Title:
MAGNETIC SWITCH ASSEMBLY
Document Type and Number:
WIPO Patent Application WO2004027797
Kind Code:
A3
Abstract:
An improved magnetic switch (10) is provided which is designed for use in an alarm circuit (52) in order to detect relative movement between first and second members such as a door (14) and frame (12), so as to signal unauthorized opening of the door (14). The switch (10) includes a switch assembly (20) for mounting in frame (12) and having first and second switch elements (40, 42), an electrically conductive, shiftable body (44) adjacent the elements (40, 42), and a first attractive component (45). Additionally, the switch (10) has a second attractive component (22) for mounting to the door (14). In use when door (14) is closed and circuit (52) is armed, the magnetic attraction between body (44) and component (22) shifts the body (44) to a switch position where the body (44) is out of simultaneous contact with the switch elements (40, 42). If the door (14) is opened, the magnetic attraction between body (44) and component (45) moves the body to another switch position establishing simultaneous contact with the switch elements (40, 42).
Inventors:
COLLINS JOHN M (US)
Application Number:
PCT/US2003/028687
Publication Date:
May 06, 2004
Filing Date:
September 10, 2003
Export Citation:
Assignee:
MAGNASPHERE CORP (US)
COLLINS JOHN M (US)
COLLINS JOHN M (US)
International Classes:
H01H36/00; H01H3/16; (IPC1-7): H01H9/00
Foreign References:
| US5877664A | 1999-03-02 | |||
| US5977873A | 1999-11-02 |
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