US3223961A - Electrical plug and socket connectors - Google Patents

Electrical plug and socket connectors Download PDF

Info

Publication number
US3223961A
US3223961A US175696A US17569662A US3223961A US 3223961 A US3223961 A US 3223961A US 175696 A US175696 A US 175696A US 17569662 A US17569662 A US 17569662A US 3223961 A US3223961 A US 3223961A
Authority
US
United States
Prior art keywords
plug
socket
recess
ferrule
tapered surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US175696A
Inventor
Wilhelm C J Esser
August L M Wilm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Corp
Original Assignee
AMP Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AMP Inc filed Critical AMP Inc
Application granted granted Critical
Publication of US3223961A publication Critical patent/US3223961A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/20—Pins, blades, or sockets shaped, or provided with separate member, to retain co-operating parts together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs

Definitions

  • This invention relates to electrical plug and socket connectors, and more particularly to an improvement in a resilient detent for releasably securing the parts together.
  • Connectors of this nature are particularly suitable and adaptable for connecting high tension conductor cables to automotive distributor heads or the like, the sockets being disposed in insulating sleeves fixed in the heads.
  • the plugs which are attached to the ends to the electrical cables are firmly and securely, but releasably, retained in the sockets.
  • the plug usually has several detent elements which have the same axial location along the plug and thus operates simultaneously as a unit when the plug is engaged or disengaged from the socket. The forces required to depress the detents thus reach their highest values simultaneously during the plug withdrawal and can become so high as to render the plug difiicult to remove from the socket.
  • An object of the invention is the provision of a plug which can easily be removed from the socket and is of simple construction while being rugged in use and foolproof in operation.
  • a recess in the socket and the detents of the plug are so arranged that the forces required to depress the detents do not reach their highest values simultaneously.
  • FIGURE 1 is a perspective view of the connector plug member
  • FIGURE 2 is a top plan view of the plug member
  • FIGURE 3 is an end view of the plug as it is shown in FIGURE 2;
  • FIGURE 4 is a side elevational view of the connector plug member disposed in an insulating sleeve, the socket member and the sleeve being illustrated in longitudinal section.
  • the detents are formed as arcuate peripheral ribs on the plug body, the cooperating recess being a groove in the socket extending parallel to the ribs.
  • the plug is constituted by a cylindrical metal ferrule 2 which is received in the bore 4 of a socket 6, and receives the end of an insulated cable 8.
  • the plug is preferably a cylindrical ferrule substantially the length of which is arranged to surround the cable to which it is attached so that the ferrule is not deformed in the event the cable is pulled in the transverse direction of the ferrule.
  • a triangular spear 10 cut from the wall of the ferrule 2 has been bent at a right angle inwardly of the ferrule 2 piercing the insulation 12 of the cable 8 and extending into the core 14 of the cable to provide a permanent electrical connection between ferrule 2 and core 14.
  • Further spears 36 or the like have also been cut from the wall of the ferrule 2 and have also been bent inwardly of the said ferrule, and protrude or extend into the insulation 12 to prevent relative axial movement between the cable 8 and ferrule 2.
  • the ferrule 2 has a recess 16 from the walls 18 and 20 of which extend two opposed tongues 22 and 24.
  • the tongue 22 has been bent to provide an arcuate detent rib 26 which is resiliently depressable and extends in a circumferential direction of the ferrule 2 and is wedge shaped as seen in cross-section.
  • a similar detent rib 28 on the tongue 24 is displaced from the rib 26 in the axial direction of the ferrule 2.
  • the detent ribs 26 and 28 are both received in a circumferential groove 30 of semicircular cross-sectional shape on the internal surface of the socket member 6 as can be seen in FIGURE 4.
  • T he groove 30 has been formed by pressing the wall of the socket 6 to provide a rib 32 complementary to the groove 30, rib 32 to be received in an inner circumferential groove 34 in an insulating sleeve forming part 38, for eqample, of a distributor head, to prevent relative axial movement between the member 6 and the sleeve 33.
  • the sleeve 38 has a bell mouth 40 to act as a guide for inserting the ferrule 2 into the bore 4.
  • the cable 8 is pulled in the direction indicated by the arrow in FIGURE 4.
  • the detent rib 28 is cammed by the right hand portion of the wall of the groove 30 and is depressed so that it can pass along the bore 4 in the direction of the arrow.
  • the detent rib 26 When the rib 28 has been fully depressed, the detent rib 26 reaches a wall portion adjacent the aforesaid wall portion and is in turn depressed to pass along the bore 4 in the same manner as detent rib 28. The forces required to depress the two ribs thus reach their maximum value at different periods during withdrawal of the ferrule 2.
  • the wedge shaped construction of the detent ribs 26 and 28 facilitates the insertion of the ferrule 2 into the bore 4.
  • ferrule 2 surrounds the end of cable 8 throughout the length of the ferrule, the ferrule is not readily deformed if the cable is pulled in the transverse direction of the ferrule. Since the tongues 22, 24 and the detent ribs 26 and 28 and the spears 10 and 36 are all integral with the ferrule 2, a ferrule blank can readily be stamped from a sheet of metal, e.g., brass, and subsequently rolled to form the ferrule in a rapid and inexpensive manner.
  • a ferrule blank can readily be stamped from a sheet of metal, e.g., brass, and subsequently rolled to form the ferrule in a rapid and inexpensive manner.
  • the detent rib 28 Since the right hand end, see FIGURE 4, of the detent rib 28 abuts one wall of the groove 30, and the left hand end of the detent rib 26 abuts the opposite wall of the groove 30 relative axial movement between the ferrule 2 and socket 6 is prevented.
  • the plug can easily be removed from the socket and is of simple design, yet rugged and foolproof in actual operation.
  • a metallic plug having a plurality of detent projections or resilient cooperation with said recess to retain the plug in the socket, said projections being offset from one another along the insertion axis of the plug for sequential depression thereof upon insertion and Withdrawal of the plug into and from the socket, the maximum axial spacing of the projections being less than the width of the recess in which it is intended to engage, each projection defining a tapered surface inclined towards the longitudinal axis of the plug in the insertion direction thereof which merges into another tapered surface extending in an opposite direction with respect to said first-mentioned tapered surface, the inclined surface of the projection nearest the insertion end of the plug adapted to wedgingly engage an interior Wall portion of the socket adjacent said recess, the other tapered surface of the other projection adapted to engage said recess.
  • An electrical connector comprising a socket having an internal annular recess, a plug receivable in said socket and including a ferrule for crimping about an electrical lead wire and a pair of opposed tongues disposed for independent resilient depression, a detent rib on each of said tongues defining a pair of detent ribs cooperable with said recess to retain the plug in the socket, one rib being offset from another along the insertion axis of the plug for sequential depression thereof upon withdrawal of the plug from the socket, the axial spacing of said ribs being less than the width of said recess, the detent rib nearest the insertion end of the plug having a tapered surface inclined towards the longitudinal axis of the plug in the insertion direction thereof for Wedging engagement with the interior surface of the socket, and the other detent rib having a surface facing oppositely to the insertion direction for resilient engagement With the recess to drive the inclined surface into tight Wedging engagement with the interior surface of the socket.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Description

Dec. 14, 1965 w. c. J. ESSER ETAL 3,223,961
.ELECTRICAL PLUG AND SOCKET CONNECTORS Filed Feb. 26, 1962 nited States Patent 2 Claims. 61. 339-223 This invention relates to electrical plug and socket connectors, and more particularly to an improvement in a resilient detent for releasably securing the parts together.
Connectors of this nature are particularly suitable and adaptable for connecting high tension conductor cables to automotive distributor heads or the like, the sockets being disposed in insulating sleeves fixed in the heads.
It is desirable for the plugs which are attached to the ends to the electrical cables, to be firmly and securely, but releasably, retained in the sockets. In known connectors of this type the plug usually has several detent elements which have the same axial location along the plug and thus operates simultaneously as a unit when the plug is engaged or disengaged from the socket. The forces required to depress the detents thus reach their highest values simultaneously during the plug withdrawal and can become so high as to render the plug difiicult to remove from the socket. An object of the invention is the provision of a plug which can easily be removed from the socket and is of simple construction while being rugged in use and foolproof in operation.
According to the invention a recess in the socket and the detents of the plug are so arranged that the forces required to depress the detents do not reach their highest values simultaneously.
Other objects and attainments of the present invention will become apparent to those skilled in the art upon a reading of the following detailed description when taken in conjunction with the drawings in which is described an embodiment of the invention; it is to be understood, however, that the embodiment is not intended to be exhaustive nor limiting of the invention but is given for purposes of illustration in order that others skilled in the art may fully understand the invention and the principles thereof and the manner of applying it in practical use so that they may modify it in various forms, each as may be best suited to the conditions of a particular use.
The preferred embodiment will now be described by way of example with reference to the accompanying drawing in which:
FIGURE 1 is a perspective view of the connector plug member;
FIGURE 2 is a top plan view of the plug member;
FIGURE 3 is an end view of the plug as it is shown in FIGURE 2;
FIGURE 4 is a side elevational view of the connector plug member disposed in an insulating sleeve, the socket member and the sleeve being illustrated in longitudinal section.
In a preferred embodiment of the invention, the detents are formed as arcuate peripheral ribs on the plug body, the cooperating recess being a groove in the socket extending parallel to the ribs.
The plug is constituted by a cylindrical metal ferrule 2 which is received in the bore 4 of a socket 6, and receives the end of an insulated cable 8.
The plug is preferably a cylindrical ferrule substantially the length of which is arranged to surround the cable to which it is attached so that the ferrule is not deformed in the event the cable is pulled in the transverse direction of the ferrule.
A triangular spear 10 cut from the wall of the ferrule 2 has been bent at a right angle inwardly of the ferrule 2 piercing the insulation 12 of the cable 8 and extending into the core 14 of the cable to provide a permanent electrical connection between ferrule 2 and core 14. Further spears 36 or the like have also been cut from the wall of the ferrule 2 and have also been bent inwardly of the said ferrule, and protrude or extend into the insulation 12 to prevent relative axial movement between the cable 8 and ferrule 2. As best seen in FIGURE 2 the ferrule 2 has a recess 16 from the walls 18 and 20 of which extend two opposed tongues 22 and 24. The tongue 22 has been bent to provide an arcuate detent rib 26 which is resiliently depressable and extends in a circumferential direction of the ferrule 2 and is wedge shaped as seen in cross-section. A similar detent rib 28 on the tongue 24 is displaced from the rib 26 in the axial direction of the ferrule 2. The detent ribs 26 and 28 are both received in a circumferential groove 30 of semicircular cross-sectional shape on the internal surface of the socket member 6 as can be seen in FIGURE 4. T he groove 30 has been formed by pressing the wall of the socket 6 to provide a rib 32 complementary to the groove 30, rib 32 to be received in an inner circumferential groove 34 in an insulating sleeve forming part 38, for eqample, of a distributor head, to prevent relative axial movement between the member 6 and the sleeve 33. The sleeve 38 has a bell mouth 40 to act as a guide for inserting the ferrule 2 into the bore 4. To remove the ferrule 2 from the bore 4, the cable 8 is pulled in the direction indicated by the arrow in FIGURE 4. The detent rib 28 is cammed by the right hand portion of the wall of the groove 30 and is depressed so that it can pass along the bore 4 in the direction of the arrow.
When the rib 28 has been fully depressed, the detent rib 26 reaches a wall portion adjacent the aforesaid wall portion and is in turn depressed to pass along the bore 4 in the same manner as detent rib 28. The forces required to depress the two ribs thus reach their maximum value at different periods during withdrawal of the ferrule 2. The wedge shaped construction of the detent ribs 26 and 28 facilitates the insertion of the ferrule 2 into the bore 4.
Since the ferrule 2 surrounds the end of cable 8 throughout the length of the ferrule, the ferrule is not readily deformed if the cable is pulled in the transverse direction of the ferrule. Since the tongues 22, 24 and the detent ribs 26 and 28 and the spears 10 and 36 are all integral with the ferrule 2, a ferrule blank can readily be stamped from a sheet of metal, e.g., brass, and subsequently rolled to form the ferrule in a rapid and inexpensive manner.
Since the right hand end, see FIGURE 4, of the detent rib 28 abuts one wall of the groove 30, and the left hand end of the detent rib 26 abuts the opposite wall of the groove 30 relative axial movement between the ferrule 2 and socket 6 is prevented. As can be noted the plug can easily be removed from the socket and is of simple design, yet rugged and foolproof in actual operation.
While there have been illustrated and described fundamental novel features of the invention, it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.
We claim:
1. For use to connect electrically with a socket having an internal annular reress, a metallic plug having a plurality of detent projections or resilient cooperation with said recess to retain the plug in the socket, said projections being offset from one another along the insertion axis of the plug for sequential depression thereof upon insertion and Withdrawal of the plug into and from the socket, the maximum axial spacing of the projections being less than the width of the recess in which it is intended to engage, each projection defining a tapered surface inclined towards the longitudinal axis of the plug in the insertion direction thereof which merges into another tapered surface extending in an opposite direction with respect to said first-mentioned tapered surface, the inclined surface of the projection nearest the insertion end of the plug adapted to wedgingly engage an interior Wall portion of the socket adjacent said recess, the other tapered surface of the other projection adapted to engage said recess.
2. An electrical connector comprising a socket having an internal annular recess, a plug receivable in said socket and including a ferrule for crimping about an electrical lead wire and a pair of opposed tongues disposed for independent resilient depression, a detent rib on each of said tongues defining a pair of detent ribs cooperable with said recess to retain the plug in the socket, one rib being offset from another along the insertion axis of the plug for sequential depression thereof upon withdrawal of the plug from the socket, the axial spacing of said ribs being less than the width of said recess, the detent rib nearest the insertion end of the plug having a tapered surface inclined towards the longitudinal axis of the plug in the insertion direction thereof for Wedging engagement with the interior surface of the socket, and the other detent rib having a surface facing oppositely to the insertion direction for resilient engagement With the recess to drive the inclined surface into tight Wedging engagement with the interior surface of the socket.
References Cited by the Examiner UNITED STATES PATENTS 1,233,031 7/1917 Cook 339183 1,835,000 12/1931 Berthold 339256 1,926,163 9/1933 Mohr 339 X 2,246,901 6/1941 Schwarzmann 339100 X 2,463,826 3/ 1949 Thacker. 2,651,025 9/1953 Elliott 339-97 2,917,612 12/1959 Chabot 339258 2,948,877 8/1960 Batcheller 339256 X 3,002,170 9/1961 Clouthier 339217 X 3,077,523 2/1963 Clewes 339256 X FOREIGN PATENTS 1,193,096 4/1959 France.
347,081 1/ 1922 Germany.
327,553 4/1930 Great Britain.
437,546 10/1935 Great Britain.
JOSEPH D. SEERS, Primary Examiner.

Claims (1)

1. FOR USE TO CONNECT ELECTRICALLY WITH A SOCKET HAVING AN INTERNAL ANNULAR RECESS, A METALLIC PLUG HAVING A PLURALITY OF DETENT PROJECTIONS OR RESILIENT COOPERATION WITH SAID RECESS TO RETAIN THE PLUG IN THE SOCKET, SAID PROJECTIONS BEING OFFSET FROM ONE ANOTHER ALONG THE INSERTION AXIS OF THE PLUG FOR SEQUENTIAL DEPRESSION THEREOF UPON INSERTION AND WITHDRAWAL OF THE PLUG INTO AND FROM THE SOCKET, THE MAXIMUM AXIAL SPACING OF THE PROJECTIONS BEING LESS THAN THE WIDTH OF THE RECESS IN WHICH IT IS INTENDED TO ENGAGE, EACH PROJECTION DEFINING A TAPERED SURFACE INCLINED TOWARDS THE LONGITUDINAL AXIS OF THE PLUG IN THE INSERTION DIRECTION THEREOF WHICH MERGES INTO ANOTHER TAPERED SURFACE EXTENDING IN AN OPPOSITE DIRECTION WITH RESPECT TO SAID FIRST-MENTIONED TAPERED SURFACE, THE INCLINED SURFACE OF THE PROJECTION NEAREST THE INSERTION END OF THE PLUG ADAPTED TO WEDGINGLY ENGAGE AN INTERIOR WALL PORTION OF THE SOCKET ADJACENT SAID RECESS, THE OTHER TAPERED SURFACE OF THE OTHER PROJECTION ADAPTED TO ENGAGE SAID RECESS.
US175696A 1961-02-27 1962-02-26 Electrical plug and socket connectors Expired - Lifetime US3223961A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA16331U DE1830471U (en) 1961-02-27 1961-02-27 ELECTRIC PLUG-IN COUPLING.

Publications (1)

Publication Number Publication Date
US3223961A true US3223961A (en) 1965-12-14

Family

ID=32968947

Family Applications (1)

Application Number Title Priority Date Filing Date
US175696A Expired - Lifetime US3223961A (en) 1961-02-27 1962-02-26 Electrical plug and socket connectors

Country Status (7)

Country Link
US (1) US3223961A (en)
JP (1) JPS3913879B1 (en)
CH (1) CH384667A (en)
DE (1) DE1830471U (en)
FR (1) FR1320252A (en)
GB (1) GB929168A (en)
NL (1) NL274409A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312930A (en) * 1965-02-10 1967-04-04 Amp Inc Terminal pin assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259874A (en) * 1963-01-17 1966-07-05 Amp Inc Insulation piercing electrical connectors
GB2139018B (en) * 1983-04-29 1986-10-08 Amp Inc Coaxial plug and jack connectors
FR2627018B1 (en) * 1988-02-04 1990-08-03 Electricfil ELECTRICAL CONNECTION PLUG

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1233031A (en) * 1915-01-15 1917-07-10 Cook Frank B Co Connecting-plug.
DE347081C (en) * 1921-02-24 1922-01-13 Schlesinger Fa P Quick screw socket for electric light bulbs
GB327553A (en) * 1929-03-19 1930-04-10 A P Lundberg And Sons Ltd Improvements in or in connection with the contact tubes of electrical connectors, wall sockets and the like
US1835000A (en) * 1929-07-09 1931-12-08 Rajah Company Electrical connecter
US1926163A (en) * 1928-12-14 1933-09-12 Packard Electric Corp Cable terminal
GB437546A (en) * 1934-07-31 1935-10-31 Louis Henry Reid Improvements in or connected with sockets used for electrical connections
US2246901A (en) * 1940-11-23 1941-06-24 American Bosch Corp Distributor cable connector
US2463826A (en) * 1944-02-15 1949-03-08 James H Cannon Coupler and terminal block
US2651025A (en) * 1949-10-26 1953-09-01 Gen Motors Corp Electrical connection for distributors
FR1193096A (en) * 1958-03-06 1959-10-30 Equip S G E Pour L Automobile Connection device for internal combustion engine ignition circuits
US2917612A (en) * 1957-11-25 1959-12-15 Ite Circuit Breaker Ltd Plug in disconnects
US2948877A (en) * 1956-10-12 1960-08-09 Kent Mfg Corp Electrical connector member with t-split floor
US3002170A (en) * 1959-12-21 1961-09-26 Robert G Clouthier Electronic data processing machine control panel and electrical contact therefor
US3077523A (en) * 1959-07-20 1963-02-12 United Carr Fastener Corp Electrical sockets

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1233031A (en) * 1915-01-15 1917-07-10 Cook Frank B Co Connecting-plug.
DE347081C (en) * 1921-02-24 1922-01-13 Schlesinger Fa P Quick screw socket for electric light bulbs
US1926163A (en) * 1928-12-14 1933-09-12 Packard Electric Corp Cable terminal
GB327553A (en) * 1929-03-19 1930-04-10 A P Lundberg And Sons Ltd Improvements in or in connection with the contact tubes of electrical connectors, wall sockets and the like
US1835000A (en) * 1929-07-09 1931-12-08 Rajah Company Electrical connecter
GB437546A (en) * 1934-07-31 1935-10-31 Louis Henry Reid Improvements in or connected with sockets used for electrical connections
US2246901A (en) * 1940-11-23 1941-06-24 American Bosch Corp Distributor cable connector
US2463826A (en) * 1944-02-15 1949-03-08 James H Cannon Coupler and terminal block
US2651025A (en) * 1949-10-26 1953-09-01 Gen Motors Corp Electrical connection for distributors
US2948877A (en) * 1956-10-12 1960-08-09 Kent Mfg Corp Electrical connector member with t-split floor
US2917612A (en) * 1957-11-25 1959-12-15 Ite Circuit Breaker Ltd Plug in disconnects
FR1193096A (en) * 1958-03-06 1959-10-30 Equip S G E Pour L Automobile Connection device for internal combustion engine ignition circuits
US3077523A (en) * 1959-07-20 1963-02-12 United Carr Fastener Corp Electrical sockets
US3002170A (en) * 1959-12-21 1961-09-26 Robert G Clouthier Electronic data processing machine control panel and electrical contact therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3312930A (en) * 1965-02-10 1967-04-04 Amp Inc Terminal pin assembly

Also Published As

Publication number Publication date
JPS3913879B1 (en) 1964-07-17
GB929168A (en) 1963-06-19
CH384667A (en) 1964-11-30
FR1320252A (en) 1963-03-08
DE1830471U (en) 1961-05-04
NL274409A (en)

Similar Documents

Publication Publication Date Title
US3178674A (en) Electrical connector
US3971613A (en) Electrical housing member
US3083345A (en) Electrical connector
US5470258A (en) Electrical connector
JP4097589B2 (en) Cable connector
US3380013A (en) Clip connector terminal for insulated conductors
US4806120A (en) Electrical terminal
KR100359465B1 (en) Electric terminal
US3597723A (en) Spark plug terminal
US3120990A (en) Electrical connector and connection
US3530429A (en) Electrical tab connector
US6752667B2 (en) Electrical connection element and a housing for an electrical connection element
US3829820A (en) Plug and socket connector
US3381262A (en) Device for the protection of the elastic member of a coupling
US3223961A (en) Electrical plug and socket connectors
EP0101290B1 (en) Multigauge insulation displacement connector and contacts therefor
US4272149A (en) One piece socket type electrical contacts
USRE26721E (en) One piece plugboard plug connector
US2129725A (en) Socket for vacuum tubes, etc.
US3054979A (en) Multiple electrical connector
US3426320A (en) Electrical connector receptacle
US1970767A (en) Cable terminal
JPH0711778U (en) Waterproof plug and wire terminal with waterproof plug
US3634818A (en) Female electrical terminal
US2055329A (en) Electrical connecter