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Publication numberUS1238448 A
Publication typeGrant
Publication dateAug 28, 1917
Filing dateOct 7, 1916
Priority dateOct 7, 1916
Publication numberUS 1238448 A, US 1238448A, US-A-1238448, US1238448 A, US1238448A
InventorsJuan Diego Shaw
Original AssigneeJuan Diego Shaw
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Device for avoiding the twisting of electric wires.
US 1238448 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


Patented Aug; 28, 1917?.



Speciication of Letters Patent.

Patentediiug.. 28, i917,

Application led October 7, 1916. Serial No. 124,370.

To all whom t may concern:

Be it known that l, JUAN Drnco SHAW, citizen of Argentina, residing at No. 870 Venezuela St., Buenos Aires, Argentina, have invented certain new and useful lmprovernents in Devices for Avoiding the Twisting'of Electric Wires, of which the following is a specification.

My present invention relates to a special devce for avoiding the twisting of electric leads or wires, and the main object of the same isto untwist said wires when twisting or ceiling has already taken place, without necessity ot cutting off the current, in some cases, and without interrupting the con* tacts which may have been established.

The device according to this invention may be applied indiiierently to wall sockets, telephone receivers and the like, where the wires or leads are liable to twist, with the consequent inconvenience.

rlhis difficulty may be avoided, in accordance with the present invention, by making one portion of the device rotary, independ` ently of the other, and arranging within the saine the means necessary toprevent the contact from being broken' while one of the said parts is made to revolve with respect tothe other.

ln order that the invention may be clearly understood and carried into practice without diiiiculty, one of its forms is illustrated, by way of example, in the accompanying drawings, wherein:

Figure 1 is a central longitudinal section of a plug constructed in accord ance with the present lnvention.

Fig. 2 is a perspective view of the portion of the same plug which is applied to the socket.

Figs. 3 and 4 are perspective views of in* termediary rings, made of any suitable conducting material and which are designed to maintain the contacts, and

Fig. 5 is a perspective view of the remaining part of the plug which forms the rotary portion.

In all these drawings the same reference numerals indicate the same or correspond ing parts.

vlt will be evident that although the drawn ings represent a plug and the following description is substantially limited thereto, the device may take any other suitable form, in accordance with the particular use for which it may be designed, without departing trom the basis of this invention, the essential fea tures of which'are clearly determined in the final claims annexed to this specification.

Other modifications might also be introduced without going beyond the scope of the invention.

l is a cylindricalvpicce of ebonite or any other suitable insulating material, provided at its base with the contact pieces 2 and 3, partially covered with insulating material fland designed to establish Contact with the 'terminals of the socketjn the usual manner. When the device is not used for a plug, the

vcontact pieces 2 and 3 may adopt any other suitable form for receiving the electric wires or leads. The contact piece 2 of one of the terminals is electrically connected to a metallic screw 5, the other end of which is screwed into a conducting piece 6, fixed in its turn, by means of a screw 8 to a metallic ring 7 placed in a cavity in the cylindrical body l and insulated by an annular rib or shoulder l2, between which latter aud a central, cylindrical rod-like lug or projection l2 there is produced a recess which will be described later.

The contact piece 3 is electrically connected, by a screw 9, to another metallic ring 10,

encircled by an annular rib OrshOulder 11, and between this rib 1l and the rib l2, aforesaid, there is also formed an annular space or recess.

The inner face of the cylindrical body 1 is threaded as indicated at 25, so as to screw on to the cap 24, also made of ebonite or any other suitable insulating material and which serves as support for the rotary piece 23.

The said rotary piece 23, also constructed nf ebonite or any other'convenient insulate ing material, is substantially cylindrical in shape and has an enlarged inner end portion so as to permit of the cap 24 holding it to the cylindrical body l, without impeding the movement of the rotary piece 23 with respect to the said cap 24 and to the body l which remain fixed and are held together by the screw joint 25 or by means of screws or in any other convenlent manner: Between the enlarged inner end of the plece 23 vand the cap is a space in which is placed a spring designed to maintain free play be tween both pieces, as shown at 26.

Inside the rotary portion 23 is a central rod-like lug or projection 27 which in diameter and position corresponds to the central ,projection 12 of the fixed body 1, with 4latter and the central projection 27 are annular spaces or recesses which form extensions of the similar recesses in the cylindrical member 1, between the ribs 11 and 12 and between this latter and its central proj ection 12.

At the bottom of the recesses between the ribs 13 and 14 and between the latter and its central projection 27 are arranged metallic conducting rings, 18 and 17 respectively, and the remainder of said recesses is filled by the independent intermediary rings 15 and 16 respectively. Said rings are made of conducting material and form contact between the rings 10 and 18 and the rings 7 and 17 respectively, of the device in accordance with the invention.

The ring 17 is connected by means of a metallic screw 22 or in any other suitable manner to one of the ends of the outgoing wire or lead 28, while the contact ring 18 communicates, by means of a supplementary angular portion 19 joined by a screw 20 to another screw 21, with the opposite lead 29. The contacts of the wires may be inclosed within thev same cap or an additional cap may be provided for them.

The operation of the device will be readily understood as it will be evident that without necessity of withdrawing the plug from its socket7 the rotary portion 23 may vbe turned as much as may be needful to nn-I twist the wire, without thereby interrupting the contacts, as these latter are circular and lthe intermediary rings operate in any posieach case the corresponding number of con' tact rings and intermediary rings.

Also other modifications may be introduced, as regards the lconstruction and arrangement of parts, without departing from the limits of the invention, the substantial `features of which will now be set forth the appended claims.

I declare that what I claim as new la desire to secure by Letters Patent, is:

l. An electrical connection of the char acter specified, comprising, in combination a pair of companion members, one of which embodies a sleeve-like cap rigidly connected to the other member and having an axial opening, and a freely-rotatable part having an enlarged inner end disposed within said cap in confronting relation to said other member and a substantially-cylindrical body projecting axially outward through said opening; the confronting faces of said other member and said rotatable part being provided, each, with a pair of spaced, concentric annular ribs and with a central projection disposed within and encircled by the inner rib; the ribs and projection of said members being located directly opposite each other; a separate conducting ring disposed in the space between the outer and inner ribs of each member; aI separate conducting ring disposed in thespace vbetween the inner rib and central projection of each member; conducting wires leading to the rings of said rotatable part; a pair of contact pieces located exteriorly of said other member and connected, each, to one of the' rings thereof; outer and inner conducting means interposed one between the two outer rings and the otherbetween the two inner rings and in slidingcontact with the same; and spring means disposed within the firstmentioned member between the enlarged end of said rotatable part and the adjacent wall of said cap, to press the former axially inward toward said other member, so. as to constantly maintain the said rings electrically connected by said interposed conducting means during the rotary movements of said rotatable part.

2. An electrical connection of the character specified, comprising, in combination,

a pair of companion members, one of which embodies a sleeve-like cap vrigidly connected to the other member and having an axial opening, and a freely-rotatable part having -an enlarged inner end disposed within said

Referenced by
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US2477901 *Apr 7, 1948Aug 2, 1949Robboy Nathan MSwivel fixture joint
US5399093 *Feb 1, 1994Mar 21, 1995Woods Industries, Inc.Low profile rotatable electrical plug
US5595503 *Jun 7, 1995Jan 21, 1997Woods Industries, Inc.Rotatable electrical plug and power cord
US5775920 *Sep 1, 1995Jul 7, 1998Methode Electronics, Inc.Rolling elastomer contact clockspring
US7566223Apr 20, 2007Jul 28, 2009Belkin International, Inc.Electrical connector and method of manufacturing same
US7850458Jun 24, 2009Dec 14, 2010Belkin International, Inc.Electrical connector and method of manufacturing same
US7946852Dec 22, 2008May 24, 2011Belkin Intenational, Inc.Electrical connector and method of manufacturing same
US8002554Nov 19, 2010Aug 23, 2011Belkin International, Inc.Electrical connector and method of manufacturing same
US8197260Aug 6, 2009Jun 12, 2012Belkin International, Inc.Electrical connector and method of manufacturing same
US8469730Aug 6, 2010Jun 25, 2013Belkin International, Inc.Electrical connector and method of manufacturing same
US20080261430 *Apr 20, 2007Oct 23, 2008Belkin International, Inc.Electrical connector and method of manufacturing same
US20090098743 *Dec 22, 2008Apr 16, 2009Belkin International, Inc.Electrical Connector And Method Of Manufacturing Same
US20090258508 *Jun 24, 2009Oct 15, 2009Belkin International, Inc.Electrical Connector And Method Of Manufacturing Same
US20090291570 *Aug 6, 2009Nov 26, 2009Belkin International, Inc.Electrical Connector And Method Of Manufacturing Same
US20100271804 *Apr 22, 2009Oct 28, 2010Levine Jonathan EModular lighting device kit
WO1995021476A1 *Jan 26, 1995Aug 10, 1995Woods Ind IncLow profile rotatable electrical plug
U.S. Classification439/21
Cooperative ClassificationH01R39/64