GB892336A - Improvements in and relating to speed responsive switch actuating mechanisms - Google Patents
Improvements in and relating to speed responsive switch actuating mechanismsInfo
- Publication number
- GB892336A GB892336A GB17687/58A GB1768758A GB892336A GB 892336 A GB892336 A GB 892336A GB 17687/58 A GB17687/58 A GB 17687/58A GB 1768758 A GB1768758 A GB 1768758A GB 892336 A GB892336 A GB 892336A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- spring
- contacts
- slider
- lugs
- 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
- H01H35/00—Switches operated by change of a physical condition
- H01H35/06—Switches operated by change of speed
- H01H35/10—Centrifugal switches
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/23—Mechanically-actuated centrifugal switches
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Centrifugal Separators (AREA)
Abstract
892,336. Centrifugal switches. ENGLISH ELECTRIC CO. Ltd. June 2, 1959 [June 3, 1958], No. 17687/58. Class 38 (5). A speed-responsive switch for an electric motor comprises a bush 14 secured to the rotor shaft 15 and carrying a spring-steel frame 11 provided with four resilient lugs 12 having notches 13 to receive lugs 16 of a thin spring- plate 10 which is held in a bowed condition as shown, when the motor is stationary. The spring-plate 10 has an elongated central clearance hole and is loosely attached to an annular slider 19 by means of grooves 21 in lugs 20. The slider 19 engages a rubbing plate 22 to hold a contact 24 on an insulated spring-strip 23 mounted on the motor end-plate (not shown) against a fixed contact 25, the plate 23 being biased to the contacts-open position. Weights 18 are attached to the ends 17 of spring-plate 10 and when the shaft 15 rotates centrifugal force causes the weights 18 to exert a bending moment about notches 13 until at a predetermined speed the centre part of spring- plate 10 snaps over to allow contacts 24, 25 to open (Fig. 2, not shown). The initial movement of the spring-plate 10 is followed up by the springiness of strip 23 such that contacts 24, 25 do not open until the snap-over occurs. The slider 19 abuts bush 14 to stop the plate 10 attaining a stable reversed position and when the speed falls below another predetermined value the plate automatically snaps back to the position shown in Fig. 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB17687/58A GB892336A (en) | 1958-06-03 | 1958-06-03 | Improvements in and relating to speed responsive switch actuating mechanisms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB17687/58A GB892336A (en) | 1958-06-03 | 1958-06-03 | Improvements in and relating to speed responsive switch actuating mechanisms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB892336A true GB892336A (en) | 1962-03-28 |
Family
ID=10099451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17687/58A Expired GB892336A (en) | 1958-06-03 | 1958-06-03 | Improvements in and relating to speed responsive switch actuating mechanisms |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB892336A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4027316A (en) * | 1974-04-26 | 1977-05-31 | Agfa-Gevaert A.G. | Apparatus for delayed firing of electronic flash units or the like |
| CN103151192A (en) * | 2012-12-25 | 2013-06-12 | 苏州君丰辰电子科技有限公司 | Insulation fixing plate for automatic transfer switch |
| CN103258685A (en) * | 2012-12-25 | 2013-08-21 | 苏州君丰辰电子科技有限公司 | Automatic change-over switch device |
-
1958
- 1958-06-03 GB GB17687/58A patent/GB892336A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4027316A (en) * | 1974-04-26 | 1977-05-31 | Agfa-Gevaert A.G. | Apparatus for delayed firing of electronic flash units or the like |
| CN103151192A (en) * | 2012-12-25 | 2013-06-12 | 苏州君丰辰电子科技有限公司 | Insulation fixing plate for automatic transfer switch |
| CN103258685A (en) * | 2012-12-25 | 2013-08-21 | 苏州君丰辰电子科技有限公司 | Automatic change-over switch device |
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