DEVICE FOR SIGNALING ABOUT OPENING OF OBJECT Russian patent published in 2006 - IPC G08B13/08 

FIELD: engineering of signaling devices, possible use for signaling about opening of a lid, hatch, door.

SUBSTANCE: device includes a body and signal sensor, made in form of reed and magnet, longitudinal axis is immovably mounted in the body, on which with possible axial movement a bushing is positioned, on front end of which first circular magnet is immovably held with a magnetic screen mounted on it, while on back end of bushing second circular magnet is mounted, and inside the axis a hollow is located, wherein a reed is mounted with clamps, projecting outside the body. Circular magnet in case of weakening of interaction with ferromagnetic part of object sets the bushing with circular magnets to position of balance, at which magnetic induction becomes equal to zero and magnetic contacts of reed are disconnected.

EFFECT: increased reliability of operation, decreased dimensions.

8 cl, 2 dwg