EP0380210A2 - Fiche à temporisation compensée - Google Patents

Fiche à temporisation compensée Download PDF

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Publication number
EP0380210A2
EP0380210A2 EP90300227A EP90300227A EP0380210A2 EP 0380210 A2 EP0380210 A2 EP 0380210A2 EP 90300227 A EP90300227 A EP 90300227A EP 90300227 A EP90300227 A EP 90300227A EP 0380210 A2 EP0380210 A2 EP 0380210A2
Authority
EP
European Patent Office
Prior art keywords
cable
jack
conductor
pathway
connection means
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.)
Withdrawn
Application number
EP90300227A
Other languages
German (de)
English (en)
Other versions
EP0380210A3 (fr
Inventor
Harlan A. Pastor
Bruce C. Ogren
Todd A. Morgenstern
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.)
Commscope Connectivity LLC
Original Assignee
ADC Telecommunications Inc
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 ADC Telecommunications Inc filed Critical ADC Telecommunications Inc
Publication of EP0380210A2 publication Critical patent/EP0380210A2/fr
Publication of EP0380210A3 publication Critical patent/EP0380210A3/fr
Withdrawn legal-status Critical Current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
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/42—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency comprising impedance matching means or electrical components, e.g. filters or switches
    • H01R24/46—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency comprising impedance matching means or electrical components, e.g. filters or switches comprising switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles
    • 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
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/54—Intermediate parts, e.g. adapters, splitters or elbows
    • H01R24/542—Adapters

Definitions

  • This invention pertains to a jack assembly. More particularly, this invention pertains to a jack assembly for use in video transmissions where the jack assembly includes delay compensated elements.
  • the present invention is anticipated for use in the transmission of color video signals.
  • the timing relationship of various color signals determines the ability, to select at will, any of those circuits, using a video routing switcher to make that selection. If the timing relationship between those circuits is not correct, the hues of the various video signals will not be correct relative to each other, requiring recalibration of the signal as it is selected. This recalibration is both impractical and inconvenient.
  • the various pieces of video transmission equipment being used must be adjusted in order to maintain a proper timing relationship between all of the equipment and the routing switcher to which they are all connected.
  • One of the most important factors effecting this timing relationship is the length of coaxial video cable between each piece of equipment and the routing switcher. Any change in the length of coaxial video cable in a given circuit will effect the timing relationship of that circuit relative to the other circuits in that system.
  • video jack fields are connected between the various pieces of equipment. However, if any re-routing of the signal path occurs during the broadcast, the timing relationships of the equipment must be preserved.
  • a patch cord is simply a length of cable having plugs on both ends.
  • To re-route a signal one plug of the patch cord is inserted in a jack having the incoming signal and the second plug is inserted in a jack connected to the secondary equipment to which the signal is to be re-routed.
  • a given length of cable i.e. the length of the patch cord
  • this additional length of cable could result in loss of calibration and hue distortion.
  • Video Pro Patch MkIITM An example of such a product is shown on pages 24 and 25 of an April 1988 brochure of ADC Telecommunications entitled Professional Audio and Video Products.
  • a jack circuit or jack assembly consists of two jacks.
  • the first jack receives the signal and the second jack directs a signal to a desired piece of video transmission equipment.
  • the two jacks are connected by a length of cable (referred to as a compensation loop) equal to the length of a patch cord to be used with the jack field.
  • a compensation loop equal to the length of a patch cord to be used with the jack field.
  • the Video Pro Patch MkIITM currently includes a three foot compensation loop which would require that the jack field be used with a three foot patch cord. If a four foot patch cord were desired, the compensation loop would need to be four feet in length.
  • the failure to account for the three foot length of patch cord could result in a six degree phase shift.
  • phase or delay compensated jack fields such as a Video Pro Patch MkIITM
  • are functionally acceptable they present certain disadvantages. For example, the need to have two jacks per jack assembly connected by three feet of coaxial cable results in a jack field which is bulky and expensive. Accordingly, notwithstanding the functional acceptability of such prior art delay compensated jack fields, a continued need for an improved video jack field persists.
  • a compensated jack which includes first second and third ports for connection to first, second and third, respectively, coaxial cables.
  • a first signal pathway is provided within the jack for electrically connecting a first and second cable when connected to the first and second ports, respectively.
  • a second signal pathway is provided within the jack for electrically connecting the first cable to a third cable when the cables are connected to the first and third ports, respectively.
  • the first signal pathway includes circuit elements selected to induce a predetermined signal compensation into a signal passing through the first pathway.
  • a switch mechanism is provided for opening the first pathway when the third cable is connected to the third port.
  • a jack assembly 1 (alternatively known as a jack circuit) of a prior art jack field (such as the aforementioned ADC Video Pro Patch MkIITM is shown.
  • the jack assembly 1 includes two jacks 20,20′. Each of jacks 20,20′ are identical and are disposed with jack 20 being physically placed above jack 20′. Jacks 20,20′ are physically connected to a front panel 6 of a housing 8.
  • the housing includes a back panel 10 which is spaced from front panel 6.
  • Jacks such as jacks 20,20′ are such as those manufactured by ADC Telecommunications under the product designation SJ1000.
  • An example of such a jack is shown with greater particularity in U.S. Patent No. 4,749,968 issued June 7, 1988 (which shows an improved version of the prior art SJ1000.
  • Jacks 20,20′ include front ports 50 and 50′ which are exposed through front wall 6. Both of jacks 20,20′ include a pair of rear coaxial cable connectors 54, 55 and 54′, 55′. Disposed within housing 8 is a compensation loop 24 of coaxial cable extending between coaxial cable connectors 55 and 55′.
  • a pair of jack couplings 26, 26′ are mounted on back wall 10 with jack coupling 26 connected via coaxial cable 30 to cable connector 54. Similarly, jack coupling 26′ is connected via coaxial cable 30′ to cable connector 54′.
  • Ports 50, 50′ are ports to receive a coaxial plug as is known in the art.
  • Jack couplings 26, 26′ are BNC-type connectors to receive a coaxial cable bayonet plug connection as is known in the art.
  • Fig. 2 of the aforesaid patent where the jack is shown in cross-­section.
  • the rear body of the jack is not provided with cable connectors such as 54, 55 but with BNC connectors being directly connected to the jack body.
  • cable connectors such as 54, 55 but with BNC connectors being directly connected to the jack body.
  • BNC connectors being directly connected to the jack body.
  • Conductor 150 extends from the forward port (numeral 50 in the aforesaid patent) to the rear BNC connector 54.
  • Conductor 158 extends from the second BNC connector and is essentially parallel to conductor 150.
  • a V-shaped spring conductor 164 Disposed between conductors 150 and 158 is a V-shaped spring conductor 164.
  • a switch assembly 156 is provided which includes cam surfaces which are engaged by a plug inserted within port 50. The engagement of the cam surface by the plug inserted within port 50 urges the spring conductor 164 out of electrical contact with conductor 150.
  • Fig. 11 of the aforesaid patent shows the relation of the various mechanical elements of the jack in response to a plug 52 being inserted within the port 50.
  • jack coupling 26 is an IN port and jack coupling 26′ is a OUT port.
  • a signal from a piece of transmitting equipment (such as a television camera) is connected via a coaxial cable to jack coupling 26.
  • OUT port 26′ is connected via a coaxial cable to subsequent broadcasting equipment (such as a video recorder).
  • the signal from the television camera passes through the jack assembly indicated in the path A.
  • a patch cord 36 is employed.
  • a patch cord 36 is used with the jack assembly 1 of Fig. 1.
  • the patch cord 36 is shown as including a coaxial cable 38 extending between plugs 41 and 42.
  • Plug 41 is inserted within port 50.
  • Plug 42 is routed to a different jack assembly port (similar to port 50 or 50′) of a different jack assembly (now shown).
  • the length of compensation loop 24 is selected to equal the length of patch cord 36.
  • the electrical characteristics (such as phase shift) of the compensation loop 24 and patch cord 36 are matched.
  • compensation loop 24 Since compensation loop 24 is factory installed, the user of the jack assembly 1 or a jack filed incorporating the same is restricted to a patch cord 36 having a length equal to the length of compensation loop 24. Commonly, such patch cord and compensation loops have lengths of about three feet however, they could be four feet or any other length.
  • a user of the jack assembly could patch into port 50′. This would input a new signal through jack coupling 26′ and break the signal coming from jack 20 through jack 20′.
  • a first conductor 150 extends from port 50 to cable connector 54.
  • a second conductor 150 extends from port 50′ to cable connector 54′.
  • a conductor 158 extends from connector 55 to a switch member 156.
  • Conductor 158 is connected by a spring conductor 164 to conductor 150.
  • the internal elements are identical and are numbered simply with the addition of an apostrophe.
  • the total jack system is connected to a ground as indicated by the phantom lines 165.
  • Switch mechanism 156 is connected via resistor 166 to ground 165.
  • the compensation loop 24 is shown connecting cable connections 55 and 55′.
  • the jack 40 includes a housing body 42 having a forward section 43 and a rear section 44.
  • the forward section 43 includes ports 46 and 48 and a mounting flange 51 for mounting the jack 40 to a forward wall (not shown) of a jack field housing.
  • the rear portion 44 of housing 40 includes jack couplings 52 and 53.
  • Coupling 52 is coaxially aligned with port 46.
  • coupling 53 is coaxially aligned with port 48.
  • Ports 46 and 48 are standard ports for receiving a coaxial plug.
  • Couplings 52 and 53 are BNC-type connectors for receiving standard coaxial cable bayonet type connectors.
  • a first conductor 150 extends axially through the body coaxial with port 46 and coupling 52.
  • a second conductor 158 extends through the body 42 coaxially aligned with port 48 and coupling 53.
  • Conductors 150 and 158 are those such as described in the aforementioned U.S. Patent 4,794,968.
  • a switch mechanism 156 and a delay circuit 62 Disposed within housing 42 between parallel conductors 150 and 158 is a switch mechanism 156 and a delay circuit 62.
  • Delay circuit 62 and switch mechanism 156 are best shown in Fig. 13 where the rear portion 44 of the housing body has been removed and where conductors 150 and 158 have been removed.
  • Delay circuit 62 includes first and second spring conductors 64 and 66.
  • Spring conductors 64, 66 are mirror images of one another and include spring contact portions 64a, 66a and conductor strips 64b, 66b integrally connected to spring contacts 64a, 66a, respectively.
  • conductor 66 is shown separately in Fig. 12. (Spring conductors 64, 66 should be contrasted with the spring contact 164 of U.S. Patent 4,749,968 which is of unitary construction extending directly between the parallel conductors to form a direct electrical connection.)
  • spring conductors 64, 66 are disposed such that spring contact portions 64a, 66a are resiliently urged against conductors 150, 158 respectively.
  • Conductor strips 64b, 66b extend from the contact portions 64a, 66a rearwardly into the second portion 44 of the housing body 42.
  • the conductor strips 64b, 66b terminate at upwardly projecting tabs 64c, 66c.
  • a solid state circuit element known as a delay line 68 which includes a first lead 68a and a second lead 68b.
  • Lead 68a is electrically connected to tab 64c.
  • lead 68b is electrically connected to tab 66c.
  • Delay line 68 includes a third lead (not shown) which is a ground lead which may be grounded in any suitable manner (such as direct connection to the jack body 42). The combination of the spring conductors 64, 66 and circuit element 68 form the delay circuit 62.
  • Switch mechanism 156 may be such as that described in the aforesaid U.S. Patent No. 4,749,968. As shown in Fig. 13, switch mechanism 156 includes a generally V-shaped conductor 70 having a free end of a first arm 72 opposing spring contact portion 64a and a free end of a second arm 74 opposing contact portion 66a. Dielectric posts 200, 201 contain arms 72, 74, respectively, to prevent them spreading too far apart.
  • First arm 72 is provided with a pad 76 of dielectric material to act as a cam surface as will be described.
  • second arm 74 is provided with a pad 78 of dielectric material to act as a cam surface.
  • Pads 76, 78 are disposed to be physically engaged by a coaxial plug inserted within ports 46, 48, respectively.
  • Switch mechanism 156 functions similar to that of U.S. Patent No. 4,749,968. Namely, the insertion of a plug 61 into port 46 causes the plug 61 to engage pad 76 to urge the free end of contact 72 into electrical and mechanical contact with contact portion 64a. This urges contact portion 64a out of electrical contact with conductor 150.
  • the free end of arm 72 acts as a push point to push contact portion 64a. This arrangement is shown in the view of Fig. 9.
  • Fig. 6 is a schematic representation of the jack 40 of the present invention when no plug is received within either of ports 46 and 48.
  • Fig. 11 shows the schematic representation of the structure of the present invention when a plug 61 is received within port 46.
  • spring contact 64 is in electrical contact with conductor 150 at a contact point C.
  • spring contact 66 is in electrical contact with conductor 158 at a contact point D.
  • a first signal pathway extends between connector 52 and 53. The signal passes from connector 52, through conductor 150, to contact point C, to spring conductor 64, through circuit element 68, through spring conductor 66, to contact point D, and through conductor 158 to connector 53.
  • the body of the jack is shown schematically as the phantom line 80 connected to ground 82.
  • the switch mechanism 156 is connected to ground across a resistor 84.
  • a preferred resistance is 75 ohm. However, those skilled in the art will recognize that other resistance levels can be selected.
  • the jack is provided with two ports 46 and 48 on its forward end.
  • Fig. 8 shows an alternative embodiment where only one port 46 is shown.
  • conductor 158 is shortened as indicated by conductor 158′ in Fig. 8.
  • connectors 52 and 53 are replaced by coaxial cables 52′ and 53′ which are directly connected to conductors 150, 158′ respectively.
  • the jack of Fig. 8 is identical to that of the jack of Fig. 7.
  • the delay circuit 62 includes the combination of spring conductors 64, 66 and a circuit element 68.
  • the circuit element is what is known as a delay line such as product designation "ST Series" of the ESC Electronics, Corp. of Palisades Park, New Jersey shown in their brochure “Delay lines and Transformers”.
  • Circuit element 68 is selected to impart a delay into a signal passing through the circuit element.
  • the amount of the delay is selected for the circuit element 68 to simulate a length of coaxial cable equal to a predetermined length of a patch cord to be used with the jack.
  • circuit element 68 is preferably selected to impart a delay equal to the length of time it takes a signal to travel the length of a three foot patch cord. This is of about 5.5 nanoseconds.
  • a delay of about 7.3 nanoseconds would be preferred and that circuit element 68 should be so selected.
  • circuit elements such as element 68 are commercially available items such as the Series ST miniature signal delay line of the ESC Electronics Corp. and form no part of this invention per se.
  • the jack 40 can be used in place of a prior art jack assembly for cross-connecting video equipment.
  • the jack can operate in three modes. In the first mode of operation, the jack is unpatched as indicated in Fig. 5. When unpatched, no signals are re-­ routed and the signal path is indicated by phantom line E of Fig. 5.
  • a television signal enters rear port 52 and passes through the first signal pathway (port 52, to contact C through circuit element 68 to contact D and to port 54).
  • a plug is inserted into either of port 46 and 48.
  • the delay circuit 62 is grounded through the switch mechanism 156 and resistor 84.
  • the signal passes directly from connector 52 through conductor 150 to the jack plug 61 inserted into port 46. This path is shown as line F in Fig. 10.
  • the jack can also be used in a dual patch mode of operation where plugs are inserted into both ports 46 and 48.
  • the signal from plug 52 travels directly to port 46.
  • an input signal into port 48 travels directly to port 53.
  • a prior art jack assembly required two jack bodies connected by an intermediate inter-connecting loop which was commonly three feet in length.
  • This structure has been modified so that the complete jack assembly can now consist of a single jack having no intermediate loops.
  • These benefits can be visually seen by a simple inspection of Figs. 3 and 5.
  • the overall length i.e. the dimension from forward ports 50, 50′ to rear ports 26, 26′
  • the intermediate compensation loop commonly three feet in length
  • the need for two jack bodies has been replaced with a single jack body.
  • the advantages of the design of the present invention is reduced labor and material cost and a great reduction in the package size for each circuit. Since numerous jack assemblies are included in each jack field, the overall costs and physical size requirements for an entire jack field are greatly reduced.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Pulse Circuits (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
EP19900300227 1989-01-27 1990-01-09 Fiche à temporisation compensée Withdrawn EP0380210A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30371989A 1989-01-27 1989-01-27
US303719 1989-01-27

Publications (2)

Publication Number Publication Date
EP0380210A2 true EP0380210A2 (fr) 1990-08-01
EP0380210A3 EP0380210A3 (fr) 1990-12-19

Family

ID=23173373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900300227 Withdrawn EP0380210A3 (fr) 1989-01-27 1990-01-09 Fiche à temporisation compensée

Country Status (4)

Country Link
EP (1) EP0380210A3 (fr)
JP (1) JPH02260380A (fr)
CN (1) CN1044550A (fr)
CA (1) CA2005344A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993020600A1 (fr) * 1992-04-02 1993-10-14 Adc Telecommunications, Inc. Module de jack coaxial miniaturise
WO1999007040A1 (fr) * 1997-07-31 1999-02-11 Telefonaktiebolaget Lm Ericsson (Publ) Connecteur coaxial
US6554652B1 (en) 2002-02-15 2003-04-29 Adc Telecommunications, Inc. Jack assembly including baluns interface; and methods
US6632106B2 (en) 2001-07-24 2003-10-14 Adc Telecommunications, Inc. Jack; jack assembly; and methods

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568096A (en) * 1969-08-11 1971-03-02 Bell Telephone Labor Inc Apparatus for automatically switching high frequency signals
EP0230746A2 (fr) * 1985-12-13 1987-08-05 Adc Telecommunications, Inc. Dispositif à jack
JPS631263A (ja) * 1986-06-20 1988-01-06 Olympus Optical Co Ltd 電子式内視鏡装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568096A (en) * 1969-08-11 1971-03-02 Bell Telephone Labor Inc Apparatus for automatically switching high frequency signals
EP0230746A2 (fr) * 1985-12-13 1987-08-05 Adc Telecommunications, Inc. Dispositif à jack
JPS631263A (ja) * 1986-06-20 1988-01-06 Olympus Optical Co Ltd 電子式内視鏡装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 12, no. 200 (E-619), 9th June 1988; & JP-A-63 001 263 (OLYMPUS) 06-01-1988 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993020600A1 (fr) * 1992-04-02 1993-10-14 Adc Telecommunications, Inc. Module de jack coaxial miniaturise
US5467062A (en) * 1992-04-02 1995-11-14 Adc Telecommunications, Inc. Miniature coax jack module
AU676994B2 (en) * 1992-04-02 1997-04-10 Adc Telecommunications, Incorporated Miniature coax jack module
WO1999007040A1 (fr) * 1997-07-31 1999-02-11 Telefonaktiebolaget Lm Ericsson (Publ) Connecteur coaxial
US6139369A (en) * 1997-07-31 2000-10-31 Telefonaktiebolaget Lm Ericsson Coaxial connector for equipment in a transmission network
US6632106B2 (en) 2001-07-24 2003-10-14 Adc Telecommunications, Inc. Jack; jack assembly; and methods
US6554652B1 (en) 2002-02-15 2003-04-29 Adc Telecommunications, Inc. Jack assembly including baluns interface; and methods

Also Published As

Publication number Publication date
CN1044550A (zh) 1990-08-08
EP0380210A3 (fr) 1990-12-19
CA2005344A1 (fr) 1990-07-27
JPH02260380A (ja) 1990-10-23

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