GB804428A - Automatic electric circuit breakers - Google Patents
Automatic electric circuit breakersInfo
- Publication number
- GB804428A GB804428A GB17202/56A GB1720256A GB804428A GB 804428 A GB804428 A GB 804428A GB 17202/56 A GB17202/56 A GB 17202/56A GB 1720256 A GB1720256 A GB 1720256A GB 804428 A GB804428 A GB 804428A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- latch
- metal strip
- breaker
- circuit
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
804,428. Automatic circuit-breakers. FEDERAL PACIFIC ELECTRIC CO. June 4, 1956 [June 17, 1955], No. 17202/56. Class 38 (5). In a circuit-breaker having thermal and magnetic tripping, the air-gap of the electromagnet is substantially constant during deflection of the bi-metal strip. As applied to a circuit-breaker generally similar to that of Specification 737,604, the ends of the bi-metal strip 48 and magnetic core 50 are riveted at 59 to the moving contact arm 28. The latch 54 is pivoted at 52 on the bi-metal strip 48 and is held against the end of the strip by the spring 56, the folded end forming the armature for electromagnet 50, 58, the coil 58 of which is connected to the strip 48. Heating of strip 48 under overload conditions moves the latch 54 downwards to release the actuator 26 and trip the breaker. Under shortcircuit conditions the armature is attracted to release the actuator 26 before damage to the bimetal strip 48 can occur. The latch 54 normally bears on the end of a further bi-metal strip 42 which is provided for ambient temperature compensation. In a modification, Fig. 2, the compensating strip 42 is mounted on the end of bimetal strip 48.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US516143A US2876309A (en) | 1955-06-17 | 1955-06-17 | Circuit breakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB804428A true GB804428A (en) | 1958-11-12 |
Family
ID=24054308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17202/56A Expired GB804428A (en) | 1955-06-17 | 1956-06-04 | Automatic electric circuit breakers |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2876309A (en) |
| DE (1) | DE1085953B (en) |
| FR (1) | FR1153818A (en) |
| GB (1) | GB804428A (en) |
| NL (2) | NL208037A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1513260B1 (en) * | 1965-03-19 | 1970-01-29 | Licentia Gmbh | Thermal trigger |
| US20160012999A1 (en) * | 2014-07-09 | 2016-01-14 | Siemens Industry, Inc. | Low instantaneous level circuit breakers, circuit breaker tripping mechanisms, and tripping methods |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4316163A (en) * | 1978-06-22 | 1982-02-16 | Federal Pacific Electric Company | Thermal-magnetic circuit breaker |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT119407B (en) * | 1928-10-09 | 1930-10-25 | Siemens Ag | Set up at temperature time switches. |
| US2114845A (en) * | 1936-07-15 | 1938-04-19 | Westinghouse Electric & Mfg Co | Circuit interrupter |
| DE701870C (en) * | 1936-09-12 | 1942-02-20 | Siemens Ag | Auto switch |
| US2089716A (en) * | 1937-01-29 | 1937-08-10 | Gen Electric | Circuit breaker |
| US2210260A (en) * | 1939-02-27 | 1940-08-06 | Colt S Mfg Co | Automatic circuit breaker |
| US2323784A (en) * | 1941-02-26 | 1943-07-06 | Westinghouse Electric & Mfg Co | Circuit breaker |
| US2312168A (en) * | 1941-07-25 | 1943-02-23 | Square D Co | Circuit breaker |
| US2360684A (en) * | 1941-10-30 | 1944-10-17 | Westinghouse Electric & Mfg Co | Circuit breaker |
| US2376759A (en) * | 1942-10-30 | 1945-05-22 | Westinghouse Electric & Mfg Co | Circuit breaker |
| US2462212A (en) * | 1944-11-06 | 1949-02-22 | Matthews W N Corp | Protective switch |
| US2624816A (en) * | 1945-05-09 | 1953-01-06 | Westinghouse Electric Corp | Circuit breaker |
| US2685011A (en) * | 1948-06-10 | 1954-07-27 | Wadsworth Electric Mfg Co | Electric circuit breaker |
| US2573307A (en) * | 1949-05-03 | 1951-10-30 | Gen Electric | Calibration of electric circuit breakers |
| US2732455A (en) * | 1953-03-03 | 1956-01-24 | Overload releasing mechanism for automatic circuit breaker |
-
0
- NL NL96953D patent/NL96953C/xx active
- NL NL208037D patent/NL208037A/xx unknown
-
1955
- 1955-06-17 US US516143A patent/US2876309A/en not_active Expired - Lifetime
-
1956
- 1956-06-04 GB GB17202/56A patent/GB804428A/en not_active Expired
- 1956-06-15 FR FR1153818D patent/FR1153818A/en not_active Expired
- 1956-06-16 DE DEF20542A patent/DE1085953B/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1513260B1 (en) * | 1965-03-19 | 1970-01-29 | Licentia Gmbh | Thermal trigger |
| US20160012999A1 (en) * | 2014-07-09 | 2016-01-14 | Siemens Industry, Inc. | Low instantaneous level circuit breakers, circuit breaker tripping mechanisms, and tripping methods |
| US9595413B2 (en) * | 2014-07-09 | 2017-03-14 | Siemens Industry, Inc. | Low instantaneous level circuit breakers, circuit breaker tripping mechanisms, and tripping methods |
Also Published As
| Publication number | Publication date |
|---|---|
| US2876309A (en) | 1959-03-03 |
| NL208037A (en) | |
| NL96953C (en) | |
| DE1085953B (en) | 1960-07-28 |
| FR1153818A (en) | 1958-03-21 |
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