EP1793456A1 - Dispositif de verrouillage pour résistance de terminaison - Google Patents

Dispositif de verrouillage pour résistance de terminaison Download PDF

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Publication number
EP1793456A1
EP1793456A1 EP05447248A EP05447248A EP1793456A1 EP 1793456 A1 EP1793456 A1 EP 1793456A1 EP 05447248 A EP05447248 A EP 05447248A EP 05447248 A EP05447248 A EP 05447248A EP 1793456 A1 EP1793456 A1 EP 1793456A1
Authority
EP
European Patent Office
Prior art keywords
connector
safety
safety device
anyone
orifice
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Withdrawn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
EP05447248A
Other languages
German (de)
English (en)
Inventor
Huu-Tung Dinh-Debouny
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP05447248A priority Critical patent/EP1793456A1/fr
Publication of EP1793456A1 publication Critical patent/EP1793456A1/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Withdrawn legal-status Critical Current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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • H01R13/6397—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap with means for preventing unauthorised use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/44—Means for preventing access to live contacts
    • H01R13/443—Dummy plugs

Definitions

  • the present invention is related to a coaxial electric connector, preferably a HF coaxial connector or a fibre optic connector with a coaxial envelope, provided with a locking device.
  • the invention addresses a filter or a terminator provided with a locking device, intended to equip couplers or multi-taps in the field of community antenna or cable TV (CATV).
  • the purpose of the filter or the terminator typically is to allow access to pay-TV programs only to those who are authorised therefor.
  • the locking device's function is to prevent fraudulent removal of the filter.
  • the invention would find application in any field wherein it is desirable to prevent unauthorised separation of coaxial male and female connectors.
  • CATV coax networks comprise mother lines or trunks split by use of directional couplers, which generate coupled line extenders including at their turn a number of couplers or multi-taps providing the final signal distribution to individual subscribers.
  • n-way multi-taps are installed outdoor at the front of buildings, with apparent output ports comprising female coaxial plugs for connection to drop lines bringing CATV signal to the effective subscribers.
  • Some plugs may be access-forbidden or unused, especially when they service subscribers with specific pay programs. Desired corresponding access restriction is usually provided by screwing some terminators on unused output ports. Terminators have the double function of matching impedance of the signal-carrying coaxial cable and preventing trivial signal pirating by connecting a drop cable to any unused output port.
  • a number of such tamper-resistant locking devices are known (for example, see US-A-3,845,454 , US-A-5,106,312 , US-A-5,273,444 , US-B-6,491,546 , US-A-2005/0208883 ).
  • These applications are based on the same principle : an internal cylindrical connector comprising a resistive load (e.g. 75 ohm) is encapsuled in a concentric external shield.
  • the shield rotates freely about the connector, owing to a retaining snap ring for example and it is impossible to remove the connector without a dedicated tool.
  • the latter is generally designed to be introduced axially in the terminator for accessing the connector and screwing/unscrewing it.
  • the coupling is obtained for example by friction or by engagement of a protrusion or a tooth in a slot.
  • the tool or key is a hollow cylinder comprising two teeth diametrically and inward located, able to engage corresponding diametrically located slots on the connector, at its base.
  • the present invention aims to provide a solution preventing the drawbacks of prior art.
  • the invention aims at proposing a terminator locking device associated with a tool having easier access to the device.
  • the invention is dedicated to make that a bulky device which obstruction by objects in the neighbourhood prevents any rotation of the connector.
  • the invention is intended to prevent facilitating device removal by injection of strong glue.
  • the invention aims also at providing a vertical access for the associated tool as well as at preventing the use of blocking screws which are visible or can be lost.
  • the invention aims also at providing an associated tool which is simple, not bulky and cheap.
  • the present invention is related to a safety coaxial termination or connection device, comprising :
  • the locking member has the form of a horseshoe, capable to move longitudinally in the chamber.
  • the ratio of the longest dimension of the safety member and the orifice diameter is greater than 3.
  • the ratio of the longest dimension and the thickness of the safety member is greater than 10.
  • the safety member is oval, said orifice being provided at a round periphery of the safety member.
  • an impedance charge is secured within the connector.
  • the connector is a F-type male charge and the safety termination device is effective as a filter or an attenuator, the second end of the connector being provided with threads to fit a coaxial drop line.
  • the connector and the safety member are composed of metal, preferably brass or stainless steel.
  • the invention is particularly intended to be used as a safety filter or terminator for equipping couplers or multi-taps in the field of CATV.
  • FIG. 1A and 1B represent perspective views (exploded view in FIG.1B) of the terminator locking device pertaining to the present invention.
  • FIG. 2A to 2C represent respectively an upper plan view and cross-sectional views of the device depicted in FIG. 1A and 1B.
  • FIG.3 represents a lower plan view corresponding to the upper plan view of FIG.2A.
  • FIG.4 represents a perspective view of the safety member disposed on the connector, as well as the corresponding opening tool, according to a preferred embodiment of the present invention.
  • the device according to the invention is horizontally extended, not vertically extended.
  • the property to exploit is that an essentially horizontal, relatively flat extension would render the system, when locked, extremely bulky, owing to the fact that, most of the time, there are several output ports on a same coupler.
  • the principle carried out by the invention is to prevent unscrewing of the connector, the bulky locking device attached to the latter co-operating with the other ports for making obstruction to unscrewing.
  • the locking device 1 has an oval form and is made of two parts 2, 3 which fit together by means of tenons, thus making a void inside (see FIG.2B and FIG.2C).
  • a bore 4 is provided at one end of the oval in order to match the connector (see FIG.3).
  • Matching with the locking device of the invention requires the use of specially machined cylindrical connectors 5, presenting two truncation parallel planes 5', 5".
  • the system is provided with a part 6 having the form of a horseshoe, which is normally pushed by a compression spring 7 into the voids left by the truncated connector in the round bore 4.
  • an opening 8 is provided in one of the caps 2, 3 to introduce a tool or a key 9 vertically, provided with a stem having a transverse protrusion 10, and which is able to push back the part 6 against spring 7 and free the locking device 1 from the connector (see FIG.4).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP05447248A 2005-11-09 2005-11-09 Dispositif de verrouillage pour résistance de terminaison Withdrawn EP1793456A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05447248A EP1793456A1 (fr) 2005-11-09 2005-11-09 Dispositif de verrouillage pour résistance de terminaison

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05447248A EP1793456A1 (fr) 2005-11-09 2005-11-09 Dispositif de verrouillage pour résistance de terminaison

Publications (1)

Publication Number Publication Date
EP1793456A1 true EP1793456A1 (fr) 2007-06-06

Family

ID=36096179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05447248A Withdrawn EP1793456A1 (fr) 2005-11-09 2005-11-09 Dispositif de verrouillage pour résistance de terminaison

Country Status (1)

Country Link
EP (1) EP1793456A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845454A (en) * 1972-10-20 1974-10-29 Gilbert Engineering Co Tamper-resistant cable terminator
US4862716A (en) * 1988-10-11 1989-09-05 Derman Jay S Stud not locking device for spare tires
US5106312A (en) * 1991-06-27 1992-04-21 Yeh Ming H Coaxial cable output terminal safety plug device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845454A (en) * 1972-10-20 1974-10-29 Gilbert Engineering Co Tamper-resistant cable terminator
US4862716A (en) * 1988-10-11 1989-09-05 Derman Jay S Stud not locking device for spare tires
US5106312A (en) * 1991-06-27 1992-04-21 Yeh Ming H Coaxial cable output terminal safety plug device

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