CA2018468A1 - Method for making insulated conductor elements for electrically connecting electrical units to electrical signal generator, and element obtained through the said method - Google Patents
Method for making insulated conductor elements for electrically connecting electrical units to electrical signal generator, and element obtained through the said methodInfo
- Publication number
- CA2018468A1 CA2018468A1 CA002018468A CA2018468A CA2018468A1 CA 2018468 A1 CA2018468 A1 CA 2018468A1 CA 002018468 A CA002018468 A CA 002018468A CA 2018468 A CA2018468 A CA 2018468A CA 2018468 A1 CA2018468 A1 CA 2018468A1
- Authority
- CA
- Canada
- Prior art keywords
- terminals
- sheath
- caps
- electric
- metal tip
- 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.)
- Abandoned
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/20—Coupling parts carrying sockets, clips or analogous contacts and secured only to wire or cable
-
- 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
-
- 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
- H01R13/46—Bases; Cases
- H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2101/00—One pole
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Manufacturing Of Electrical Connectors (AREA)
Abstract
METHOD FOR MAKING INSULATED CONDUCTOR ELEMENTS FOR
ELECTRICALLY CONNECTING ELECTRICAL UNITS TO
ELECTRICAL SIGNAL GENERATOR, AND ELEMENT OBTAINED
THROUGH THE SAID METHOD.
ABSTRACT OF THE DISCLOSURE
The method has been proposed for making an insulated conductor element consisting of a flexible component and electric conductor in conducting silicon rubber, consisting of a cylindrical shaped portion, whose ends are attached to terminals, and of an insulating flexible sheath, which is solid with and closely adheres to the cylindrical shaped portion, and which, by means of the corresponding caps, also closely surrounds the terminals, whereby, the terminals are designed for connection to corresponding metal tips used for electric units or generators of electric signals.
ELECTRICALLY CONNECTING ELECTRICAL UNITS TO
ELECTRICAL SIGNAL GENERATOR, AND ELEMENT OBTAINED
THROUGH THE SAID METHOD.
ABSTRACT OF THE DISCLOSURE
The method has been proposed for making an insulated conductor element consisting of a flexible component and electric conductor in conducting silicon rubber, consisting of a cylindrical shaped portion, whose ends are attached to terminals, and of an insulating flexible sheath, which is solid with and closely adheres to the cylindrical shaped portion, and which, by means of the corresponding caps, also closely surrounds the terminals, whereby, the terminals are designed for connection to corresponding metal tips used for electric units or generators of electric signals.
Description
METHOD FOR MA~ING INSU~ATED CO~DUCTOR ELENENTS FOR
EL~CTRICALLY CONNECTING ELECTRICAL UNITS TO
ELECTRIC~L SIGNAL OE NERATOR, AND ELEMENT OBTAINED
THROUGH T%E SAID M~THOD.
BACRGROUND OF TH~ INVENTION
The invention xelates to a method for making insulated conductor elements for electrically connecting electrical units to electrical signal generator.
The invention also relates to the elements obtained by using the claimed method.
DESCRIPTION OF TH~ PRIOR ART
It is known that in the current ignition systems being u~ed in combustion enginesr electricity flows from the generator of electric signals (such as coil~, distributors, or electronic ignition units) to the spark plug through an electric lead with a conducting core consisting of a thin copper or metal alloy wire, that is wound into a coil (constitu~ing an inductance to limit what is known as radio interference) on a cylindrical shaped insulated support.
The conducting core is covered with a sheath and/or one or more layers of insulating material. The ends of the core are fixed to metal tsrminals which, by means ef suitable metal tabs, are shaped in such a way as to make it possible for them to be fixed (connected) at the one end to the outer metal tang (metal tip) of the spark plug, and to be fixed at the other end to the corresponding metal tip to be found in the afore-mentioned generator of electric signals.
It is also known that metal terminals are normally electrically insulated by means of the sheath and caps, which are both made in natural or synthetic rubbers, or in plastic materials.
Therefore, each conductor element for transmitting electricity from the generator to the spark plug contains a metal core endpiece wound around its corresponding cylindrical shaped in~ulated support, which, in turn, is electrically insulated ~0~4~
(the lead), two metal terminals (one for each end of the core) and two insulated caps (one for each terminal of the conductor element). The final version of this invention consists of a plural number of separately produced components (lead, terminals, tabs, caps) that have been duly tested prior to assembly; the conductor element produced in this way is then also subjected to testing.
In order to guarantee that the terminals are electrically insulated, the caps also have to be hermetically sealed against atmospheric humidity, the lead to be insulated, and the spark plug has to have ceramic insulation at the one end, and the lead to the signal generator to be insulated at the other end; it is for this purpose that the metal terminals and the leads, in particular, are forced into the axial holes connecting the cap cavities to the out~ide; since the diameter of said holes is smaller than that of the terminals and leads, the caps are frequently cut and/or damaged and consequently the conductor element has to be discarded.
The above point/ along with the not inconsiderable amount of individual components rejected during testing, has considerable bearing upon the costs of the insulated conductor element.
SUMMARY OF THE INVENl'ION
The technical purpose of this invention is to propose a method that can be used for making insulated conductor elements performing the same functions as the afore-mentioned conductor elements, with improved manufacturing costs of the element and improved assembly times for mounting said elements onto internal combu~tion engines, by comparison with what is currently available on the market.
A further aim of this invention is to propose insulated conductor elements that can be used to connect generators of electric signals to corresponding electric units without any radio interference, in such a way that only the slightest amount of re~ects will be involved in their manufacture and assembly onto internal combustion engines, in such a way as to offer their corresponding terminals efficient protection against atmospheric humidity and lastly in such a way as to .
~ 18~
guarantee top performance in terms of the transmission of electricity from generator to spark plugs.
The method for making insula~ed conductor elements electrically connecting electric units to generators of electric signals, includes the following operationss moulding of a flexible insulating sheath, surrounding a corresponding first core, with said sheath complete with related caps, namely a first cap and a sècond cap;
extraction of said core from said sheath thus obtaining a through hole in the same sheath;
location in the first and second caps of a second and third core respectively;
injection into the through hole of said sheath of a mixture of liquid heated at such a temperature as will not alter the physical and chemical properties of said sheath;
solidifying of said mixture, so as to obtain a flexible electro-conductor component sorraunded by said sheath and consisting of a cylindrical shaped po~tion, said shaped portion adhering to the corresponding portion of said sheath and having ~8~
terminals in corrispondance of said caps, with said trerminals being shaped by said second and thrid cores; and extraction of said second and third cores from their corresponding caps.
The insulated conductor element accordingly produced, comprises the following parts:
a flexible electro-conductor componant, consisting of a cylindrical shaped portion whsse ends are designed as a single piece of the portion, forming terminals connected to the metal tips, either of the electric units or of the generator; and a flexible insulating sheath solid to and closely adhering to the cylindrical shaped portion, and surrounding the terminals by means of corresponding caps.
Said component is preferably to be made in conducting silicon rubber.
The element proposed consists solely of the afore-mentioned flexible electro-conductor component and the afore-mentioned insulating sheath; the structural simplicity of the proposed element is obvious, it allows considerable savings to be made on the manufacturing costs, and i~ extremely practical in terms of electric performance, durability, protection against corrosive atmospheric agents and lack of radio interference.
Top electric performance is achieved because the component making the electric connections is manufactured as a single piece and its flexibility enables push connection of the terminals in question to the afore-mentioned metal tips of either the electric units or the generator, thus achieving reduced resistance to contact from these connections, and consequently limiting voltage density in the large contact area between the terminals and metal tips.
The lack of assembled parts and of undue mechanical stress arising from said connections has a positive effect upon durability.
Protection against coxrosive atmospheric agents is guaranteed by the sheath, which is solid with and closely adhering to the cylindrical shaped portion of the component, and by the caps, closely adhering to thb portions of said metal tips that are immediately outside in relation to the terminals of the component that said metal tips are connected to.
The use of conducting silicon rubber enables a reduction in or near elimination of radio interference.
BRIEF DESCRIPTION OF THE DRAWINGS
Any features of this invention that are not apparent from the abovè will be more easily understood from the following detailed description with reference to the enclosed drawings and diagrams:
- Fig. 1 is a diagram showing a cross-section of the insulated conductor element proposed in this invention together with a spark plug.
- Figures ~ and 3 are diagrams showing enlarged cros6-sections of the two versions of the terminals of the above element.
DESCRITPION OF THE PREFERRFD EMBODIMENT
With detailed reference to these figures, No. 1 6 ~
g represents a flexible electro-conductor component, preferably made of conducting silicon rubber and having the same powers of conductivity as well-known electric conductors.
This component consists of a cylindrical-shaped portion 2, whose ends, with the latter, form a single piece, said terminals (obviously electro-conductors) being referred to as the first and second terminal respectively, and given reference numbers 3 and 4.
No. S refers to a flexible insulating sheath (made of a synthetic resin, such as silicon or synthetic rubber) which is solid to and adhering to said cylindrical shaped portion 2 and which also adheres to said terminals 3 and 4, by means of the corresponding caps 6 and 7, referred to respectively as the first and second cap.
Preferably terminals 3 and 4 are to be smaller in cross section than caps 6 and 7 are.
In the first version, the first cap 6 closely adheres to the corresponding first terminal 3 and the latter is centrally located on the seat 8 (see Fig.
1) .
This version can also be seen in Fig. 3, which ~8~6~
.
shows the second cap 7 corresponding to the second terminal 4.
In the second-version (shown in Fig. 2~ the cross-section of the second terminal 4 is smaller in diameter than ~he inside diameter of the second cap 7; thus constituting a circular seat 9.
The method for making element 100, in the way described, i.e. of making it from component 1 and sheath 5, involves a series of stages as follows.
First the moulding of the flexible insulating sheath 5 is carried out, by means of a first core (not shown in the diagram) that remains surrounded by the sheath.
The sheath this way obtained comprises the caps 6 and 7.
Then the first core is taken out from the sheath that this way features a through hole all along itself.
In a ~ollowing stage, a second an a third cores are respec~ively located into the first and second caps 6 and 7 of the sheath (neither of the second or third cores are shown in the drawing).
~ fter the location of the second and third cores, a misture of heated liquid is injected into the through hole of sheath 5.
The temperature.of the liquid mixture is such as will not alter the physical and chemical properties of the sheath.
Then the liquid mixture solidifies and keeps the form given by the sheath and the second and third cores, so as to produce aflexible electro-conductor component 1, that consists of a cylindrical-shaped portion 2, connected at its ends to two terminals 3 and 4.
Lastly the second and third cores are taken out from the caps 6 and 7.
Either the one or the other of the two versions described above for manufacturing cores can be used for terminals 3 and 4 and their corresponding caps 6 and 7.
- The surfaces of the sheath 5 and component meet according to design and are ~oined together in one piece, ~o that in the terms of this invention, the component and the sheath constitute a single piece; this means that the formation of pockets of air between said surfaces can be avoided quite regardless of the values of mechanical stress and temperature, provided that these do not exceed the pre-determined limits the element will be subjected to dllring use.
Seat 8, designed to locate the first terminal 3, will be connected to the metal tip 10 of a pre-determined electric unit 11 (such as a spark plug, see Fig. 1).
The flexibility of the material used for the manufacture of terminal 3 enables said interference-fit push connection to take place between terminal 3 and metal tip 10; it will therefore follow that said terminal will surround the metal tip 10 at the side, by exerting a pre-determined pressure on the latter;
this considerably limits resistance to contact, which, together with the large contact area between the terminal and the metal tip, will constLtute advantages that are obvious to an expert in this field.
Either seat 3, designed for the second terminal 4 in terms of the first version (Fig. 3)r or the circular seat 4, designed in terms of the second version (Fig. 2) are for interference-fit push connection, suited to the metal tips (which are not shown in the diagram) used in known generators of electric signals (such as coils, distributors and electronic ignition units~; the previously mentioned advantages will also apply in this case.
The final version of element 100 enables terminals 3 and 4 to be electrically connected to the corresponding metal tips of either an electric unit, on the one hand, or of a generator of electric signals, on the other hand; protection against humidity (more specifically against corrosive atmospheric agents) is offered by the caps 6 and 7, as each of the latter closely surrounds the portion of the electric tip (which is insulated if necessary like the spark plugs) immediately outside in relation to terminal 3 or 4 that said metal tip is connected to.
The final version of element lO0 has the same function a~ the conductor elements mentioned in the introduction, but unlike the latter, no assembly operations are required; furthermore the operations f~r mounting element 100 onto the engines of automobiles do not require any particular adjustments 2 0 ~
to be made and are facilitated by the push connection of terminals 3 and 4 to the metal tips.
The final method proposed makes an insulated conductor element that can be perfectly matched to the corresponding metal tip, and whlch optimizes electric performance, insulation and protection against atmospheric humidity; obviously the version of the cap and terminals will vary, according to the kind of electric tip being used: but this will not in any way impose limits upon`the range of protection of this invention either in terms of the above description or in terms of any of the claims to be made subsequently.
EL~CTRICALLY CONNECTING ELECTRICAL UNITS TO
ELECTRIC~L SIGNAL OE NERATOR, AND ELEMENT OBTAINED
THROUGH T%E SAID M~THOD.
BACRGROUND OF TH~ INVENTION
The invention xelates to a method for making insulated conductor elements for electrically connecting electrical units to electrical signal generator.
The invention also relates to the elements obtained by using the claimed method.
DESCRIPTION OF TH~ PRIOR ART
It is known that in the current ignition systems being u~ed in combustion enginesr electricity flows from the generator of electric signals (such as coil~, distributors, or electronic ignition units) to the spark plug through an electric lead with a conducting core consisting of a thin copper or metal alloy wire, that is wound into a coil (constitu~ing an inductance to limit what is known as radio interference) on a cylindrical shaped insulated support.
The conducting core is covered with a sheath and/or one or more layers of insulating material. The ends of the core are fixed to metal tsrminals which, by means ef suitable metal tabs, are shaped in such a way as to make it possible for them to be fixed (connected) at the one end to the outer metal tang (metal tip) of the spark plug, and to be fixed at the other end to the corresponding metal tip to be found in the afore-mentioned generator of electric signals.
It is also known that metal terminals are normally electrically insulated by means of the sheath and caps, which are both made in natural or synthetic rubbers, or in plastic materials.
Therefore, each conductor element for transmitting electricity from the generator to the spark plug contains a metal core endpiece wound around its corresponding cylindrical shaped in~ulated support, which, in turn, is electrically insulated ~0~4~
(the lead), two metal terminals (one for each end of the core) and two insulated caps (one for each terminal of the conductor element). The final version of this invention consists of a plural number of separately produced components (lead, terminals, tabs, caps) that have been duly tested prior to assembly; the conductor element produced in this way is then also subjected to testing.
In order to guarantee that the terminals are electrically insulated, the caps also have to be hermetically sealed against atmospheric humidity, the lead to be insulated, and the spark plug has to have ceramic insulation at the one end, and the lead to the signal generator to be insulated at the other end; it is for this purpose that the metal terminals and the leads, in particular, are forced into the axial holes connecting the cap cavities to the out~ide; since the diameter of said holes is smaller than that of the terminals and leads, the caps are frequently cut and/or damaged and consequently the conductor element has to be discarded.
The above point/ along with the not inconsiderable amount of individual components rejected during testing, has considerable bearing upon the costs of the insulated conductor element.
SUMMARY OF THE INVENl'ION
The technical purpose of this invention is to propose a method that can be used for making insulated conductor elements performing the same functions as the afore-mentioned conductor elements, with improved manufacturing costs of the element and improved assembly times for mounting said elements onto internal combu~tion engines, by comparison with what is currently available on the market.
A further aim of this invention is to propose insulated conductor elements that can be used to connect generators of electric signals to corresponding electric units without any radio interference, in such a way that only the slightest amount of re~ects will be involved in their manufacture and assembly onto internal combustion engines, in such a way as to offer their corresponding terminals efficient protection against atmospheric humidity and lastly in such a way as to .
~ 18~
guarantee top performance in terms of the transmission of electricity from generator to spark plugs.
The method for making insula~ed conductor elements electrically connecting electric units to generators of electric signals, includes the following operationss moulding of a flexible insulating sheath, surrounding a corresponding first core, with said sheath complete with related caps, namely a first cap and a sècond cap;
extraction of said core from said sheath thus obtaining a through hole in the same sheath;
location in the first and second caps of a second and third core respectively;
injection into the through hole of said sheath of a mixture of liquid heated at such a temperature as will not alter the physical and chemical properties of said sheath;
solidifying of said mixture, so as to obtain a flexible electro-conductor component sorraunded by said sheath and consisting of a cylindrical shaped po~tion, said shaped portion adhering to the corresponding portion of said sheath and having ~8~
terminals in corrispondance of said caps, with said trerminals being shaped by said second and thrid cores; and extraction of said second and third cores from their corresponding caps.
The insulated conductor element accordingly produced, comprises the following parts:
a flexible electro-conductor componant, consisting of a cylindrical shaped portion whsse ends are designed as a single piece of the portion, forming terminals connected to the metal tips, either of the electric units or of the generator; and a flexible insulating sheath solid to and closely adhering to the cylindrical shaped portion, and surrounding the terminals by means of corresponding caps.
Said component is preferably to be made in conducting silicon rubber.
The element proposed consists solely of the afore-mentioned flexible electro-conductor component and the afore-mentioned insulating sheath; the structural simplicity of the proposed element is obvious, it allows considerable savings to be made on the manufacturing costs, and i~ extremely practical in terms of electric performance, durability, protection against corrosive atmospheric agents and lack of radio interference.
Top electric performance is achieved because the component making the electric connections is manufactured as a single piece and its flexibility enables push connection of the terminals in question to the afore-mentioned metal tips of either the electric units or the generator, thus achieving reduced resistance to contact from these connections, and consequently limiting voltage density in the large contact area between the terminals and metal tips.
The lack of assembled parts and of undue mechanical stress arising from said connections has a positive effect upon durability.
Protection against coxrosive atmospheric agents is guaranteed by the sheath, which is solid with and closely adhering to the cylindrical shaped portion of the component, and by the caps, closely adhering to thb portions of said metal tips that are immediately outside in relation to the terminals of the component that said metal tips are connected to.
The use of conducting silicon rubber enables a reduction in or near elimination of radio interference.
BRIEF DESCRIPTION OF THE DRAWINGS
Any features of this invention that are not apparent from the abovè will be more easily understood from the following detailed description with reference to the enclosed drawings and diagrams:
- Fig. 1 is a diagram showing a cross-section of the insulated conductor element proposed in this invention together with a spark plug.
- Figures ~ and 3 are diagrams showing enlarged cros6-sections of the two versions of the terminals of the above element.
DESCRITPION OF THE PREFERRFD EMBODIMENT
With detailed reference to these figures, No. 1 6 ~
g represents a flexible electro-conductor component, preferably made of conducting silicon rubber and having the same powers of conductivity as well-known electric conductors.
This component consists of a cylindrical-shaped portion 2, whose ends, with the latter, form a single piece, said terminals (obviously electro-conductors) being referred to as the first and second terminal respectively, and given reference numbers 3 and 4.
No. S refers to a flexible insulating sheath (made of a synthetic resin, such as silicon or synthetic rubber) which is solid to and adhering to said cylindrical shaped portion 2 and which also adheres to said terminals 3 and 4, by means of the corresponding caps 6 and 7, referred to respectively as the first and second cap.
Preferably terminals 3 and 4 are to be smaller in cross section than caps 6 and 7 are.
In the first version, the first cap 6 closely adheres to the corresponding first terminal 3 and the latter is centrally located on the seat 8 (see Fig.
1) .
This version can also be seen in Fig. 3, which ~8~6~
.
shows the second cap 7 corresponding to the second terminal 4.
In the second-version (shown in Fig. 2~ the cross-section of the second terminal 4 is smaller in diameter than ~he inside diameter of the second cap 7; thus constituting a circular seat 9.
The method for making element 100, in the way described, i.e. of making it from component 1 and sheath 5, involves a series of stages as follows.
First the moulding of the flexible insulating sheath 5 is carried out, by means of a first core (not shown in the diagram) that remains surrounded by the sheath.
The sheath this way obtained comprises the caps 6 and 7.
Then the first core is taken out from the sheath that this way features a through hole all along itself.
In a ~ollowing stage, a second an a third cores are respec~ively located into the first and second caps 6 and 7 of the sheath (neither of the second or third cores are shown in the drawing).
~ fter the location of the second and third cores, a misture of heated liquid is injected into the through hole of sheath 5.
The temperature.of the liquid mixture is such as will not alter the physical and chemical properties of the sheath.
Then the liquid mixture solidifies and keeps the form given by the sheath and the second and third cores, so as to produce aflexible electro-conductor component 1, that consists of a cylindrical-shaped portion 2, connected at its ends to two terminals 3 and 4.
Lastly the second and third cores are taken out from the caps 6 and 7.
Either the one or the other of the two versions described above for manufacturing cores can be used for terminals 3 and 4 and their corresponding caps 6 and 7.
- The surfaces of the sheath 5 and component meet according to design and are ~oined together in one piece, ~o that in the terms of this invention, the component and the sheath constitute a single piece; this means that the formation of pockets of air between said surfaces can be avoided quite regardless of the values of mechanical stress and temperature, provided that these do not exceed the pre-determined limits the element will be subjected to dllring use.
Seat 8, designed to locate the first terminal 3, will be connected to the metal tip 10 of a pre-determined electric unit 11 (such as a spark plug, see Fig. 1).
The flexibility of the material used for the manufacture of terminal 3 enables said interference-fit push connection to take place between terminal 3 and metal tip 10; it will therefore follow that said terminal will surround the metal tip 10 at the side, by exerting a pre-determined pressure on the latter;
this considerably limits resistance to contact, which, together with the large contact area between the terminal and the metal tip, will constLtute advantages that are obvious to an expert in this field.
Either seat 3, designed for the second terminal 4 in terms of the first version (Fig. 3)r or the circular seat 4, designed in terms of the second version (Fig. 2) are for interference-fit push connection, suited to the metal tips (which are not shown in the diagram) used in known generators of electric signals (such as coils, distributors and electronic ignition units~; the previously mentioned advantages will also apply in this case.
The final version of element 100 enables terminals 3 and 4 to be electrically connected to the corresponding metal tips of either an electric unit, on the one hand, or of a generator of electric signals, on the other hand; protection against humidity (more specifically against corrosive atmospheric agents) is offered by the caps 6 and 7, as each of the latter closely surrounds the portion of the electric tip (which is insulated if necessary like the spark plugs) immediately outside in relation to terminal 3 or 4 that said metal tip is connected to.
The final version of element lO0 has the same function a~ the conductor elements mentioned in the introduction, but unlike the latter, no assembly operations are required; furthermore the operations f~r mounting element 100 onto the engines of automobiles do not require any particular adjustments 2 0 ~
to be made and are facilitated by the push connection of terminals 3 and 4 to the metal tips.
The final method proposed makes an insulated conductor element that can be perfectly matched to the corresponding metal tip, and whlch optimizes electric performance, insulation and protection against atmospheric humidity; obviously the version of the cap and terminals will vary, according to the kind of electric tip being used: but this will not in any way impose limits upon`the range of protection of this invention either in terms of the above description or in terms of any of the claims to be made subsequently.
Claims (10)
1) A method for making insulated conductor elements electrically connecting electric units to generators of electric signals, consisting of the following stages: moulding of a flexible insulating sheath, surrounding a corresponding first core, with said sheath complete with related caps, namely a first cap and a second cap;
extraction of said core from said sheath thus obtaining a through hole in the same sheath;
location in the first and second caps of a second and third core respectively;
injection into the through hole of said sheath of a mixture of liquid heated at such a temperature as will not alter the physical and chemical properties of said sheath;
solidifying of said mixture, so as to obtain a flexible electro-conductor component sorraunded by said sheath and consisting of a cylindrical shaped portion, said shaped portion adhering to the corresponding portion of said sheath and having terminals in corrispondance of said caps, with said trerminals being shaped by said second and thrid cores; and extraction of said second and third cores from their corresponding caps.
extraction of said core from said sheath thus obtaining a through hole in the same sheath;
location in the first and second caps of a second and third core respectively;
injection into the through hole of said sheath of a mixture of liquid heated at such a temperature as will not alter the physical and chemical properties of said sheath;
solidifying of said mixture, so as to obtain a flexible electro-conductor component sorraunded by said sheath and consisting of a cylindrical shaped portion, said shaped portion adhering to the corresponding portion of said sheath and having terminals in corrispondance of said caps, with said trerminals being shaped by said second and thrid cores; and extraction of said second and third cores from their corresponding caps.
2) A method according to claim 1, wherein said terminals are extended axially for the length of the corresponding caps.
3) A method according to claim 1, wherein the rims of at least one of said terminals is solid with and closely adhering to a corresponding cap and is centrally located on a seat designed for connection to either a metal tip of a corresponding electric unit, or to a metal tip of a generator of electric signals.
4) A method according to claim 1, wherein at least one of said terminals is smaller in cross section than the inside diameter of the corresponding cap, thus constituting a circular seat designed for connection to either a metal tip of a corresponding electric unit, or to the metal tip of a generator of electric signals.
5) A method according to any of the previous claims, wherein said flexible electro-conductor is made of conducting silicon rubber.
6) An insulated conductor element electrically connecting electric units to a generator of electric signals, comprising:
a flexible electro-conductor component, consisting of a cylindrical shaped portion whose ends are designed as a single piece of said portion, forming terminals connected to a metal tips, either of said electric units or of said generator; a flexible insulating sheath solid to and closely adhering to said cylindrical shaped portion, and surrounding said terminals by means of corresponding caps.
a flexible electro-conductor component, consisting of a cylindrical shaped portion whose ends are designed as a single piece of said portion, forming terminals connected to a metal tips, either of said electric units or of said generator; a flexible insulating sheath solid to and closely adhering to said cylindrical shaped portion, and surrounding said terminals by means of corresponding caps.
7) An element according to claim 6, wherein said terminals are extended axially for a length not exceeding the length of the corresponding caps.
8) An element according to claim 6, wherein a rim of at least one of said terminals is solid with and adheres to the corresponding cap and is centrally located on a seat designed for connection to a metal tip of either an electric unit or a metal tip of said generator.
9) An element according to claim 6, wherein at least one of said terminals is smaller in cross section than the inside diameter of the corresponding cap, to constitute a circular seat designed for connection to either a metal tip of an electric unit, or a metal tip of said generator.
10) An element according to any of the above claims 6 to 9, wherein said flexible electro-conductor component is made of conducting silicon rubber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT8903512A IT1233310B (en) | 1989-06-09 | 1989-06-09 | METHOD FOR THE CREATION OF INSULATED CONDUCTIVE UNITS ELECTRICALLY CONNECTING ELECTRIC LOADS WITH ELECTRIC SIGNAL GENERATORS AND UNITS OBTAINED BY SUCH METHOD |
| IT3512A/90 | 1989-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2018468A1 true CA2018468A1 (en) | 1990-12-09 |
Family
ID=11108773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002018468A Abandoned CA2018468A1 (en) | 1989-06-09 | 1990-06-07 | Method for making insulated conductor elements for electrically connecting electrical units to electrical signal generator, and element obtained through the said method |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0406509A1 (en) |
| JP (1) | JPH0395887A (en) |
| KR (1) | KR920002768B1 (en) |
| BR (1) | BR9002714A (en) |
| CA (1) | CA2018468A1 (en) |
| IT (1) | IT1233310B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1277282B1 (en) * | 1995-12-14 | 1997-11-05 | Meroni Bruno | MEANS FOR ELECTRICALLY CONNECTING THE COIL AND SPARK PLUG OF A VEHICLE WITH PETROL AND MIXTURE ENGINE |
| DE19612508C2 (en) * | 1996-03-29 | 2000-05-04 | Bremi Auto Elektrik Ernst Brem | Connector |
| EP1146600A1 (en) | 2000-04-13 | 2001-10-17 | Nexans | Flexible medium voltage interconnection and method to obtain same |
| EP1146601B1 (en) * | 2000-04-13 | 2006-08-16 | Nexans | Flexible medium voltage interconnection and method to obtain same |
| JP2001313504A (en) * | 2000-04-14 | 2001-11-09 | Internatl Business Mach Corp <Ibm> | Connector for signal transmission line signal, transmission line, and board |
| DE102004024540A1 (en) | 2004-05-18 | 2005-12-15 | Robert Bosch Gmbh | Connecting element for connecting a spark plug and an ignition coil |
| US8817950B2 (en) * | 2011-12-22 | 2014-08-26 | Moxtek, Inc. | X-ray tube to power supply connector |
| SE541409C2 (en) | 2017-06-19 | 2019-09-24 | Sem Ab | Spark plug extension |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3435401A (en) * | 1966-10-05 | 1969-03-25 | Texas Instruments Inc | Insulated electrical conductors |
| GB1292893A (en) * | 1970-10-13 | 1972-10-18 | Ford Motor Co | Ignition leads |
-
1989
- 1989-06-09 IT IT8903512A patent/IT1233310B/en active
- 1989-09-18 EP EP89830396A patent/EP0406509A1/en not_active Withdrawn
-
1990
- 1990-06-07 CA CA002018468A patent/CA2018468A1/en not_active Abandoned
- 1990-06-08 BR BR909002714A patent/BR9002714A/en not_active Application Discontinuation
- 1990-06-08 KR KR1019900008437A patent/KR920002768B1/en not_active Application Discontinuation
- 1990-06-08 JP JP2148834A patent/JPH0395887A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BR9002714A (en) | 1991-08-20 |
| KR910002058A (en) | 1991-01-31 |
| JPH0395887A (en) | 1991-04-22 |
| IT1233310B (en) | 1992-03-26 |
| KR920002768B1 (en) | 1992-04-03 |
| EP0406509A1 (en) | 1991-01-09 |
| IT8903512A0 (en) | 1989-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |