GB1433433A - Thermally sensitive electrical switch - Google Patents
Thermally sensitive electrical switchInfo
- Publication number
- GB1433433A GB1433433A GB750874A GB750874A GB1433433A GB 1433433 A GB1433433 A GB 1433433A GB 750874 A GB750874 A GB 750874A GB 750874 A GB750874 A GB 750874A GB 1433433 A GB1433433 A GB 1433433A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- switching pad
- expands
- bridges
- switch
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K5/00—Measuring temperature based on the expansion or contraction of a material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/029—Composite material comprising conducting material dispersed in an elastic support or binding material
-
- 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
- H01H37/36—Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
- Push-Button Switches (AREA)
Abstract
1433433 Thermal switches; switch contacts ESSEX INTERNATIONAL Inc 19 Feb 1974 [7 March 1973] 7508/74 Heading H1N A thermal switch comprises a thermally expansible and contractile material 23 which expands on a rise in temperature to deform a resilient mass 25 to compress a conductive rubber switching pad 29 to bridge between terminal 15 and body 2. Material 23 may be a microcrystalline wax, with or without metal particles, which melts and expands at a critical temperature, or for higher temperatures, a eutectic solder. The resilient mass 25 may be silicone rubber. Switching pad 29 may be of silicone rubber throughout which is dispersed conductive particles such as copper or other base metal spheres coated with a noble metal such as silver, such as in Specification 1,290,963 and when compressed. it bridges the gap between terminal 15 and body 2. The operating temperature may be adjusted slightly by deforming end wall 18. In a second embodiment, Figs. 4, 5 (not shown), the switching pad bridges between two terminals (44), (45). The switch is intended for sensing engine block temperature in an internal combustion engine and completes a circuit to a warning lamp L.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00339000A US3839694A (en) | 1973-03-07 | 1973-03-07 | Thermally sensitive electrical switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1433433A true GB1433433A (en) | 1976-04-28 |
Family
ID=23327031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB750874A Expired GB1433433A (en) | 1973-03-07 | 1974-02-19 | Thermally sensitive electrical switch |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3839694A (en) |
| JP (1) | JPS49120176A (en) |
| BR (1) | BR7401693D0 (en) |
| CA (1) | CA1016979A (en) |
| DE (1) | DE2411022C3 (en) |
| FR (1) | FR2220862B1 (en) |
| GB (1) | GB1433433A (en) |
| IT (1) | IT1008376B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979570A (en) * | 1973-05-16 | 1976-09-07 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Switching apparatus |
| US3918020A (en) * | 1974-10-24 | 1975-11-04 | Essex International Inc | Multi-stage switching apparatus |
| DE2625561B2 (en) * | 1976-06-05 | 1980-02-21 | Behr-Thomson Dehnstoffregler Gmbh, 7014 Kornwestheim | Control circuit for regulating the flow of a liquid or gaseous medium |
| DE2749615C2 (en) * | 1977-11-05 | 1986-12-18 | Behr-Thomson Dehnstoffregler Gmbh, 7014 Kornwestheim | Electrical switching device dependent on the ambient temperature |
| US4225841A (en) * | 1977-07-21 | 1980-09-30 | Behr-Thomson Dehnstoffregler Gmbh | Temperature-dependent switch |
| US4155062A (en) * | 1977-09-22 | 1979-05-15 | Essex Group, Inc. | Thermally sensitive electrical switch |
| JPS58154545U (en) * | 1982-04-12 | 1983-10-15 | 株式会社日立製作所 | super heat switch |
| US6879239B2 (en) * | 2002-04-08 | 2005-04-12 | Woodlane Environmental Technology, Inc. | Thermostat assembly |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1025676B (en) * | 1952-11-07 | 1958-03-06 | Gen Motors Corp | Power element for control devices that respond to fluctuations in temperature |
| US2744981A (en) * | 1953-06-16 | 1956-05-08 | Morton F Spears | Means for controlling current flow in electric circuits |
| US3212337A (en) * | 1960-11-03 | 1965-10-19 | Texas Instruments Inc | Thermally responsive actuators |
| US3509296A (en) * | 1967-10-23 | 1970-04-28 | Ncr Co | Resilient variable-conductivity circuit controlling means |
| US3648002A (en) * | 1970-05-04 | 1972-03-07 | Essex International Inc | Current control apparatus and methods of manufacture |
-
1973
- 1973-03-07 US US00339000A patent/US3839694A/en not_active Expired - Lifetime
-
1974
- 1974-02-04 CA CA191,856A patent/CA1016979A/en not_active Expired
- 1974-02-19 GB GB750874A patent/GB1433433A/en not_active Expired
- 1974-03-06 FR FR7407692A patent/FR2220862B1/fr not_active Expired
- 1974-03-07 IT IT49072/74A patent/IT1008376B/en active
- 1974-03-07 BR BR1693/74A patent/BR7401693D0/en unknown
- 1974-03-07 JP JP49025823A patent/JPS49120176A/ja active Pending
- 1974-03-07 DE DE2411022A patent/DE2411022C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2411022A1 (en) | 1974-09-19 |
| IT1008376B (en) | 1976-11-10 |
| FR2220862A1 (en) | 1974-10-04 |
| US3839694A (en) | 1974-10-01 |
| JPS49120176A (en) | 1974-11-16 |
| CA1016979A (en) | 1977-09-06 |
| DE2411022B2 (en) | 1978-01-19 |
| DE2411022C3 (en) | 1983-11-24 |
| FR2220862B1 (en) | 1978-10-27 |
| BR7401693D0 (en) | 1974-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |