GB557576A - Improvements in overload switches - Google Patents
Improvements in overload switchesInfo
- Publication number
- GB557576A GB557576A GB13827/42A GB1382742A GB557576A GB 557576 A GB557576 A GB 557576A GB 13827/42 A GB13827/42 A GB 13827/42A GB 1382742 A GB1382742 A GB 1382742A GB 557576 A GB557576 A GB 557576A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heating coil
- bimetal strip
- switches
- switch
- plate
- 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
-
- 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
- H01H71/16—Electrothermal mechanisms with bimetal element
- H01H71/164—Heating elements
-
- 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
- H01H2071/109—Operating or release mechanisms with provisions for selecting between automatic or manual reset
Landscapes
- Thermally Actuated Switches (AREA)
Abstract
557,576. Thermal switches. ARROW ELECTRIC SWITCHES, Ltd. May 27, 1941, No. 13827/42. Convention date, June 14, 1940. Divided out of 557,543. [Class 38 (v)] In a thermally operated overload switch in which the current passes through a heating coil 14 to cause the bending of a bimetal strip 16 and movement of a switchoperating lever 50, the bimetal strip is shielded from the heating coil 14 by a thin metal plate 22. Excessive heating causes a projection 24 on the plate to engage and short circuit the heater 14. The switch may be of the kind described in Specification 557,543.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US340587A US2322161A (en) | 1940-06-14 | 1940-06-14 | Overload relay switch |
Publications (1)
Publication Number | Publication Date |
---|---|
GB557576A true GB557576A (en) | 1943-11-25 |
Family
ID=23334041
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13827/42A Expired GB557576A (en) | 1940-06-14 | 1941-05-27 | Improvements in overload switches |
GB6779/41A Expired GB557543A (en) | 1940-06-14 | 1941-05-27 | A manually or automatically resettable electric snap action switch |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6779/41A Expired GB557543A (en) | 1940-06-14 | 1941-05-27 | A manually or automatically resettable electric snap action switch |
Country Status (2)
Country | Link |
---|---|
US (1) | US2322161A (en) |
GB (2) | GB557576A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2513748A (en) * | 1944-04-24 | 1950-07-04 | Square D Co | Electric switch |
US2571812A (en) * | 1949-11-01 | 1951-10-16 | Westinghouse Electric Corp | Thermostatic overload relay |
US2855486A (en) * | 1957-08-15 | 1958-10-07 | Robertshaw Fulton Controls Co | Thermostatic switches |
US2942081A (en) * | 1958-02-13 | 1960-06-21 | Westinghouse Electric Corp | Thermal overload relay |
US2897319A (en) * | 1958-06-26 | 1959-07-28 | Gen Electric | Electric switch |
US3038051A (en) * | 1959-08-07 | 1962-06-05 | Gen Electric Canada | Thermal device |
US3114023A (en) * | 1959-09-22 | 1963-12-10 | Zinsco Electrical Products | Thermal electric circuit breaker |
US3152235A (en) * | 1961-06-09 | 1964-10-06 | Furnas Electric Co | Bi-metallic overload relay having snap switch toggle action |
DE2947626C2 (en) * | 1979-11-27 | 1985-06-20 | Brown, Boveri & Cie Ag, 6800 Mannheim | Thermal bimetal arrangement for an electrical switching device |
-
1940
- 1940-06-14 US US340587A patent/US2322161A/en not_active Expired - Lifetime
-
1941
- 1941-05-27 GB GB13827/42A patent/GB557576A/en not_active Expired
- 1941-05-27 GB GB6779/41A patent/GB557543A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB557543A (en) | 1943-11-25 |
US2322161A (en) | 1943-06-15 |
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