GB739071A - Thermally-responsive electric switches - Google Patents
Thermally-responsive electric switchesInfo
- Publication number
- GB739071A GB739071A GB2330252A GB2330252A GB739071A GB 739071 A GB739071 A GB 739071A GB 2330252 A GB2330252 A GB 2330252A GB 2330252 A GB2330252 A GB 2330252A GB 739071 A GB739071 A GB 739071A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contact
- plunger
- sept
- bowed
- upwards
- 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
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H77/04—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrothermal opening
Landscapes
- Push-Button Switches (AREA)
Abstract
739,071. Thermal switches; snap-action switches. C.A.V., Ltd. Sept. 2, 1953 [Sept. 17, 1952], No. 23302/52. Class 38 (5). A switch has one contact g mounted, for normal operation, on a push-pull plunger b, the co-operating contact k being carried by the centre limb of a three-limb bimetal element n which responds to overloads. The outer limbs of elements n are normally slightly bowed downwards with contact k projecting slightly upwards, as shown, the element n also being slightly bowed transversely. When heated, the element n snaps over to open the contacts rapidly. The plunger is located in its respective positions by spring-loaded balls e which engage recesses f in the body a and has an insulating button q engageable with the underside of element n so as to reset it when the plunger is pulled. In a modification, the element n may be initially bowed upwards and the contact g and button q interchanged.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2330252A GB739071A (en) | 1952-09-17 | 1952-09-17 | Thermally-responsive electric switches |
| CH337921D CH337921A (en) | 1952-09-17 | 1955-10-18 | Electric switch |
| FR1133186D FR1133186A (en) | 1952-09-17 | 1955-10-20 | Electric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2330252A GB739071A (en) | 1952-09-17 | 1952-09-17 | Thermally-responsive electric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB739071A true GB739071A (en) | 1955-10-26 |
Family
ID=10193423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2330252A Expired GB739071A (en) | 1952-09-17 | 1952-09-17 | Thermally-responsive electric switches |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH337921A (en) |
| FR (1) | FR1133186A (en) |
| GB (1) | GB739071A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1112159B (en) * | 1959-04-09 | 1961-08-03 | Standard Elektrik Lorenz Ag | Pressure point button, especially for telephony devices |
-
1952
- 1952-09-17 GB GB2330252A patent/GB739071A/en not_active Expired
-
1955
- 1955-10-18 CH CH337921D patent/CH337921A/en unknown
- 1955-10-20 FR FR1133186D patent/FR1133186A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1133186A (en) | 1957-03-21 |
| CH337921A (en) | 1959-04-30 |
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