| 摘要 |
FIELD: property protection. ^ SUBSTANCE: device can be used for blocking doors, windows, garage gates, railway containers, railway wagons and other elements made of magnetic-active materials of buildings and constructions in case of opening or displacement with output of alarming signal by switching contacts of reed switch to control device, concentrator or centralized observation station. Device has reed switch and magnet, the latter mounted in same body for fixed position at protected structure. Response portion of device is the very moving protected structure (metallic door, etc.). ^ EFFECT: higher reliability. ^ 3 cl, 1 dwg |
