Source: https://patents.google.com/patent/EP0105723B1/en
Timestamp: 2020-02-17 21:13:03
Document Index: 167246953

Matched Legal Cases: ['arts 19', 'art 20', 'arts 36', 'art 20', 'art 19', 'art 20', 'arts 44']

EP0105723B1 - A connector for shielded cable - Google Patents
A connector for shielded cable Download PDF
EP0105723B1
EP0105723B1 EP19830305870 EP83305870A EP0105723B1 EP 0105723 B1 EP0105723 B1 EP 0105723B1 EP 19830305870 EP19830305870 EP 19830305870 EP 83305870 A EP83305870 A EP 83305870A EP 0105723 B1 EP0105723 B1 EP 0105723B1
EP19830305870
EP0105723A1 (en
Jessie Lee Moser
1982-10-06 Priority to US06/433,064 priority Critical patent/US4477132A/en
1982-10-06 Priority to US433064 priority
1983-09-29 Application filed by AMP Inc filed Critical AMP Inc
1984-04-18 Publication of EP0105723A1 publication Critical patent/EP0105723A1/en
1985-12-27 Publication of EP0105723B1 publication Critical patent/EP0105723B1/en
The invention relates to an electrical connector for a shielded flat cable known as twin axial cable.
The increasing demand for flat cable, for example for undercarpet wiring applications, has resulted in the development of a flat cable known as twin axial cable to supersede twisted pair coaxial cable.
There is a requirement for a connector which will not only quickly and effectively terminate the twin axial cable, but which will also mate with existing conventional connectors for twisted pair coaxial cable. In addition, it is clearly desirable that a minimum amount of retooling is necessary to minimize capital investment.
A known electrical connector comprises a metal sleeve having spring contact fingers extending from a forward mating end, a locking cap rotatably mounted on the sleeve to extend from the mating end surrounding the spring contact fingers, a generally cylindrical insulating, terminal-locating body receivable as a close fit within the sleeve to locate terminals projecting from the mating end within and isolated from the spring contact fingers and a retention bush attachable to the rear end of the sleeve to retain the terminal-locating body in the sleeve.
In the known twisted pair coaxial cable connector, means are also provided to connect the cable shield to the metal sleeve, such means comprising a ferrule and a metal annulus receivable over the ferrule to clamp the cable shield between them, a resilient washer also being necessary to locate the shield connecting means within the sleeve, clamped between the retention bush and the insulating body.
The large number of parts contribute to costs of manufacture and assembly. Further, prior attempts to locate twin axial cable in the sleeve have included potting to provide necessary strain relief. However, this potting step is very laborious and time-consuming in the field and results in a permanent connection preventing disassembly and reuse of components in the event of a faulty connection.
According to the invention, for terminating flat shielded cable having a drain wire, the terminal-locating body is bipartite, each part being generally hemicylindrical and being formed with terminal-receiving recesses at a mating end communicating with a cable-receiving recess at a rear end across which extends a cable-clamping means a drain wird-receiving passageway extending radially through the body in communication with the cable-receiving recesses.
Assembly of the cable in the connector, after termination of the conductors to the terminals (e. g., by soldering), is easily achieved by threading the terminals and prepared end of the cable through the retention bush and locating the terminals and prepared end in one body part with the drain wires extending through the radial passageway to the exterior of the body and the cable extending across the rib. The other body part is then assembled to the one body part and the subassembly of the insulating body part and terminated cable inserted into the rear of the sleeve. The retention bush is then attached to the rear end of the sleeve.
During the insertion, the drain wires are wedged between the outer surface of the insulating body and the interior surface of the sleeve providing the necessary shield connection while the cable is clamped between the opposed ribs providing the necessary strain relief.
The connector is relatively simple avoiding a requirement for the additional shield connecting means of the prior connector, is easily assembled, and provides effective strain relief without a requirement for potting, enabling rapid disassembly if necessary.
The only new component required is the bipartite locating body. The sleeve, locking cap and retention bush of the connector assembly designed for the twisted pair coaxial cable may all be used for the twin axial connector, minimizing retooling investment.
Figure 1 is an axial cross-sectional view of the connector terminating a twin axial flat cable;
Figure 2 is a partly exploded perspective view of the connector with terminal-locating body parts aligned for assembly;
Figure 3 is a partly exploded perspective view with the terminal-locating body parts assembled together; and,
Figure 4 is a perspective view of modified body parts.
As shown in Figures 1 through 3, the connector comprises a generally cylindrical metal sleeve 11 from a forward, mating end of which extends a ring of contact spring fingers 12. A central portion 13 of the sleeve 11 is waisted providing a rearwardly facing shoulder 14 retaining a conventional, internally threaded, locking cap 15 rotatably mounted on the central portion 13, surrounding and spaced from the contact spring fingers. A rear end of the sleeve 11 is internally threaded for receipt of a threaded metal retention bush 17. A key 18 extends inwardly of the central portion 13. Rearwardly facing locating shoulders 24 and 25 define a stepped internal configuration.
A terminal-locating body and cable clamp comprises first and second similar parts 19 and 20 each molded from plastics material into a generally cylindrical shape. A keyway 21 extends axially from a front end of one part 20, but the parts are otherwise identical. The parts are of axially stepped configuration, the steps being defined by forwardly-facing, locating shoulders 22 and 23. Each body is formed with terminal-receiving recesses 26 which communicate via conductor- receiving recesses 27 with a cable receiving recess 28 for a twin axial cable 38 at a rear of the locating body across which recess extends a claimping rib 29. Locating posts 30, 31 upstand from opposite sides of the body parts for receipt in locating sockets 33, 32, respectively. Two drain wire-receiving bores 34, 34' extend radially through respective body parts in axially spaced apart relation.
The twin axial cable 38 is prepared for termination by exposing the conductors 40 and associated drain wires 41 and trimming excess insulation from the end to be terminated. The individual conductors are then connected to socket parts 36 of terminals 35 by soldering or other suitable means and the cable end threaded through the retention bush 17. The drain wires 41 are then carefully threaded into the bores 34 to protrude from the exterior of one body part 20, for example, and the terminals and cable located in the recesses 26 and 28, respectively, with pin portions 37 of the terminals projecting from the mating end. The other body part 19 is then assembled with body part 20 and located by the posts being received in the socket. The subassembly is then in the condition shown in Figure 3 and can be inserted axially into the rear of the sleeve 11 and retained with the shoulders 22 and 24, and 23 and 25 in abutment by the retention bush 17, as shown in Figure 1.
During insertion into the sleeve, the free ends of the drain wires are wedged between the exterior of the body and the interior of the sleeve 11 effecting electrical connection between the cable shields and the sleeve.
In modified body parts 44 and 45 shown in Figure 4, recesses 46 are provided in each stepped part in the interests of economy of molding material and to provide a more uniform dielectric thickness surrounding the signal conductor improving the transmission characteristics at the connection.
1. An electrical connector for shielded cable (38) comprising a metal sleeve (11) having spring contact fingers (12) extending from a forward mating end, a locking cap (15) rotatably mounted on the sleeve (11) to extend from the mating end surrounding the spring contact fingers (12), a generally cylindrical, insulating, terminal-locating block (19, 20) receivable as a close fit within the sleeve (11) to locate terminals (35) projecting from the mating end within and isolated from the spring contact fingers (12) and a retention bush (15) attachable to the rear end of the sleeve (11), to retain the terminal-locating block (19, 20) in the sleeve (11), characterised in that, for terminating flat shielded cable (38) having a drain wire (34), the body (19, 20) is bipartite, each part (19 or 20) being generally hemicylindrical and being formed with terminal-receiving recesses (26) at a mating end communicating with a cable-receiving recess (28) at a rear end across which extends a cable-clamping means (24), a drain wire-receiving passageway (34 or 34') extending generally radially through the body (19, 20) and in communication with the cable-receiving recesses (26).
2. An electrical connector according to claim 1 characterised in that, means (30, 31, 33, 32) are provided on the body parts (19 and 20) to locate the parts (19 and 20) together.
3. An electrical connector according to claim 1 or claim 2 characterised in that a second radially- extending drain wire-receiving passageway (34 or 34') is formed in a body part (19 or 20) axially spaced from the said passageway (34' or 34).
4. An electrical connector according to claim 1 characterised in that, each body part (19 or 20) increases in radial dimension as it extends rearwardly, position of the part (19 or 20) being formed with recesses (46) to provide a generally uniform dielectric thickness throughout its length.
EP19830305870 1982-10-06 1983-09-29 A connector for shielded cable Expired EP0105723B1 (en)
US06/433,064 US4477132A (en) 1982-10-06 1982-10-06 Connector for twin axial cable
US433064 1982-10-06
EP0105723A1 EP0105723A1 (en) 1984-04-18
EP0105723B1 true EP0105723B1 (en) 1985-12-27
ID=23718712
EP19830305870 Expired EP0105723B1 (en) 1982-10-06 1983-09-29 A connector for shielded cable
US (1) US4477132A (en)
EP (1) EP0105723B1 (en)
JP (1) JPS5983373A (en)
DE (1) DE3361645D1 (en)
MX (1) MX153920A (en)
DE3604178A1 (en) * 1985-02-09 1986-08-14 Tokico Ltd Tandem brake master cylinder
DE8718055U1 (en) * 1987-06-27 1993-03-04 Westfalia Becorit Industrietechnik Gmbh, 4670 Luenen, De
GB2262396A (en) * 1991-12-14 1993-06-16 B & H Ltd Connector for elongate objects
DE19808878B4 (en) * 1998-03-03 2004-09-30 Ifm Electronic Gmbh Measuring device for process measurement technology
US1060822A (en) * 1911-01-18 1913-05-06 Archibald Thorpe Crosher Method of connecting electric wires to lamp-holders, plugs, and the like.
GB914326A (en) * 1958-04-16 1963-01-02 Painton & Co Ltd Improvements in or relating to coaxial electric plug and socket connectors
US3441658A (en) * 1966-04-29 1969-04-29 Amp Inc Ceramic insulator in cable connections
JPS4728633U (en) * 1971-04-26 1972-12-01
JPS6210951Y2 (en) * 1978-10-23 1987-03-14
1982-10-06 US US06/433,064 patent/US4477132A/en not_active Expired - Fee Related
1983-09-29 DE DE19833361645 patent/DE3361645D1/en not_active Expired
1983-09-29 EP EP19830305870 patent/EP0105723B1/en not_active Expired
1983-09-29 JP JP17948283A patent/JPS5983373A/en active Pending
1983-09-30 MX MX19897083A patent/MX153920A/en unknown
MX153920A (en) 1987-02-19
DE3361645D1 (en) 1986-02-06
US4477132A (en) 1984-10-16
JPS5983373A (en) 1984-05-14
EP0105723A1 (en) 1984-04-18
1985-08-27 ITF It: translation for a ep patent filed
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