GB1259355A - - Google Patents
Info
- Publication number
- GB1259355A GB1259355A GB1933769A GB1259355DA GB1259355A GB 1259355 A GB1259355 A GB 1259355A GB 1933769 A GB1933769 A GB 1933769A GB 1259355D A GB1259355D A GB 1259355DA GB 1259355 A GB1259355 A GB 1259355A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnetic
- contact
- screens
- contact units
- assembly
- 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
- 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
- H01H36/002—Actuation by moving ferromagnetic material, switch and magnet being fixed
Landscapes
- Push-Button Switches (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
1,259,355. Magnetic switches. CREED & CO. Ltd. 16 April, 1969, No. 19337/69. Heading H1N. An assembly of magnetic switches has a polarizing magnet system fixed relative to a plurality of sealed magnetic reed contact units, each of which is associated with a respective coextensive magnetic screen movable to expose one end of the contact unit so as to permit contact operation. As shown, a common permanent magnet 3 acts on any of the contact units 1 when its respective cylindrical screen 4 is moved axially. The screens may be partly supported by the respective contact units and may be selectively moved on operation of keys (not shown) connected by wire or strip to the screens. The common magnet 3 may be replaced by individual magnets or by electromagnets which could be de-energized when the assembly is not in use.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1933769 | 1969-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1259355A true GB1259355A (en) | 1972-01-05 |
Family
ID=10127668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1933769A Expired GB1259355A (en) | 1969-04-16 | 1969-04-16 |
Country Status (6)
Country | Link |
---|---|
US (1) | US3626340A (en) |
JP (1) | JPS4812706B1 (en) |
AU (1) | AU1386270A (en) |
DE (1) | DE2017346A1 (en) |
FR (1) | FR2043377A5 (en) |
GB (1) | GB1259355A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3993988A (en) * | 1975-06-02 | 1976-11-23 | Walter John W | Intrusion detection apparatus to signal movement of a partition |
US5877664A (en) * | 1996-05-08 | 1999-03-02 | Jackson, Jr.; John T. | Magnetic proximity switch system |
US5929731A (en) * | 1996-05-08 | 1999-07-27 | Jackson Research, Inc. | Balanced magnetic proximity switch assembly |
US5874878A (en) * | 1997-04-28 | 1999-02-23 | Jackson, Jr.; John T. | Magnetic proximity switch system with slide-by anti-defeat machanism |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3155792A (en) * | 1962-08-07 | 1964-11-03 | Gen Electric | Magnetic reed switch device |
-
1969
- 1969-04-16 GB GB1933769A patent/GB1259355A/en not_active Expired
-
1970
- 1970-04-10 DE DE19702017346 patent/DE2017346A1/en active Pending
- 1970-04-13 US US27739A patent/US3626340A/en not_active Expired - Lifetime
- 1970-04-14 AU AU13862/70A patent/AU1386270A/en not_active Expired
- 1970-04-15 JP JP45031659A patent/JPS4812706B1/ja active Pending
- 1970-04-15 FR FR7013583A patent/FR2043377A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AU1386270A (en) | 1971-10-21 |
DE2017346A1 (en) | 1970-11-12 |
FR2043377A5 (en) | 1971-02-12 |
JPS4812706B1 (en) | 1973-04-23 |
US3626340A (en) | 1971-12-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |