GB674520A - Improvements in or relating to electric circuit breakers embodying overload trip devices - Google Patents
Improvements in or relating to electric circuit breakers embodying overload trip devicesInfo
- Publication number
- GB674520A GB674520A GB25580/50A GB2558050A GB674520A GB 674520 A GB674520 A GB 674520A GB 25580/50 A GB25580/50 A GB 25580/50A GB 2558050 A GB2558050 A GB 2558050A GB 674520 A GB674520 A GB 674520A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bimetal
- tripping
- circuit breakers
- relating
- armature
- 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
- H01H71/40—Combined electrothermal and electromagnetic mechanisms
- H01H71/405—Combined electrothermal and electromagnetic mechanisms in which a bimetal forms the inductor for the electromagnetic mechanism
-
- 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
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
- H01H71/7427—Adjusting only the electrothermal mechanism
Abstract
674,520. Automatic circuit breakers. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Oct. 20, 1950. [Dec, 10, 1949] No. 25580/50. Class 38 (v). A thermally or magnetically trippable switch has a movable contact 23 controlled by a dead-centre spring toggle which may be manually operated and is normally held by a spring-pressed latch 73, which is itself held in latching position by a part 93 of a trip bar 87, as in Specification 611,817, the bar being moved to trip the switch by a resilient member 107 anchored at 102 to the base with a bimetal member 101. parallel thereto. On a persistent overload up to e.g. 1,000 per cent load current, the bimetal deflects to the left and an adjustable screw 105 thereon engages the turned-back end 109 of member 107 to cause tripping. The bimetal member 101 carries a magnet yoke 113 and the member 107 an armature 115 so that on a severe overload, e.g. over 1,000 per cent load current, the armature is attracted to cause instantaneous tripping without movement of the bimetal. In a modification, Fig. 2, the resilient member 125 carries the latch 131 and is moved to the right for tripping on deflection of bimetal member 117 which engages an adjustable screw 139 on the end of member 125.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US132342A US2588497A (en) | 1949-12-10 | 1949-12-10 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB674520A true GB674520A (en) | 1952-06-25 |
Family
ID=22453576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25580/50A Expired GB674520A (en) | 1949-12-10 | 1950-10-20 | Improvements in or relating to electric circuit breakers embodying overload trip devices |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2588497A (en) |
| BE (1) | BE499918A (en) |
| FR (1) | FR1030716A (en) |
| GB (1) | GB674520A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1149803B (en) * | 1961-06-27 | 1963-06-06 | Licentia Gmbh | Circuit breaker with thermal and magnetic overcurrent release |
| GB2227606A (en) * | 1988-12-15 | 1990-08-01 | Chance Co Ab | Latch and trip mechanism |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2673908A (en) * | 1951-12-29 | 1954-03-30 | Ite Circuit Breaker Ltd | Instantaneous trip circuit breaker |
| US2876308A (en) * | 1953-08-19 | 1959-03-03 | Fed Electric Prod Co | Circuit breakers |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2027238A (en) * | 1930-11-26 | 1936-01-07 | Westinghouse Electric & Mfg Co | Circuit breaker |
| DE616133C (en) * | 1932-03-23 | 1935-07-20 | Siemens Schuckertwerke Akt Ges | Electric switch with electromagnetic and electrothermal release and momentary switching on and off by means of a snap spring mechanism |
| US2035743A (en) * | 1934-03-29 | 1936-03-31 | Bulldog Electric Prod Co | Circuit breaker |
| US2184372A (en) * | 1937-01-27 | 1939-12-26 | Gen Electric | Circuit breaker |
| US2328458A (en) * | 1940-11-07 | 1943-08-31 | Square D Co | Circuit breaker |
| US2360684A (en) * | 1941-10-30 | 1944-10-17 | Westinghouse Electric & Mfg Co | Circuit breaker |
| US2416163A (en) * | 1942-10-30 | 1947-02-18 | Westinghouse Electric Corp | Shockproof circuit breaker |
| US2439511A (en) * | 1944-04-10 | 1948-04-13 | Frank Adam Electric Co | Latching or tripping mechanism of circuit breakers |
-
0
- BE BE499918D patent/BE499918A/xx unknown
-
1949
- 1949-12-10 US US132342A patent/US2588497A/en not_active Expired - Lifetime
-
1950
- 1950-10-20 GB GB25580/50A patent/GB674520A/en not_active Expired
- 1950-12-08 FR FR1030716D patent/FR1030716A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1149803B (en) * | 1961-06-27 | 1963-06-06 | Licentia Gmbh | Circuit breaker with thermal and magnetic overcurrent release |
| GB2227606A (en) * | 1988-12-15 | 1990-08-01 | Chance Co Ab | Latch and trip mechanism |
| GB2227606B (en) * | 1988-12-15 | 1992-11-25 | Chance Co Ab | Sensitive latch and trip mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| US2588497A (en) | 1952-03-11 |
| FR1030716A (en) | 1953-06-16 |
| BE499918A (en) |
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