Seismic sensor controlled door unlocking system
First Claim
Patent Images
1. A door lock control system, comprising:
- a door mounted in a door frame;
a door lock associated with the door to lock and unlock the door;
control means to lock and unlock the door lock; and
, a vibration sensor associated with the control means, the control means causing the door lock to be unlocked when a vibration above a certain level is sensed by the vibration sensor.
0 Assignments
0 Petitions
Accused Products
Abstract
A seismic sensor controlled door unlocking system which has a vibration sensor and a control system. The vibration sensor is configured to detect heavy vibrations such as those made by an earthquake. The control system maintains the locked state of, and has the ability to unlock, a door to which it is connected. Upon detection of a large vibration by the vibration sensor, the control system unlocks the door.
21 Citations
24 Claims
-
1. A door lock control system, comprising:
-
a door mounted in a door frame;
a door lock associated with the door to lock and unlock the door;
control means to lock and unlock the door lock; and
,a vibration sensor associated with the control means, the control means causing the door lock to be unlocked when a vibration above a certain level is sensed by the vibration sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of controlling a lock on a door, comprising the steps of:
-
maintaining a door in a locked state;
monitoring for vibrations near the door;
determining if the monitored vibration is above a certain level; and
,unlocking the door if the vibrations is above the certain level. - View Dependent Claims (10, 11, 13, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
-
12. A control box, comprising:
-
a box;
a door hinged to the box;
a DC power supply mounted in the box;
a backup battery mounted in the box;
a terminal and fuse board mounted in the box; and
,a vibration sensor mounted in the box.
-
-
14. A vibration sensor, comprising;
-
a hollow body;
a top plate mounted to a top of the body;
a pendulum attached to the top plate;
a permanent magnet attached to the pendulum;
a bottom plate mounted to a bottom of the body;
a magnetic contact switch mounted to the bottom plate;
a weight displaceable along the pendulum;
a marking on the weight; and
,a scale on the body, the marking and the scale forming a means to determine a position of the weight along the pendulum.
-
Specification