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Patent Searching and Data


Title:
CRESCENT LOCK WITH ALARM DEVICE
Document Type and Number:
Japanese Patent JP2009249817
Kind Code:
A
Abstract:

To provide a crescent lock with an alarm device, preventing the position of the alarm device from being easily visually determined since the structure is simple, and having superior crime prevention properties such that a switch cannot be easily operated even if an invader tries to operate the switch.

A reed switch 6 and a cylindrical permanent magnet 5 are stored in an operation lever 4 rotated when a crescent 3 installed on a mounting pedestal 2 attached to an indoor side window frame 1 is rotated, and the cylindrical permanent magnet 5 is moved in association with the rotation of the operation lever 4 to detect by the reed switch 6 that the crescent 3 is unlocked. When the unlocking of the crescent is detected, a signal is sent to an alarm circuit disposed apart from the crescent and an alarm sounds.


Inventors:
TAKASHIGE KAZUO
Application Number:
JP2008000094995
Publication Date:
October 29, 2009
Filing Date:
April 01, 2008
Export Citation:
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Assignee:
NEC TOKIN CORP
International Classes:
E05B45/06; E05B65/08; G08B13/08