EP0165731A3 - Improvements in electrical switches - Google Patents
Improvements in electrical switches Download PDFInfo
- Publication number
- EP0165731A3 EP0165731A3 EP85303808A EP85303808A EP0165731A3 EP 0165731 A3 EP0165731 A3 EP 0165731A3 EP 85303808 A EP85303808 A EP 85303808A EP 85303808 A EP85303808 A EP 85303808A EP 0165731 A3 EP0165731 A3 EP 0165731A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- electrical
- centre
- over
- resetting
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
- H01H37/5409—Bistable switches; Resetting means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/26—Snap-action arrangements depending upon deformation of elastic members
- H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/64—Contacts
- H01H37/70—Resetting means
- H01H2037/705—Resetting means wherein the switch cannot be closed when the temperature is above a certain value
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/60—Means for producing snap action
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
Abstract
An electrical switch for protecting equipment from
oerheating has a bimetallic element (16) which breaks
electrical contact at a threshold temperature and a resetting
member (40) which restores it when depressed manually. A
bistable, over-centre contact member (24) is arranged such
that initial movement of the resetting member moves the
contact member over-centre, but also displaces the contact
member, leaving the electrical contacts disengaged. Electric
al contact is only restored on release of the resetting
member. In this way the risks of manual tampering with the
switch are reduced.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8413912 | 1984-05-31 | ||
GB848413912A GB8413912D0 (en) | 1984-05-31 | 1984-05-31 | Electrical switches |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0165731A2 EP0165731A2 (en) | 1985-12-27 |
EP0165731A3 true EP0165731A3 (en) | 1988-05-18 |
Family
ID=10561747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85303808A Withdrawn EP0165731A3 (en) | 1984-05-31 | 1985-05-30 | Improvements in electrical switches |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0165731A3 (en) |
GB (1) | GB8413912D0 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2675965B1 (en) * | 1991-04-26 | 1993-08-06 | Secap | THERMAL PROTECTION DEVICE IN A TEMPERATURE LIMIT DOMAIN, IN PARTICULAR FOR A RECORDING APPARATUS FOR DATA RECORDED BY BATTERIES AND IN PARTICULAR POSTAGE MACHINE. |
FR2713372B1 (en) * | 1993-12-01 | 1996-03-01 | Neopost Ind | Thermal protection device for secure electronic device, in particular postage meter. |
GB9904391D0 (en) * | 1999-02-25 | 1999-04-21 | Otter Controls Ltd | Improvements relating to thermal controls |
CN109119272A (en) * | 2018-09-25 | 2019-01-01 | 深圳马太亚科技有限公司 | Mute microswitch and mouse |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1615217A1 (en) * | 1967-09-07 | 1970-05-27 | Dreefs E Elektro Fab | Temperature limiter for electrical devices |
US3924213A (en) * | 1974-09-30 | 1975-12-02 | Ranco Inc | Thermostat |
DE2824272B1 (en) * | 1978-05-24 | 1979-09-13 | Landis & Gyr Ag | Intrinsically safe temperature limiter |
US4480246A (en) * | 1982-10-18 | 1984-10-30 | Therm-O-Disc, Incorporated | Trip-free manual reset thermostat |
-
1984
- 1984-05-31 GB GB848413912A patent/GB8413912D0/en active Pending
-
1985
- 1985-05-30 EP EP85303808A patent/EP0165731A3/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1615217A1 (en) * | 1967-09-07 | 1970-05-27 | Dreefs E Elektro Fab | Temperature limiter for electrical devices |
US3924213A (en) * | 1974-09-30 | 1975-12-02 | Ranco Inc | Thermostat |
DE2824272B1 (en) * | 1978-05-24 | 1979-09-13 | Landis & Gyr Ag | Intrinsically safe temperature limiter |
US4480246A (en) * | 1982-10-18 | 1984-10-30 | Therm-O-Disc, Incorporated | Trip-free manual reset thermostat |
Also Published As
Publication number | Publication date |
---|---|
GB8413912D0 (en) | 1984-07-04 |
EP0165731A2 (en) | 1985-12-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19881118 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MURRAY, ALAN |