Title:
CYLINDER LOCK WITH ADDITIONAL CONTACT FOR THEFT PREVENTION
Document Type and Number:
Japanese Patent JPH02266075
Kind Code:
A
Abstract:
PURPOSE: To improve a theft preventing effect by a method wherein contacts opened or closed through the motion of a cylinder cut piece are provided in a cylinder lock.
CONSTITUTION: When a cylinder cut piece 4 is rotated by a proper key in a state that it is retracted in an inner cylinder 3, contacts 5a and 5b are closed. When the cylinder out piece 4 is rotated by a minus driver in a state it is protruded from the inner cylinder 3, the tip part of the cut piece 4 is broken, and the contacts 5a and 5b are not energized.
Inventors:
KAWADA TSUNEKICHI
Application Number:
JP30935288A
Publication Date:
October 30, 1990
Filing Date:
December 07, 1988
Export Citation:
Assignee:
KAWADA TSUNEKICHI
International Classes:
E05B45/08; (IPC1-7): E05B45/08