EP0093300B1 - Zünddrahtanschluss - Google Patents

Zünddrahtanschluss Download PDF

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Publication number
EP0093300B1
EP0093300B1 EP19830103718 EP83103718A EP0093300B1 EP 0093300 B1 EP0093300 B1 EP 0093300B1 EP 19830103718 EP19830103718 EP 19830103718 EP 83103718 A EP83103718 A EP 83103718A EP 0093300 B1 EP0093300 B1 EP 0093300B1
Authority
EP
European Patent Office
Prior art keywords
ignition wire
tongue
wire terminal
portions
ignition
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
Application number
EP19830103718
Other languages
English (en)
French (fr)
Other versions
EP0093300A2 (de
EP0093300A3 (en
Inventor
Charles William Powers
Emile Percy Plouffe
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.)
General Cable Industries Inc
Original Assignee
Prestolite Wire LLC
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 Prestolite Wire LLC filed Critical Prestolite Wire LLC
Publication of EP0093300A2 publication Critical patent/EP0093300A2/de
Publication of EP0093300A3 publication Critical patent/EP0093300A3/en
Application granted granted Critical
Publication of EP0093300B1 publication Critical patent/EP0093300B1/de
Expired legal-status Critical Current

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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
    • 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
    • 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
    • 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

Definitions

  • This invention relates to a terminal for an ignition cable such as used with automotive internal combustion engines and pulse combustion furnaces.
  • this application relates to an ignition wire terminal which is usable to connect an ignition cable to a spark plug terminal, or to a distributor cap socket.
  • Such devices are typically in the form of an expandable split tubular portion adapted to be placed over a male connector, such as that of a spark plug, or to be compressed and forced into a conventional cup-shaped tubular socket of an automotive distributor, with a crimpable portion to be crimped around an end of a conventional reistive-core ignition cable, a section of exposed central core being folded back over the jacket to form a conventional "strip and fold back" connection, and with an intermediate web portion interconnecting the tubular portion and the crimpable portion.
  • the split tubular portions have been provided with various spring means for retaining them to a spark plug terminal or the like, such as a C-shaped spring steel member slipped over the tubular portion and having projections which extended inwardly through openings in the tubular portion to bear against a spark plug terminal or the like, or with inwardly-displaced wall sections.
  • the intermediate portions have been provided with cutouts, to allow for applications where bent terminals are desired, together with reinforcing means which extend into the crimped area, or which interlock, to aid in maintaining the desired bend.
  • the crimpable sections have been made with various arrangements or ridges, protruding tangs, and other similar features,.to enhance the retention of the outer jacket of the ignition cable, to reduce the possibility that the cable will be pulled from its termination in an attempt to disconnect the ignition terminal by pulling on the ignition cable.
  • One reason for these types of damage is the unpredictable and uncontrollable retaining forces provided by an expandable split tubular section.
  • ignition wire terminals have been made in two pieces, the crimpable portion and the connecting portion being separate pieces of different material, so that the expandable tubular connection portion may be made of a stronger, stiffer material than the crimpable portion, in an attempt to repeatably control the retaining force provided by the expandable tubular portion.
  • US-A-1.970.767 describes an ignition wire terminal, comprising:
  • the first cylindrical barrel portion comprises integral spring means for retaining the ignition wire terminal to an ignition wire connection terminal.
  • These means are formed by a bendable tongue (10), which is preferably formed by cutting or punching out a portion of the cylinder wall.
  • the tongue may be formed to extend towards the open end of the connector.
  • the tongue has a tip portion with a radial projection (inwardly pressed portion 11) adapted to cooperate with said ignition wire connection terminal (2) by seating in groove (4)-see the Figures 1 and 2 and page 1, lines 33-104.
  • US-A-3.243.763 shows an ignition wire terminal having a deformed intermediate portion--see Figure 9.
  • the instant invention overcomes the above mentioned and other deficiencies of the prior art.
  • the instant invention according to Claim 1 provides a unitary ignition wire terminal, having a connecting tubular barrel portion which contains an integral spring means providing an easily controllable and maintainable retaining force, without necessitating expansion of the entire tubular connection barrel, a crimpable portion which is crimped to provide a significantly higher retaining force between an ignition cable and the connector, and an integral intermediate connecting portion connecting the tubular barrel connector with the crimpable portion, which is provided with deformed portions which do not detrimentally affect the stiffness of a straight ignition terminal, yet allow it to be bent into a strong and stable bent connection terminal.
  • the tubular barrel connection portion includes one or more tongue portions formed by cutting a generally U-shaped slot into the side of the cylindrical barrel portion, and providing a tip formed by the bight of the U-shape with a formed projection.
  • This tongue portion acts as an integral spring, and lies generally in the plane of the cylindrical barrel portion, the projection engaging a spark plug terminal, if it is an inward projection, or engaging a distributor socket, if it is an outward projection.
  • Such slots and projections are easy and efficient to form during the conventional stamping of blanks from flat metal which are subsequently bent into connection, crimpable and intermediate sections.
  • the intermediate section includes three adjacent inwardly-deformed portions which do not seriously degrade the stiffness of the intermediate portion of a straight ignition wire terminal, and, when bent in the reverse direction, provide a strong and stable bent intermediate section of a bent ignition wire terminal.
  • the crimpable portion is crimped over only a portion of its length, the crimped portion being a generally cylindrical portion compressing the ignition cable, the uncrimped portion forming a diverging funnel portion, so that, in order for ignition cable to be pulled away from the terminal, an uncompressed portion of the ignition cable must first be compressed in the diverging funnel portion before it can be pulled through the tightly crimped section. This has been found to provide a higher retaining force between the ignition cable and the ignition wire terminal.
  • the electrical connection between the ignition cable and the ignition wire terminal may be further improved in the manner shown in US-A-4,284,322, dated August 18, 1981, and entitled, "Ignition Cable Terminal Construction", by placing a sheet of conductive material between the outer jacket portion and the folded-back central core portion.
  • an ignition wire terminal according to the independent claim has a unitary body with novel features in each of its three sections and is usable either to make connection with either male or female ignition wire connection terminals.
  • an ignition wire terminal having a linearly extending cylindrical barrel portion, a. linearly extended hemicylindrical or half-tubular intermediate channel portion integral with the cylindrical barrel portion, and a linearly extending crimpable portion integral with the intermediate portion, the cylindrical barrel portion defining an integral spring means for retaining the ignition wire terminal to an ignition wire connection terminal, the integral spring means being a tongue portion formed in the cylindrical barrel portion by a generally U-shaped slot and disposed substantially in the plane of the cylindrical barrel portion, and including a tip portion defining a radial projection adapted to cooperate with an ignition wire connection terminal. It is an advantage of the invention that the force provided by such an integral spring is easily controlled and maintained, since it is not necessary to attempt to control or maintain the force provided by an entire expandable barrel portion.
  • Ignition wire terminal 30 includes a first linearly extending cylindrical or tubular barrel portion 36 having an open end surface 38 and an end portion 40 which is connected to and integral with a linearly extending hemicylindrical intermediate channel portion 42 having first and second edge portions 44 and 46 and a hemicylindrical body portion 48, which is also integral with a third linearly extending crimpable portion 50.
  • ignition cable 32 has a conductive central core portion 52, a concentric insulating layer 54 surrounding the central core portion, and a jacket portion 56 surrounding insulating layer 54.
  • insulating layer 54 and jacket portion 56 are stripped or removed from an end portion of core portion 52, leaving an exposed portion 58 which is folded back and placed in contact with jacket layer 56, being disposed between jacket layer 56 and ignition wire terminal 30.
  • the third crimpable portion shown in greater detail in Figs. 5-12 and 13-15, before crimping, is a U-shaped portion having a base portion integral with the hemicylindrical channel portion 42 and first and second crimpable side portions.
  • channel portion 42 is described as hemicylindrical, and preferably is in the form of a lengthwise half of the cylindrical tube, but may be any desired portion of a cylindrical tube, or any other suitable conventional shape, particularly if a bent ignition wire terminal is not desired.
  • crimpable portion 50 has been crimped in a novel manner. As best shown in Fig. 1, crimpable portion 50 has a total length 60 but, as will be apparent, is crimped only over a length 62 which is approximately one-half of the total length 60. This produces a tubular crimped portion 64, and a corresponding section of compressed ignition cable 66, and an uncrimped portion forming a diverging funnel shaped portion 68, from which an end 69 of ignition cable 32 protrudes. As stated above, this novel crimping procedure produces a mechanical connection which has been found to be superior to that of a conventional crimp, in which the crimpable portion is tightly crimped throughout its entire length.
  • this crimping procedure increases pull-out strength by forcing the layers of cable 32 to remain concentrically joined together, and be compressed through funnel section 68 before ignition cable 32 can be pulled out of ignition wire terminal 30. It is believed that in a conventional crimp, the bond between the layers of cable 32 fails when severe tension is applied, allowing the core 52 and insulation 54 to withdraw from the crimped area, leaving the jacket portion unsupported.
  • an ignition terminal according to the invention is provided with deformed portions, so that it can be made into a bent ignition terminal, if desired.
  • first and second deformed portions 70 and 72 are formed in edge portions 44 and 46, adjacent each other, and mutually in the direction of the other.
  • a third deformed portion 74 is intermediate the first and second deformed portions 70, 72 in body portion 48, and in the direction of edges 44, 46.
  • deformed portions were formed in a prototype dimensional sample, made of brass, of an embodiment of the invention, with the intent of providing a terminal bent so that deformed portion 70 and 72 would continue to be deformed further in the same direction upon bending the ignition wire terminal, and third deformed portion 74 would stretch to become a smoothly rounded portion at the apex of an obtuse angle defined by the ignition wire terminal. This result was successfully attained on the brass sample.
  • Ignition wire terminal 30, in Figs. 1 and 2 is shown connected to a spark plug, including an insulating portion 80 and a terminal portion 82.
  • terminal portion 82 is of an industry-standard shape, which is used both for male spark plug terminals for automotive and furnace use, and also for male distributor terminals on internal combustion engines provided with distributors having such caps.
  • terminal portion 82 has an end surface 84, a connected diverging frustoconical portion 86, a cylindrical portion 88, a converging frustoconical portion 90 and a neck portion 92. Variations are allowed in a base portion 94, but the overall height from surface 84 to a shoulder 96 is carefully controlled. When any embodiment of the invention is used in conjunction with a spark plug-type terminal, open end surface 38 of terminal 30 tightly abuts shoulder 96.
  • barrel portion 36 is a locked or solid barrel, although, as will be apparent, barrel portion 36 could also be formed in the shape of a conventional expandable barrel portion, except that the expansion of such a barrel need not be controlled, due to the integral spring means according to the invention.
  • barrel portion 36 is made a locked barrel portion by a dovetail projection 100 and a dovetail slot 102 formed in or on first and second edges forming seam 104. If desired, the locking action of dovetail slot and projection 102, 100 may be increased by staking, to expand the dimensions of dovetail projection 100 and shrink the opening of the dovetail slot 102, in conventional manner.
  • integral spring means is an axial tongue portion 110 lying parallel to a lengthwise axis 112 of barrel portion 36, defined by a generally U-shaped slot having a bight 114 and outwardly diverging leg or side portions 116, 118, so that tongue portion 110 has a substantially wider base portion 120 than tip portion 122.
  • Tip portion 122 is provided with a projection 124, here shown as an inward radial circular projection, projection 124 cooperating with converging frustoconical section 90 of terminal 82 to establish electrical contact with terminal 82 and hold terminal 82 firmly against shoulder 96.
  • projection 124 need not be a circular projection to hold ignition wire terminal 30 firmly against shoulder 96 of spark plug terminal portion 82, that projection 124 need not be an inwardly directed projection to form a functional ignition wire terminal according to the invention, and that a tongue portion according to the invention need not be axial.
  • the embodiment illustrated in Figs. 1-4, and also in Figs. 9, 10, 15 and 16, provides the highest and most controllable pulloff force of all illustrated embodiments, since tongue portion 110, although lying substantially in the plane of barrel portion 36, is stiffened by lateral circular curvature, and the width of base portion 120 provides a stiff resilient hinge area for tongue portion 110.
  • crimpable portion 50 is shown in uncrimped form, as a generally U-shaped portion having a base portion 132 integral with intermediate portion 42 and first and second side portions 134, 136 having edges 138, 140.
  • Base portion 132 and side portions 134, 136 may be formed with ridges 142 or the like, for more securely holding an ignition cable 32, and could also be provided with a plurality of inwardly-extending pointed tangs to penetrate the jacket portion of an ignition cable 32.
  • the retention provided with a crimping procedure according to the invention is believed to be more than adequate for any practical applications of an ignition wire terminal according to the invention.
  • integral spring means constitute first and second tongue portions 150 and 152, tongues 150 and 152 being oriented in a circumferential direction shown by arrow 154.
  • Tongue portion 150 lies substantially in the plane of barrel portion 36a, and is defined by a generally U-shaped slot having a bight portion 156 and diverging leg or side portions 158, 160, defining tongue portion 150 with a tip portion 164 significantly wider than base portion 162.
  • Tip portion 162 is provided with a radial projection 166.
  • Second tongue portion 152 is defined by a generally U-shaped slot having a bight portion 170 and two diverging side or leg portions 172, 174, defining tongue portion 152 with a tip portion 176 and a base portion 178 significantly wider than the width of tip portion 176, and provided with a radial projection 180.
  • radial projections 166 and 180 are directed inwardly, towards each other, for use on a male terminal, and directed outwardly, away from each other, for use with a conventional female terminal.
  • projections 166, 180 would cooperate with frustoconical portion 90 to hold end 38 against shoulder 96.
  • FIGs. 7 and 8 there are shown perspective views of a third preferred embodiment of the invention 190, which is also similar in several ways to the first preferred embodiment of the invention, but differs in the structure of the integral spring means.
  • the integral spring means of the second preferred embodiment of the invention is circumferential tongue portion 192, extending around barrel portion 36b in a circumferential direction as shown by arrow 194 for slightly less than one-half of the total circumference of barrel portion 36b.
  • Tongue portion 192 is defined by a generally U-shaped slot in barrel portion 36b having a bight portion 196 and leg or side portions 198 and 200, defining tongue portion 192 as having a tip portion 202 and a base portion 204 of substantially the same width as tip portion 202.
  • Tip portion 202 is provided with a radial projection 206, and, diametrically opposite projection 206, barrel portion 36b is provided with a radial projection 208.
  • radial projections 206 and 208 are integrally formed by distorting the material of a spark plug terminal, forming a depression on one surface, causing a projection on the opposite surface of the material. Also, as with other embodiments of the invention, projections 206 and 208 would be directed inwardly, towards each other, to use third preferred embodiment 190 with a male terminal such as a spark plug terminal, and would be directed outwardly, away from each other, to use terminal 190 together with a conventional female distributor cap socket.
  • an ignition wire terminal 30 in accordance with the embodiment of the invention as shown in Fig. 1 is shown as formed into a bent ignition terminal.
  • crimpable portion 50 is shown in its uncrimped state, not connected to an ignition cable, such as cable 32.
  • an ignition cable such as cable 32.
  • terminal 30 is bent in a first direction, so that base portion 132 of crimpable portion 50 forms an acute angle 220 with barrel portion 32, and barrel portion 36 forms an obtuse angle 222 with crimpable portion 50, indicated for clarity as an angle between a line 224 which is parallel to edges 138 and 140, and also parallel to the axis of base portion 132, and a line 226 which is parallel to the longitudinal axis of barrel portion 36.
  • third deformed portion 74 is relatively unchanged, although it may enlarge somewhat during bending, at the apex of acute angle 220, and first and second deformed portions 70 and 72 have been straightened to form smooth undistorted bend areas 230 and 232, respectively, at the apex of an obtuse angle such as angle 222 formed by the bent ignition wire terminal.
  • line 224, and angle 222 are unchanged when side portions 134 and 136 are crimped around an ignition cable, such as cable 32.
  • Figs. 11 and 12 there is shown a third preferred embodiment of the invention, which is similar in some respects to the first preferred embodiment of the invention shown in Figs. 5 and 6, differing in the configuration of the integral spring means according to the invention.
  • barrel portion 36c of fourth preferred embodiment 240 of an ignition wire terminal includes a first tongue portion 242 and a second tongue portion 244, tongue portions 242 and 244 lying substantially in the plane of barrel portion 36c, tongue portions 242 and 244 being circumferential tongue portions formed in a circumferential direction as indicated by arrow 246.
  • First tongue portion 242 is defined by a generally U-shaped slot in barrel portion 36c having a bight portion 248 and leg or side portions 250 and 252. As illustrated, leg or side portions 250 and 252 are substantially parallel, and define a tongue portion 242 having a tip portion 254 and a base portion 256 which is approximately the same width as tip portion 254.
  • Tip portion 254 is provided with a radial projection 258, projection 258 being a lengthwise radial projection extended in the direction of the axis of barrel portion 36c, identical to axis 112 shown in Fig. 3.
  • second tongue portion 244 is defined by a generally U-shaped slot in barrel portion 36c, having a bight portion 260 and side or leg portions 262 and 264, defining a tongue portion 244 having a tip portion 266 and a base portion 268 which is approximately the same width as that of tip portion 266.
  • Tip portion 266 is also provided with a linearly-extending radial projection 270, which is extended in the direction of the axis of the barrel member of an ignition terminal according to the invention, such as axis 112 shown in Fig. 3.
  • radial projections 258 and 270 are inward radial projections if the subject ignition wire terminal is to be used to cooperate with and make connection to a spark plug-type terminal such as terminal portion 82, shown in Fig. 1, and are directed outwardly, away from each other, if the ignition wire terminal is to be used to cooperate with a conventional cup-shaped female distributor terminal, not shown.
  • Figs. 13 and 14 a symbolic drawing of the procedure used to form a crimped portion with improved cable-retaining characteristics is illustrated.
  • Cable 32 itself has a profile and positioning designated by solid lines 280 and 282, before the crimping operation, and a position and profile designated by phantom lines 284 and 286 following the crimping operation.
  • a stripped exposed end 58 of core portion 52 is foled back in contact with jacket portion 56, and this end of cable 32 is placed in crimpable portion 50 of an ignition wire terminal according to the invention, so that it protrudes slightly beyond side portions 134, 136, into channel portion 42, although this protrusion is not necessary to practice the invention or to provide the benefits of the invention.
  • the folded back end 58 is placed in contact with base portion 132 of crimpable portion 50, so that it will not be damaged when side portions 134, 136 are crimped around cable 32.
  • Base portion 132 is placed upon a supporting die 290 which has a surface 292 which is adapted to generally conform to the outer surface of base portion 132.
  • a crimping die 294 is provided, preferably having a length 296 approximately identical to the length of tubular crimped portion 64, shown as length 62 in Fig. 1, approximately one-half the length 298 of die 290, which is approximately identical to the total length 60 of crimpable portion 50, as best shown in Fig. 1.
  • die 294 may be suitably configured and offset from die 290 to produce the equivalent results.
  • Die 294 is mounted to be reciprocated in a direction shown with arrow 300.
  • Die 294 is a conventional overlap crimping die, having converging entry surfaces 302 and 304.
  • converging surfaces 302 and 304 will begin to bend portions 134 and 136 towards each other.
  • portions 134 and 136 reach points 306 and 308, respectively, they will begin to be bent inwardly with different radii.
  • Arcuate surface 310 preferably has the same radius of curvature as arcuate surface 312, with the locating point of radius 310 higher than radius 312 with respect to surface 313.
  • Arcuate section 312 is provided with a groove 314 and a projection 316, in conventional manner.
  • edge 138 will follow surface 310, and edge 140 will follow surface 312, pass over groove 314, and be deflected towards cable 32 by projection 316, thus folding edge 140 under edge 138, so that portion 134 overlaps portion 136.
  • This forms a retaining portion having a generally tubular crimped portion crimped around and compressing cable 32, and an uncrimped portion forming a diverging funnel shaped portion, and leaving an uncompressed end portion 69 extending beyond the funnel shape portion onto channel portion 42.
  • this construction provides a significant improvement in the level of force required to pull cable 32 out of crimpable portion 50 of an ignition wire terminal according to the invention.
  • FIGs. 15 and 16 there is shown the embodiment of the invention, shown in Figs. 1-4, having a radial circular projection 318 which is identical in all respects to projection 124, except that it is formed in an outward direction, to cooperate with a conventional tubular cup-shaped female distributor terminal (not shown), rather than inwardly directed to cooperate with a converging frustoconical portion 90 of a conventional spark plug-type terminal.
  • This configuration is a minor modification of that shown in Figs. 1-4, and provides a novel ignition wire terminal that can easily be produced for either male terminal or female terminal applications easily and inexpensively, and also provides an ignition wire terminal to connect an ignition cable to a conventional distributor, and which lacks parts which interfere with the installation of conventional insulating boots after assembly of the ignition cable assembly, causing damage which may lead to early failure or the insulating boot.
  • Figs. 17 and 18 illustrate a fourth preferred embodiment 320 of an ignition wire terminal according to the invention, with many similar features, having similar numbering to those features found in other embodiments of the invention.
  • a crimpable portion 50a includes a first side portion 322 and a second side portion 324, and a bottom or base portion 326.
  • side portion 322 is longer than side portion 324, for forming a nonoverlapping crimp.
  • Portions 322, 324 and 326 include ridge-forming grooves 328 and 330.
  • Barrel portion 36d also includes integral spring means including a first tongue portion 332 and a second tongue portion 334, circumferentially disposed in the direction indicated by arrow 336.
  • First tongue portion 332 is defined by a generally U-shaped slot in barrel portion 36d having a bight portion 338 and side or leg portions 340 and 342, defining a tongue portion 332 having a tip portion 344 and a base portion 346.
  • Tip portion 344 is provided with a radial projection, extending linearly in a direction parallel to axis 112 shown in Fig. 3.
  • Second tongue portion 334 is defined by a generally U-shaped slot including a bight portion 352, and side or leg portions 354 and 356, defining a second tongue portion 334 having a tip portion 358 and a base portion 360.
  • Tip portion 358 is provided with a radial projection 362, similar to radial projection 348, linearly extending in the direction of axis 112, shown in Fig. 3.
  • barrel portion 36d includes a linearly-extending radial projection shown as a ridge or groove 364, circumferentially extending from adjacent radial projection 348 to adjacent radial projection 362, and defining a first gap 366 between projection 364 and projection 348, and a second gap 368 between projection 364 and projection 362.
  • projection 364 may be either an inward projection or an outward projection, and serves as a circumferential stiffening portion for increasing the spring constant of tongue portions 332 and 334.
  • Figs. 19 and 20 illustrate the preferred method for crimping crimpable portion 50a about an ignition cable such as ignition cable 32.
  • an ignition cable such as ignition cable 32.
  • the position of the ignition cable is shown by solid line 370 and 372.
  • the outline of the ignition cable is shown by phantom lines 374 and 376.
  • an ignition cable isplaced between side portions 322 and 324 so that a free end portion 378 extends a substantial distance beyond crimpable portion 50a towards barrel portion 36d.
  • Crimpable portion 50a is placed on supporting die 380, with bottom or base portion 328 in contact with surface 382 of supporting die 380.
  • a crimping die reciprocal in the direction of arrow 386, is provided with a converging entry surface 388 and a converging entry surface 390, and an arcuate surface 392 interconnecting entry surfaces 388 and 390.
  • surfaces 388,390 and 392 will guide tip portion 394 of first side portion 322, and tip portion 396 of second side portion 324 into mutual contact, to form a nonoverlapping crimp.
  • the crimping method shown in Figs. 19 and 20 produces a funnel effect, similar to that formed by the method shown in Figs. 13 and 14, since free end portion 378 is somewhat compressed when force is applied to ignition cable such as ignition cable 32, providing at least some of the benefits of a funnel-shaped crimp portion in retaining the layers of an ignition cable in assembled relationship.
  • Figs. 21-31 illustrate various other modifications of the invention, showing the structure of integral spring portions which may be formed in a barrel portion such as barrel portion 36, and which may be useful in some applications for an ignition wire terminal according to the invention.
  • Figs. 21-31 illustrate the integral spring portion of a barrel portion in developed form.
  • ignition terminals according to the invention are formed in a conventional multiple- strike stamping process, and are initially flat stamped shapes, interconnected by connecting rails, which are subsequently appropriately curved to form a barrel portion, an intermediate portion and a crimpable portion.
  • the embodiment of Figs. 21-31 are somewhat similar to corresponding portions of the second preferred embodiment of the invention shown in Figs.
  • Figs. 21-23 differ from each other in the provision of means for adjusting the spring tension provided to tongue portions 420, 430 to radial projections 438, 440 respectively.
  • a circumferential slot 442 is provided to remove material from the base portions of tongue portions 420, 430, to reduce the resilience of the respective tongue portions.
  • a pair of small holes 444 are positioned so that each hole removes material from the base portion of a tongue portion, reducing its resilience, and, in Fig. 23, a single large hole 446 accomplishes the same purpose for both tongue portions 420 and 430 simultaneously.
  • Fig. 25 is a further variation on the embodiment of Fig. 21, where each tongue portion defined by a diverging U-shaped slot is also provided with a diverging U-shaped slot, to provide a relatively small spring force.
  • First tongue 420 is provided with a first tension controlling slot in the form of a generally U-shaped slot having a bight portion 450 and diverging leg portions 452 and 454 approximately parallel respectively to leg portions 424 and 426. This eliminates the material lying between legs 452 and 454 from the resilient hinge portion of tongue 420, effectively reducing its resilience.
  • Tongue portion 430 is similarly provided with a corresponding generally U-shaped slot having a bight portion 460 and diverging leg portions 462 and 464, to the same end.
  • Figs. 24, 25, 26 and 27 may be considered as variations of the first preferred embodiment shown in Figs. 5 and 6, with varying configurations of the generally U-shaped slots which define respective tongue portions, with or without additional hole means to control or reduce the resilience of the respective tongue portions.
  • a first tongue portion 470 is defined by a U-shaped slot having a bight portion 472 and parallel leg or side portions 474 and 476.
  • a second tongue portion 478 is defined by a U-shaped slot having a bight portion 480 and parallel leg or side portions 482 and 484.
  • first and second tongue portions 500, 502 are formed by mirror-image slots each having a bight portion 504 and side or leg portions having both diverging portions 506, 508 and parallel portions 510 and 512.
  • first and second tongue portions 514, 516 are defined by a mirror-image generally U-shaped groove, each having a bight portion 518, a first or side portion 520 running in a circumferential direction and a second leg or side portion 522 diverging from its corresponding side or leg 520.
  • Fig. 27 is similar to the embodiment of Fig. 24, but includes a spring- tension adjusting slot.
  • a single circumferentially extending slot 524 extends into tongue portions 470 and 478 to reduce the amount of material at the base of tongue portions 470, 478, to reduce and control their respective resilience and spring rate.
  • the width of this slot as the width of all other slots, and the diameter of a hole or holes provided for this function may be increased or decreased as appropriate to control the resilience and spring tension of a tongue portion.
  • Fig. 29 is a variation of the embodiment shown in Fig. 1, utilizing two smaller axial tongue portions rather than one larger axial tongue portion.
  • First and second tongue portions 526 and 528 are defined by axially-oriented generally U-shaped grooves having respective bight portions 530, 532 and side or leg portions 534, 536 and 538, 540, where side or leg portions 534, 536 and 538, 540 are diverging side or leg portions extending generally in a dimension parallel to a lengthwise axis such as axis 112 shown in Fig. 3.
  • Figs. 30 and 31 are further variations of the second preferred embodiment of the invention shown in Figs. 5 and 6, and of other nonpreferred embodiments shown in the preceding figures.
  • first and second tongue portions 542 and 544 are defined by a single slot in the general form of two mirror-image U-shaped circumferentially extending slots with parallel legs, one parallel leg of each being continued until it connects with the facing leg or side of the other.
  • the slot has respective bight portions 546 and 548, respective unconnected side or leg portions 550 and 552 and a single leg or side portions 554 which interconnects bights 546 and 548.
  • the embodiment of Fig. 31 is a modification of the embodiment shown in Fig.

Claims (9)

1. Ein Zünddrahtanschluß mit:
einem sich linear erstreckenden zylindrischen Trommelabschnitt (36), der einen ersten offenen Endbereich (38) und einen zweiten Endbereich (40) aufweist;
einen linear sich erstreckenden U-förmigen Zwischenabschnitt (42), der einstückig mit dem zweiten Endbereich (40) ist, wobei der Zwischenabschnitt (42) einen ersten (44) und einen zweiten (46) Randabschnitt und einen Hauptteil (48) aufweist, der einen ersten mit dem zylindrischen Trommelabschnitt (36) einstückigen Endbereich und einen zweiten Endbereich aufweist, der einstückig mit einem sich linear erstrekkenden umfalzbaren Teil (50) ist;
wobei der umfalzbare Teil (50) ein U-förmiger Abschnitt mit einem Basisteil (132) ist, das einstükkig mit dem Hauptteil (48) und einem ersten (134) und einem zweiten (136) Seitenteil ist, das einstükkig mit dem Hauptteil ist und über ein Zündkabel (32) gefalzt werden kann, das ein zurückgefaltetes Kernstück (58) aufweist;
wobei derTrommelabschnitt (36) eine Federeinrichtung (110,150,152,192,242,244,332,334,420, 430,470,478,500,502,514,516,526,528,532,534) zum Halten des Zünddrahtanschlusses an einem Zündkabelverbindungsanschluß (83) aufweist;
wobei die einstückige Federeinrichtung ein erstes Zungenteil ist, das von einem im wesentlichen U-förmigen Schlitz gebildet wird, der im Trommelabschnitt angeordnet ist, wobei das Zungenteil im wesentlichen bündig zum Trommelabschnitt (36) angeordnet ist;
wobei das erste Zungenteil einen radialen Vorsprung (124,166,180,206,258,270,318,362,438, 440) auf der Spitze aufweist, der mit dem Zündkabelverbindungsanschluß (82) zum Halten des Zündkabelanschlusses (30, 130, 190, 240, 320) zusammenwirkt;
wobei der U-förmige Zwischenabschnitt (42) in seinem ungebogenen Zustand erste (70), zweite (72) und dritte (74) verformte Teile aufweist, die es dem Zwischenabschnitt (42) ermöglichen, in eine erste Richtung gebogen zu werden;
wobei der erste verformte Teil (70) in dem ersten Randabschnitt (44) in einer Richtung in Richtung auf den zweiten Randabschnitt (46) ausgebildet ist, wobei das zweite verformte Teil (72) im zweiten Randabschnitt (46) gegenüber dem ersten verformten Teil (70) in einer Richtung in Richtung auf das erste verformte Teil (70) ausgebildet ist und wobei das dritte verformte Teil (74) im Hauptteil (48) zwischen dem ersten verformten Teil (70) und dem zweiten verformten Teil (72) und in einer Richtung in Richtung auf den ersten (44) und den zweiten (46) Randabschnitt ausgebildet ist; und
wobei die erste Richtung eine Biegerichtung ist, wobei das Basisteil (132) des umfalzbaren Teils (50) einen stumpfen Winkel (220) mit dem Trommelabschnitt (36) einschließt.
2. Ein Zünddrahtanschluß nach Anspruch 1,
wobei der Trommelabschnitt (36) ein geschlossener Trommelabschnitt ist, wobei der Trommelabschnitt (36) eine Fuge (104) aufweist, die von ersten und zweiten Rändern des Trommelabschnittes gebildet wird, wobei die ersten und zweiten Ränder zusammenpassende Schwalbenschwanzteile (100, 102) sind.
3. Ein Zünddrahtanschluß nach Anspruch 1,
wobei das erste Zungenteil sich in der Richtung parallel zur Achse des Trommelabschnittes (36) erstreckt;
wobei der im wesentlichen U-förmige Schlitz einen Buchtabschnitt (114), der eine Spitze des ersten Zungenteils (122) bildet; und divergierende Seitenteile (116,118) aufweist, die eine Zungenbasis (120) bilden, die wesentlich breiter ist als die Spitze (122).
4. Ein Zünddrahtanschluß nach Anspruch 1,
wobei die einstückige Federeinrichtung ein zweites Zungenteil (244, 430, 478, 502, 516, 528, 534) aufweist;
wobei erste (242, 420, 470, 500, 514, 526, 532) und zweite (244, 430, 478, 502, 516, 528, 534) Zungenteile jeweils umfangseitig angeordnet sind;
wobei die ersten und zweiten Zungenteile (242, 244) eine Spitze mit einem radialen Vorsprung (258, 270, 320, 438, 440) haben, der mit dem Zünddrahtverbindungsanschluß (82) zum Halten des Zünddrahtanschlusses (130, 190, 240, 320) zusammenwirkt.
5. Ein Zünddrahtanschluß nach Anspruch 4,
wobei derTrommelabschnitt (36) einen radialen Vorsprung (364) aufweist, der sich umfangseitig von der Nachbarschaft des radialen Vorsprunges (348) des ersten Zungenteiles (332) zur Nachbarschaft des radialen Vorsprunges (362) des zweiten Zungenteile (334) erstreckt.
6. Ein Zünddrahtanschluß nach Anspruch 4,
wobei jedes der ersten und zweiten Zungenteile (242, 244, 420, 430, 470, 478, 500, 502, 514, 516, 526, 528, 532, 534) von einem im wesentlichen U-förmigen Schlitz gebildet ist, der in Trommelabschnitt vorgesehen ist, wobei jeder der im wesentlichen U-förmigen Schlitze einen Buchtabschnitt (248, 260, 348, 352, 422, 432, 472, 480, 504, 518, 530, 532, 546, 548) und divergierende Seitenteile (250, 252, 262, 264, 340, 342, 354, 356, 424, 426, 434,436,474,476,482,484,506,508,520,522,534, 536, 538, 556, 558, 560) aufweist.
7. Ein Zünddrahtanschluß nach Anspruch 4 oder 6,
wobei jeder der im wesentlichen U-förmigen Schlitze im Trommeläbschnitt (36) einen Buchtteil (546, 548), ein erstes Seitenteil (554) und ein zweites Seitenteil (550, 552) aufweist, wobei das erste Seitenteil (554) eines ersten der im wesentlichen U-förmigen Schlitze einstückig mit einem ersten Seitenteil (554) eines zweiten der U-förmigen Schlitze ausgebildet ist.
8. Ein Zünddrahtanschluß nach Anspruch 1,
wobei das Zungenteil ein umfangsseitiges Zungenteil (204) ist, das von einem umfangseitig ausgerichteten im wesentlichen U-förmigen Schlitz (196, 198, 200) gebildet wird, der im Trommelabschnitt angeordnet ist und einen ersten radialen Vorsprung (206) an der Spitze aufweist;
wobei der zylindrische Trommelabschnitt (36) ferner einen zweiten radialen Vorsprung (208) aufweist, der diametral gegenüber dem ersten radialen Vorsprung (206) angeordnet ist; und
wobei der erste radiale Vorsprung (206) und der zweite radiale Vorsprung (208) dazu vorgesehen sind, mit dem Zünddrahtverbindungsanschluß (82) zum Halten des Zünddrahtanschlusses zusammenzuwirken.
9. Ein Zünddrahtanschluß nach Anspruch 1,
wobei der Zünddrahtanschluß in der ersten Richtung gebogen ist; und
wobei der dritte verformte Teil (74) am Scheitel eines stumpfen Winkels (220) angeordnet ist, der von dem gebogenen Zünddrahtanschluß gebildet wird;
wobei die ersten und zweiten verformten Teile (70, 72) gestreckt sind, um glatte nicht verdrillte gebogene Flächen am Scheitel eines stumpfen Winkels (22) zu bilden, die von dem gebogenen Zünddrahtanschluß gebildet sind.
EP19830103718 1982-04-30 1983-04-18 Zünddrahtanschluss Expired EP0093300B1 (de)

Applications Claiming Priority (2)

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US37337682A 1982-04-30 1982-04-30
US373376 1989-06-29

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EP0093300A2 EP0093300A2 (de) 1983-11-09
EP0093300A3 EP0093300A3 (en) 1987-01-14
EP0093300B1 true EP0093300B1 (de) 1989-09-27

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JP (1) JPS58198885A (de)
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE4138071C1 (en) * 1991-11-19 1993-05-19 Bremi Auto-Elektrik Bremicker Gmbh + Co, 5883 Kierspe, De Box-like connection contact for sparking plug lead - has spring element in form of tubular section or sleeve slit along length to provide spring tags

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Publication number Priority date Publication date Assignee Title
FR2627021B1 (fr) * 1988-02-08 1990-08-03 Electricfil Cosse de connexion electrique

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DE4138071C1 (en) * 1991-11-19 1993-05-19 Bremi Auto-Elektrik Bremicker Gmbh + Co, 5883 Kierspe, De Box-like connection contact for sparking plug lead - has spring element in form of tubular section or sleeve slit along length to provide spring tags

Also Published As

Publication number Publication date
EP0093300A2 (de) 1983-11-09
DE3380657D1 (en) 1989-11-02
JPS58198885A (ja) 1983-11-18
EP0093300A3 (en) 1987-01-14
MX153551A (es) 1986-11-12
JPH0139637B2 (de) 1989-08-22

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