GB2108331A - Flameproof electric couplers - Google Patents
Flameproof electric couplers Download PDFInfo
- Publication number
- GB2108331A GB2108331A GB08228392A GB8228392A GB2108331A GB 2108331 A GB2108331 A GB 2108331A GB 08228392 A GB08228392 A GB 08228392A GB 8228392 A GB8228392 A GB 8228392A GB 2108331 A GB2108331 A GB 2108331A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- flameproof
- path
- shoulder
- support member
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 11
- 210000002832 shoulder Anatomy 0.000 claims description 40
- 230000004323 axial length Effects 0.000 claims description 6
- 241000353097 Molva molva Species 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000002360 explosive Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims description 2
- 238000005065 mining Methods 0.000 claims description 2
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
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/527—Flameproof cases
Landscapes
- Connector Housings Or Holding Contact Members (AREA)
Abstract
A flameproof electric coupler includes at least one metal contact 1 fixed in a bore in a support member having two shoulders 4 each facing towards a respective end. One shoulder is engaged by a shoulder 3 on the contact and the other shoulder is engaged by a separate annular member 5 which is secured against axial movement with respect to the contact. This separate annular member 5 forms a flameproof leakage path with both the contact and tie support member. A substantial saving in overall length can be achieved. <IMAGE>
Description
^ IFICATION Flameproof electric couplers
This invention relates to electric couplers of the
"flameproof" type for use in mines, oil refineries and
other environments where explosive atmospheres
may be encountered for connecting cables to one
another or to electrical equipment.
In such couplers it is frequently necessary to fix a
metal contact (with or without an insulating cover
ing) in a bore in an insuiator or other support
member in such a manner that the creepage path
through the bore meets the standards for flameproof
connection. This normally means that the creepage
path must be formed by a screw thread having a
minimum of five full threads or an axial length of
least 8 mm, or if unthreaded must have a leng; least 12.5 and often longer to ensure 'hat ct cent. ic- ity requirements are satisfied.As it is us, a;ly preferable for the contact to be fixed to a cable
conductor before being fled in thr. support mem
ber, a threaded connection is usually ruled out, and the alternative of a path length of 12.5 mm or higher
may significantly increase the overall length and the
material cost of the complete coupling.
In accordance with the invention, a flameproof electric coupler includes at least one metal contact fixed in a bore in a support member having a shoulder facing towards each of its ends, one of those shoulders (usually the one facing towards the
cable, when applicable) being engaged by a shoul
der on the contact and the other being engaged by a
separate annular member secured against axial
movement with respect to the contact and forming a flameproof leakage path with both the contact and the support member.
Preferably the flameproof path between the separate annular member and the contact is formed by a screw thread with either five cr more full threads or an axial length of 8 mm or more, and the flameproof path between the separate annular member and the support member by an unthreaded path at least 12.5 mm long. With this arrangement an overall length of at least 12.5 mm is required for the provision of the flameproof connection, bust a substantial part of that length can overlap with the function part of the contact (which is not possible when the flameproof path is formed directly between the contact and the support member).
In the accompanying drawings, Figure 1 shows a mounting suitable for a socket contact of a 3.3 kV 300A mining coupler in accordance with the invention, and Figure 2 shows for comparison ail equivalent conventional design. In each case the mating pin coupler enters from the right, and the cable is connected to the left as seen in the drawing.
In each case the contact 1 engages a shoulder 2 on the support member that faces to the left through a shoulder 3, and a shoulder 4 on the support member is used to fix the contact 1 in position. In the design according to the invention, the shoulder 4 is engaged by the separate annular member 5 with a flameproof path often full screw threads with the contact and a flameproof path of 12.5 mm or longer with the support member. in the conventional design, the shoulder 4 is engaged by a simple nut 6 threaded on the contact, which serves no junction except to secure the contact in position, and the whole of the flameproof path length has to be provided between the shoulders 2 and 4.
In this particular design, a length saving of about 118 mm results.
1. A flameproof electric coupler including at least one metal contact fixed n a bore in a support member having a shoulder facing towards each of its ends, one of those shoulders being engaged by a shoulder en the contact and the other being engaged by a separate annular member secured against axial movement with respect to the contact and forming a flameproof leakage path via both the contact and the support member.
2. A flameproof electric coupler including at least one metal contact fixed in a bore in a support member having a shoulder facing towards each of its ends, the shoulder facing towards the cable being engaged by a shoulder on the contact and the other shoulder being engaged by a seperate annular member secured against axial movement with respect to the contact and forming a flameproof leakage path with both the contact and the support member.
3. A flameproof electric coupler including at least one metal contact fixed in a bore in a support member having a shoulder facing towards each of its ends, the shoulder facing towards the cable being engaged by a shoulder on the contact and the other shoulder being engaged by a separate annular member secured against axial movement with respect to the contact and forming a first flameproof path with the contact and a second flameproof path with the support member, the first flameproof path being formed by a screw thread with either five or more full threads or an axial length of 8 mm or more, and the second flameproof path being formed by an unthreaded path at least 12.5 mm long.
4. A flameproof electric coupler substantially as described with reference to Figure 1 of the drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (4)
1. A flameproof electric coupler including at least one metal contact fixed n a bore in a support member having a shoulder facing towards each of its ends, one of those shoulders being engaged by a shoulder en the contact and the other being engaged by a separate annular member secured against axial movement with respect to the contact and forming a flameproof leakage path via both the contact and the support member.
2. A flameproof electric coupler including at least one metal contact fixed in a bore in a support member having a shoulder facing towards each of its ends, the shoulder facing towards the cable being engaged by a shoulder on the contact and the other shoulder being engaged by a seperate annular member secured against axial movement with respect to the contact and forming a flameproof leakage path with both the contact and the support member.
3. A flameproof electric coupler including at least one metal contact fixed in a bore in a support member having a shoulder facing towards each of its ends, the shoulder facing towards the cable being engaged by a shoulder on the contact and the other shoulder being engaged by a separate annular member secured against axial movement with respect to the contact and forming a first flameproof path with the contact and a second flameproof path with the support member, the first flameproof path being formed by a screw thread with either five or more full threads or an axial length of 8 mm or more, and the second flameproof path being formed by an unthreaded path at least 12.5 mm long.
4. A flameproof electric coupler substantially as described with reference to Figure 1 of the drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08228392A GB2108331B (en) | 1981-10-05 | 1982-10-05 | Flameproof electric couplers |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8130022 | 1981-10-05 | ||
| GB08228392A GB2108331B (en) | 1981-10-05 | 1982-10-05 | Flameproof electric couplers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2108331A true GB2108331A (en) | 1983-05-11 |
| GB2108331B GB2108331B (en) | 1984-10-10 |
Family
ID=26280897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08228392A Expired GB2108331B (en) | 1981-10-05 | 1982-10-05 | Flameproof electric couplers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2108331B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2219146A (en) * | 1988-04-13 | 1989-11-29 | Cmp | Improvements in explosion-proof cable glands |
| EP0433003A1 (en) * | 1989-12-11 | 1991-06-19 | C M P (UK) Limited | Interface assembly for bulkheads in explosive environments |
| WO2014011422A1 (en) * | 2012-07-13 | 2014-01-16 | Robert Bosch Gmbh | Modular electrical connector and connection method |
| WO2016172176A1 (en) * | 2015-04-20 | 2016-10-27 | Tyco Electronics Corporation | Mining cable coupler connectors and related assemblies and methods |
-
1982
- 1982-10-05 GB GB08228392A patent/GB2108331B/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2219146A (en) * | 1988-04-13 | 1989-11-29 | Cmp | Improvements in explosion-proof cable glands |
| GB2219146B (en) * | 1988-04-13 | 1992-10-28 | Cmp | Improvements in cable glands |
| EP0433003A1 (en) * | 1989-12-11 | 1991-06-19 | C M P (UK) Limited | Interface assembly for bulkheads in explosive environments |
| WO2014011422A1 (en) * | 2012-07-13 | 2014-01-16 | Robert Bosch Gmbh | Modular electrical connector and connection method |
| US9112295B2 (en) | 2012-07-13 | 2015-08-18 | Robert Bosch Gmbh | Modular electrical connector and connection method |
| WO2016172176A1 (en) * | 2015-04-20 | 2016-10-27 | Tyco Electronics Corporation | Mining cable coupler connectors and related assemblies and methods |
| US9793621B2 (en) | 2015-04-20 | 2017-10-17 | Te Connectivity Corporation | Mining cable coupler connectors and related assemblies and methods |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2108331B (en) | 1984-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4067636A (en) | Electrical separable connector with stress-graded interface | |
| US3960433A (en) | Shielded power cable separable connector module having conducting contact rod with a beveled shoulder overlapped by insulating follower material | |
| US3800064A (en) | Universal power cable joint with closed-cell sponge stress relief element | |
| GB1190357A (en) | Coupling Locking Device | |
| US5908332A (en) | Cable termination | |
| US4767351A (en) | High voltage externally-separable bushing | |
| US3401370A (en) | Separable connector for underground system | |
| US7588469B2 (en) | Safely separating electrical connecting system | |
| US4427256A (en) | High voltage cable/connector assembly | |
| GB2108331A (en) | Flameproof electric couplers | |
| US2247386A (en) | Cable connector | |
| US5112252A (en) | Intrinsically safe electrical connector | |
| US3522578A (en) | Cable conforming connector sleeve | |
| CA1184986A (en) | Flameproof electric couplers | |
| US5435740A (en) | Locking sleeve connector for conductor cable | |
| GB461239A (en) | Improvements in or relating to end fittings or joint fittings for electric cables having compressed mineral powder insulation | |
| DK489484D0 (en) | ASSEMBLY FOR ISOLATED ELECTRICAL CABLES | |
| US2494666A (en) | Ignition shield disconnect | |
| US4059329A (en) | Double bushing well with cantilever load supporting legs | |
| JP3181504B2 (en) | Power cable connection | |
| US3173988A (en) | Terminal connection for terminal bushing | |
| US2760172A (en) | Electrical connectors | |
| US2524539A (en) | Insulating bushing with flexible sheath mounting | |
| GB2123222A (en) | Cable glands | |
| US2462227A (en) | Connector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19921005 |