GB277383A - Improvements in or relating to electric switches and thermal cut-outs - Google Patents
Improvements in or relating to electric switches and thermal cut-outsInfo
- Publication number
- GB277383A GB277383A GB24127/27A GB2412727A GB277383A GB 277383 A GB277383 A GB 277383A GB 24127/27 A GB24127/27 A GB 24127/27A GB 2412727 A GB2412727 A GB 2412727A GB 277383 A GB277383 A GB 277383A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wheel
- pawl
- spring
- tending
- action
- 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
- H01H61/00—Electrothermal relays
- H01H61/06—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
- H01H61/08—Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts wherein the make-to-break ratio is varied by hand setting or current strength
Landscapes
- Thermally Actuated Switches (AREA)
Abstract
277,383. GrÚby, E. Sept. 13, 1926, [Convention date]. Void [Published under Sect. 91 of the Acts]. Thermal switches; switches, quick-action.-A device for regulating the temperature of electric irons &c. comprises a contact 37 co-operating with a fixed contact 52 and carried by a wheel 30 oscillated by two bimetallic strips 22, 22<1> or other thermal devices, such as fluid operated pistons. When the iron becomes hot, the strip 22 bends down, lowers a rod 21 and rotates a member 20 about an axis 19<2> and an arm 20<1> on the member 20 engages a spring 34 connected to the wheel 30, the spring 34 becoming stressed and tending to rotate the wheel 30 in a clockwise direction. The strip 22<1> also bends down, lowers a rod 21<1> and rotates a spindle 25 thereby stressing a blade spring 28 arranged between the spindle and the wheel 30 and tending to rotate the wheel 30 in a clockwise direction. The wheel 30 is prevented from rotating under the action of the springs 34, 28 bv a pawl 46 engaging a tooth 42 until the pawl is moved away by the left hand end of the member 20 engaging a pin 48 on the pawl, whereupon the wheel 30 swings round and effects a quick break between the contacts 37, 52. The moment of release is regulated by raising or lowering the pivot 19<2> by rotating an arm 11. The strips 22, 22<1> now cool and the spring 28 is stressed in a direction tending to move the wheel 30 in a counter-clockwise direction. The pawl 46 bearing on the inclines 45, 44 on the wheel 30 serves at first to retard the action and finally to give a quick make. The strength of the spring acting on the pawl 46 may be adjusted by moving a lever 50. Contacts.-The contact 37 is electrically connected to the terminal 40 by means of a crank 39 and connecting bar 38. Indicators.-The position of the switch is indicated by a pointer connected to the wheel 30 and also by a lamp in parallel with the heating circuit which lights up when the switch is closed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR277383X | 1926-09-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB277383A true GB277383A (en) | 1928-05-31 |
Family
ID=8886459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24127/27A Expired GB277383A (en) | 1926-09-13 | 1927-09-13 | Improvements in or relating to electric switches and thermal cut-outs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB277383A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2524438A (en) * | 1949-02-05 | 1950-10-03 | Wilcolator Co | Thermostatic switch for clothes driers |
-
1927
- 1927-09-13 GB GB24127/27A patent/GB277383A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2524438A (en) * | 1949-02-05 | 1950-10-03 | Wilcolator Co | Thermostatic switch for clothes driers |
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