GB1383578A - Line protection for electric circuits - Google Patents
Line protection for electric circuitsInfo
- Publication number
- GB1383578A GB1383578A GB4587872A GB4587872A GB1383578A GB 1383578 A GB1383578 A GB 1383578A GB 4587872 A GB4587872 A GB 4587872A GB 4587872 A GB4587872 A GB 4587872A GB 1383578 A GB1383578 A GB 1383578A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- circuit
- earthing
- strip
- melt
- 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.)
- Expired
Links
- 229910000679 solder Inorganic materials 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 abstract 2
- 239000008188 pellet Substances 0.000 abstract 2
- 230000002035 prolonged effect Effects 0.000 abstract 2
- 230000001012 protector Effects 0.000 abstract 2
- 101100188555 Arabidopsis thaliana OCT6 gene Proteins 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/20—Electrothermal mechanisms with fusible mass
- H01H71/205—Electrothermal mechanisms with fusible mass using a ratchet wheel kept against rotation by solder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T1/00—Details of spark gaps
- H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
Landscapes
- Fuses (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
1383578 Protective arrangements RELIABLE ELECTRIC CO 5 Oct 1972 [6 Oct 1971] 45878/72 Heading H2K [Also in Division H1] A line protector, e.g. for telecommunication equipment, comprises a line circuit with interconnected line terminals 25, 29, a further circuit extending from the line circuit to an earthing terminal (not shown), the further circuit comprising an earthing strip 45, an insulating strip 52 normally interrupting the further circuit, and over-voltage responsive means effective for melting the strip to close the further circuit to earth the line. The over-voltage means is a module having a conducting plug 62a biased by a spring 84 towards a conducting cup 64a, but normally restrained by a solder pellet 76a, and a spark gap assembly having carbon electrodes 68a, 70a. Over-voltage transients on the line merely cause arcing at the spark gap, but under prolonged overvoltage conditions, the continuing arcing causes the pellet 76a to melt and enable the spring 84 to move the plug 62a into contact with the cup 64a to complete the earthing circuit. In the event of prolonged overvoltage of relatively low magnitude such that the solder does not melt, the heating of the carbon electrode 70a causes the strip 52 to melt so that the earthing strip 45 is brought directly into contact with the line circuit. The line circuit may include fixed spring blades 86, 87 co-operating with a moving printed circuit board 90 having contact areas 88, 95 interconnected by the heating coil 97 of a thermal latch device. This device comprises a fixed pawl 200 co-operating with a ratchet wheel 192 on a spindle soldered to a sleeve 180 in the board 90. In the event of overcurrent, the solder melts and the wheel turns to release the board to open the line, to earth it and to complete an alarm circuit. A single housing may enclose two such protectors, common earthing and alarm terminals being provided.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18701871A | 1971-10-06 | 1971-10-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1383578A true GB1383578A (en) | 1974-02-12 |
Family
ID=22687278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4587872A Expired GB1383578A (en) | 1971-10-06 | 1972-10-05 | Line protection for electric circuits |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US3794947A (en) |
| JP (1) | JPS569861B2 (en) |
| AR (1) | AR193900A1 (en) |
| AU (1) | AU467786B2 (en) |
| BR (1) | BR7206928D0 (en) |
| CA (1) | CA952579A (en) |
| DE (1) | DE2248047C2 (en) |
| FR (1) | FR2156094B1 (en) |
| GB (1) | GB1383578A (en) |
| IT (1) | IT966211B (en) |
| SE (1) | SE388715B (en) |
| ZA (1) | ZA727157B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3743888A (en) * | 1972-08-24 | 1973-07-03 | Reliable Electric Co | Line protector for a communication circuit |
| JPS5252636U (en) * | 1975-10-15 | 1977-04-15 | ||
| JPS5741894Y2 (en) * | 1977-09-29 | 1982-09-14 | ||
| JPS5693240A (en) * | 1979-12-27 | 1981-07-28 | Nippon Electric Co | Line protector |
| JPS642510Y2 (en) * | 1981-02-04 | 1989-01-20 | ||
| DE3430922A1 (en) * | 1984-08-22 | 1986-03-06 | Krone Gmbh, 1000 Berlin | Voltage surge arrester and current protection magazine for LSA-Plus (substation control and protection system - plus) isolating strips, for telecommunications technology, which are fitted with connecting contacts which are free of solder, screws and insulation-stripping and have a polytropic airgap, that is to say, LSA-Plus contacts |
| US4876626A (en) * | 1988-06-03 | 1989-10-24 | Reliance Comm/Tec Corporation | Central office protector module with alarm indicator |
| US4862314A (en) * | 1988-06-03 | 1989-08-29 | Reliance Comm/Tec Corporation | System for providing power to a central office protector module with alarm indicator and including remote alarm indication |
| US4901188A (en) * | 1988-12-30 | 1990-02-13 | Reliance Comm/Tec Corporation | Line protector with spring |
| DE4026004A1 (en) * | 1990-08-14 | 1992-02-20 | Krone Ag | PROTECTIVE CIRCUIT AND PROTECTIVE PLUG IN TELECOMMUNICATION SYSTEMS |
| US5195015A (en) * | 1991-03-07 | 1993-03-16 | Reliance Comm/Tec Corporation | Line protector for a communications circuit |
| US5751533A (en) * | 1996-02-01 | 1998-05-12 | Reltec Corporation | Cup and diode assembly for overvoltage protectors and communications lines |
| US5910877A (en) * | 1997-11-17 | 1999-06-08 | Reltec Corporation | Line protector for a communication circuit |
| US20070174700A1 (en) * | 2006-01-25 | 2007-07-26 | Honeywell International Inc. | Connector ports for anti-tamper |
| US20140118102A1 (en) * | 2012-10-29 | 2014-05-01 | Sean Iwasaki | Telecommunication surge protector system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US845010A (en) * | 1902-04-21 | 1907-02-19 | Rolfe Electric Company | Electrical protective apparatus. |
| US1457249A (en) * | 1921-07-12 | 1923-05-29 | Western Union Telegraph Co | Electrical protector |
| US1726807A (en) * | 1924-05-01 | 1929-09-03 | Reliable Electric Co | Discharge block |
| US2179935A (en) * | 1937-05-28 | 1939-11-14 | Philip J Kayatt | High potential cut-out |
| US2219705A (en) * | 1939-01-11 | 1940-10-29 | Jno E Leake | Fuse |
| US3255330A (en) * | 1962-08-30 | 1966-06-07 | Cook Electric Co | Line protector |
| US3587021A (en) * | 1969-07-22 | 1971-06-22 | Reliable Electric Co | Line protector for a communications circuit |
-
1971
- 1971-10-06 US US00187018A patent/US3794947A/en not_active Expired - Lifetime
-
1972
- 1972-09-07 CA CA151,187A patent/CA952579A/en not_active Expired
- 1972-09-30 DE DE2248047A patent/DE2248047C2/en not_active Expired
- 1972-10-05 BR BR6928/72A patent/BR7206928D0/en unknown
- 1972-10-05 FR FR7235384A patent/FR2156094B1/fr not_active Expired
- 1972-10-05 AR AR244485A patent/AR193900A1/en active
- 1972-10-05 GB GB4587872A patent/GB1383578A/en not_active Expired
- 1972-10-05 IT IT53199/72A patent/IT966211B/en active
- 1972-10-05 SE SE7212855A patent/SE388715B/en unknown
- 1972-10-05 AU AU47466/72A patent/AU467786B2/en not_active Expired
- 1972-10-06 ZA ZA727157A patent/ZA727157B/en unknown
- 1972-10-06 JP JP9995672A patent/JPS569861B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4844743A (en) | 1973-06-27 |
| FR2156094A1 (en) | 1973-05-25 |
| SE388715B (en) | 1976-10-11 |
| US3794947A (en) | 1974-02-26 |
| BR7206928D0 (en) | 1973-09-13 |
| DE2248047A1 (en) | 1973-04-12 |
| DE2248047C2 (en) | 1985-05-02 |
| JPS569861B2 (en) | 1981-03-04 |
| AR193900A1 (en) | 1973-05-31 |
| AU4746672A (en) | 1974-04-11 |
| CA952579A (en) | 1974-08-06 |
| AU467786B2 (en) | 1975-12-11 |
| IT966211B (en) | 1974-02-11 |
| FR2156094B1 (en) | 1978-03-03 |
| ZA727157B (en) | 1973-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4477857A (en) | Printed circuit fuse | |
| US4191985A (en) | Interrupter | |
| GB1383578A (en) | Line protection for electric circuits | |
| EP0017337B1 (en) | Line protector for a communications circuit | |
| GB1458738A (en) | Line protectors for communications circuits | |
| GB1487059A (en) | Line protectors for communication circuit | |
| GB1276801A (en) | Line protector for a communications circuit | |
| US4086648A (en) | Protector module | |
| US3743888A (en) | Line protector for a communication circuit | |
| US3818271A (en) | Line connector for a communications circuit | |
| SE8106947L (en) | DEVICE FOR OVERHEATING AND OVERVOLTAGE IN A VOLTAGE LIMIT CIRCUIT | |
| GB1486448A (en) | Low voltage protection network | |
| US4424546A (en) | Miniature central office surge protectors | |
| JP2791979B2 (en) | Protection circuit to protect against overvoltage and overcurrent | |
| US5027100A (en) | Gas tube fail safe device for telephone protector modules | |
| GB1120361A (en) | Over-voltage protection techniques | |
| US4188561A (en) | Station protector spark gap applique | |
| US4527215A (en) | Valve type voltage arrester device | |
| US5282109A (en) | Back-up air gaps | |
| US4701825A (en) | Line protector | |
| ES463949A1 (en) | Voltage surge protector | |
| US4191987A (en) | Clip-on protector | |
| US4326231A (en) | Clip-on protector | |
| US4506310A (en) | Precision fusing arrangement | |
| WO1986002773A1 (en) | Electrical components incorporating a temperature responsive device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |