US1247656A

US1247656A - Terminal for conductors.

Info

Publication number: US1247656A
Application number: US7368516A
Authority: US
Inventors: William Gadke
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-01-22
Filing date: 1916-01-22
Publication date: 1917-11-27
Anticipated expiration: 1934-11-27

Description

W. GADKE.

TERMINAL FOR CONDUCTORS. APPLICATION FILED 1m. 22. 1916.

1 ,,%%%656. Patented Nov. 27, 191?.

WILL GADKE, 0F PHILADELPHIA, PENNSYLVANIA.

TERMINAL FOR CONDUCTORS.

mamas.

Specification of Letters Patent.

Patented Nova 2?, 1911?.

Application filed January 2-2, 1916. Serial No. 73,685.

To all whom it may concern Be it known that I, WILLIAM GADKE, a citizen of the United States, residing in Philadelphia, Pennsylvania, have lnvented Terminals for Conductors, ofwhich the following is a specification.-

One object of my invention is to provide a relatively simple, easily applied terminal particularly designed for use w1th insulated conductors, the construction being such that the terminal will be mechanically as Well as electrically connected to the conductor so that it cannot easily be detached.

It is further desired to provide a terminal which may be caused to make a satisfactory electrical connection with a stranded conductor without the necessity for soldering or sweating it thereto, the invention being particularly adapted for use with conductors having a relatively heavy solid insulating covering such as rubber or guttapercha, although being by no means confined to use solely with the same.

These objects and other advantageous ends I secure as hereinafter set forth, reference being had to the accompanying drawings, in which,

Figure 1 is a detached perspective of a terminal constructed according to my invention;

Fig. 2 is a vertical longitudinal section of the terminal shown in Fig, 1, illustrating it as applied to an insulated conductor;

Fig. 3 is a detached elevation, partly in section, illustrating a conductor with my terminal mounted thereon and showing the device with which it is designed to coact.

In the above drawings 1 represents an electric conductor formed of a number of twisted wire strands usually of copper. This conductor has a covering 2 of rubber, gutta-percha, or other insulation such as is usually considered necessary for the safe distribution of electric currents of high tension. To provide a terminal for this conductor I employ a cylindrical metal structure in the form of a sleeve 3 having in one end a relatively large cylindrical cavity or recess designed to be comparatively closely fitted by the insulating material 2 of the com ductor. In the opposite end of this terminal structure is a smaller and shallower recess 4 connecting with the larger cavity through a central passage of suitable diameter to more or less closely fit theconductor 1.

In applying the terminal to a conductor or cable, the insulation is removed from a suitable length of the same and the bare conductor is passed into the large recess of said terminal through the passage of reduced diameter in the partition between the recesses so that the end of the insulation 2 closely fits against the bottom of said recess. The extremity of the conductor is then upset or opened out in the cavity or recess 4 so that its strands practically fill the same, forming a head composed of the laterally bent and more or less tangled mass of wire, the length of wire extended through the passage in the partition being determined by experiment in order that it shall practically fill said recess 4:. Thereafter, even if considerable tension be exerted on the conductor, it cannot be drawn out of the terminal 3, since the relatively sharp bends in the individual wire strands prevent the head 5 formed by the wires in the recess l from becoming sufficiently straightened or changed in shape to allow its constituent wires to draw out through the comparatively narrow passage 6. In order to detachably connect the terminal 3 with another conductor 7, for example, the latter may be provided with a receptacle in the form of a c lindrical sleeve 8 whose hollow or cavity 9 is of such diameter as to be closely fitted by the terminal 3. This latter has a pressed out lug or projection 10 formed adjacent its rear end and is provided with any suitable number of longitudinally extending slots 11 opening into its larger cavity so as to permit of its rear portion being sufiiciently compressed or contracted in diameter to allow the projection after passing into the hollow of the member 8 to spring into an annular recess 12 formed in the wall thereof. In Fig. 3 I have shown the member 8 as provided with a heavy insulating case or cover 13 but this may be omitted without departing from my invention, the conductor being free to turn within the part 3 with which it makes good electrical contact.

I claim The combination of a receptacle including a hollow metal sleeve having an interior annular recess and an interior substantially sage of the partition and laterally spread in the second cavity to form a head positioned to be. engaged by'the central projection of 10 the sleeve with -a body of insulation surrounding the conductor-and extending into the first cavity of the terminal.

' WILLIAM GADKE.