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Title:
CRESCENT LOCK WITH CRIME PREVENTING FUNCTION, AND CRIME PREVENTION SYSTEM USING THE CRESCENT LOCK
Document Type and Number:
Japanese Patent JP2005036572
Kind Code:
A
Abstract:

To provide a crescent lock easily replacing an existing crescent lock, capable of detecting a breaking act of window glass and unlocking of the crescent lock, and rotatable to lock only when a locking piece mounted to a window frame is in a lockable position.

This crescent lock 10 is provided with a crescent base 12 mountable to the window frame 50, a crescent 16 rotatably mounted to the crescent base, and a crescent handle 18 mounted to a rotating shaft 14 to rotate the crescent. The crescent handle holds inside a sensor 20 capable of detecting both the breaking act of window glass and the rotating act of the crescent handle; a microcomputer 22 recognizing that the breaking act of window glass or the rotating act of the crescent handle was performed, based on signals from the sensor; a communication circuit 24 provided with a transmitting part for transmitting an alarm signal through radio wave when the breaking act of window glass or the rotating act of the crescent handle is recognized; and a battery 26 for supplying power to the sensor, microcomputer and communication circuit.


Inventors:
YAMADA HIRONOBU
IMANARI MURAHITO
YAMAKI MONJIYU
Application Number:
JP2003000276362
Publication Date:
February 10, 2005
Filing Date:
July 17, 2003
Export Citation:
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Assignee:
MARUBENI ITOCHU TECHNO STEEL C
AKEBONO BRAKE IND
International Classes:
E05B45/06; E05B65/08; (IPC1-7): E05B45/06; E05B65/08
Attorney, Agent or Firm:
八田 幹雄
野上 敦
奈良 泰男
齋藤 悦子
宇谷 勝幸
藤井 敏史