GB368969A - Improvements in and relating to electric switch operating mechanism - Google Patents
Improvements in and relating to electric switch operating mechanismInfo
- Publication number
- GB368969A GB368969A GB6324/31A GB632431A GB368969A GB 368969 A GB368969 A GB 368969A GB 6324/31 A GB6324/31 A GB 6324/31A GB 632431 A GB632431 A GB 632431A GB 368969 A GB368969 A GB 368969A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- spring
- rod
- motor
- pivot
- 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
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
- H01H3/262—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor using a centrifugal mechanism
Abstract
368,969. Automatic circuit-breakers. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.- (Assignees of Clarke, P. C. ; 200, White Horse Pike, West Collingswood, New Jersey, U.S.A.) Feb. 28, 1931, No. 6324. Convention date, Feb. 28, 1930. [Class 38 (v).] Electric-motor actuation centrifugal actuation. -The movable contacts 3 are lifted into the closed position by a straight-line moving rod 6 acting on member 1 through links and levers having fixed pivots at 9, 14, 17, 22. During closure, a powerful opening-spring 25 is first stressed by means of a motor 23 actuating through a centrifugal device 26 a centrallypivoted lever 27 which is linked to the common pivot of a toggle 29, 29<1> which is in turn connected to a lever 31. The link 29<1> is pivoted at 55 to a lever 30 having a fixed pivot 30<1> and to a link 53 normally held by a trippable toggle 46, 46<1> which can be broken by means of a tripping armature 50 knocking aside a latch 48. Thus the toggle 29, 29<1> is moved to the overset position, where its common pivot abuts a stop 31<1>, and rotates the lever 31 about its pivot 32 and moves the member 36 downwards away from the end 37 of the rod 6, so stressing the spring 25. The motor 23 is then stopped and the motor 24 started, the latter acting through similar toggles to move the rod 6 downwards until members 36, 37 again engage, thereby closing the breaker. The toggle 46, 46<1> can be tripped at any stage of the closing movement to provide a free-handle feature, but to avoid the impact of spring 25 on the rod 6, a shockabsorbing coupler can be interposed between them, Fig. 4. The latter comprises a piston 63 apertured at 64, the rod 62 of which is connected at 67 to the crank 31 and apertured to receive the stem 66 of a valve 65 adapted to close the aperture 64. The piston 63, in closing the switch, moves freely down the cylinder 60, which is secured to the rod 6, the fluid in the cylinder raising the valve 65 to allow this, and the stem 66 engages at the end of its travel with a stop 68 to keep the valve lifted and enable the cylinder to follow the piston. If, however, owing to the free-release operating, the spring 25<1> rises, after a short time the stem leaves the stop 68, so allowing the valve to drop and close the apertures 64. The piston and cylinder then move together to raise the rod 6 and open the switch. In a modified form, Figs. 6-9 (not shown), a single motor is adapted to perform the operations of spring-stressing and circuitclosing, the motor making two similar but independent movements over the same path. In the first movement the motor is coupled to the end of lever 27 to stress the spring, but is prevented by a catch arrangement from engaging the second lever to close the switch until the second movement. The link 53 is dispensed with and the toggle levers 29<1>, 40<1> are both pivoted to the lever 46<1>. In Fig. 10, a motor-driven cam 101 on a shaft 100 first rotates a lever 103 clockwise about its pivot 103<1> to stress the spring 105, the lever 104 remaining stationary. After half a revolution the cam 102 rotates the lever 104 countrclockwise, thereby lowering the stressed spring 105 bodily and lowering the rod 6 to close the switch. During this movement the pivot 104<1> remains held by the tripping lever 106, but may be released at any time by the trip-coil 108 to open the switch.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US432233A US1841090A (en) | 1930-02-28 | 1930-02-28 | Switch operating mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
GB368969A true GB368969A (en) | 1932-03-17 |
Family
ID=23715298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB6324/31A Expired GB368969A (en) | 1930-02-28 | 1931-02-28 | Improvements in and relating to electric switch operating mechanism |
Country Status (3)
Country | Link |
---|---|
US (1) | US1841090A (en) |
DE (1) | DE632302C (en) |
GB (1) | GB368969A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2909629A (en) * | 1957-07-02 | 1959-10-20 | Ite Circuit Breaker Ltd | Motor spring operating mechanism for oil circuit breakers |
-
1930
- 1930-02-28 US US432233A patent/US1841090A/en not_active Expired - Lifetime
- 1930-03-23 DE DEA60910A patent/DE632302C/en not_active Expired - Lifetime
-
1931
- 1931-02-28 GB GB6324/31A patent/GB368969A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1841090A (en) | 1932-01-12 |
DE632302C (en) |
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