CA1134001A - Penetrating screw - Google Patents
Penetrating screwInfo
- Publication number
- CA1134001A CA1134001A CA358,961A CA358961A CA1134001A CA 1134001 A CA1134001 A CA 1134001A CA 358961 A CA358961 A CA 358961A CA 1134001 A CA1134001 A CA 1134001A
- Authority
- CA
- Canada
- Prior art keywords
- main body
- penetrating
- screw
- 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.)
- Expired
Links
Landscapes
- Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
Abstract
PENETRATING SCREW
ABSTRACT
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 located preferrably at its central 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.
ABSTRACT
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 located preferrably at its central 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.
Description
~ 6~
This invention relates to a novel screw for mounting on an electrical apparatus, such as a plug, by which elec-trical 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 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. Further dis-advantages associated with the prior art will be discussedhereinafter in connection with the drawings.
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 thereo~, and a socket located at its lo~er end; a detachable pene-trating device having a plurality of pointed teeth, and a through~hole located preferably at its central portion, and a connecting rod for inserting through the hole of the pene-trating device into the socket of the main body so as tomount the penetrating device on the main body rotatably.
According to this invention, the penetrating device provides B ~ .
. . .
~ 3~ 3~
a relatively large contacting area when it penetrates into the insulated skin and contacts with the metal core of the elec~
trical wire by turning the main body.
After the penetrating device penetrates and contacts S 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 relatively 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 accompany-ing drawings, in which:
FIG. 1 is an exploded erspective view o~ an , ~t6~, electrical plug disclosed in ~.O.C-.~ ~ No. 5030, published March 1974 to Chuan Cheng;
FIG. 2 is a sectional view of a known electrical plug;
FIG. 3 is a sectional view of a known electrical terminal board;
FIG. 4 is a sectional view of another conventional electrical terminal board;
B -- 3 __ FIG. S is a sectional view of an emhodiment of the invention;
FIG. 6 is a perspective with partial exploded view of the embodiment shown in Fig. 5;
FIG. 7 is a partial enlarged perspective with exploded view of the main body as shown in Figs. 5 and ~; and FIG. 8 is a sectional view of another embodiment of the invention showing how it is screwed into an electrical plate. ~ ~ c~f.,~
Referring to the drawings in greater detail, .~o~.e~
Pat. No. 5030, published March 1974 to Chuan Cheng, 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 the skin to be peeled off of the wire, it still cannot fulfill the requirements of good contact because of the small con~acting area between the pointed teeth edge and the metal core of the wire.
~ Figs. 2 to 4 show respectively different kinds of ;~ conventlonal apparatus such as a terminal board or a plug.
To connect them to the electrical source, one end of the skin of the wires has to be peeled off firstly. Conseqently, it is still desired to provide an improved device, by which the skin of the wires need not bé peeled off to connect with an electrical apparatus, in -the art.
B 4 __ , : . ~ .
.
.
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DETAILED DESC~IPTION OF T~IE PP,EFERPED EMBODI~qENTS
Referring now to Figs. 5 to 7 there is shown 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 ~0 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 - 15 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 o~ the shank of the connecting rod 52 into the socket 54 of the main body 50.
Fig. 8 shows another preierred embodiment of 25 lJ 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 conDecting rod ~3. The diameter of the opening g4 provided at -the top surface of the penetrating device 80 is smaller than -that o~ -the head of the connecting rod 83 but is l.arger than that of the protrusion B2.
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 ~0 socket of the main body.
In operation, while the penetrating de~ice contacts initially to the insulated skin of the electrical wire by turning the main body, it will not rotate with the main ~ody but instead moved downwards against the underside of -the main body to penetrate the insulated skin of.the electrical wire.
It is to be 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.
~ ' :
: ' ~
. - . .
. . - .
. - .
This invention relates to a novel screw for mounting on an electrical apparatus, such as a plug, by which elec-trical 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 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. Further dis-advantages associated with the prior art will be discussedhereinafter in connection with the drawings.
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 thereo~, and a socket located at its lo~er end; a detachable pene-trating device having a plurality of pointed teeth, and a through~hole located preferably at its central portion, and a connecting rod for inserting through the hole of the pene-trating device into the socket of the main body so as tomount the penetrating device on the main body rotatably.
According to this invention, the penetrating device provides B ~ .
. . .
~ 3~ 3~
a relatively large contacting area when it penetrates into the insulated skin and contacts with the metal core of the elec~
trical wire by turning the main body.
After the penetrating device penetrates and contacts S 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 relatively 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 accompany-ing drawings, in which:
FIG. 1 is an exploded erspective view o~ an , ~t6~, electrical plug disclosed in ~.O.C-.~ ~ No. 5030, published March 1974 to Chuan Cheng;
FIG. 2 is a sectional view of a known electrical plug;
FIG. 3 is a sectional view of a known electrical terminal board;
FIG. 4 is a sectional view of another conventional electrical terminal board;
B -- 3 __ FIG. S is a sectional view of an emhodiment of the invention;
FIG. 6 is a perspective with partial exploded view of the embodiment shown in Fig. 5;
FIG. 7 is a partial enlarged perspective with exploded view of the main body as shown in Figs. 5 and ~; and FIG. 8 is a sectional view of another embodiment of the invention showing how it is screwed into an electrical plate. ~ ~ c~f.,~
Referring to the drawings in greater detail, .~o~.e~
Pat. No. 5030, published March 1974 to Chuan Cheng, 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 the skin to be peeled off of the wire, it still cannot fulfill the requirements of good contact because of the small con~acting area between the pointed teeth edge and the metal core of the wire.
~ Figs. 2 to 4 show respectively different kinds of ;~ conventlonal apparatus such as a terminal board or a plug.
To connect them to the electrical source, one end of the skin of the wires has to be peeled off firstly. Conseqently, it is still desired to provide an improved device, by which the skin of the wires need not bé peeled off to connect with an electrical apparatus, in -the art.
B 4 __ , : . ~ .
.
.
`
, . . ` ' ' ' ' ' `
0~
DETAILED DESC~IPTION OF T~IE PP,EFERPED EMBODI~qENTS
Referring now to Figs. 5 to 7 there is shown 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 ~0 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 - 15 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 o~ the shank of the connecting rod 52 into the socket 54 of the main body 50.
Fig. 8 shows another preierred embodiment of 25 lJ 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 conDecting rod ~3. The diameter of the opening g4 provided at -the top surface of the penetrating device 80 is smaller than -that o~ -the head of the connecting rod 83 but is l.arger than that of the protrusion B2.
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 ~0 socket of the main body.
In operation, while the penetrating de~ice contacts initially to the insulated skin of the electrical wire by turning the main body, it will not rotate with the main ~ody but instead moved downwards against the underside of -the main body to penetrate the insulated skin of.the electrical wire.
It is to be 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 (4)
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.
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 the opening of said penetrating device into the socket of said main body whereby said penetrating device can be mounted slidably on said main body.
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 the opening of said penetrating device into the socket of said main body whereby said penetrating device can be mounted slidably on said main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA358,961A CA1134001A (en) | 1980-08-22 | 1980-08-22 | Penetrating screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA358,961A CA1134001A (en) | 1980-08-22 | 1980-08-22 | Penetrating screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1134001A true CA1134001A (en) | 1982-10-19 |
Family
ID=4117729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA358,961A Expired CA1134001A (en) | 1980-08-22 | 1980-08-22 | Penetrating screw |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1134001A (en) |
-
1980
- 1980-08-22 CA CA358,961A patent/CA1134001A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 19991019 |