US3787800A - Resistor ignition lead - Google Patents
Resistor ignition lead Download PDFInfo
- Publication number
- US3787800A US3787800A US00595305A US3787800DA US3787800A US 3787800 A US3787800 A US 3787800A US 00595305 A US00595305 A US 00595305A US 3787800D A US3787800D A US 3787800DA US 3787800 A US3787800 A US 3787800A
- Authority
- US
- United States
- Prior art keywords
- core
- impregnated
- sheath
- cable
- end portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/183—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0063—Ignition cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
- H01C1/148—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors the terminals embracing or surrounding the resistive element
Definitions
- ABSTRACT is directed to a non-metallic resistor ignition cable having a core including a conductive coating over strands of non-conductive material.
- the strands are impregnated with a conductive medium prior to or at the time of application of the conductive coating.
- Outer insulation is supplied which is stripped off to expose the coated strands.
- a terminal is applied to the stripped end of the cable by crimping a ferrule portion around the end of the outer insulation and the folded back coated strands.
- This invention relates to ignition cables, more particularly to an ignition cable which incorporates a nonmetallic conductor having uniformly distributed resistance per unit length of the cable which is provided with a special means for making electrical contact between the non-metallic conductor and metallic tenninals which are positioned on each end of the ignition cable.
- the present invention contemplates providing an ignition cable which has improved physical and electrical characteristics which will obviate the problems pointed out hereinbefore.
- the ignition cable incorporating the invention has the inherent durability to satisfy these service requirements under the warranty during normal use of the automotive vehicle, and also has sufficient durability to remain efficient even though it has been subjected to careless handling on the part of a repairman.
- the invention further contemplates the provision of a new method of making connection between a nonmetallic resistive conductor of an ignition cable to the metallic terminal at the ends thereof by providing a reliable means of making electrical contact to the metallic terminal which has physical and electrical characteristics to remain effective during the warranty period of the automotive vehicle.
- FIG. 1 is a perspective view with cut-away portions showing an ignition cable having a resistive nonmetallic conductor.
- FIG. 2 is an elevational view of a portion of the ignition cable cut to length.
- FIG. 3 is an elevational view of the cable portion shown in FIG. 2 with the insulation cut-away at its terminal ends to prepare the non-metallic conductor for connecting to terminals.
- FIG. 4 is an elevational view similar to FIG. 3 showing the non-metallic conductor bent back over the insu lation at both ends.
- FIG. 5 is an elevational view of the ignition cable shown in FIG. 4 with the terminals attached to its ends.
- FIG. 6 is a sectional elevation of theterminalshown at the left end of FIG. 5.
- FIG. 7 is a perspective view of a modification of the cable shown in FIG. 1. 7
- FIG. 8 is a perspective view of another modification.
- the non-metallic conductor 10 provided for the ignition cable shown in FIG. 1 consists of individual threadlike filaments l2 impregnated with conductive material such as graphite.
- the individual filaments of the conductor 10 may be made of cotton, rayon, linen, dacron (polyester), or glass, or mixtures of the various filaments as desired.
- the individual threads are preferably unreeled from storage spools and are immersed continuously as unreeled in a colloidal solution of graphite in alcohol so as to completely impregnate the individual fibers of the threads.
- the threads Upon issuing from the graphite solution, the threads are gathered together in a suitable mechanical means and carried into a suitable drying oven as a group so that they are dried together in contact with each other which deposits the graphite as discrete particles on the threads.
- the resistance of the final conductor is in part determined by the number of threads which are joined together in the gathering device so that, if a lower resistance is desired in the final cable as used in an ignition circuit, a larger number of the graphite impregnated thread-like filaments are joined together.
- the subsequent conductor components in combination with the plurality of conductive threads determine total resistance of conductor.
- all of the threads as a group are passed through a suitable applicator which applies and impregnates all of the threads with a conducting rubber dissolved in a solvent so as to completely impregnate the whole group of threads.
- the impregnated coated strands are then conducted from the applicator through a second drying and curing oven which removes the solvents and also vulcanizes or cures the conducting rubber 14 by a thermal action.
- the amount of conducting rubber must be considered when it is desired to obtain a predetermined resistive value in the final ignition cable.
- the vulcanizable elastomeric material such as conducting rubber may be formulated with various concentrations of conducting material to produce the predetermined resistive value desired in the final ignition cable.
- the rubber coated non-metallic conductor is then passed through a braiding device which applies to the exterior of the conductor an open overbraid 16 somewhat similar to a net which holds the individual threads or filaments together to prevent aunitary conductor.
- the overbraid may be of any desired material such as cotton, rayon, linen, dacron (polyester), and glass, and is supplied to the conductor for the purpose of increasing its strength or resistance to elongation which must also be considered in the selection of the material of which the braid is made.
- the braid may also be made in a manner to completely enclose the rubber coated conductor element if such is deemed necessary.
- the conductor After leaving the braider which applies the overbraid 16 to the conductor, the conductor is passed into a suitable applicator which applies a second coating of conducting rubber 18.
- the conducting rubber is dissolved in a solvent and impregnates and coats both the braid and the underlying conductor. It is then passed through a curing oven to remove the solvent and, to cure and vulcanize the conducting rubber. This completes the fabrication of the non-metallic conductor as an element of the ignition cable.
- the non-metallic conductor as fabricated by the steps described hereinbefore is then provided with a coating 20 consisting of colloidal solution of graphite in alcohol after which it is passed through an oven for the purpose of removing the solvent from the coating.
- a coating 20 consisting of colloidal solution of graphite in alcohol after which it is passed through an oven for the purpose of removing the solvent from the coating.
- the non-metallic conductor coated with the layer of graphite releasing agent 20 is then passed through a tuber which applies an extrusion or coating 24 of insulating material to the exterior thereof which preferably consists of butadiene styrene rubber (SBR type), although any of the normal insulating materials having suitable characteristics may be used.
- SBR type butadiene styrene rubber
- the coated nonmetallic conductor is then placed in a vulcanizer or passed through a continuous vulcanizer which utilizes steam at a suitable pressure and temperature for curing or vulcanizing the insulating coating which has been applied.
- the method and means for applying this coating is well known in the art, and will not be described in further detail.
- a second overbraid 26 is applied to the exterior of the insulating coating 24.
- this braid is made from threads or filaments of glass fiber in order to obtain maximum strength, although other materials may be used, such as cotton, rayon, linen, or dacron.
- the net or overbraid 26 is applied preferably as an open layer so that portions of the underlying insulating coating 24 are exposed and capable of being contacted by a second outer insulating jacket or coating 28, preferably of neoprene material which is also applied by passing the conductor with the various jackets and overbraid through a tuber and vulcanizing the last applied jacket in the same manner as described hereinbefore with the first insulating coating 24.
- the neoprene material is preferably used as an outer coating due to its inherent characteristics, such as oil resistance and the like. However, other commonly used jacketing materials such as chlorosulfanated polyethylene, butyl, BunaN and others are suitable. With these steps, the fabrication of the ignition cable is completed, the whole operation being preferably carried out as a continuous one in a mass production line.
- the outer two jackets 22 with the inbedded glass overbraid may be readily removed from the nonmetallic conductor, due to the releasing layer 20 of graphite which has been applied to the exterior of the conductor as described hereinbefore.
- the length of the non-metallic conductor which is bared by removing the insulation 22 depends upon the type of terminal which is to be applied to the ends of the ignition cable.
- the bared terminal portions A and B of the nonmetallic conductor are then bent back over the insulating portion 22 of 'the ignition cable, as shown in FIG. 4 and while being held in this position, the terminals 30 and 32 are applied to the ignitioncable by placing the clinching portion of the terminals 30a and 32a in embracing relation with the bent-over portions A and B of the nonmetallic conductor and the exterior of the insulation of the cable.
- the terminals are positioned in a manner that a small portion 22a of the cable insulation extends beyond the edge of the terminals.
- the clinching sections of the terminals are then crimped tightly in position to embrace both the bent-over portions A and B of the non-metallic conductor and the exterior of the cable.
- the crimping may be brought about in various ways but, preferably, the crimping pressure is concentrated on spaced, non-aligning areas 34 and 36 from the opposite sides of the cable as is best seen in FIG. 6.
- This causes the terminal to place a heavy compression on all of the elements of the cable including the bentover portions A and B of the non-metallic conductor and also the overbraids l6 and 26 which are positioned on the non-metallic conductor itself and between the insulating jackets 24 and 28.
- This enhances the strength of the cable and its resistance to elongation when abnormal stresses are applied to the cable, inasmuch as all of the elements of the cable are anchored solidly together by the clinched terminals by placing the compression upon the cable adjacent its end.
- the cable then has the combined strength of the central non-metallic conductor with its overbraid, and that of the imbedded overbraid 26 which is positioned between the two insulating coatings.
- FIG. 7 a modification of the cable is shown in which the fiber strands a are fabricated from fiberglass, cotton, rayon, linen or polyester or mixtures thereof, and impregnated with conductive material such as graphite. They are then positioned in parallel relation and covered with an open overbraid 16a of cotton, rayon, linen, polyester or glass or mixtures of these various filaments as desired.
- the overbraid 16a is then coated with conducting rubber in a solvent solution to form a conducting layer 180 which is applied in a manner similar to the step described with reference to the coating 18 of FIG. 1.
- the conducting coating 18a flows through the overbraid 16a and superficially coats the fiberglass strands 10a of the central core member which is dried and vulcanized as described hereinbefore.
- the conducting releasing agent in the form of coating 20 is applied as before, and thereafter, the insulating coating 24, the imbedded overbraid 26, and the outer neoprene coating 28 are applied as before described with reference to the modification shown in FIG. 1.
- This method of fabricating resistance cable is particularly suited for a cable in which the core member is fabricated from fiberglass strands.
- the central core member 10 is the same as the cable described and shown in FIG. 1, the only difference being that the imbedded reinforcing overbraid 26, which is positioned between the insulating layers 24 and 28, has been omitted.
- the attachment of the terminal pieces 30 and 32 to the ends of the cables shown in FIGS. 7 and 8 is identical to that described with reference to the modification shown in FIG. 1.
- the insulation is cut away to expose the central conductor as shown in FIG. 2, the insulation being removed at the conducting releasing layer 20 in the manner described hereinbefore. Thereafter, the exposed terminating portions A and B are bent back over the outer insulation and the metallic terminal pieces 30 and 32 are applied by crimping as has already been described.
- an ignition cable having an outer sheath of electrical insulation material and an inner core of nonmetallic fibrous strands coated with an electrically conductive carbonaceous material; said core having an end portion thereof extending beyond one end of said sheath and folded over said one end of said sheath; said end portion of said core being impregnated with a conductive medium comprising a dispersion of carbon particles in a resinous base for binding the strands of said end portion of said core together, and an electrical terminal having a ferrule portion of sheet metal extending around and tightly crimped onto said end of said sheath and the impregnated end portion of said core with said ferrule portion in electrically conductive engagement with said impregnated core.
- an ignition cable having an outer sheath of electrical insulation material and an inner core of nonmetallic fibrous strands coated with an electrically conductive carbonaceous material; said core having an end portion thereof extending beyond one end of said sheath and folded over said one end of said sheath;
- said end portion of said core being impregnated with a conductive medium comprising a dispersion of carbon particles in an elastomeric material for binding the strands of said end portion of said core together, and
- an electrical terminal having a ferrule portion of sheet metal extending around and tightly crimped onto said end of said sheath and the impregnated end portion of said core with said ferrule portion in electrically conductive engagement with said impregnated core.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Insulated Conductors (AREA)
Abstract
Description
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US315464A US3284751A (en) | 1963-10-11 | 1963-10-11 | Resistor ignition lead |
US59530566A | 1966-11-07 | 1966-11-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3787800A true US3787800A (en) | 1974-01-22 |
Family
ID=26979912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00595305A Expired - Lifetime US3787800A (en) | 1963-10-11 | 1966-11-07 | Resistor ignition lead |
Country Status (1)
Country | Link |
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US (1) | US3787800A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2323893A1 (en) * | 1975-09-12 | 1977-04-08 | Rippe Rene | Spark ignition internal combustion engine ignition system - has two ignition coils in parallel for constant power supply to plugs |
DE3809322A1 (en) * | 1988-03-19 | 1989-09-28 | Stocko Metallwarenfab Henkels | ADERENDULE |
US5046240A (en) * | 1989-08-07 | 1991-09-10 | Sumitomo Wiring System, Ltd. | Method of terminating wire wound type noise preventing resistance cable |
EP0534176A2 (en) * | 1991-09-26 | 1993-03-31 | Sumitomo Wiring Systems, Ltd. | Connection construction of high-voltage resistance wire |
US5564946A (en) * | 1993-04-19 | 1996-10-15 | Yazaki Corporation | Waterproof connector |
US6054028A (en) * | 1996-06-07 | 2000-04-25 | Raychem Corporation | Ignition cables |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1946713A (en) * | 1932-01-22 | 1934-02-13 | Charles A Rowley | Cable terminal |
US2446387A (en) * | 1943-05-19 | 1948-08-03 | Thomas F Peterson | Shielded cable |
US2451800A (en) * | 1946-11-15 | 1948-10-19 | Buchanan Electrical Prod Corp | Terminal clip for electrical conductors |
US2714623A (en) * | 1950-03-09 | 1955-08-02 | Gen Motors Corp | Non-metallic conductor |
-
1966
- 1966-11-07 US US00595305A patent/US3787800A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1946713A (en) * | 1932-01-22 | 1934-02-13 | Charles A Rowley | Cable terminal |
US2446387A (en) * | 1943-05-19 | 1948-08-03 | Thomas F Peterson | Shielded cable |
US2451800A (en) * | 1946-11-15 | 1948-10-19 | Buchanan Electrical Prod Corp | Terminal clip for electrical conductors |
US2714623A (en) * | 1950-03-09 | 1955-08-02 | Gen Motors Corp | Non-metallic conductor |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2323893A1 (en) * | 1975-09-12 | 1977-04-08 | Rippe Rene | Spark ignition internal combustion engine ignition system - has two ignition coils in parallel for constant power supply to plugs |
DE3809322A1 (en) * | 1988-03-19 | 1989-09-28 | Stocko Metallwarenfab Henkels | ADERENDULE |
US5046240A (en) * | 1989-08-07 | 1991-09-10 | Sumitomo Wiring System, Ltd. | Method of terminating wire wound type noise preventing resistance cable |
EP0534176A2 (en) * | 1991-09-26 | 1993-03-31 | Sumitomo Wiring Systems, Ltd. | Connection construction of high-voltage resistance wire |
EP0534176A3 (en) * | 1991-09-26 | 1993-07-28 | Sumitomo Wiring Systems, Ltd. | Connection construction of high-voltage resistance wire |
US5564946A (en) * | 1993-04-19 | 1996-10-15 | Yazaki Corporation | Waterproof connector |
US6054028A (en) * | 1996-06-07 | 2000-04-25 | Raychem Corporation | Ignition cables |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ELTRA CORPORATION, OHIO Free format text: CERTIFIED COPY OF MERGER FILED IN THE OFFICE OF SECRETARY OF STATE OF DELAWARE ON JUNE 6, 1980, SHOWING MERGER AND CHANGE OF NAME OF ASSIGNOR;ASSIGNOR:ATREL CORPORATION;REEL/FRAME:003992/0237 Effective date: 19811020 Owner name: ELTRA CORPORATION, A CORP. OF NY Free format text: CERTIFIED COPY OF MERGER FILED IN THE OFFICE OF SECRETARY OF STATE OF DELAWARE ON JUNE 6, 1980, SHOWING MERGER AND CHANGE OF NAME OF ASSIGNOR;ASSIGNOR:ATREL CORPORATION (INTO);REEL/FRAME:003992/0237 Effective date: 19811020 |
|
AS | Assignment |
Owner name: ALLIED CORPORATION, NEW JERSEY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ELTRA CORPORATION;REEL/FRAME:004026/0293 Effective date: 19820531 Owner name: ALLIED CORPORATION; COLUMBIA RD. AND PARK AVE., MO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ELTRA CORPORATION;REEL/FRAME:004026/0293 Effective date: 19820531 |
|
AS | Assignment |
Owner name: EIGHT NEWCO, INC., A CORP. OF DE. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIED CORPORATION, A CORP. OF NEW YORK;REEL/FRAME:004878/0039 Effective date: 19860521 Owner name: PRESTOLITE WIRE Free format text: CHANGE OF NAME;ASSIGNOR:EIGHT NEWCO, INC.;REEL/FRAME:004878/0049 Effective date: 19871123 |
|
AS | Assignment |
Owner name: WELLS FARGO BANK NATIONAL ASSOCIATION Free format text: SECURITY INTEREST;ASSIGNORS:HENLEY MANUFACTURING HOLDING COMPANY, INC.;GENERAL CHEMICAL CORPORATION;PRESTOLITE WIRE CORPORATION;AND OTHERS;REEL/FRAME:005133/0534 Effective date: 19890703 |