GB711751A - Improvements in and relating to directional electric switches - Google Patents
Improvements in and relating to directional electric switchesInfo
- Publication number
- GB711751A GB711751A GB17023/52A GB1702352A GB711751A GB 711751 A GB711751 A GB 711751A GB 17023/52 A GB17023/52 A GB 17023/52A GB 1702352 A GB1702352 A GB 1702352A GB 711751 A GB711751 A GB 711751A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- closed
- switch
- contact
- predetermined speed
- 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)
- Stopping Of Electric Motors (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
711,751. Centrifugal switches; actuation of switches; control of A.C. motors. GENERAL ELECTRIC CO. July 7, 1952 [July 5, 1951], No. 17023/52. Classes 38(3) and 38(5) A switch for controlling an instantly reversible single-phase A.C. motor comprises a pair of independently movable contact arms, one on either side of the motor shaft, biased to the closed position by a centrifugal mechanism below a predetermined speed and being allowed to move to the " open" position when the predetermined speed is reached, one or other of the arms being held in the first position by a device responsive to the direction of rotation. The centrifugal mechanism, which may be that of Specification 504,678, acts on an axially-movable sleeve 12 which engages wear pads 22 on the free ends of the contact arms 20, 21 which are mounted on a plate 17. The sleeve 12 is moved to the left, Fig. 2, below the predetermined speed so that contact pairs. 23, 26 and 24, 27 are closed. Each contact arm 20, 21 has a hook 34 or 35 respectively lying in the path of hooks 32, 33 secured to the outer race 30 of an anti-friction bearing, the inner race 29 of which is secured to the shaft 3.' Assuming a selector switch 39 to be in the position shown in Fig. 6, the motor rotates in the direction of the arrow 36, Fig. 3, with the contact pairs closed until the predetermined speed is reached. At this speed, the sleeve 12 is moved to the right, Fig. 2, thereby permitting movement of arms 20, 21 to the right. However, due to movement of the outer race 30 in the direction of the arrow 37. due to the anti-friction elements 31, the hook 32 is engaged with hook 34 so that the arm 20 is retained in its closed position. Movement of arm 21 opens contacts 24, 27 and disconnects the motor starting winding 5. Although contacts 23, 26 are held closed, the circuit is broken at the contact 38 of the switch 39 and is only made when the switch 39 is changed over when it is desired to reverse the motor. When this happens, the winding 5 is energized in the reverse direction to slow down the motor which stops and then re-starts in the opposite direction. Contacts 24, 27 are re-closed as the motor slows down and are held closed by the engagement of hooks 33, 35, due to movement of race 30 in the direction opposite to that shown by arrow 37. Contacts 23, 26, however, open when the motor speeds up and the winding 5 is cut out again. The circuit is then ready for reversal of switch 39 again.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US235326A US2598440A (en) | 1951-07-05 | 1951-07-05 | Directional switch |
Publications (1)
Publication Number | Publication Date |
---|---|
GB711751A true GB711751A (en) | 1954-07-07 |
Family
ID=22885027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17023/52A Expired GB711751A (en) | 1951-07-05 | 1952-07-07 | Improvements in and relating to directional electric switches |
Country Status (2)
Country | Link |
---|---|
US (1) | US2598440A (en) |
GB (1) | GB711751A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2673319A (en) * | 1952-02-13 | 1954-03-23 | Gen Motors Corp | Motor reversing mechanism |
US2673262A (en) * | 1952-10-30 | 1954-03-23 | Gen Motors Corp | Motor reversing mechanism |
US2767274A (en) * | 1953-09-02 | 1956-10-16 | George D Ritter | Starting winding mechanism for electric motor |
US2748332A (en) * | 1954-01-04 | 1956-05-29 | Gen Electric | Reversing motor circuit |
US2850592A (en) * | 1955-08-10 | 1958-09-02 | In Sink Erator Mfg Company | Reversible motor and switch for garbage disposal units |
US2852637A (en) * | 1956-04-02 | 1958-09-16 | Guardian Electric Mfg Co | Solenoid relay |
US3157762A (en) * | 1961-08-30 | 1964-11-17 | Gen Electric | Speed responsive switch arrangement for use in controlling winding circuits of single phase reversible electric motors |
US3172973A (en) * | 1962-02-28 | 1965-03-09 | Jab Company Inc | Direction sensing speed responsive switch |
FR1483754A (en) * | 1966-01-17 | 1967-06-09 | Dev D App Electro Mecaniques S | Safety device for machines with a rotating part |
US3601675A (en) * | 1970-07-09 | 1971-08-24 | Ickes Braun Glasshouses Inc | Ventilator controller for a greenhouse |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US627326A (en) * | 1899-06-20 | John l | ||
US931613A (en) * | 1906-05-05 | 1909-08-17 | Dugald C Jackson | Train-lighting system. |
-
1951
- 1951-07-05 US US235326A patent/US2598440A/en not_active Expired - Lifetime
-
1952
- 1952-07-07 GB GB17023/52A patent/GB711751A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2598440A (en) | 1952-05-27 |
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