GB672778A - Improvements in or relating to eddy-current switches for controlling electric motors - Google Patents
Improvements in or relating to eddy-current switches for controlling electric motorsInfo
- Publication number
- GB672778A GB672778A GB3116148A GB3116148A GB672778A GB 672778 A GB672778 A GB 672778A GB 3116148 A GB3116148 A GB 3116148A GB 3116148 A GB3116148 A GB 3116148A GB 672778 A GB672778 A GB 672778A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- levers
- pin
- magnet
- lever
- 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
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 2
- 229910052802 copper Inorganic materials 0.000 abstract 2
- 239000010949 copper Substances 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
- H01H3/56—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using electromagnetic clutch
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Motor And Converter Starters (AREA)
Abstract
672,778. Magnetic switches. WATFORD ELECTRIC & MANUFACTURING CO., Ltd. Oct. 26, 1949. [Dec. 1, 1948] No. 31161/48. Class 38 (v). [Also in Group XXXV] An eddy-current switch for reverse-plugging an electric motor is provided with means to prevent the contacts opening until the motor has practically stopped. A copper cup 11 on a shaft 12, driven by the motor, rotates between an iron ring 14 and a magnet 15 pivoted on a shaft 16, whereby the magnet also tends to rotate and a pin 18 thereon moves one of two levers 19 so that its switch arm 21 engages a corresponding contact 22. The levers 19 are displaceably mounted on a rod 28 on an insulating plate 23 and centralised by springs 20 and when a lever is deflected by the pin 18 it is retained by a spring-loaded latch 24 pivoted at .25 and having a step 26 engaging a slot in the lever extremity. The lever 19 thus cannot return to open the contacts 21, 22 until released by the pin 18 engaging the free end of the latch, which action does not occur until the pin has returned to its central position corresponding to a stationary condition of the motor. In an alternative construction, the magnet 15 is driven by the motor and the copper cup 11 operates the levers 19. To increase the force operating the levers by eliminating an air gap, the ring 14 may be mounted on the cup, Fig. 3 (not shown). The latter arrangement forms the subject of Specification 672,859, [Group XXXV].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3116148A GB672778A (en) | 1948-12-01 | 1948-12-01 | Improvements in or relating to eddy-current switches for controlling electric motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3116148A GB672778A (en) | 1948-12-01 | 1948-12-01 | Improvements in or relating to eddy-current switches for controlling electric motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB672778A true GB672778A (en) | 1952-05-28 |
Family
ID=10318934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3116148A Expired GB672778A (en) | 1948-12-01 | 1948-12-01 | Improvements in or relating to eddy-current switches for controlling electric motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB672778A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777445B (en) * | 2009-12-24 | 2012-09-26 | 黄勤飞 | Electromagnetic clutch type drive device |
| CN103400709A (en) * | 2013-08-02 | 2013-11-20 | 乐清市华尊电气有限公司 | Remote control operation mechanism of miniature low-voltage switch |
-
1948
- 1948-12-01 GB GB3116148A patent/GB672778A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101777445B (en) * | 2009-12-24 | 2012-09-26 | 黄勤飞 | Electromagnetic clutch type drive device |
| CN103400709A (en) * | 2013-08-02 | 2013-11-20 | 乐清市华尊电气有限公司 | Remote control operation mechanism of miniature low-voltage switch |
| CN103400709B (en) * | 2013-08-02 | 2016-01-20 | 江门市新会区博格电器实业有限公司 | Remote control operation mechanism of miniature low-voltage switch |
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