GB689513A - Thermo-magnetic overload circuit-breaker - Google Patents
Thermo-magnetic overload circuit-breakerInfo
- Publication number
- GB689513A GB689513A GB29142/50A GB2914250A GB689513A GB 689513 A GB689513 A GB 689513A GB 29142/50 A GB29142/50 A GB 29142/50A GB 2914250 A GB2914250 A GB 2914250A GB 689513 A GB689513 A GB 689513A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- arms
- coil
- contacts
- magnetic
- 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
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
- H01H71/142—Electrothermal mechanisms actuated due to change of magnetic permeability
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
- H01H73/44—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by push-button, pull-knob or slide
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
- Breakers (AREA)
Abstract
689,513. Automatic circuit-breakers. HEIDENWOLF, H., and NAIMER, H. Nov. 28, 1950 [Nov. 28, 1949], No. 29142/50. Class 38 (v) Excessive current in a coil 19 heats and so varies the permeability of a magnetic member 11 that a permanent magnet 16, the poles 17 of which have been engaging the member 11, is released and under the bias of a spring 14 moves into the position shown. A circuit between contacts 5, 6 and which includes the coil 19 and two spring contacts 8 normally bridged by the magnet is thereby broken. An exceptionally high current either D.C. or A.C. through the coil 19 will also release the magnet instantaneously by acting in opposition to the magnet and release may also be assisted by making the contact arms 8 of bimetal so that when heated they press upwards against the magnet with increasing strength. The device is reset by pressing down a button 26 which carries with it two arms 28 bearing on a collar 15 on the rod 13 carrying the magnet. This brings the magnet sufficiently near to the member 11 for the movement to be completed by magnetic attraction, unless the overload persists. The button 26 cannot by itself push the magnet into engagement since after a certain movement the arms 28 encounter a bar 31 and are forced apart. In a modification, Fig. 5, the permanent magnet 40 is fixed but two movable magnetic arms 41, 42, engage the ends of the heated member 43 and the contacts 44. Specification 229,564,[Class 38(v)], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT288006X | 1949-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB689513A true GB689513A (en) | 1953-04-01 |
Family
ID=3670880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29142/50A Expired GB689513A (en) | 1949-11-28 | 1950-11-28 | Thermo-magnetic overload circuit-breaker |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE499632A (en) |
| CH (1) | CH288006A (en) |
| DE (1) | DE882585C (en) |
| FR (1) | FR1028534A (en) |
| GB (1) | GB689513A (en) |
| NL (1) | NL157526C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2141587A (en) * | 1983-06-13 | 1984-12-19 | Technology Res Corp | Resettable circuit closing device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1121188B (en) * | 1959-06-20 | 1962-01-04 | Sursum Elek Zitaets Ges Leyhau | Device for protection against electrical overcurrents |
| DE1216410B (en) * | 1962-12-11 | 1966-05-12 | Continental Elektro Ind Ag | Switch with thermomagnetic release |
| US4550298A (en) * | 1984-01-23 | 1985-10-29 | Rte Corporation | Trip assembly for a circuit breaker |
| DE102008051939A1 (en) | 2008-10-16 | 2010-04-22 | Siemens Aktiengesellschaft | Release mechanism for electrical installation apparatus i.e. line circuit breaker, has ferromagnetic body holding armature in predetermined position, where current flows through body when current of intensity flows through current coil |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2255638A (en) * | 1940-01-24 | 1941-09-09 | Westinghouse Electric & Mfg Co | Overload relay |
-
0
- NL NL157526D patent/NL157526C/xx active
- BE BE499632D patent/BE499632A/xx unknown
-
1950
- 1950-11-24 CH CH288006D patent/CH288006A/en unknown
- 1950-11-28 DE DEH6800A patent/DE882585C/en not_active Expired
- 1950-11-28 GB GB29142/50A patent/GB689513A/en not_active Expired
- 1950-11-28 FR FR1028534D patent/FR1028534A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2141587A (en) * | 1983-06-13 | 1984-12-19 | Technology Res Corp | Resettable circuit closing device |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1028534A (en) | 1953-05-26 |
| CH288006A (en) | 1952-12-31 |
| BE499632A (en) | |
| NL157526C (en) | |
| DE882585C (en) | 1953-07-09 |
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