GB775940A - Improvements in or relating to circuit breakers - Google Patents
Improvements in or relating to circuit breakersInfo
- Publication number
- GB775940A GB775940A GB16789/55A GB1678955A GB775940A GB 775940 A GB775940 A GB 775940A GB 16789/55 A GB16789/55 A GB 16789/55A GB 1678955 A GB1678955 A GB 1678955A GB 775940 A GB775940 A GB 775940A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- fluid
- june
- compartment
- porous filter
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/14—Mechanisms with only two stable positions, e.g. acting at definite angular positions
-
- 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
- H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
- H01H71/443—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay with dash-pot
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Breakers (AREA)
- Circuit Breakers (AREA)
Abstract
775,940. Dashpots. ALLIS-CHALMERS MANUFACTURING CO. June 10, 1955 [June 24, 1954], No. 16789/55. Class 108(3). [Also in Group XXXVII] In an electric circuit-breaker the movement of the armature 45 of a tripping electromagnet 40 is delayed by a time-lag device 50 comprising a pair of sealed compartments 54, 55 each having a flexible wall 56, 57 and being interconnected by a porous filter 63 and a unidirectional means 62, 69. When the armature 45 is attracted, a plunger 64 is raised and fluid is forced from compartment 54 through the filter 63 to the compartment 55. When the armature is released, the fluid returns without restriction through the passage 62 past the non-return ball valve 69. In other arrangements the return of the fluid is permitted by a resilient check valve and a more porous filter, Fig. 5 (not shown) or a straight passage, Fig. 6 (not shown). The device 50 is pivoted at 51 in brackets 52 and has an arm 80 secured to an adjusting rod 81 which is vertically movable when a thumb screw 87 is slackened. Adjustment of the rod 81 causes the tilting of the device 50 to suitably position a member 65 in an arcuate slot 68 in an arm extending from the armature to determine the required time delay.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US438982A US2881285A (en) | 1954-06-24 | 1954-06-24 | Time delay device for circuit breakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB775940A true GB775940A (en) | 1957-05-29 |
Family
ID=23742809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16789/55A Expired GB775940A (en) | 1954-06-24 | 1955-06-10 | Improvements in or relating to circuit breakers |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2881285A (en) |
| GB (1) | GB775940A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2220725A (en) * | 1988-07-13 | 1990-01-17 | Exprocad Services Ltd | Shock absorbers |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3073929A (en) * | 1959-06-25 | 1963-01-15 | Westinghouse Electric Corp | Circuit breaker with spring closing mechanism |
| US3187121A (en) * | 1961-10-16 | 1965-06-01 | Robertshaw Controls Co | Time delay actuator having a filter element |
| US3236961A (en) * | 1962-06-28 | 1966-02-22 | Fluristor Corp | Time mechanism having selectively variable time ranges with continuous control of time therein |
| US3662127A (en) * | 1969-09-26 | 1972-05-09 | Hercules Inc | Diffusion timing mechanism |
| GB2027160B (en) * | 1978-06-14 | 1983-03-23 | Secoh Giken Kk | Hydraulic piston-cylinder damper |
| US4297554A (en) * | 1980-01-24 | 1981-10-27 | G & W Electric Specialty Company | Time delay switch mechanism |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1389140A (en) * | 1921-08-30 | Electromagnet device | ||
| US894910A (en) * | 1907-03-26 | 1908-08-04 | William M Scott | Automatic magnetic circuit-breaker. |
| US1138800A (en) * | 1912-01-31 | 1915-05-11 | William M Scott | Circuit-breaker. |
| US1449025A (en) * | 1920-02-20 | 1923-03-20 | Reliance Company | Dashpot controlled switch |
| US1729565A (en) * | 1925-07-22 | 1929-09-24 | Caretta Ettore | Fluid-operating shock absorber |
| FR642711A (en) * | 1927-03-25 | 1928-09-03 | Hydraulic retarder and damper | |
| US2103378A (en) * | 1933-08-24 | 1937-12-28 | American Gasaccumulator Co | Time delay apparatus |
| US2579334A (en) * | 1949-07-30 | 1951-12-18 | Shell Dev | Adjustable-rate differential pressure responsive device |
| US2740074A (en) * | 1953-04-03 | 1956-03-27 | Euclid Electric & Mfg Company | Electric control device |
| US2702398A (en) * | 1954-05-03 | 1955-02-22 | Arthur P Marcus | Door closer |
-
1954
- 1954-06-24 US US438982A patent/US2881285A/en not_active Expired - Lifetime
-
1955
- 1955-06-10 GB GB16789/55A patent/GB775940A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2220725A (en) * | 1988-07-13 | 1990-01-17 | Exprocad Services Ltd | Shock absorbers |
Also Published As
| Publication number | Publication date |
|---|---|
| US2881285A (en) | 1959-04-07 |
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