US2470423A

US2470423A - Electrical splicer

Info

Publication number: US2470423A
Application number: US637931A
Authority: US
Inventors: William H Alford
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-12-29
Filing date: 1945-12-29
Publication date: 1949-05-17
Anticipated expiration: 1966-05-17

Description

May 17, 1949. w. H. ALFORD ELECTRICAL SPLICER Filed Dec. 29, 1945 NVENTOR. WML/AM H mrow E S Q @N D E Patented May 17, 1949 UNITED STATES PATENT OFFICE ELECTRICAL SPLICER William H. Alford, Winston-Salem, N. C.

Application December 29, 1945, Serial No. 637,931

2 Claims. (Cl. 174-84) My invention relates to wire splicing devices with particular reference to one which is adapted for connecting the ends of insulated wires, one of the primary objects of the invention being to eiIect connection of wire ends without necessitating the removal of their insulation covering.

The device is .particularly adapted for use where a temporary connection of Wires is to be made as for instance, when it is desired to lengthen the power cord of a radio set or fixture, the splicing or connection being effected without requiring any tools and in a very short time, no skill on the part of the operator being required.

The vinvention also contemplates a device for the purpose stated, which is Very simple in construction, strong and durable, inexpensive to manufacture and entirely safe and very efllcient in practical use.

The invention resides in certain novel features of construction, combination and arrangement of parts to be hereinafter described and claimed, reference being had to the accompanying drawing which illustrates the now preferred form.

It is to be understood, however, that the disclosure is to taken merely as illustrative, it being obvious that various changes and modifications may be made therein without departing from the spirit and scope of the invention as hereinafter claimed.

In the drawings, wherein the same reference characters have been used to designate the same parts throughout the several views,

Fig. 1 is a central longitudinal sectional view of a wire splicer or connector embodying my invention;

Fig. 2 is a cross-sectional view through one of end and communicating with an outwardly iiared cam providing portion 8. This flared cam pro viding portion l of the bore 1 terminates short of the enlarged threaded inner end 9 of said bore.

By preference the bore 9 of the left hand sleeve I, as viewed in Fig. 1, will have left hand threads, while the threaded bore portion 9 of the right hand sleeve will have right hand threads. The inner ends of the sleeves 6 are threaded onto an exteriorly threaded cylindrical connector I having left hand threads IIla leading from oneend and right hand threads Ib leading from the other end. there being a thread stop or shoulder Ic to separate the threads IIia, IIIb.

'I'he sleeve connector I0 will, of course, be of insulating material and has the central lineally the end sleeves showing the `opposed opened jaws Y having the insulation piercing pins and apertured guard plates:

Fig. 3 is a lineal sectional view through one of the `iaws and associated guard plate in pinshielding position;

Fig. 4 is a view similar to Fig. 3, but showing the guard plate ilattened out and the jaw pins projected through the apertures thereof to piercethe insulation covering of a wire; and

Fig. 5 is a plan view, partly in section, of one of the wire guiding and pin guarding plates.

Referring specifically to the drawings. nu- :neral 8 designates a pair of duplicate sleeves of insulating material, a phenol condensation product. for instance one commercially known as Bakelite being especially suitable.

Each sleeve I has a medial lineally extending wire end receiving bore opening from its outer extending bore II receiving in the present instance, a pair of stii spring metal conductor strips I2 having their outer ends extending beyond the outer ends of the bore AII and bent laterally in opposite directions as indicated at I2a. To the outer end of each of the spring metal conductor strip portions Ila is welded or otherwise secured a transversely arcuate jaw plate I3 of #spring metal.

As illustrated, the two jaw plates I3 within each sleeve 6 are arranged in opposition to one another and have the sharp pointed inwardly extending insulation piercing pins I4.

In order to admit of insertion of the wire ends between the jaw plates I3 without snagging on the pins I4, I provide guide plates I5 which are securedto the jaw plates at their outer ends only, and overlie the points of -the pins I'4` The wire guiding plates I5 are preferably of very light spring metal and they are arcuate in cross secvarranged in opposition to the pins I4 so as to allow the pins to project through the insulation covering oi the wire when the opposed jaw plates are drawn together.

It will be apparent that when the insulated ends of wires I1 have been inserted into the bores I and disposed between the guide plates I5, electrical connection of said ends can be eifected by simply screwing up the sleeves 8 to cause the rounded ends of the jaw plates Il to ride up the cam portions 8 of bores 1. This causes thepins I4 to be projected through the holes Il oi' the guide plates I I, it being understood that the iree ends lia simply slide along the conductor strip portions Iza as said plates yield under pressure. The responsive give to the pres- From the foregoing description, taken in connection with the drawing, it will be apparent' that a very simple and effective wire splicer has been provided. The metal conductor I2, while mentioned as being in separate parts may, of course, be made of one piece. With split ends I2a.

Many other modifications in' the structure illustrated will also suggest themselves.

Having thus described my invention, what I claim is: A l

1. An electrical wire splicer comprising in combination a pair of sleeve members, each of said members having a lineally extending wire endreceiving bore opening from its outer end, an enlarged threaded connector receiving bore opening from its inner end and a ared cam-providing bore portion connecting said aforementioned bores, the entire length of the thus provided opening through each sleeve being at least insulation-surfaced, an exteriorly threaded lconnector having its ends operatively engaged in the respective threaded bores of said sleeve members, said connector having a conductor receiving 'passage extending therethrough and communicating with said enlarged threaded sleeve bores, electrical conductor means extending through said connector passage, opposed oppositely directed spring material arms at each end of said conductor means, a pair of opposed wire terminal-engageable jaws in the threaded bore portion of each sleeve and carried by the respective adjacent spring material conductor-carried arms, the outer ends of the jaws normally bearing against the sleeve bore inwardly of the outwardly ared cam portion thereof, and insulation piercing means projecting inwardly from each of said jaws.

2. An electrical wire splicer comprising in combination a pair of sleeve members, each of said members having a lineally extending wire endreceiving bore opening from its outer end, an enlarged threaded connector receiving bore opening from its inner end and a flared cam-providing bore portion connecting said aforementioned bores, the entire length of' the thus provided opening through each sleeve being at least insulationsurfaced, an exteriorly threaded connector having its ends operatively engaged in the respective threaded bores of said sleeve members, said connector having a conductor receiving passage extending therethrough and commiiunicating with saidv enlarged threaded sleeve bores, electrical conductor means extending through said connector passage, opposed oppositely directed spring material arms at each end of said conductor means, a pair of opposed wire terminal-engageable jaws in the threaded bore portion of each sleeve and carried by the respective adjacent spring material lconductor-'carried arms, the outer ends of the jaws normally bearing against the sleeve bore inwardly of the outwardly flared cam portion thereof, insulation piercing means projecting inwardly from each of said jaws, a

wire end-guiding shield overlying the insulationf piercing means o f each jaw and having an aperture opposite each of said piercing means, and a spring like connection between each of said shields and its associated jaw at the outer end only of Same.

WILLIAM H. ALFORD.

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

UNITED STATES PATENTS Number Name Date 1,171,710 Freixas Feb. 15, 1916 1,520,503 Mills Dec. 23, 1924 1,650,779 Williams Nov. 29, 1927 1,847,972 Morris Mar. 1, 1932 2,103,891 Brown Dec. 28, 1937 2,245,194 Hollander June 10, 1941 2,339,488 Kratoville Jan. 18, 1944 2,359,541 Bancroft Oct. 3, 1944 FOREIGN PATENTS Number Country Date 352,993 Germany Apr. 19, 1921 28,102 Great Britain Apr. 1, 1909 toA