US902235A - Cable-tip. - Google Patents

Description

L. KELLNER.

GABLE TIP.

APPLICATION FILED NOV. 11, 1907.

902,235. Patented 001;. 27, 1908.

) tain a conducting e oiency proportlonal to UNITED sTATEs PATENT OFFICE.

LOUIS KELLNER, OF NEW YORK, N. Y., ASSIGNOR TOMETROPOLITAN SWITCHBOARD CO.,

A CORPORATION OF NEW JERSEY:

CABLE-TIP.

To all whom it may concern:

Be it known that I, Louis KELLNER, a citizen of the United States, residing at the city of New York, in the borough of Brooklyn and State of New York, have invented certain new and useful Improvements in Cable Tips, of which the following is a fulf, clear, and exact description.

My invention relates to a form of terminal fastening or connection for electric cables,

articularly for cables of large current carrymg capacity at switchboards, electric generators, bus bars and distribution centers; al-

though the invention is not limited to these ce1ve any desired fastening olts or devices,

USES.

In ordinary practice cables are made stranded, 'andvit is evident that an efiicient terminal connection or cable tip must engage the lar est possible number of strands, and with a igh'degree of ressure in order to obthe rest of the circuit. Of course an efiicient electrical connection can always be made by solder, but this renders the fastening absolutely permanent, which is frequently disadvantageous, and is a matter of considerable trouble and expense in any case.

It is the purpose of my present invention to provide a terminal connection or cable tip which is readily detachable or capable-of disconnection whenever desired, and which secures an efiiciency of both mechanical and electrical connection adequate to all purposes for any particular cable or conductor. With these objects in view the invention consists in the features of construction and combination as hereinafter set forth and claimed.

In the drawings: Fi ure 1 is a sectional view of an electric cab e and terminal/connection therefor embodying the'principles of my invention; the parts are shown detached or separated from one another 7 end view of one of the parts; 3 isa sectional view of the device assem "id in operative condition upon an electr c conductor.

The essential principle 'emplo'yed in all cases with the present inventionr-" rdepends upon the contracting property of a slotted or split tapered sleeve when impelled'endwise in a suitably shaped recess of the supporting body or member. The force of such contra ctionis a function of the de ree of taper of the opening or-recess, and it 1s evident that this may be made any value suited to par- Specification of Letters Patent.' I

Application filed November 11, mp7. Serial No. 401,567.

ig'. 2 is an Patented Oct. 27, 190B.

ticular needs. This wedging action may be still further multiplied to any extent by a screw threaded part or element 006 erating with the conical sleeve to force it en wise.

Referrin to the drawings in which like parts are esignated b the same reference sign, 1 indicates a bloc or member forming the main body of the terminal or cable tip. This art may be of any desired form or out line, ut is most conveniently made as shown with a rounded portion 2, to receive the cable or' conductor, and a flat extended or otherwise formed part 3, which. may be drilled with one 'or more holes or o enings 4, to reor clamped in any other desired manner.

5 denotes the conical recess or cavity within the block or member 1, and having lts contracted or reduced end toward-the side or direction at which the cable or conductor enters. The cable or conductor is shown'at 6, and has a bared portion 7, extending backward from its end for a certain distance. The diameter of the metallic or conducting ortion 7 is somewhat less than the smallest iameter of the conical recess,,5.-

8 desi ates a split or slotted sleeve or bushing aving an. internal 0 ening 9, corre sponding'to the diameter of t e conductor 7, and having an exterior tapered or-conical outline exactly corresponding to that ofthe recess 5. I have illustrated the sleeve or bushing 8 alternately slotted inward from its 1 respective ends, the slots extending throu h two-thirds or threeuarters or more of t e entire length of the s eeve, so that they ov'erla at the middle thereof, as clearly illustrated in the drawing. The sleeve may, however be made in entirely separate sectors or sections. I

10 designates a threaded plug or screw adapted to be received in the correspondingly threaded opening 11.0f the block 1 at the large end of the conical recess 5 therein.

The arts are assembled in the manner particu arly shown in Fig. 3. The split sleeve 8 is fitted into the recess 5, and the screw oi plug 10 is, then screwed into place so as to abut against the large end of the split sleeve. Until pressure is applied, the

split sleeve lies toward the large end of this ducto' being inserted, it is merely necessary to tig iten the screw or plug 10 upon the large end of the sleeve 8, by winch the sleeve is forced toward the reduced end of its contioncd. w I a What I claimjis:

1. A cable tip comprising a block having a flattened extension at one end and having a tapering hole extending inward and increasing in diameter from the other end, said hole extcndingclear through the block out of alinemcntwith said flattened extremity, and threaded at its end adjacent to said fiattencd extremity, a split conical sleeve within The contraction is v vantage said tapered hole, and a screw-plug engag' said sleeve to force the. same inward towiii d the reduced end of said tapered hole. 2. A cable tip comprising a block having a flattened extension atone end and having a tapered hole extending inward and increasing in diameter from the other end, said hole extending clear through the block out of alinement with said flattened extremity, and, threaded at its 'end adjacentto said flattened extremity a conical sleeve having slots extending alternatel inward from its respective ends and inc osed within said tapered hole, and a screw plug engaging said sleeve to force the same inward toward the reduced end of said tapered hole. i

In witness "whereof, I subscribe my signature, in the presence of two witnesses.

, LOUIS KELLNER. Witnesses:

Jos. J. WESLEY,

PATRICK J SHELLEY.

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