Magnetic switch assembly
US6603378B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 2002 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Sep 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2036/0086
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.