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Auto security system with two-stage disarming
| Details |
Inventors: Hwang, Shih M.;
Assignee:
Primary Examiner: Swarthout; Brent A.
Assistant Examiner: Ting; Nina
Attorney, Agent or Firm: Bacon & Thomas
A vehicle alarm system with two-stage disarming consists of a remote control unit, a receiver-decoder unit, a Central Processing Unit (CPU). When the alarm system is armed, the CPU continues to monitor the signals transmitted from the receiver-decoder unit. If no attack is made on the vehicle or no triggering signal is detected by the alarm system, pressing the remote control unit one time will disarm the alarm. When a triggering signal is detected, the siren will sound immediately and the signal lights will flash continuously. To turn off the siren and signal lights, the remote control unit can be pressed one time while the alarm system is continuously and fully armed. If the burglar goes on stealing the vehicle, the siren will sound and the parking lights will flash again as well as that the engine start is disabled. Such full protection remains until the car owner comes back to press the remote control unit twice to deactivate, the alarm. |
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DETAILED DESCRIPTION The main objective of this invention is to provide an alarm system with two-stage disarming, which secures the vehicle when it is disarmed while the owner is within sight of but far away from the vehicle.
When the alarm system is triggered, first of all, a remote unit can be pressed one time to turn off the siren and signal lights only while the alarm system remains fully armed.
This means that the siren and signal lights can still be activated if the alarm system is triggered thereafter.
If the burglar goes on stealing the vehicle, the siren will sound and the parking lights will flash again as well as that the engine start is disabled.
Such full protection remains until the car owner comes back to press the remote control unit twice to deactivate the alarm.
This newly invented alarm system with two-stage disarming consists of a remote control unit, a receiver-decoder unit, a central processing unit (CPU), and an amplifier.
When the alarm system is armed, the CPU control unit continues to monitor the signals transmitted from the receiver-decoder unit.
If no attack is made to the vehicle or no triggering signal is detected by the alarm system, pressing the remote control unit one time will disarm the alarm.
And, once the remote control unit is pressed, a signal will be transmitted from the remote control unit to the receiver-decoder unit, which decodes the signal and sends it to the CPU.
However, when a triggering signal is detected, the siren will sound loudly and immediately and the signal lights will flash continuously in order to catch people's attention nearby and scare off any intruder.
To turn off the siren and signal lights, the car owner can press the remote control unit one time while the alarm system is continuously and fully armed.
But if the burglar goes on stealing the vehicle and the triggering signals are detected, the siren will sound and the parking lights will flash again as well as the engine starter is disabled, i.
e.
the alarm system is still fully armed even the vehicle is intruded several times
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