GB2083293A - Penetrating screw - Google Patents

Penetrating screw Download PDF

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Publication number
GB2083293A
GB2083293A GB8028010A GB8028010A GB2083293A GB 2083293 A GB2083293 A GB 2083293A GB 8028010 A GB8028010 A GB 8028010A GB 8028010 A GB8028010 A GB 8028010A GB 2083293 A GB2083293 A GB 2083293A
Authority
GB
United Kingdom
Prior art keywords
main body
screw
penetrating
penetrating device
electrical
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
GB8028010A
Other versions
GB2083293B (en
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.)
LIAN HUANG LIU
Original Assignee
LIAN HUANG LIU
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 LIAN HUANG LIU filed Critical LIAN HUANG LIU
Priority to GB8028010A priority Critical patent/GB2083293B/en
Publication of GB2083293A publication Critical patent/GB2083293A/en
Application granted granted Critical
Publication of GB2083293B publication Critical patent/GB2083293B/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
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2475—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts
    • H01R4/2483—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts penetrating the area under the screw tip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw
    • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw
    • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
    • H01R4/366—Conductive members located under tip of screw with intermediate part between tip and conductive member intermediate part attached to the tip of the screw

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Abstract

A screw comprises a threaded main body (50) having an insulating layer (51) provided at the head thereof, and a penetrating device (53) having a plurality of pointed teeth (56) for wire clamping and insulation piercing. The penetrating device (53) may be mounted rotatably on a connecting rod (52) inserted through a hole (55) in the penetrating device (53) into a socket (54, Fig. 7, not shown) of the main body (50). The screw can be used in conventional screw terminal electrical apparatus (e.g. Fig. 1, not shown). <IMAGE>

Description

SPECIFICATION Penetrating screw This invention relates to a novel screw for mounting on an electrical apparatus, such as a plug, by which electrical wires can be easily connected with the inner end of prongs of the electrical plug to form a good electrical connection without peeling off a partial of insulated skin of the electrical wires.
Conventionally, wires which are used to connect with an electrical apparatus, such as a plug, are firstly peeled off one end of its insulated skin wrapped around a conductive metal core so as to make the metal core being able to contact electrically with the apparatus.
The peeling of the skin is troublesome and needs a special hand tool such as a nipper or a knife. Furthermore, the conductive metal core is easily cut off during the peeling operation. Thus, the Taiwan Pat. No. 5030 discloses a safety plug as shown in Fig. 1 in which the inner end of two prongs 20 are provided with an outward pointed teeth edge 21 for penetrating into the insulated skin of an electrical wire, which is placed between the pointed teeth edge and a screw 22, and for contacting with the metal core of the wire, when the electrical wire is pressed tightly by turning the screw.
Although the safety plug provides an advantage of not needing be peeled off the skin of the wire, it still can not fulfil the requirements of good contact because of the small contacting area between the pointed teeth edge and the metal core of the wire.
Figs. 2 to 4 show respectively different kinds of conventional apparatus such as a terminal board or a plug. To connect them to the electircal source, one end of the skin of the wires has to be peeled off firstly. Consequently, it is still desired to provide an improved device, by which wires need not be peeled off its skin to connect with an electrical appartus, in the art.
In accordance with the present invention there is provided a novel screw, which can be mounted on the conventional electrical apparatus, comprising a threaded main body having an insulating layer provided at the head thereof, and a socket located at its lower end; a detachable penetrating device having a plurality of pointed teeth, and a through-hole locted preferably at its centrai portion; and a connecting rod for inserting through the hole of the penetrating device into the socket of the main body so as to mount the penetrating device on the main body rotatably. According to this invention the penetrating device provides a relative large contacting area when it penetrates into the insulated skin and contacts with the metal core of the electrical wire by turning the main body.
After the penetrating device penetrates and contacts with the electrical wire, the screw of the invention is preferably connected electrically with the known electrical apparatus.
Accordingly, a main object of the present invention is to provide a novel screw, which is provided with a plurality of pointed teeth, adapted to mount on a known plug so as to make the plug connecting wires easily without peeling off the skin of the wires.
It is another object of the present invention to provide a screw having a reative large conductive area when it penetrates into the skin of and contacts with the metal core of the wire.
These and other objects of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.
Figure 1 is an exploded perspective view of an electrical plug disclosed in the Taiwan Pat.
No. 5030; Figure 2 is a sectional view of a known electrical plug; Figure 3 is a sectional view of a known electrical terminal board; Figure 4 is a sectional view of another conventional electrical terminal board; Figure 5 is a sectional view of an embodiment of the invention; Figure 6 is perspective with partial exploded view of the embodiment shown in Fig. 5; Figure 7 is a partial enlarged perspective with exploded view of the main body as shown in Figs. 5 and 6; and Figure 8 is a sectional view of another embodiment of the invention showing how it is screwed into an electrical plate.
Referring now to Figs. 5 to 7 there is shown a preferred embodiment of the present invention in which a screw consisting of a threaded cylindrical main body 50, a connecting rod 52, and a detachable penetrating device 53. On the upper end of the main body 50 there is provided with an insulating layer 51 so as to avoid to occur any shortage during using of the screw. At the lower end of the main body 50 has a socket 54 (as best shown in Fig. 7) which is used to receive tightly a part of the connecting rod 52. The penetrating device 53 is in the form of a cylindrical cap, and has a plurality of pointed teeth 56 surrounded on its circular lower end, and an opening 55 provided at the center of its top surface. One end of the connecting rod 52 is provided with a head 57 whose diameter is larger than that of the opening 55.
However, the diameter of the shank of the connecting rod 57 is smaller than that of the opening 55 so that the penetrating device 53 can be mounted slidably on the threaded main body 50 by inserting a part of the shank of the connecting rod 52 into the socket 54 of the main body 50.
Fig. 8 shows another preferred embodiment of the invention in which the diameter of the cylindrical penetrating device 80 is larger than that of the main body 81. At central portion of the underside of the main body is provided with a protrusion 82 having a socket therein for receiving the whole shank of the connecting rod 83. The diameter of the opening 84 provided at the top surface of the penetrating device 80 is smaller than that of the head of the connecting rod 83 but is larger than that of the protrusion 82. Thus, in using the screw the main body 81 is firstly screwed into the object, and then, the penetrating device 80 is mounted slidably on the protrusion 82 by inserting the shank of the connecting rod 85 through the opening of the penetrating device 80 into the socket of the main body.
In operation, while the penetrating device contacts initially to the insulated skin of the electrical wire by turning the main body, it will not rotate with the main body but instead moved downwards against the underside of the main body to penetrate the insulated skin of the electrical wire.
It is to understood that various modifications may be made therein, and it is intended to cover in the appended claims all such modifications as fall within the true spirit and scope of the invention.

Claims (5)

1. A screw for mounting on an electrical apparatus by which electrical wire can be easily electrically connected with the apparatus, comprising: a threaded cylindrical main body having at least an insulated layer provided on the head thereof, and a connecting device provided at the underside thereof, and a cylindrical penetrating device, mounted detachably on said connecting device, having a plurality of pointed teeth located at the lower end thereof for penetrating into the insulated skin of the electrical wire.
2. A screw as claimed in claim 1 wherein the diameter of said penetrating device is smaller than that of said main body.
3. A screw as claimed in claim 1 wherein the diameter of said penetrating device is larger than that of the main body.
4. A screw for mounting on an electrical apparatus by which electrical wire can be easily electrically connected with the apparatus, comprising: a threaded cylindrical main body having at least an insulated layer provided on the head thereof, and a socket provided at the underside thereof; a penetrating deivce having a plurality of pointed teeth surrounded on its lower end for penetrating into the skin of the wire, and an opening provided at the center of top surface thereof; and a connecting rod for inserting through lh() opening of said penetrating device into th( socket of said main body whereby said penetrating device can be mounted slidably on said main body.
5. A screw for mounting on an electrical apparatus substantially as hereinbefore described with reference to the accompanying drawings.
GB8028010A 1980-08-29 1980-08-29 Penetrating-screw Expired GB2083293B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8028010A GB2083293B (en) 1980-08-29 1980-08-29 Penetrating-screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8028010A GB2083293B (en) 1980-08-29 1980-08-29 Penetrating-screw

Publications (2)

Publication Number Publication Date
GB2083293A true GB2083293A (en) 1982-03-17
GB2083293B GB2083293B (en) 1985-03-20

Family

ID=10515729

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8028010A Expired GB2083293B (en) 1980-08-29 1980-08-29 Penetrating-screw

Country Status (1)

Country Link
GB (1) GB2083293B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552428A (en) * 1982-06-02 1985-11-12 Liu Ling H Electrical plug
GB2183403A (en) * 1985-09-27 1987-06-03 Allied Corp Electrical connection devices
GB2195837A (en) * 1986-10-01 1988-04-13 Clive Dickson Robinson Electrical earth connector
EP0298713A2 (en) * 1987-07-07 1989-01-11 Raychem Corporation Terminal block and adaptor
US4971573A (en) * 1988-09-19 1990-11-20 Raychem Corporation Electrical connection device providing integral strain relief
US5069636A (en) * 1987-07-07 1991-12-03 Raychem Corporation Terminal block and adapter
EP2451011A1 (en) * 2010-11-03 2012-05-09 Nexans Assembly for connecting electric cables

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552428A (en) * 1982-06-02 1985-11-12 Liu Ling H Electrical plug
GB2183403A (en) * 1985-09-27 1987-06-03 Allied Corp Electrical connection devices
US4699442A (en) * 1985-09-27 1987-10-13 Amphenol Corporation Electrical connection devices
GB2195837A (en) * 1986-10-01 1988-04-13 Clive Dickson Robinson Electrical earth connector
GB2195837B (en) * 1986-10-01 1991-01-30 Clive Dickson Robinson Electrical earth connector
EP0298713A2 (en) * 1987-07-07 1989-01-11 Raychem Corporation Terminal block and adaptor
EP0298713A3 (en) * 1987-07-07 1990-05-23 Raychem Corporation Terminal block and adaptor
US5069636A (en) * 1987-07-07 1991-12-03 Raychem Corporation Terminal block and adapter
AU618539B2 (en) * 1987-07-07 1992-01-02 Raychem Corporation Terminal block and adaptor
US4971573A (en) * 1988-09-19 1990-11-20 Raychem Corporation Electrical connection device providing integral strain relief
EP2451011A1 (en) * 2010-11-03 2012-05-09 Nexans Assembly for connecting electric cables

Also Published As

Publication number Publication date
GB2083293B (en) 1985-03-20

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Legal Events

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