GB1513728A - Thermally responsive switching arrangements - Google Patents
Thermally responsive switching arrangementsInfo
- Publication number
- GB1513728A GB1513728A GB3804174A GB3804174A GB1513728A GB 1513728 A GB1513728 A GB 1513728A GB 3804174 A GB3804174 A GB 3804174A GB 3804174 A GB3804174 A GB 3804174A GB 1513728 A GB1513728 A GB 1513728A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- rotary switch
- thermally responsive
- contacts
- causing
- 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
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/50—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring
- H01H3/503—Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring making use of electromagnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/12—Means for adjustment of "on" or "off" operating temperature
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermally Actuated Switches (AREA)
Abstract
1513728 Mechanica switches; automatic circuit breakers HOTPOINT LTD 28 Aug 1975 [30 Aug 1974] 38041/74 Heading H1N A thermally responsive switching arrangement comprises a rotary switch biased towards an off position and angularly movable to selected positions in each of which it is connected in circuit with a thermally responsive device 29, electromagnetically releasable locking means 19 for retaining the rotary switch in the desired angular position and which is released so that the rotary switch returns to the off position when the thermally responsive device 29 responds to a predetermined temperature. The rotary switch comprises a rotatable shaft 4 connected to a disc 5 carrying a wiper arm 6 for bridging pairs of contacts 8 on a printed circuit board 9. The contact pairs 8 are connected to switches 29 responsive to different predetermined temperatures of a washing liquid of a washing machine (or of a tumbler dryer). When the shaft 4 is moved against spring bias 30 to a selected position in which the arm 6 bridges one of the contact pairs 8, the contacts 33, 36 of a microswitch 15 are changed over by a cam 13 connected to the shaft 4 causing a heating element 34 of the washing machine to be energised. The shaft 4 is retained in the selected angular position by a spring biased armature 19 engaging a groove 18 in a member 12 connected to the shaft 4. When the predetermined temperature corresponding to the selected position of the rotary switch has been reached, the relevant thermal switch 29 is closed causing current to flow through the contact pair 8, the thermal switch 29 and through the winding 27 of an electromagnet 25 which releases the armature 19 from the groove 18 causing the shaft 4 to return to the off position by the spring 30 and the contacts 33, 36 of the mainswitch 15 to change over again.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3804174A GB1513728A (en) | 1975-08-28 | 1975-08-28 | Thermally responsive switching arrangements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3804174A GB1513728A (en) | 1975-08-28 | 1975-08-28 | Thermally responsive switching arrangements |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1513728A true GB1513728A (en) | 1978-06-07 |
Family
ID=10400770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3804174A Expired GB1513728A (en) | 1975-08-28 | 1975-08-28 | Thermally responsive switching arrangements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1513728A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2225901A (en) * | 1988-12-12 | 1990-06-13 | Bosch Siemens Hausgeraete | Mechanically coupled switches |
GB2242570A (en) * | 1990-03-27 | 1991-10-02 | Crabtree Electrical Ind Ltd | "Contactor and switch therefor" |
-
1975
- 1975-08-28 GB GB3804174A patent/GB1513728A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2225901A (en) * | 1988-12-12 | 1990-06-13 | Bosch Siemens Hausgeraete | Mechanically coupled switches |
GB2225901B (en) * | 1988-12-12 | 1992-10-14 | Bosch Siemens Hausgeraete | Switch coupling in an appliance |
GB2242570A (en) * | 1990-03-27 | 1991-10-02 | Crabtree Electrical Ind Ltd | "Contactor and switch therefor" |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |