GB286268A - Improvements in electrical switches - Google Patents
Improvements in electrical switchesInfo
- Publication number
- GB286268A GB286268A GB5956/28A GB595628A GB286268A GB 286268 A GB286268 A GB 286268A GB 5956/28 A GB5956/28 A GB 5956/28A GB 595628 A GB595628 A GB 595628A GB 286268 A GB286268 A GB 286268A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- spring
- plates
- pivoted
- 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
- 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
- H01H5/04—Energy stored by deformation of elastic members
- H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
Landscapes
- Tumbler Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
286,268. Welsh, J. T. March 2, 1927. [Convention date]. Switches, quick-action; actuating; contacts.- The movable contact 3 is carried by an arm 14 that is pivoted at 16 to a lever 4 which is pivoted in notches 26 in a bracket 5 comprising stamped plates 24. The lever 4 comprises a pair of stamped plates which are positioned by the pin 16 and a lever 12 forming with the lever 4 a toggle device. The contact arm 14 is connected by a dead-centre spring 11 with arms 48 forming parts of a two-plate lever 43, which is pivoted at one end and carries a roller 9 engaging a cam 7 whereby the switch is operated. The arm 14 is connected by a lead 22 to a block 27 which carries guides 37 for the leads and also serves as a support for the plates 24. When it is desired to open the circuit, the cam 7 is rotated, as by a handle, in a counter-clockwise direction whereby the rollers 9 and lever 43 are lifted and the arms 48 projected between the plates of the lever 4 so as to cause the spring to cross the dead-centre and rapidly open the switch. A similar action takes place in the reverse direction, and a pair of ends 47 impart a hammer action to the lever 4 in case of failure of the spring. The spring also causes a rolling action of contact 3 on its fixed contact.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US172040A US1753975A (en) | 1927-03-02 | 1927-03-02 | Control apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB286268A true GB286268A (en) | 1928-12-20 |
Family
ID=22626118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5956/28A Expired GB286268A (en) | 1927-03-02 | 1928-02-25 | Improvements in electrical switches |
Country Status (2)
Country | Link |
---|---|
US (1) | US1753975A (en) |
GB (1) | GB286268A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2481260A (en) * | 1945-06-19 | 1949-09-06 | Jr Adolph Edward Thurber | Elevator leveling device |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2555168A (en) * | 1944-03-23 | 1951-05-29 | Mcgraw Electric Co | Circuit breaker |
US2658977A (en) * | 1948-05-08 | 1953-11-10 | Electrical Eng Equipment Co | Electrical load break switch |
US2794086A (en) * | 1954-06-09 | 1957-05-28 | Barrett Keenan Company | Toggle switch construction |
BE550863A (en) * | 1955-09-07 | |||
US2862075A (en) * | 1957-12-09 | 1958-11-25 | Gen Electric | Overcenter spring operating mechanism for an electric circuit breaker |
US3383485A (en) * | 1967-02-23 | 1968-05-14 | Gen Electric | Cam actuated switch mechanism provided with an actuator link having an extesnion forterminating wiping action |
US3562454A (en) * | 1969-07-11 | 1971-02-09 | Chance Co Ab | Positive switch contact operating mechanism for underground switch |
-
1927
- 1927-03-02 US US172040A patent/US1753975A/en not_active Expired - Lifetime
-
1928
- 1928-02-25 GB GB5956/28A patent/GB286268A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2481260A (en) * | 1945-06-19 | 1949-09-06 | Jr Adolph Edward Thurber | Elevator leveling device |
Also Published As
Publication number | Publication date |
---|---|
US1753975A (en) | 1930-04-08 |
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