US3778535A - Coaxial connector - Google Patents
Coaxial connector Download PDFInfo
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- US3778535A US3778535A US00252791A US3778535DA US3778535A US 3778535 A US3778535 A US 3778535A US 00252791 A US00252791 A US 00252791A US 3778535D A US3778535D A US 3778535DA US 3778535 A US3778535 A US 3778535A
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- ferrule
- cable
- connector
- receive
- coupling nut
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
- H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/04—Fixed joints
- H01P1/045—Coaxial joints
Definitions
- the first is that-the outer cable conductor is unsupported by the relatively weak cable dielectric at the clamping point so thatit-begins to collapse under load, i.e.,. itreduces radiallyso-that the electrical and mechanical connectionto theconnector body deteriorates.
- the present invention provides a device for terminating or connecting semi-rigid coaxial cable of the type having a center conductor surrounded by a dielectric medium and an outer conductor having a given inner diameter held to agiven close tolerance for efficient signal transfer, which comprises a threaded insert assembly which includes a coupling nut having external threads on one end and two longitudinal concentric bores therein, one of the bores being larger than the second, a outer ferrule having a sleeve portion and radially extending rim portion, the sleeve portion .adapted to slide into the coupling nut, and a retaining ring having teeth on the inner edges, the ring adapted to fit onto the cable, and.an adapter assembly which includes a connector body having .intemal threads adapted to receive the external threads on the coupling nut, .and also having three, longitudinal, concentric bores of differingdiameters, and'a inner ferrule having a beveled end, the ferruleadapted to'
- FIG. 1 illustrates a-CATV directional tap to .which semi-rigid coaxial cable is connected utilizing the present invention
- FIG. 1A shows details of the coaxial cable of FIG. 1;
- FIG.2 is a perspective, exploded and partially sectioned view of one half of the connector construction in accordance with the present invention.
- FIG. 3 is a perspective exploded and partially sectioned view of another half of the connector constructed in accordance with the present invention.
- FIGS. 4 and 5 illustrate the assembly of the connector shown in FIGS. 2 and 3 to a coaxial cable.
- a CATV directional tap designated at 10 in FIG. 1, .is used, either on over-head lines or underground, to provide television signals, entering therein from distribution coaxial cable 12 attached thereto via coaxial vconnector14, to the homes located along the TV cable.
- Tap 10 is a conventional directional coupler and splitter such as manufactured by Jerrold Electronics, Inc. In the modelshown in FIG. 1, tap 10 contains a circuitry -(not,shown).which sends the TV signals into .four different homes via house tapslS (of which only two are seen).
- Cable 12 is one type of semi-rigid coaxial cable whose structure can be seen in FIG. 1A.
- the cable includes an outer conductor 16 and a center conductor .18.
- the dielectric material separating the two conductors is airv filled chamber, designated at 20, thereinbe- .tween.
- Disks 22 of dielectric material such as polyethylene arepositioned at spaced intervals along the inside of cable 12, to support and centralize center conductor
- one of the critical dimensions in coaxial cable such as cable 12 is the diameter of the inner surface of outer conductor16 shown as D in FIG. 1A.
- coaxial connector 14 which eliminates damaging deformation to cable 12 and which provides a means for attaching cable 12 to tap 10 without the use of special tools.
- Coaxial connector 14 is shown in detail in FIGS. 2 and 3 to which reference is now made.
- FIG. 2 shows threaded insert assembly 24 of coaxial connector 14.
- the assembly includes a housing or coupling nut 26, outer ferrule 28 and cable retaining ring 30.
- FIG. 2 also shows guage 32 which is provided to insure proper installation of connector 14 onto cable 12 aswill-be described in detail below.
- Coupling nut 26 contains external threads 34 on end 35, and a hexagonal surface 36 on end 37. Internally, coupling nut 26 defines two concentric bores of differing diameters. The smallest diameter bore 38, beginning attend 37, meets the largest diameter bore 40 which begins at end 35. The diameter of smallest bore 38 is slightly greater than the outer diameter of outer ferrule 28.
- Outer ferrule 28 consists of a sleeve 44 and a rim 46.
- .Sleeve.44 is thin walled and is slightly longer than coupling nut 26. Rim 46extends outwardly for a distance slightly less than the root diameter of external threads '34 on coupling nut 26. Internally, outer ferrule 28 defines .a bore .48, andwithin rim 46 a internal, annular recess having .a step 51. The diameter of bore 48 is slightly greater than the outer diameter of coaxial cable 12 and the diameter of recess 50 within step 51 is sized to receive therein cable retaining ring 30.
- Cable retaining ring 30 is characterized by having serrations or spring fingers 52 on its inner edge 54.
- the inner diameter of ring 30 with the inner spring fingers 52 in a nondeformed position is slightly less than the outer diameter of coaxial cable 12.
- the outer diameter of ring 30 is slightly smaller than the diameter of groove 50 located in outer ferrule 28.
- Guage 32 is a thin-walled plastic or heavy paper collar whose inner diameter is only large enough to allow the collar to he slipped over threads 34 on coupling nut 26.
- FIG. 3 shows feed-through adapter assembly 58 of coaxial connector 14.
- the assembly includes an inner ferrule 60 and connector body 62.
- Inner ferrule 60 is a thin-walled cylinder whose forward or leading end '64 (toward the left of the drawing) is beveled inwardly.
- the outer diameter of innerferrule 60 other than beveled end 64 is slightly greater than inner diameter D of coaxial cable 12.
- Connector body62 contains external threads 66 on one end which are sized to be received by internal threads (not shown) in tap 10. Further, connector body 62 has a hexagonal surface 68 to facilitate assembly via a standard wrench. A recess 70, located between threads 66 and surface 68, is provided to receive O-ring 72. Internally, connector body 62 defines three concentric bores of differing diameters. The largest diameter bore is 74 and it contains internal threads 76 which mate with external threads 34 on coupling nut 26. A recess 78, located immediately adjacent to threads 76, receives O-ring 80. The next larger diameter bore is 82 and where it meets bore 74 a shoulder 84 is formed.
- the corner between bore 82 and shoulder 84 has been beveled as shown at 86.
- the diameter of bore 82 is large enough to accommodate inner ferrule 60 therein.
- the smallest diameter bore is 88 and whereit meets bore 82, shoulder 90 is formed.
- Shoulder 90 is of the same thickness as inner ferrule 60 and the diameter of bore 88 equals the inner diameter of inner ferrule 60.
- FIGS. 4 and 5 illustrate the assembly of coaxial connector 14 onto coaxial cable 12.
- outer ferrule 28 Prior to assembly on cable, outer ferrule 28 is inserted into coupling nut 26 to where rim 46 abuts against end 35 of the coupling nut.
- the portion of sleeve 44 which extends beyond end 37 of coupling nut 26 is flared outwardly as shown ,in FIG. 4 so that the outer ferrule cannot move longitudinally but can move rotationally.
- Cable retaining washer 30 is inserted into recess 50 in rim 46, coining over step 51 to lock the ring in place. Guage 32 is slid over threads34 on coupling nut 26.
- Connector body 62 with inner ferrule 60 staked into an interference fit in bore 82, is threaded onto coupling nut 26 as far as guage 32 permits.
- Coaxial cable 12 is then inserted into the partial assembly described above until touching contact is made with inner ferrule 60. At that point the cable cannot be slid further in without considerable force thus alerting the assembler that the cable has been pushed through cable retaining washer 30 the optimum distance. As the cable is pushed in, the inwardly extending spring fingers 52 tightly graspwasher 30 around the cable thereby looking it in threaded insert assembly 24.
- Connector body 62 is now backed off coupling nut 26.
- Feed through adapter assembly'58 may now be attached to a cable television directional tap 10 via external threads 66 and internal threads (not shown) on the tap as seen in FIG. 1 on the right side of tap 10.
- O-ring 72 seals the attachment in a manner well known in the art.
- both a portion of sleeve 44 and outer conductor 16 is expanded radially outwardly into bore 40 in coupling nut 26 with the net result that the inner diameter of the outer conductor is maintained through coaxial connector 14 and coaxial cable 12 is securely attached thereto without sever deformation as would occur in a clamp or crimp type connection.
- O-ring seals the connector against entry of water along the threads as seen in FIG. 5.
- a metal-to-metal seal in the expanded area of sleeve 44 and outer conductor 16 prevents water entry along the outer cable conductor.
- a novel feature of the present invention is that assembly of connector 14 is accomplished entirely with only standard wrenches; no special tools such as hand crimping devices are needed.
- a connector for terminating a semi-rigid coaxial cable of the type having a center conductor surrounded by a dielectric medium and an outer conductor having a given inner diameter which comprises:
- a. a insert assembly comprising 1. a coupling nut having external threads on one end and a longitudinal bore therethrough,
- an outer ferrule adapted to receive said cable, said ferrule having a sleeve and on one end of said sleeve a radially extending rim, said rim having a inwardly facing recess, said sleeve adapted to be positioned in said bore in said coupling nut, 3.
- a connector for terminating a semi-rigid coaxial 3.
- a retaining ring having teeth on the inner edge, cable for the propogation of high frequency signals,
- said ring positioned in said recess in Said rim and said coaxial cable having a metallic tubular outer conadapted to fit onto said cable whereby said teeth d t hi h omprises;
- an inner ferrule adapted to be inserted into Said b. an inner ferrule adapted to be driven into an end cable i inner ferrule hailing an inner diameter of said coaxial cable whereby said outer conductor substannany equal to the diameter of Said is pressed radially against said outer ferrule;
- a connector body having a passageway therethrough with a portion therein adapted to receive said inner ferrule and internal threads at one end adapted to threadedly receive said insert assembly whereby as said coupling nut threadedly engages said connector body, said inner ferrule is driven into said cable positioned within said outer ferrule thereby expanding said outer conductor against said outer ferrule.
- an inner ferrule having a beveled end, said ferrule c. housing means to contain said outer and inner ferrules.
- outer ferrule of claim 5 wherein a rim is posi tioned at one end of said sleeve portion and as said adapted to be inserted into the end of Said cable, inner ferrule presses said outer conductor thereagainst, b. a first housing adapted to hold said inner ferrule, Sald outer conductor exirlldes f lY- c. an outer ferrule adapted to receive said cable in- T fonnector of F 3 whereln 531d means to d therethrough, contain said outer and inner ferrules includes: (1.
- a ring having serrations on its inner edge and a couplmg nut adapted to Comm" 531d Outer adapted to slide over the end of said cable protrud- Yule thefeln; and i th h id outer f l id serrations b. a connector body adapted to contain said inner adapted to engage said cable, ferrule and further adapted to receive said coupling e. a second housing adapted to receive said outer ferrule and ring and further adapted to mate with said 8.
- the coupling nut of claim 7 wherein said outer ferfirst housing whereby said inner ferrule is driven rule is rotatably mounted therein. into said end of said cable.
Abstract
A coaxial cable connector featuring inner and outer ferrules between which the outer conductor of a semi-rigid cable is squeezed. The assembly of the connector onto the cable is accomplished with ordinary standard hand wrenches operating on an outer coupling containing the outer ferrule nut threadedly engaging a connector body containing the inner ferrule. The structure of the connector preserves the critical diameters of the coaxial cable thereby reducing or eliminating reflective loss of radio frequency energy.
Description
United States Patent [191 Forney, J r.
[ 1 Dec. 11, 1973 COAXIAL CONNECTOR [75] Inventor: Edgar Wilmot Forney, Jr.,
Harrisburg, Pa. [73] Assignee: AMP Incorporated, Harrisburg, Pa.
[22] Filed: May 12, 1972 [21] Appl. No.: 252,791
[521 U.S. C1. 174/88 C, 174/89, 339/89 C, 339/177 R [51] lnt. Cl ..1l02g 15/08 [58] Field 01 Search 174/88 C, 75 C, 89;
339/177 R, 177 E, 89 C [56] References Cited I UNITED STATES PATENTS 2,296,766 9/1942 Bruno 339/177 R 2,328,469 9/1943 Laffly 174/89 3,551,882 12/1970 OKeefe 174/75 C 3,184,706 5/1965 Atkins 174/89 X 3,469,014 9/1969 Papadopulos 174/89 X 2,995,388 9/1961 Morello, Jr. et al. 174/88 C X 3,245,027 4/1966 Ziegler, Jr 174/88 C X 3,701,086 10/1972 Somerset R 3,492,604 1/1970 Fan X 3,498,647 3/1970 Schroder 339/177 R X Primary ExaminerBernard A. Gilheany Assistant ExaminerA. T. Grimley Att0rneyWilliam J. Keating et al.
[57] ABSTRACT 8 Claims, 6 Drawing Figures SHEET 10? 2 PATENTEU DEC 1] 1975 PAIENIEDUEC n ma 3778535 sum 2 OF 2 COAXIAL CONNECTOR BACKGROUND OF THE INVENTION Semi-rigid coaxial cables have been developed for handling radio and ultrahigh frequency energy. Such cables typically have a center copper conductorand aluminum outer shield with air alarge part of the dielectric medium thereinbetween. These. conductors or cables are light weight and are'especially suitable for use in cable television systems. However, considerable difficulty has been experienced in developing a suitable connector for terminating the coaxial cable. ,Moreparticularly, difficulty is experiencedin securing the connector shell to the cable shield with sufficient strength so that the two will not separate underphysicalloads or fail under thermal cycling which are normal in actual field operations.
In general, workers in the field have developed several approaches in terminating coaxial cable. One approach has been to provide-a clamp or collet having interior teeth which are driven into the .outer conductor so as to provide the mechanical gripping action.
The approach noted above and other similar approaches well known to those skilled in theart possess some drawbacks. The first is that-the outer cable conductor is unsupported by the relatively weak cable dielectric at the clamping point so thatit-begins to collapse under load, i.e.,. itreduces radiallyso-that the electrical and mechanical connectionto theconnector body deteriorates.
In order to counter the collapse of'the outer conductor under clamping pressure a practicewas developed to insert a sleeve orferrule within and next to the outer cable conductor toprovide support. Thishelpedthe collapsing problem considerably but introduced another problem; the characteristic impedance of a coaxial cable is a function of the inner dimensions; thus, by inserting the ferrule into the cable,,the impedance at this point is changed and there is a reflective loss -in the frequency energybeing transmitted.
Accordingly, the present invention provides a device for terminating or connecting semi-rigid coaxial cable of the type having a center conductor surrounded by a dielectric medium and an outer conductor having a given inner diameter held to agiven close tolerance for efficient signal transfer, which comprises a threaded insert assembly which includes a coupling nut having external threads on one end and two longitudinal concentric bores therein, one of the bores being larger than the second, a outer ferrule having a sleeve portion and radially extending rim portion, the sleeve portion .adapted to slide into the coupling nut, and a retaining ring having teeth on the inner edges, the ring adapted to fit onto the cable, and.an adapter assembly which includes a connector body having .intemal threads adapted to receive the external threads on the coupling nut, .and also having three, longitudinal, concentric bores of differingdiameters, and'a inner ferrule having a beveled end, the ferruleadapted to'be vhoused in one of the bores in the connector body and further adapted to be inserted into aendof the cablewhen the coupling nut and connector body are threadedly joined.
BRIEF DESCRIPTION OFTHE DRAWINGS FIG. 1 illustrates a-CATV directional tap to .which semi-rigid coaxial cable is connected utilizing the present invention;
FIG. 1A shows details of the coaxial cable of FIG. 1;
FIG.2 is a perspective, exploded and partially sectioned view of one half of the connector construction in accordance with the present invention;
FIG. 3 is a perspective exploded and partially sectioned view of another half of the connector constructed in accordance with the present invention; and
FIGS. 4 and 5 illustrate the assembly of the connector shown in FIGS. 2 and 3 to a coaxial cable.
DESCRIPTION OF THE PREFERRED EMBODIMENT A CATV directional tap, designated at 10 in FIG. 1, .is used, either on over-head lines or underground, to provide television signals, entering therein from distribution coaxial cable 12 attached thereto via coaxial vconnector14, to the homes located along the TV cable. Tap 10 is a conventional directional coupler and splitter such as manufactured by Jerrold Electronics, Inc. In the modelshown in FIG. 1, tap 10 contains a circuitry -(not,shown).which sends the TV signals into .four different homes via house tapslS (of which only two are seen).
It is very important to avoid or at least minimize any change in this dimension. Where a change results in a mismatch of cable impedance and from that a reflective loss of radio frequency (R.F.) energy.
In accordance with the inventive concept a termination of coaxial cable 12 shown in FIG. 1A is provided through coaxial connector 14 which eliminates damaging deformation to cable 12 and which provides a means for attaching cable 12 to tap 10 without the use of special tools. Coaxial connector 14 is shown in detail in FIGS. 2 and 3 to which reference is now made.
FIG. 2 shows threaded insert assembly 24 of coaxial connector 14. The assembly includes a housing or coupling nut 26, outer ferrule 28 and cable retaining ring 30. FIG. 2 also shows guage 32 which is provided to insure proper installation of connector 14 onto cable 12 aswill-be described in detail below.
.Sleeve.44 is thin walled and is slightly longer than coupling nut 26. Rim 46extends outwardly for a distance slightly less than the root diameter of external threads '34 on coupling nut 26. Internally, outer ferrule 28 defines .a bore .48, andwithin rim 46 a internal, annular recess having .a step 51. The diameter of bore 48 is slightly greater than the outer diameter of coaxial cable 12 and the diameter of recess 50 within step 51 is sized to receive therein cable retaining ring 30.
FIG. 3 shows feed-through adapter assembly 58 of coaxial connector 14. The assembly includes an inner ferrule 60 and connector body 62.
. Connector body62 contains external threads 66 on one end which are sized to be received by internal threads (not shown) in tap 10. Further, connector body 62 has a hexagonal surface 68 to facilitate assembly via a standard wrench. A recess 70, located between threads 66 and surface 68, is provided to receive O-ring 72. Internally, connector body 62 defines three concentric bores of differing diameters. The largest diameter bore is 74 and it contains internal threads 76 which mate with external threads 34 on coupling nut 26. A recess 78, located immediately adjacent to threads 76, receives O-ring 80. The next larger diameter bore is 82 and where it meets bore 74 a shoulder 84 is formed. The corner between bore 82 and shoulder 84 has been beveled as shown at 86. The diameter of bore 82 is large enough to accommodate inner ferrule 60 therein. The smallest diameter bore is 88 and whereit meets bore 82, shoulder 90 is formed. Shoulder 90 is of the same thickness as inner ferrule 60 and the diameter of bore 88 equals the inner diameter of inner ferrule 60.
ASSEMBLY OF THE PREFERRED EMBODIMENT FIGS. 4 and 5 illustrate the assembly of coaxial connector 14 onto coaxial cable 12.
Prior to assembly on cable, outer ferrule 28 is inserted into coupling nut 26 to where rim 46 abuts against end 35 of the coupling nut. The portion of sleeve 44 which extends beyond end 37 of coupling nut 26 is flared outwardly as shown ,in FIG. 4 so that the outer ferrule cannot move longitudinally but can move rotationally. Cable retaining washer 30 is inserted into recess 50 in rim 46, coining over step 51 to lock the ring in place. Guage 32 is slid over threads34 on coupling nut 26.
With reference to FIG. 5, final assembly of coaxial connector 14 takes place when threaded insert assembly 24, with coaxial cable 12 attached thereto via the manner disclosed above and with guage 32 removed, is threadedly attached to feed through adapter assembly 58. As coupling nut 26, which can rotate freely about outer ferrule 28 and cable 12 attached thereto, is threaded into connector body 62, inner ferrule 60 enters inside outer conductor 16 and begins to spread it radially outwardly, beveled end 64 aiding in a manner well known in the art. As the inner ferrule is advanced farther into the cable, the outer conductor is squeezed against rim 46 where it becomes thinned; i.e., the outer conductor is longitudinally extruded in either direction away from the rim. In addition, both a portion of sleeve 44 and outer conductor 16 is expanded radially outwardly into bore 40 in coupling nut 26 with the net result that the inner diameter of the outer conductor is maintained through coaxial connector 14 and coaxial cable 12 is securely attached thereto without sever deformation as would occur in a clamp or crimp type connection.
As coupling nut 26 bottoms out clamping rim 46 to connector body 62, O-ring seals the connector against entry of water along the threads as seen in FIG. 5. A metal-to-metal seal in the expanded area of sleeve 44 and outer conductor 16 prevents water entry along the outer cable conductor.
A novel feature of the present invention is that assembly of connector 14 is accomplished entirely with only standard wrenches; no special tools such as hand crimping devices are needed.
As is now apparent, the assembly is quick, sure and uncomplicated so that only simple installation instructions are required.
Another novel feature of the present invention is that the coaxial connector disclosed herein maintains the characteristic impedance of the coaxial cable to which it is attached.
Though the invention has been described with respect to a specific preferred embodiment thereof, many variations and modifications thereof will immediately become apparent to those skilled in the art. It is therefor the intention that the appended claims be interpreted as broadly as possible in view of the prior art to include all such variations and modifications.
What is claimed is:
l. A connector for terminating a semi-rigid coaxial cable of the type having a center conductor surrounded by a dielectric medium and an outer conductor having a given inner diameter, which comprises:
a. a insert assembly comprising 1. a coupling nut having external threads on one end and a longitudinal bore therethrough,
' 2. an outer ferrule adapted to receive said cable, said ferrule having a sleeve and on one end of said sleeve a radially extending rim, said rim having a inwardly facing recess, said sleeve adapted to be positioned in said bore in said coupling nut, 3. A connector for terminating a semi-rigid coaxial 3. a retaining ring having teeth on the inner edge, cable for the propogation of high frequency signals,
said ring positioned in said recess in Said rim and said coaxial cable having a metallic tubular outer conadapted to fit onto said cable whereby said teeth d t hi h omprises;
p Said Cable; and 5 a. an outer ferrule adapted to receive an end of said an adapter assembly comprising coaxial cable inserted therein;
an inner ferrule adapted to be inserted into Said b. an inner ferrule adapted to be driven into an end cable i inner ferrule hailing an inner diameter of said coaxial cable whereby said outer conductor substannany equal to the diameter of Said is pressed radially against said outer ferrule; and
outer conductor; 1
2. a connector body having a passageway therethrough with a portion therein adapted to receive said inner ferrule and internal threads at one end adapted to threadedly receive said insert assembly whereby as said coupling nut threadedly engages said connector body, said inner ferrule is driven into said cable positioned within said outer ferrule thereby expanding said outer conductor against said outer ferrule.
2. A connector to connect an end of a semi-rigid cable to a cable television directional tap or the like, said connector comprising:
a. an inner ferrule having a beveled end, said ferrule c. housing means to contain said outer and inner ferrules.
4. The connector of claim 3 wherein the inner diameter of said inner ferrule substantially equals the inner diameter of said metallic tubular outer conductor.
5. The connector of claim 3 wherein said outer ferrule has a deformable inelastic sleeve portion whereby as said inner ferrule presses said outer conductor outwardly and radially, said outer conductor and said sleeve portion surrounding said conductor are deformed outwardly and radially.
6. The outer ferrule of claim 5 wherein a rim is posi tioned at one end of said sleeve portion and as said adapted to be inserted into the end of Said cable, inner ferrule presses said outer conductor thereagainst, b. a first housing adapted to hold said inner ferrule, Sald outer conductor exirlldes f lY- c. an outer ferrule adapted to receive said cable in- T fonnector of F 3 whereln 531d means to d therethrough, contain said outer and inner ferrules includes: (1. a ring having serrations on its inner edge and a couplmg nut adapted to Comm" 531d Outer adapted to slide over the end of said cable protrud- Yule thefeln; and i th h id outer f l id serrations b. a connector body adapted to contain said inner adapted to engage said cable, ferrule and further adapted to receive said coupling e. a second housing adapted to receive said outer ferrule and ring and further adapted to mate with said 8. The coupling nut of claim 7 wherein said outer ferfirst housing whereby said inner ferrule is driven rule is rotatably mounted therein. into said end of said cable.
Claims (11)
1. A connector for terminating a semi-rigid coaxial cable of the type having a center conductor surrounded by a dielectric medium and an outer conductor having a given inner diameter, which comprises: a. a insert assembly comprising 1. a coupling nut having external threads on one end and a longitudinal bore therethrough, 2. an outer ferrule adapted to receive said cable, said ferrule having a sleeve and on one end of said sleeve a radially extending rim, said rim having a inwardly facing recess, said sleeve adapted to be positioned in said bore in said coupling nut, 3. a retaining ring having teeth on the inner edge, said ring positioned in said recess in said rim and adapted to fit onto said cable whereby said teeth grip said cable; and b. an adapter assembly comprising 1. an inner ferrule adapted to be inserted into said cable, said inner ferrule having an inner diameter substantially equal to the inner diameter of said outer conductor; 2. a connector body having a passageway therethrough with a portion therein adapted to receive said inner ferrule and internal threads at one end adapted to threadedly receive said insert assembly whereby as said coupling nut threadedly engages said connector body, said inner ferrule is driven into said cable positioned within said outer ferrule thereby expanding said outer conductor against said outer ferrule.
2. an outer ferrule adapted to receive said cable, said ferrule having a sleeve and on one end of said sleeve a radially extending rim, said rim having a inwardly facing recess, said sleeve adapted to be positioned in said bore in said coupling nut,
2. A connector to connect an end of a semi-rigid cable to a cable television directional tap or the like, said connector comprising: a. an inner ferrule having a beveled end, said ferrule adapted to be inserted into the end of said cable, b. a first housing adapted to hold said inner ferrule, c. an outer ferrule adapted to receive said cable inserted therethrough, d. a ring having serrations on its inner edge and adapted to slide over the end Of said cable protruding through said outer ferrule, said serrations adapted to engage said cable, e. a second housing adapted to receive said outer ferrule and ring and further adapted to mate with said first housing whereby said inner ferrule is driven into said end of said cable.
2. a connector body having a passageway therethrough with a portion therein adapted to receive said inner ferrule and internal threads at one end adapted to threadedly receive said insert assembly whereby as said coupling nut threadedly engages said connector body, said inner ferrule is driven into said cable positioned within said outer ferrule thereby expanding said outer conductor against said outer ferrule.
3. a retaining ring having teeth on the inner edge, said ring positioned in said recess in said rim and adapted to fit onto said cable whereby said teeth grip said cable; and b. an adapter assembly comprising
3. A connector for terminating a semi-rigid coaxial cable for the propogation of high frequency signals, said coaxial cable having a metallic tubular outer conductor, which comprises: a. an outer ferrule adapted to receive an end of said coaxial cable inserted therein; b. an inner ferrule adapted to be driven into an end of said coaxial cable whereby said outer conductor is pressed radially against said outer ferrule; and c. housing means to contain said outer and inner ferrules.
4. The connector of claim 3 wherein the inner diameter of said inner ferrule substantially equals the inner diameter of said metallic tubular outer conductor.
5. The connector of claim 3 wherein said outer ferrule has a deformable inelastic sleeve portion whereby as said inner ferrule presses said outer conductor outwardly and radially, said outer conductor and said sleeve portion surrounding said conductor are deformed outwardly and radially.
6. The outer ferrule of claim 5 wherein a rim is positioned at one end of said sleeve portion and as said inner ferrule presses said outer conductor thereagainst, said outer conductor extrudes longitudinally.
7. The connector of claim 3 wherein said means to contain said outer and inner ferrules includes: a. a coupling nut adapted to contain said outer ferrule therein; and b. a connector body adapted to contain said inner ferrule and further adapted to receive said coupling nut.
8. The coupling nut of claim 7 wherein said outer ferrule is rotatably mounted therein.
Applications Claiming Priority (1)
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US25279172A | 1972-05-12 | 1972-05-12 |
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US00252791A Expired - Lifetime US3778535A (en) | 1972-05-12 | 1972-05-12 | Coaxial connector |
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US (1) | US3778535A (en) |
JP (1) | JPS4949190A (en) |
AR (1) | AR194541A1 (en) |
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CA (1) | CA985392A (en) |
DE (1) | DE2322149A1 (en) |
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Cited By (109)
Publication number | Priority date | Publication date | Assignee | Title |
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US3868771A (en) * | 1972-05-08 | 1975-03-04 | British Insulated Callenders | Jointing metal cable sheaths |
US3879102A (en) * | 1973-12-10 | 1975-04-22 | Gamco Ind Inc | Entrance connector having a floating internal support sleeve |
US3904264A (en) * | 1974-03-04 | 1975-09-09 | Continental Oil Co | Electrical connector |
US3907399A (en) * | 1972-12-12 | 1975-09-23 | Georg Spinner | HF coaxial plug connector |
US4173385A (en) * | 1978-04-20 | 1979-11-06 | Bunker Ramo Corporation | Watertight cable connector |
US4226495A (en) * | 1979-04-27 | 1980-10-07 | Texscan Corporation | Cable system subscriber tap with rotating center conductor seizure apparatus and spiral contact and method for using same |
US4305638A (en) * | 1977-09-21 | 1981-12-15 | Bunker Ramo Corporation | Coaxial connector with gasketed sealing cylinder |
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Also Published As
Publication number | Publication date |
---|---|
AU5469773A (en) | 1974-10-24 |
AR194541A1 (en) | 1973-07-23 |
FR2184774A1 (en) | 1973-12-28 |
GB1404515A (en) | 1975-08-28 |
IT984186B (en) | 1974-11-20 |
ATA418373A (en) | 1976-04-15 |
ES414585A1 (en) | 1976-03-01 |
BE799447A (en) | 1973-11-12 |
NL7306464A (en) | 1973-11-14 |
BR7303457D0 (en) | 1974-07-11 |
AT333872B (en) | 1976-12-10 |
JPS4949190A (en) | 1974-05-13 |
CA985392A (en) | 1976-03-09 |
DE2322149A1 (en) | 1973-11-29 |
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