US2094046A

US2094046A - Electrical fitting

Info

Publication number: US2094046A
Application number: US54844A
Authority: US
Inventors: Carleton W Short
Original assignee: Us Rubber Prod Inc
Current assignee: Uniroyal Inc
Priority date: 1935-12-17
Filing date: 1935-12-17
Publication date: 1937-09-28
Anticipated expiration: 1954-09-28

Description

Sept. 28, 1937.

C. W. SHORT ELECTRICAL FITTING Filed Deb. 1'7, 1955 IHHHH IHHHI HHHH 15 in the fittings, and such portions of the insulatg O e a o s shell removed showing the 15 Patented Sept. 28, 1937 ELECTRICAL FITTING Carleton W. Short, East Providence, R. 1., as-

signor to United States Rubber Products, Inc., New York, N. Y., a corporation of Delaware Application December 17, 1935, Serial No. 54,844

9 Claims. (01. 17s-3e1) This invention relates to electrical fittings, and ferring to the following description and the acparticularly to the construction of the cable tercompanying drawing in which: minals and the means employed for insulating Figure 1 is a top plan view of an electrical plug the conductor terminals bared for connection embodying this invention;

within the fittings. Figure 2 isa cross-section of the plug on line 5 This invention may be used in various types of of Fi 1; electrical fittings for making a connection be- F g r 3 is a View P y in section illustrating tween the conductors of a lead-in cable and conthe method of assembling the P P ducting members within the fitting. Heretofore Figure 4 is an elevational view of a strip the terminal end of the lead-in cable has be n cable terminal illustrating the modified method 10 stripped of all of the insulating material around of s pp t conductor t rminals in which a the terminals of the conductors for a distance portion of t e insulating ove is e oved sufilcient to bare the conductors for connection from the end of the cable; and. v to the conducting members, or binding post with- Figure 5 is an interior View Of a cube p ing material has been entirely removed from th electrical connection between the cable terminal cable. In such type of construction no insulating nd the n ctin m m rs Within he other covering of the cable remained between the bare f Of the S e terminals of the conductors after they were conn embodiment Of th s nv ntion is illustrated nected to the conducting members of the fittings. n s. 1 t 3 in reference to an electrical plu Under such conditions short circuits are liable having a soft r b b y In Which as been to be caused by stray strandsof the bare termlmolded and Vulcanized W P es o med nals crossing over from one terminal to the other. therein for the reception o e cab e H and 0011- Also where soft rubber plug bodies are used the tact members Prior to assembling these Parts 0 terminals may be brought in contact by the disin the b y The Contact members y be tortion of the rubber. Furthermore in plugs have er o he e o a e typ but s shown ing the cable passage terminating with an openin this embodiment they are of the male type as ing in the face of the plug, the opening is not indicated by the blades ring to Fig. 3, filled 'and this gives the plug a bad appear the conducting elements are assembled in the In accordance with the present invention the body n y P in h le I from the rear 30 foregoing disadvantages of the prior art are obend of the plug through the passage IS in the viated by stripping the cable conductor termi- P y and Ou o h ts face l4. The cable nals so that the portion of the cable sheath or covering m y be made of rubb r or of a rubbercoverin which normally separates t conduc like composition and the conductor terminals I5 tors is not removed from the terminal end of maybestripped therefrom either y cutting y 35 the cable. The bare conductor terminals are bent a of h covering 011 one side of the laterally from the unremoved portion of the covduct)? as shown in 4 by slitting the coverering and electrically connected to the contact mg as shown at in 1 and pulling the members. After the conductor terminals and the minals through the cut 511i; made in the 40 contact members have been assembled in the fiting, but in any event the insulating cable cover- 40 ting the unremoved portion of th covering ing which normally separates the conductors is jects between the laterally projecting conductor not removefi- Another and less desirable Way of terminals and serves as an insulator for the bare lateliauy brmging the termini? without terminals. The interposed projecting covering movmg the insulatmg material m which they prevents Stray strands of a multi stranded com were embedded is by forcibly pulling out laterally 45 ductor terminal from crossing over from one teri qownwardly the terminal ends so that h mm 91 to the other and causing short circuits ggilrip through the side walls of the insulation.

ano her less desirable way is to puncture e e fi is m gthe side walls of the cable at a suitable distance Proiec ng o e or from its end and then withdraw through the 50 P y fills the cable Passage to the face 0f the punctures the end portions of the conductors ly- Dlllg a d by improves the appearance of the ing between the punctures and the cable end.

plug. As shown in Fig. 1 the insulating covering of The above advantages and other objects of this the cable -II is provided with longitudinal slits invention will be more clearly understood by rel6 which extend inwardly to or adjacent to the conductors i1 and as shown in Fig. 4 some of the covering is removed to provide openings [6. The terminals i5 of the conductors are bared by pulling them laterally through the slits l6 or openings i6 and are connected to the contact blades i2 so that the conductor-free covering iii in Fig. 2 or l8 in Fig. 4 extends beyond and between the laterally extending bared conductor terminals IS. The blades i2 and the conductor terminals l5 so assembled are inserted respectively in the blade recesses i9 and conductor terminal recesses 2i] and are retained in the body ill by the barbs ti on the contact blades i2.

As shown in Fig. 2 the conductor-free portion i8 of the cable covering extends between and beyond the laterally projecting conductor terminals l5 and to the end of the cable passage i3 and thereby prevents short circuits from being caused by stray strands of the conductor terminals crossing over from one terminal to the other or bythe conductor terminals being forced in contact with one another by the compression of the plug body. The extension of the stripped portion I 8 of the covering also fills the end of the passage l3 and gives the face of the plug a finished appearance, but the extension may be.

shortened if desired.

The embodiment of this invention illustrated by the cube tap, or female fitting shown in Fig. 5 is illustrative of a wide variety of electrical fittings or appliances in which a covered, preferably rubber covered cable is led through an opening in the wall of a shell and the currentcarrying conductors are attached to binding posts 25. In order to illustrate the interior connections the half shell 22 containing the female contact members 23 is shown, the other complementary half being removed. Each half is provided with complementary half openings 24 for the reception of the lead-in cable II. The terminals l5 of the conductors are bared as previously described and connected to the binding posts 25.

The several modifications of this invention have been shown and described in reference to a two conductor cable. It is obvious that the principles of this invention are applicable to one or more conductor cables, and it will be understood that changes in details as shown may be made without departing from the spirit of this invention, and it is intended to cover all of its phases within the scope of the appended claims.

Having thus described my invention what I claim and desire to protect by Letters Patent is:

1. An electrical device having a body provided with conducting members, an electrical cable having an insulating covering and spaced apart conductors therein connected to said members,

' said covering having openings in the end adjacent to said connections, said openings extending longitudinally from said ends for a distance at least as great as the length of the bare conductor required for making the connection with said members, said conductors beingpulled through said .openings and extending laterally toward said members, and said insulating covering having said openings therein and all of the conductors removed therefrom extending between and beyond said laterally projecting conductors.

2. An electrical device having a body provided with conducting members, an electrical cable having a rubber-like insulating covering and spaced apart conductors therein connected to said members, said covering having openings in the end adjacent to said connections, said openings extending longitudinally from said ends for a distance at least as great as the length of the bare conductor required for making the connection with said members, said conductors being pulled through said openings and extending laterally toward said members, and said insulating covering having said openings therein and all of the conductors removed therefrom extending between and beyond said laterally projecting conductors.

3. An electrical device having a body provided with conducting members, an electrical cable having a rubber-like insulating covering and spaced apart conductors therein connected to said members, said covering having narrow slits in the end adjacent to said connections, said slits extending longitudinally from said ends for a distance at least as great as the length of the bare conductor required for making the connection with said members, said conductors being pulled through said slits and extending laterally toward said members, and said insulating covering having said slits therein and all of the conductors removed therefrom extending between and beyond said laterally projecting conductors.

4. An electrical plug having a preformed body provided with a face and rear end, a bore extending through said body and opening into said rear end and into said face, recesses for contact members extending into said body and opening into said face, slots for cable conductor terminals opening into said face and extending between said passage and said recesses, contact members secured in said recesses, an electrical cable extending into said bore, said cable having an insulating covering and spaced apart conductors therein connected to said contact members, said covering having openings in the end adjacent to said contact members, said openings in said covering extending longitudinally to the depth of said conductors and rearwardly from the end of said cable, said conductors being pulled through said openings and extending laterally from said cable through said slots to said contact members, and said insulating covering having said openings therein and all of the conductors removed therefrom extending between and beyond said laterally projecting conductors.

5. An electrical plug comprising a soft rubber body having a passage of substantially uniform cross-section extending therethrough and contact members secured in said body and extending through its face, a cable extending into said passage, said cable having an insulating cover containing electrical conductors, said cover having I laterally of said passage and extending through the face of the plug, a cable having an insulating cover containing conductors extending into said passage, said cable cover having its end slitted and the bare ends of the conductors extending laterally through said slits and connected to said blades below the face of said body, and said slitted portion of said cover extending into said passage between the bare ends of said conductors and illiing a sumcient portion of said passage to prevent contact between said bare ends of said conductors. 7. An electrical plug having a preformed body provided with a face and rear end, a bore extending through said body and opening into said rear end and into said face, recesses for contact members extending into said body and opening into said face, slots for cable conductor terminals opening into said face and extending between said passage and said recesses, contact members secured in said recesses, an electrical cable extending into said bore, said cable having an insulating covering and spaced apart conductors therein connected to said contact members, said covering having openings in the end adjacent to said contact members, said openings in said covering extending longitudinally to the depth of said conductors and rearwardly from the end of said cable, said conductors being pulled through said openings and extending laterally from said cable through said slots to said contact members, and said insulating covering having said openings therein and all of the conductors removed therefrom extending between and beyond said laterally projecting conductors and to the end of said bore terminating in the face of said plug.

8. An electrical plug having a preformed body provided with a face and rear end, a bore extending through said body and opening into said 0 rear end and into said face, recesses for contact members extending into said body and opening into said face, slots for cable conductor terminals opening into said face and extending between said passage and said recesses, contact members secured in said recesses, an electrical cable extending into said bore, said cable having a rubber composition insulating covering and spaced apart conductors therein connected to said contact members, said covering having openings in the end adjacent to said contact members, said openings in said covering extending longitudinally to the depth of said conductors and rearwardly from the end of said cable, said conductors being pulled through said openings and extending laterally from said cable through said slots to said contact members, and said insulating covering having said openings therein and all of the conductors removed therefrom extending between and beyond said laterally projecting conductors and to the end of said bore terminating in the face of said plug.

9. An electrical plug having a preformed soft rubber body provided with a fiat face and rear end, a bore extending through said body and opening into said rear end and into said face, recesses for contact members extending into said body and opening into said face, slots for cable conductor terminals opening into said face and extending between said passage and said recesses, contact members secured in said recesses, an electrical cable extending into said bore, said cable having a rubber composition insulating covering and spaced apart conductors therein connected to said contact members, said covering having narrow slits in the end adjacent to said contact members, said slits in said covering extending longitudinally to the depth of said conductors and rearwardly from the end of said cable, said conductors being pulled through said slits and extending laterally from said cable through said slots to said contact members, and said insulating covering having said slits therein and all of the conductors removed therefrom extending between and beyond said laterally projecting conductors and filling the end of said bore to the face of said plug.

CARLETON W. SHORT.