GB1139143A - Magnetic devices including a contact unit - Google Patents
Magnetic devices including a contact unitInfo
- Publication number
- GB1139143A GB1139143A GB4293866A GB4293866A GB1139143A GB 1139143 A GB1139143 A GB 1139143A GB 4293866 A GB4293866 A GB 4293866A GB 4293866 A GB4293866 A GB 4293866A GB 1139143 A GB1139143 A GB 1139143A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reeds
- magnet
- contact
- contacts
- disc
- 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
- H01H51/00—Electromagnetic relays
- H01H51/28—Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
- H01H36/0006—Permanent magnet actuating reed switches
- H01H36/0013—Permanent magnet actuating reed switches characterised by the co-operation between reed switch and permanent magnet; Magnetic circuits
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Abstract
1,139,143. Magnetic switches. G. B. JEFFERY. 9 Oct., 1967 [26 Sept., 1966], No. 42938/66. Heading H1N. A movable magnet switch such as that described in Specification 1,115,966, has its movable magnet member arranged so as to actuate magnetic contacts to their closed position and during subsequent movement, provide a reduced magnetic field to retain the contacts closed. In Fig. 1, the contact reeds 2 are not magnetized when the surface 9 of the magnet 3 is adjacent the reeds but are magnetized to close the contacts when passed by a magnet projection 7 or 8, in accordance with the direction of rotation of the disc magnet 3. The surface 4 of the disc 3 between projections 7 and 8 is sufficiently near to the reeds 2 to provide a contact holding flux. The contact reeds are enclosed in glass envelopes (not shown) and the magnet disc passes adjacent the reeds, and not merely the envelope thereof. A rotary switch having six reed contact units as shown may act as a three phase stepping switch.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4293866A GB1139143A (en) | 1966-09-26 | 1966-09-26 | Magnetic devices including a contact unit |
US640092A US3477047A (en) | 1966-09-22 | 1967-05-22 | Rotary switches |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4293866A GB1139143A (en) | 1966-09-26 | 1966-09-26 | Magnetic devices including a contact unit |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1139143A true GB1139143A (en) | 1969-01-08 |
Family
ID=10426622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4293866A Expired GB1139143A (en) | 1966-09-22 | 1966-09-26 | Magnetic devices including a contact unit |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1139143A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE30928E (en) | 1977-06-23 | 1982-05-11 | Caterpillar Tractor Co. | Engine control |
-
1966
- 1966-09-26 GB GB4293866A patent/GB1139143A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE30928E (en) | 1977-06-23 | 1982-05-11 | Caterpillar Tractor Co. | Engine control |
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