GB2160716A - Electrical pin - Google Patents

Electrical pin Download PDF

Info

Publication number
GB2160716A
GB2160716A GB08415685A GB8415685A GB2160716A GB 2160716 A GB2160716 A GB 2160716A GB 08415685 A GB08415685 A GB 08415685A GB 8415685 A GB8415685 A GB 8415685A GB 2160716 A GB2160716 A GB 2160716A
Authority
GB
United Kingdom
Prior art keywords
contact portion
sleeve member
pin
electrical
contact
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.)
Granted
Application number
GB08415685A
Other versions
GB2160716B (en
GB8415685D0 (en
Inventor
Arthur Bates
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.)
BSR
Original Assignee
BSR
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 BSR filed Critical BSR
Priority to GB08415685A priority Critical patent/GB2160716B/en
Publication of GB8415685D0 publication Critical patent/GB8415685D0/en
Publication of GB2160716A publication Critical patent/GB2160716A/en
Application granted granted Critical
Publication of GB2160716B publication Critical patent/GB2160716B/en
Expired legal-status Critical Current

Links

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
    • H01R13/44—Means for preventing access to live contacts
    • 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
    • H01R13/04—Pins or blades for co-operation with sockets

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)

Abstract

An electrical pin for an electrical plug includes a contact portion 14 for engagement in use with a contact element of a socket, a connector portion for connection to a cable and an intermediate portion 18 effecting electrical connection between the contact and connector portions. The axis of the intermediate portion is offset from the axis of the pin and the intermediate portion is surround by an electrically insulating sleeve 19. A projection 22 on the sleeve engages in a recess 21 in the contact portion to prevent relative angular movement between the sleeve and the contact portion, the surfaces of the contact portion 14 and sleeve 19 being continuous. <IMAGE>

Description

SPECIFICATION Electrical pin This invention relates to electrical pins for electrical plugs.
It is desirable to provide at least on the socalled live pin of an electrical plug, an electrically insulating sleeve which extends from the casing of the plug to a position spaced from the free end of the pin. The idea is that when the plug is engaged with a socket, the accessible portion of the live pin prior to full engagement of the plug with the socket, will not expose a live surface once the pin has made contact with a contact element of the socket. In this manner the risk of electric shock is minimised.
The object of the present invention is to provide an electrical pin for a plug in a simple and convenient form.
According to the invention an electrical pin for an electrical plug comprises in combination, a contact portion having a rectangular section, the contact portion in use engaging a contact element of a socket, a connector portion adapted to have an electrical connection made thereto, said connector portion in use being housed within the casing of the plug, an intermediate portion serving to electrically connect the contact portion and the connector portion, said intermediate portion extending parallel to the longitudinal axis of said contact portion but offset relative thereto, and a sleeve member formed from electrically insulating material, said sleeve member defining an elongated bore through which said intermediate portion is passed during assembly of the pin, and interengaging means on said sleeve member and said contact portion to prevent relative angular movement of the contact portion and sleeve member, said sleeve member having a section corresponding to that of the contact portion whereby the surfaces of said sleeve member and said contact portion are continuous.
In the accompanying drawings: Figure 1 is a part sectional side elevation of a portion of an electrical plug with a pin constructed in accordance with the invention in position, Figure 2 is a perspective view of the pin prior to its assembly in the casing of the plug, Figure 3 is a perspective view showing components of the pin during assembly, and Figure 4 shows a modification.
Referring to Figs. 1, 2 and 3 of the drawings the electrical plug comprises a base portion 10 and a cover portion 11 which is secured to the base portion in a well known manner, by means of a retaining screw. The base portion defines a recess 1 2 from the base wall of which extends an aperture 1 3.
The recess and aperture accommodate the pin constructed as will be described.
The pin comprises a contact portion 1 4 which is of rectangular section having its larger side walls tapered to facilitate engagement of the contact portion with contact elements in a socket. The pin also includes a connector portion 1 5 which in the particular example, is provided with a bore 1 6 to receive an electrical conductor. A retaining screw 1 7 is provided to secure the conductor within the bore.
In order to effect an electrical connection between the contact portion 14 and the connector portion 15, an intermediate portion 1 8 is provided, this being of cylindrical form and formed integrally with the contact portion.
The ends of the intermediate portion are of reduced diameter to enable it to be secured within complementary drillings formed in the contact portion and connector portion although as shown in Fig. 1, the intermediate portion 1 8 may be formed integrally with the contact portion 14.
The longitudinal axis of the intermediate portion 1 8 is parallel to but offset from the longitudinal axis of the contact portion 14 and engageable with the intermediate portion is a sleeve member 1 9 in which is formed an elongated bore 20 through which the intermediate portion 1 8 passes. The sleeve member is formed from electrically insulating material and its cross-section over substantially the whole of its length, is the same as that of the contact portion.In order to locate the sleeve 1 9 against angular movement relative to the contact portion 1 4 so that the surfaces of the sleeve member and the contact portion remain in alignment, the contact portion and the sleeve member are provided with interengaging means which in the example shown in Figs. 1-3, comprises a blind bore 21 formed in the contact portion and an integral peg 22 formed on the end surface of the sleeve member. When the peg is engaged in the bore, the sleeve member and contact portion are restrained against angular movement and the surfaces of the contact portion and sleeve member are continuous.
Fig. 4 shows a modification to the interengaging means in which the contact portion 14 is provided with a shallow groove 23 in which is engaged a complementary rib 24 formed on the sleeve member 1 9.
As shown in Figs. 1-3, the sleeve member 1 9 defines a pair of lateral projections 25 and these projections abut the base wall of the recess 1 2. If desired projections can also be formed on the other two sides of the sleeve member.
Conveniently the reduced end of the intermediate member 1 8 is secured within the connector portion 1 5 by a riveting operation.
1. An electrical pin for an electrical plug comprising in combination a contact portion
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Electrical pin This invention relates to electrical pins for electrical plugs. It is desirable to provide at least on the socalled live pin of an electrical plug, an electrically insulating sleeve which extends from the casing of the plug to a position spaced from the free end of the pin. The idea is that when the plug is engaged with a socket, the accessible portion of the live pin prior to full engagement of the plug with the socket, will not expose a live surface once the pin has made contact with a contact element of the socket. In this manner the risk of electric shock is minimised. The object of the present invention is to provide an electrical pin for a plug in a simple and convenient form. According to the invention an electrical pin for an electrical plug comprises in combination, a contact portion having a rectangular section, the contact portion in use engaging a contact element of a socket, a connector portion adapted to have an electrical connection made thereto, said connector portion in use being housed within the casing of the plug, an intermediate portion serving to electrically connect the contact portion and the connector portion, said intermediate portion extending parallel to the longitudinal axis of said contact portion but offset relative thereto, and a sleeve member formed from electrically insulating material, said sleeve member defining an elongated bore through which said intermediate portion is passed during assembly of the pin, and interengaging means on said sleeve member and said contact portion to prevent relative angular movement of the contact portion and sleeve member, said sleeve member having a section corresponding to that of the contact portion whereby the surfaces of said sleeve member and said contact portion are continuous. In the accompanying drawings: Figure 1 is a part sectional side elevation of a portion of an electrical plug with a pin constructed in accordance with the invention in position, Figure 2 is a perspective view of the pin prior to its assembly in the casing of the plug, Figure 3 is a perspective view showing components of the pin during assembly, and Figure 4 shows a modification. Referring to Figs. 1, 2 and 3 of the drawings the electrical plug comprises a base portion 10 and a cover portion 11 which is secured to the base portion in a well known manner, by means of a retaining screw. The base portion defines a recess 1 2 from the base wall of which extends an aperture 1 3. The recess and aperture accommodate the pin constructed as will be described. The pin comprises a contact portion 1 4 which is of rectangular section having its larger side walls tapered to facilitate engagement of the contact portion with contact elements in a socket. The pin also includes a connector portion 1 5 which in the particular example, is provided with a bore 1 6 to receive an electrical conductor. A retaining screw 1 7 is provided to secure the conductor within the bore. In order to effect an electrical connection between the contact portion 14 and the connector portion 15, an intermediate portion 1 8 is provided, this being of cylindrical form and formed integrally with the contact portion. The ends of the intermediate portion are of reduced diameter to enable it to be secured within complementary drillings formed in the contact portion and connector portion although as shown in Fig. 1, the intermediate portion 1 8 may be formed integrally with the contact portion 14. The longitudinal axis of the intermediate portion 1 8 is parallel to but offset from the longitudinal axis of the contact portion 14 and engageable with the intermediate portion is a sleeve member 1 9 in which is formed an elongated bore 20 through which the intermediate portion 1 8 passes. The sleeve member is formed from electrically insulating material and its cross-section over substantially the whole of its length, is the same as that of the contact portion.In order to locate the sleeve 1 9 against angular movement relative to the contact portion 1 4 so that the surfaces of the sleeve member and the contact portion remain in alignment, the contact portion and the sleeve member are provided with interengaging means which in the example shown in Figs. 1-3, comprises a blind bore 21 formed in the contact portion and an integral peg 22 formed on the end surface of the sleeve member. When the peg is engaged in the bore, the sleeve member and contact portion are restrained against angular movement and the surfaces of the contact portion and sleeve member are continuous. Fig. 4 shows a modification to the interengaging means in which the contact portion 14 is provided with a shallow groove 23 in which is engaged a complementary rib 24 formed on the sleeve member 1 9. As shown in Figs. 1-3, the sleeve member 1 9 defines a pair of lateral projections 25 and these projections abut the base wall of the recess 1 2. If desired projections can also be formed on the other two sides of the sleeve member. Conveniently the reduced end of the intermediate member 1 8 is secured within the connector portion 1 5 by a riveting operation. CLAIMS
1. An electrical pin for an electrical plug comprising in combination a contact portion having a rectangular section, the contact portion in use engaging a contact element of a socket, a connector portion adapted to have an electrical connection made thereto, said connector portion in use being housed within the casing of the plug, an intermediate portion serving to electrically connect the contact portion and the connector portion, said intermediate portion extending parallel to the longitudinal axis of said contact portion but offset relativel thereto, and a sleeve member formed from electrically insulating material, said sleeve member defining an elongated bore through which said intermediate portion is passed during assembly of the pin, and interengaging means on said sleeve member and said contact portion to prevent relative angular movement of the contact portion and sleeve member, said sleeve member having a section corresponding to that of the contact portion whereby the surfaces of said sleeve member and said contact portion are continuous.
2. An electrical pin as claimed in Claim 1 in which said interengaging means comprises a rib or projection on the end face of the sleeve member presented to the contact portion and a complementary groove or blind bore formed in the contact portion.
3. An electrical pin as claimed in Claim 1 or Claim 2 in which said sleeve member is provided with laterial projections at its end adjacent the connector portion, said ears in use being located against the base wall of a recess in the base portion of the plug.
4. An electrical pin as claimed in any one of the preceding claims in which the intermediate portion is integrally formed with the contact portion and is secured to the connector portion by a riveting operation.
5. An electrical pin for an electrical plug substantially as hereinbefore described with reference to the accompanying drawings.
GB08415685A 1984-06-20 1984-06-20 Electrical pin Expired GB2160716B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08415685A GB2160716B (en) 1984-06-20 1984-06-20 Electrical pin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08415685A GB2160716B (en) 1984-06-20 1984-06-20 Electrical pin

Publications (3)

Publication Number Publication Date
GB8415685D0 GB8415685D0 (en) 1984-07-25
GB2160716A true GB2160716A (en) 1985-12-24
GB2160716B GB2160716B (en) 1987-08-12

Family

ID=10562690

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08415685A Expired GB2160716B (en) 1984-06-20 1984-06-20 Electrical pin

Country Status (1)

Country Link
GB (1) GB2160716B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006131489A1 (en) * 2005-06-07 2006-12-14 Siemens Aktiengesellschaft Contact apparatus for minimizing the load of mechanically loaded smt soldered joints

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006131489A1 (en) * 2005-06-07 2006-12-14 Siemens Aktiengesellschaft Contact apparatus for minimizing the load of mechanically loaded smt soldered joints
US7690929B2 (en) 2005-06-07 2010-04-06 Siemens Aktiengesellschaft Contact apparatus for minimizing the load of mechanically loaded SMT soldered joints

Also Published As

Publication number Publication date
GB2160716B (en) 1987-08-12
GB8415685D0 (en) 1984-07-25

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee