Alarm system

• US 20050253705A1
• Filed: 05/12/2005
• Published: 11/17/2005
• Est. Priority Date: 05/17/2004
• Status: Active Grant

• Current Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
• Original Assignee: Mitsubishi Jidosha Kogyo Kabushiki Kaisha
• Inventors: Hara, Tohru, Yamazaki, Toshihiko
• Granted Patent: US 7,295,102 B2
• Time in Patent Office: Days
• US Class Current: 340/539.130
• CPC Class Codes: B60R 25/1003 Alarm systems characterised by arm or disarm features

Abstract

When an alarm switch of a transmitter is given a long press carried out for one or more seconds in a timer-reset condition, a first alarm reversal signal is transmitted simultaneously with the setting (starting) of the timer. If the alarm switch is pressed within the set time of the timer regardless of a press time period, a second alarm reversal signal is transmitted, and the timer is reset. On a receiver side, the activation and deactivation of the alarm is alternately performed upon receipt of each alarm reversal signal.

Claims

1. An alarm system that receives, by means of a receiver, a signal transmitted from a transmitter in accordance with operation of an operation member, and activates or deactivates an alarm in response to the received signal, comprising:

a transmission controller disposed on said transmitter side for transmitting an Activate signal predetermined as an Alarm-ON command to said receiver when said operation member is operated in a first operation mode in an initial condition thereof and for transmitting a Deactivate signal predetermined as an Alarm-OFF command to said receiver when said operation member is operated in a second operation mode before a prescribed time period expires after said transmission of said Activate signal, the transmission controller returning to said initial condition after sending said Deactivate signal; and

a reception controller disposed on said receiver side for activating an alarm upon receipt of said Activate signal and for deactivating said alarm upon receipt of said Deactivate signal while said alarm is ON.

2. The alarm system according to claim 1, wherein:

said reception controller deactivates said alarm regardless of the presence or absence of said Deactivate signal when said prescribed time period expires after the activation of said alarm; and

said transmission controller returns to said initial condition when said prescribed time period expires without said operation member'"'"'s being operated in said second operation mode after the transmission of said Activate signal.

3. The alarm system according to claim 1, wherein:

either one of said first operation mode and said second operation mode means that said operation member is consecutively operated over a time period that equals to a prescribed operation time or more, and the other means that said operation member is operated regardless of the operation time of said operation member.

4. The alarm system according to claim 1, wherein:

said alarm system is applied to a vehicle.

5. The alarm system according to claim 4, wherein:

said transmitter is integrally installed in a keyless entry transmitter.

6. The alarm system according to claim 4, wherein:

said receiver implements said alarm by activating a horn of said vehicle.

7. The alarm system according to claim 4, wherein:

said receiver implements said alarm by activating headlights of said vehicle.

8. The alarm system according to claim 1, wherein:

said Activate signal and said Deactivate signal are wireless signals.

9. The alarm system according to claim 8, wherein:

said Activate signal and said Deactivate signal are radio wave signals.

10. The alarm system according to claim 8, wherein:

said Activate signal and said Deactivate signal are infrared signals.