GB454083A - Improvements in and relating to electric circuit breakers - Google Patents
Improvements in and relating to electric circuit breakersInfo
- Publication number
- GB454083A GB454083A GB12581/36A GB1258136A GB454083A GB 454083 A GB454083 A GB 454083A GB 12581/36 A GB12581/36 A GB 12581/36A GB 1258136 A GB1258136 A GB 1258136A GB 454083 A GB454083 A GB 454083A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- contact
- enclosure
- bracket
- breaker
- 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
- H01H71/1009—Interconnected mechanisms
-
- 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
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
- H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor
Landscapes
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Circuit Breakers (AREA)
Abstract
454,083. Heavy - current switches. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London. May 4, 1936, No. 12581. Convention date, May 4, 1935. [Class 38 (v)] Magnetic blow - outs.-a circuit-breaker comprises a pair of relatively-movable contacts enclosed within walls of pressure-resistant material forming a sealed compression chamber having a volume such that high gas pressures' are generated therein by the arc formed between the contacts, and means including a permanent magnet for producing a magnetic field substantially at right-angles to the path of movement of the operated contact adjacent the point of separation of the contacts. The use of the magnetic field renders the breaker suitable for D.C. working. Fig. 1 shows the invention applied to a breaker as described in Specification 420,042, in which a brass or other non-magnetic compression chamber 12 is housed in an enclosure 11 integral with the moulded-insulation base 10, and has insulating bushings 13, 14, in the former of which the fixed contact 15 is secured, while the movable contact 17 is slidable in 14 and sealing means co-operate with 14, 17 to seal the chamber 12 in a gas-tight manner. The permanent magnet 19, Fig. 4, is U-shaped and its poles pass through apertures 20 in the enclosure 11 and are curved in conformity with the curvature of the chamber 12 on which they abut, so providing a blow-out field at right-angles to the direction of movement of contact 17. The magnet comprises material of high coercive force, alloys as described, for example, in Specifications 423,897 and 424,746, [both in Group II], being suitable. The switch " movement " comprises a pin 34 serving as a pivot for an operating handle 33, for a member 39 having a pin 35 taking in a slot in contact 17, and for a trip member 43 carrying a latch part 42 normally held in the position shown by a bimetallic latch 41. By means of a pair of springs 31 anchored between the pins 32, 35, contact 17 can be moved on and off with a snap action by means of the handle 33. When the latch 41 flexes on overload and releases the latch part 42, a part (not shown), on the member 43 engages the cross-arm 40 uniting the two limbs of member 39 and forces the switch to the off position. The driving force is provided by a rod 44 engaging a notch in member 43 and having a compression spring 45 engaging at one end an enlargement on the rod 44 and at the other a stop 46 co-operating with parts 27 on the frame 26. The stop 46 also clamps between itself and the enclosure 11 a part 24 of the bracket 22, the part 23 of which lies over the yoke of the magnet 19 and holds it in place against the enclosure 11. A member 25, Fig. 4, insulates the magnet from the bracket 22 and switch " movement." The breaker is adapted for D.C. working by inserting the magnet and bracket and clamping the whole by mounting the frame 26 on the base 10. For A.C. working the bracket and magnet are omitted.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US667855A US2047815A (en) | 1933-04-25 | 1933-04-25 | Circuit breaker |
US667856A US2047842A (en) | 1933-04-25 | 1933-04-25 | Circuit breaker |
US454083XA | 1934-05-04 | 1934-05-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB454083A true GB454083A (en) | 1936-09-23 |
Family
ID=31891951
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12467/34A Expired GB420042A (en) | 1933-04-25 | 1934-04-25 | Improvements in and relating to arc extinguishing arrangements for electric circuit breakers |
GB12581/36A Expired GB454083A (en) | 1933-04-25 | 1936-05-04 | Improvements in and relating to electric circuit breakers |
GB14967/37A Expired GB483889A (en) | 1933-04-25 | 1937-05-29 | Improvements in and relating to electric circuit breakers having arc-extinguishing provision |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12467/34A Expired GB420042A (en) | 1933-04-25 | 1934-04-25 | Improvements in and relating to arc extinguishing arrangements for electric circuit breakers |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14967/37A Expired GB483889A (en) | 1933-04-25 | 1937-05-29 | Improvements in and relating to electric circuit breakers having arc-extinguishing provision |
Country Status (3)
Country | Link |
---|---|
US (4) | US2047815A (en) |
FR (3) | FR772259A (en) |
GB (3) | GB420042A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2119575A (en) * | 1982-04-29 | 1983-11-16 | Bbc Brown Boveri & Cie | Explosion-proof or flame-proof electrical switching device |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2486888A (en) * | 1945-02-05 | 1949-11-01 | Arrow Hart & Hegeman Electric | Current responsive relay with shock and ambient temperature compensating means |
US2866026A (en) * | 1954-09-22 | 1958-12-23 | Westinghouse Electric Corp | Circuit breakers |
US2811612A (en) * | 1956-02-23 | 1957-10-29 | Mc Graw Edison Co | Load break interrupter |
US3132222A (en) * | 1961-12-28 | 1964-05-05 | Gen Electric | High voltage circuit breaker |
US3668351A (en) * | 1969-07-30 | 1972-06-06 | Kearney National Inc | Sectionalizing and protective apparatus for single house transformer |
BE793833A (en) * | 1972-01-14 | 1973-05-02 | Telemecanique Electrique | ARMING AND TRIPPING DEVICE FOR THERMAL RELAY |
JPS58131631A (en) * | 1982-01-30 | 1983-08-05 | 松下電工株式会社 | Circuit breaker |
GB2169749A (en) * | 1985-01-12 | 1986-07-16 | Ashley Accessories Ltd | Electrical outlet accessories with incorporated automatic circuit breaker |
US5335928A (en) * | 1993-09-16 | 1994-08-09 | Cannondale Corporation | Bicycle bottom bracket/crank assembly |
CN114284114B (en) * | 2021-11-19 | 2024-04-05 | 河南平高电气股份有限公司 | High-voltage circuit breaker and circuit breaker connecting box |
-
1933
- 1933-04-25 US US667855A patent/US2047815A/en not_active Expired - Lifetime
- 1933-04-25 US US667856A patent/US2047842A/en not_active Expired - Lifetime
-
1934
- 1934-04-24 FR FR772259D patent/FR772259A/en not_active Expired
- 1934-04-25 GB GB12467/34A patent/GB420042A/en not_active Expired
-
1935
- 1935-05-04 US US19828A patent/US2053972A/en not_active Expired - Lifetime
- 1935-07-02 US US29479A patent/US2053934A/en not_active Expired - Lifetime
-
1936
- 1936-05-04 GB GB12581/36A patent/GB454083A/en not_active Expired
- 1936-05-04 FR FR47374D patent/FR47374E/en not_active Expired
-
1937
- 1937-05-28 FR FR48505D patent/FR48505E/en not_active Expired
- 1937-05-29 GB GB14967/37A patent/GB483889A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2119575A (en) * | 1982-04-29 | 1983-11-16 | Bbc Brown Boveri & Cie | Explosion-proof or flame-proof electrical switching device |
Also Published As
Publication number | Publication date |
---|---|
GB483889A (en) | 1938-04-27 |
GB420042A (en) | 1934-11-23 |
US2053934A (en) | 1936-09-08 |
US2047842A (en) | 1936-07-14 |
US2053972A (en) | 1936-09-08 |
FR47374E (en) | 1937-03-25 |
US2047815A (en) | 1936-07-14 |
FR772259A (en) | 1934-10-26 |
FR48505E (en) | 1938-03-08 |
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