GB536701A - Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus - Google Patents
Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatusInfo
- Publication number
- GB536701A GB536701A GB341440A GB341440A GB536701A GB 536701 A GB536701 A GB 536701A GB 341440 A GB341440 A GB 341440A GB 341440 A GB341440 A GB 341440A GB 536701 A GB536701 A GB 536701A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thermal
- contacts
- supply
- current
- strip
- 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
- H01H61/00—Electrothermal relays
- H01H61/06—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
- H01H61/08—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts wherein the make-to-break ratio is varied by hand setting or current strength
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
536,701. Thermal switches. BRITISH THOMSON-HOUSTON CO., Ltd., CLOUGH, F. H., and MILWARD, V. E. Feb..23, 1940, No. 3414. [Class 38 (v)] Heating apparatus is energized for a controllable period in each cycle of operation of a thermal responsive element operated by its own heating coil switched on and off at pre-determined positions of the thermal device. A bi-metallic strip 1 is caused to open by heat in a coil 3, wound about it, and energized through contacts 7. On reaching the upper stop 9 the contacts 7 are separated and the thermal strip cools until by pressing the stop 8 the contacts 7 are again closed and the cycle repeats. A magnetic " detent " 10, 11 may be used to ensure a snap action. An adjustable contact 13 co-operates with a contact 14 borne by the thermal strip to regulate the extent of the period during which current passes to the heating apparatus controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB341440A GB536701A (en) | 1940-02-23 | 1940-02-23 | Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB341440A GB536701A (en) | 1940-02-23 | 1940-02-23 | Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB536701A true GB536701A (en) | 1941-05-23 |
Family
ID=9757885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB341440A Expired GB536701A (en) | 1940-02-23 | 1940-02-23 | Improvements in thermal switching devices for automatically regulating the supply of current to electrical apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB536701A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547171A (en) * | 1947-10-31 | 1951-04-03 | Essex Wire Corp | Snap switch |
| US3239632A (en) * | 1962-10-04 | 1966-03-08 | G V Controls Inc | Electrothermal device for cyclic contact operation |
-
1940
- 1940-02-23 GB GB341440A patent/GB536701A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547171A (en) * | 1947-10-31 | 1951-04-03 | Essex Wire Corp | Snap switch |
| US3239632A (en) * | 1962-10-04 | 1966-03-08 | G V Controls Inc | Electrothermal device for cyclic contact operation |
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