GB560264A - Improvements in contact arrangements of electric switches - Google Patents
Improvements in contact arrangements of electric switchesInfo
- Publication number
- GB560264A GB560264A GB15208/42A GB1520842A GB560264A GB 560264 A GB560264 A GB 560264A GB 15208/42 A GB15208/42 A GB 15208/42A GB 1520842 A GB1520842 A GB 1520842A GB 560264 A GB560264 A GB 560264A
- Authority
- GB
- United Kingdom
- Prior art keywords
- base
- contacts
- contact
- spring
- arm
- 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
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/02—Energy stored by the attraction or repulsion of magnetic parts
Landscapes
- Thermally Actuated Switches (AREA)
- Breakers (AREA)
Abstract
560,264. Thermal switches. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 29, 1942, No. 15208. Convention date, Oct. 31, 1941. [Class 38 (v)] A thermally-operated element acts on a pivoted contact base 31 to open a circuit. One fixed contact 24 is attached to a part of the casing but is preferably mounted on a flat bent strip spring, while the other 34 is carried on a spring blade 33 fixed to the base 31 and extending down behind a rigid magnetisable arm 35 secured at its upper end to the blade 33 near its connection with the base 31. The contact 34 is borne on a pin 34a which passes through the arm 35. A permanent magnet 28 is mounted so as to hold the contacts in engaged 'position. Successive positions taken up by the contact arm in opening and closing the circuit are shown at a ... e in the Figure. The pivoted base 31 is caused to rotate anticlockwise under the pressure of a thermostatically operated arm on the projection shown. The contacts remain held together by magnetic force while the spring bends at 37 until at a given point they snap apart, the spring straightening (position c). On release of' the thermostatic pressure the magnetic attraction on the armature 35 causes rotation of the base 31 in a clockwise direction, say from position c to position d, when the attraction overcomes the spring 37 to bring the contacts together (position e). During these operations, the movement of the contact 34 is first a sliding one downward (position b), which will break any weld on the contacts. On re-making the circuit, a weld may occur which will hold through continued movement clockwise of the base 31 until position a is reached. If no weld happens there will be a slight upward sliding movement from position e. Provision is made for the contacts to be held apart in one position of the knob adjusting the thermal device (not shown). Specifications 423,897, 424,746, [both in Group II], and 451,832 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US560264XA | 1941-10-31 | 1941-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB560264A true GB560264A (en) | 1944-03-28 |
Family
ID=22001683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15208/42A Expired GB560264A (en) | 1941-10-31 | 1942-10-29 | Improvements in contact arrangements of electric switches |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB560264A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3204060A (en) * | 1959-12-29 | 1965-08-31 | Philco Corp | Snap-action magnetic switch employing a flexible bimetal switch arm |
-
1942
- 1942-10-29 GB GB15208/42A patent/GB560264A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3204060A (en) * | 1959-12-29 | 1965-08-31 | Philco Corp | Snap-action magnetic switch employing a flexible bimetal switch arm |
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