GB742724A - Improvements in or relating to thermally-responsive electric switches - Google Patents
Improvements in or relating to thermally-responsive electric switchesInfo
- Publication number
- GB742724A GB742724A GB534853A GB534853A GB742724A GB 742724 A GB742724 A GB 742724A GB 534853 A GB534853 A GB 534853A GB 534853 A GB534853 A GB 534853A GB 742724 A GB742724 A GB 742724A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- strips
- operating
- armature
- temperature
- 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
- 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
- H01H37/521—Thermally-sensitive members actuated due to deflection of bimetallic element comprising a plurality of bimetals acting in the same direction
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
Abstract
742,724. Thermal switches; switches, partly magnetic. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Feb. 24, 1954 [Feb. 26, 1953], No. 5348/53. Class 38(5) A thermostat comprises a pair of bimetal strips 13, 14 mounted on arms 11, 12 of a member 7 having a pair of spaced ears 8 through which a spindle 10 passes to pivotally mount the member 7 on a casing projection 5. The strips 13, 14 have their high expansion sides facing each other, the strip 13 co-operating with a snail cam 16 for adjustment of the operating temperature, and the strip 14 carrying an armature 22 co-operating with a magnet 27. An offset extension 24 of the armature carries an insulating strip 25 co-operating with a stud 43 on an arm 38 supporting a contact 37. The arm 38 is supported by a resilient strip 40 whereby the contact 37 is biased towards a fixed contact 32. On rise of temperature the strips 13,14 deflect away from each other, the strip 13 engaging the cam 16 whereby its deflection is transmitted through the pivoted member 7 to the strip 14 and augments the deflecting force of the latter. Eventually, the armature 22 leaves the magnet 27 and the strip 25 strikes the stud 43 and the contacts 32, 37 are opened. In a modification in which the contacts are opened in response to a fall in temperature, the low expansion sides of the strips 13, 14 face each other. The thermostat may be used in conjunction with the air heater disclosed in Specification 730,299, [Group XI].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB534853A GB742724A (en) | 1953-02-26 | 1953-02-26 | Improvements in or relating to thermally-responsive electric switches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB534853A GB742724A (en) | 1953-02-26 | 1953-02-26 | Improvements in or relating to thermally-responsive electric switches |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB742724A true GB742724A (en) | 1956-01-04 |
Family
ID=9794411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB534853A Expired GB742724A (en) | 1953-02-26 | 1953-02-26 | Improvements in or relating to thermally-responsive electric switches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB742724A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2949519A (en) * | 1957-06-10 | 1960-08-16 | C E Armstrong Company | Thermostat |
-
1953
- 1953-02-26 GB GB534853A patent/GB742724A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2949519A (en) * | 1957-06-10 | 1960-08-16 | C E Armstrong Company | Thermostat |
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