US554716A - Electrical connecting-cord - Google Patents

Description

(N Model.)

- G. H. MOBVGY.

ELECTRICAL GGNNBGTING com).

No'. 554,716. Pat-entedfeb. 1a, 1896.

UNITED STATES PATENT OEEICE.

CHARLES H. MCEVOY, OF LOWELL, MASSACHUSETTS.

ELECTRICAL ClONNECTlNG-CORD.

SPECIFICATION forming part of Letters Patent No. 554,716, dated February 18, 1896.

Application filed May 15, 1895. Serial No. 549,349. (No model.)

To all whom, it may concern:

Be it known that I, CHARLES H. McEvoY, a citizen of the United States, residing at Lowell, in the county of Middlesex and Commonwealth of Massachusetts, have invented a certain new and useful Improvement in Electrical Connecting-Cords, of which the following is a speciiication.

My invention relates to electrical connecting-cords such as are used with handtele phones 5 and it consists in the devices hereinafter described and claimed. Such connecting-cords are generally provided with two separately-covered conductors inclosed with their covers in a common covering, usually of braided material, from which both conductors project at each end, the ends of said conductors having separately-formed metallic tips secured thereto. Commonly a suspension-cord of non-conducting material is used to take the weight and strain of the hand-telephone or other instrument off from said tips.

The object of this invention is to prevent the fraying of the ends of the outer or common covering and improving the appearance of the same, and to attach the suspensioncords securely to the conductors and to said outer covering within the latter, thereby preventing the slipping` of any of these parts on other parts of the device.

In the accompanying drawings the different figures represent connecting-cords constructed according to my improvement, Figure l showing a suspension-cord passing through the outer covering and stitched thereto and to the conductors; Fig. 2, a similar view showing the suspension-cord hitched around the conductors and outer covering; Fig. 3 at the upper end showing how the covering is wound with thread to the suspension-cord and conductors; Fig. 4, a central section of the outer covering, showing the conducting-cord and a short suspension-cord which is covered for only a short distance by the outer covering; Fig. 5, a section of the outer covering of the iinished cord,showing said covering bound with thread to the conductors and suspensioncord, the enlargements of the end portions of the cord being necessarily exaggerated in all the figures.

The connecting-cord A consists of two flexible conductors a ct, each having a separate covering, preferably a tubular braided covering of ordinary construction, andboth of said conductors, with their coverings, being inserted for the greater portion of their length in the outer or common covering a2 of the braided material, leaving the ends of said conductors (which are provided with metallic tips a3 a4) 'free to be secured in binding-posts in the usual manner.

The suspension-cord B may be a single cord passing entirely through the covering CL2, as indicated by dotted lines in Fig. 1; or said suspension-cord may be in two short pieces B', as illustrated in Figs. 4 and 5. In either case, said suspension-cord is secured to the covering a2 and to the conductors ay a in substantially the same manner.

The end portions of the covering a2 are retracted or slipped toward each other on the conductors, leaving said covering loose for several inches from its ends, and a thread or fine twine C is wound tightly about said outer covering, binding said covering firmly to the conductors and to the suspension-cord, the pieces of the latter, if said suspension-cord is made in two pieces, being inserted in said outer covering for a short distance beyond the place of the thread-twine C. It will not ordinarily be necessary to tie the ends of the thread C, although this may be done. NVhen the winding is completed, the outer covering is easily pushed back bythe lingers over the thread or twine C, said covering turning inside out or rather outside in for some distance beyond said thread or twine and completely concealing the same, as shown in Figs. l and 3, Then the cord has thus been completed, the enlargement a5 at the ends of the covering a2 is scarcely noticeable to the eye, owing to the elastic nature of the braided fabric, but is readily felt as being solid and harder than the other parts of the covering and its contents.

For still greater security, in the case of very heavy cords, opposite sides of the covering may be stitched together and to the suspension-cords and conductors, as at as in Fig. l, or the suspensioncord may be carried once around the end portion of the outer covering a2 and through the bight thus formed making a half-hitch a7, as shown in Figs. 2 and 4, but ordinarily neither the stitching a6 nor halfhitch a7 will be necessary.

The means herein described of securing the suspension -cord improve the appearance of IOO the connectingcord and obviate the troublesome and expensive so-ealled hand-braiding, or running the braiding-machine by hand, necessary where the suspension-cord is made in 011e with the covering (12.

l claim as my inventionl. A11 electrical co1111ecti11g-cord, compris- `ing two covered conductors, inelosed in a ing two covered conductors, inclosed in a common covering and projecting from. the ends thereof, and 011e or niore suspensioncords, arranged in said covering, the ends ol' said covering being turned in and secured To said conductors, substantially as described.

4. An electrical connecting-cord, comprising two covered conductors, inclosed in a @0111111011 covering and projecting (1'10111 the ends thereof, and 011e 0r more suspensioncords, arranged in said covering, the ends of said covering being turned in and the projecting parts of said suspension cord or cords bcing looped around the ends of said co111111o11 covering, substantially as described.

In witness whereof l have signed this specification, in the presence oil two atiestingwitnesses, this 11th day ol' May, A. l). llsfl.

CHARLES II. MCEYOY.

V\Vitnesses:

ALBERT M. Moons, LILIAN E. QUEN.

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