparent from the foregoing that the cable canbe clamped as tight as desired between the clamping members 21 and 23 without putting any strain upon the avln'g open sides and protrudin insulating material. At'most there will be nothing more thana longitudinal pull upon the projections 15 and 16. For this reason a less tenacious andaless expensive insulating substancc'nan be used without any danger of s I littin or rupturing the same.

. The evice herein specifically described,

as before stated, is capable of being used in other relations'aud is not limited in its field of usefulness to a switch plug. Moreover the specific device herein described is merely the preferred embodiment of my invention,

and may be'embodied in various other spe-l cific forms without departure from its' proper scope as defined. in the following claims. f 4 I v In Fig. 5 a slight modification of clamp 21 is shown. Sockets 26 (only one shown) are provided therein for the purpose of re ceivin the riveted heads 27 (onlv one shown so as to prevent the removal of parts and consequent loss of the same.

What I'claim is:

1'. In a cable clam'p a member provided 1 with a"so'cket therein adapted to receive a cable," means projecting outwardly therefrom, clampingf rnembers for the cable mounted on the opposite sides of the. projecting means and means on the clamp ng members cooperating with said'project-lng .members located between the clamps having perforations therein, and means passing through said perforations and adapted to bind the clampin members upon the cable.

4. In a cab e with a socket therein adapted to receive a cable, ed es protruding outwardly from said socket, c amping members mounted on the opposite sides of the protruding edges, and means cooperating with said edges for clamplilpg the cable.

clamp, a. member provided lates extending across t e open a cable clamp, in combination, a I

member provided with a socket therein adapted to receive a cable, protruding edges havmg perforationstherein, clamping members mounted on the opposite sides of the protruding edges, and means onsaid clampmg members extending througilsaid pertorations for clamping said ca 6. In a cable'clam'p, in combination, a

threaded extensions enterin member provided with a socket therein having perforations therein, a ribbed clamping member mounted in one of the side openings and having internally screwthe perforations in the projecting e ges, a ribbed clamping member mounted in the other side opening, and having male members extending therethrough and engaging the screwthreads of the extensions whereby the cableis clamped in the socket.

7. In a cable clamp, in'combination, a member provided with a socket therein adapted to receive a cable, said socket provided with open sides and projecting edges having perforations therein, a ribbed clamping member mounted in one of the side openings and having extensions entering the perforations, perforations extending through said extensions and the flange, a part of said perforation being screw-threaded and a part enlarged beyond the screw-threads, and

a ribbed clamping member mounted in the other side openmggwand having screwthreaded male members extending through the'same and engaging the serew-threads'of the secondmentioned perforations said male members having riveted heads thereon adapted to enter the enlarged part of the said second mentioned perforations.

In testimony whereof I aflix my signature in the presence of two subscribing witnesses.

JOHN H. KLIEGL.-

Witnesses:

M. Lnwson DYER, W'M. BOHLEBER.

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