GB620962A - Improvements in multipole electric switches - Google Patents
Improvements in multipole electric switchesInfo
- Publication number
- GB620962A GB620962A GB338047A GB338047A GB620962A GB 620962 A GB620962 A GB 620962A GB 338047 A GB338047 A GB 338047A GB 338047 A GB338047 A GB 338047A GB 620962 A GB620962 A GB 620962A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- cam
- spindle
- switch
- strip
- 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
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
- H01H19/60—Angularly-movable actuating part carrying no contacts
- H01H19/62—Contacts actuated by radial cams
Landscapes
- Push-Button Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
620,962. Snap-action switches. CRABTREE & CO., Ltd., J, A., and HILL, W. E. Feb. 5, 1947. No. 3380. [Class 38(v)] A multipole switch comprises a number of similar switch units each operated by a cam, the cams being mounted on a hand actuated spindle which has a snap-action arrangement. Each switch unit consists of an insulating 'box c having two fixed strip contacts h, h' the under-surfaces of which are engaged by contacts o on a contact strip p, which is pressed upwardly by helical springs r, r' of unequal strength. The contact boxes c are spigoted in and secured to a bracket a having upturned ends a<SP>1</SP>, a<SP>2</SP>, which support a spindle b on which is a moulded insulating sleeve u having cam formations u<SP>1</SP>. When the spindle is turned each cam u<SP>1</SP> presses on a strip p displacing one end of it against the weaker spring r'. If the contacts at this end have become welded, the other end of the strip p is displaced against the stronger spring r to open the contacts at that end. The snap action is provided by a two-lobed cam v, Fig. 5, on which a spring urged roller y<SP>1</SP> bears ; the contacts being closed rapidly due to the impetus obtained as the roller runs down the steeper side of one lobe. A stop x<SP>1</SP> co-operating with this cam v limits the rotation of the spindle. When this switch is used as an isolating switch in conjunction with a motor starting contactor, one of the cams u' may be forwardly disposed so as to open the contactor coil circuit before the other isolating switch contacts open.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB338047A GB620962A (en) | 1947-02-05 | 1947-02-05 | Improvements in multipole electric switches |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB338047A GB620962A (en) | 1947-02-05 | 1947-02-05 | Improvements in multipole electric switches |
Publications (1)
Publication Number | Publication Date |
---|---|
GB620962A true GB620962A (en) | 1949-04-01 |
Family
ID=9757229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB338047A Expired GB620962A (en) | 1947-02-05 | 1947-02-05 | Improvements in multipole electric switches |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB620962A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2894080A (en) * | 1956-12-24 | 1959-07-07 | Ite Circuit Breaker Ltd | 100 ampere disconnect push switch |
-
1947
- 1947-02-05 GB GB338047A patent/GB620962A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2894080A (en) * | 1956-12-24 | 1959-07-07 | Ite Circuit Breaker Ltd | 100 ampere disconnect push switch |
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