US4835514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Car theft alarm system
Assignee: Denso Corp
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Filing: 1987-04-27
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Granted: 1989-05-30
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Expires: 2007-04-27
Abstract
Abstract An antitheft system comprises a prohibition device for prohibiting the alarming operation upon receipt of a disarmed memory signal. When an arming signal is inputted, an alarm is generated on the receipt of a theft detection signal generated by handling or operation of vehicle equipment or accessories. When a disarming signal is received, on the other hand, it is sotred and held as the disarmed memory signal in power-supply disconnected state.
Inventors
- 👤 Mitsuhiko Masegi
- 👤 Masao Sakurai
- 👤 Makoto Aso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:51
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/10; B60R25/1018
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
173 words
An antitheft system for a vehicle comprising: an alarm device mounted on said vehicle; theft detection means for detecting a theft act associated with said vehicle; and a control means supplied with power without passing through an ignition switch from a battery mounted on the vehicle for actuating the alarm device upon detection of the theft act by the theft detection means, said control means including: setting means for setting the control means in an armed mode and resetting said control means in a disarmed mode, memory means for storing one of the armed and disarmed modes regardless of termination of power from the battery, power supply start detection means for detecting an initial supply of power from the battery and generating a pulse signal temporarily, and alarm signal generating means for identifying the pulse signal from the power supply start detection means and generating an alarm signal for actuating the alarm device regardless of the detection condition of said theft detection means when the armed mode is stored in said memory means.
Claim 2
Dependent Claim
173 words
An antitheft system for a vehicle comprising: an alarm device mounted on said vehicle; theft detection means for detecting a theft act associated with said vehicle; and a control means supplied with power without passing through an ignition switch from a battery mounted on the vehicle for actuating the alarm device upon detection of the theft act by the theft detection means, said control means including: setting means for setting the control means in an armed mode and resetting said control means in a disarmed mode, memory means for storing one of the armed and disarmed modes regardless of termination of power from the battery, power supply start detection means for detecting an initial supply of power from the battery and generating a pulse signal temporarily, and alarm signal generating means for identifying the pulse signal from the power supply start detection means and generating an alarm signal for actuating the alarm device regardless of the detection condition of said theft detection means when the armed mode is stored in said memory means.
Claim 3
Dependent Claim
17 words
An antitheft system according to claim 1, wherein said memory means includes a capacitor for storing charges.
Claim 4
Dependent Claim
36 words
An antitheft system according to claim 1, wherein said theft detection means includes a theft detection switch for turning on when at least one of doors, trunk, and engine hood provided for said vehicle is open.
Claim 5
Dependent Claim
29 words
An antitheft system according to claim 1, wherein said setting means is operated manually to set or reset the control device in the armed mode or the disarmed mode.
Claim 6
Dependent Claim
23 words
An antitheft system according to claim 1, wherein said alarm signal generating means generates said alarm signal for a predetermined period of time.
Claim 7
Dependent Claim
230 words
An antitheft system for a vehicle comprising: an alarm device mounted on said vehicle; theft detection means for detecting a theft act associated with said vehicle; and a control device supplied with power without passing through an ignition switch from a battery mounted on the vehicle for actuating the alarm device upon detection of the theft act by the theft detection means, said control device including: manual manipulation means for setting said control device in armed mode and resetting said control device in disarmed mode, memory means for storing one of the armed and disarmed modes, said memory means having a capacitor and a charging and discharging circuit, one of a charging operation and a discharging operation of said charging and discharging circuit being controlled in accordance with the mode set by said manual manipulation means so that a charge accumulating condition of said capacitor is set, power supply start detection means for detecting a recovery from intentional disconnection of power to said control device from a battery mounted on said vehicle and for generating a pulse signal for a predetermined time, and alarm signal generating means for identifying the pulse signal from the power supply start detection means and for generating an alarm signal for actuating the alarm device regardless of the detection condition of said theft detection means when the armed mode is stored in said memory means.
Claim 8
Dependent Claim
230 words
An antitheft system for a vehicle comprising: an alarm device mounted on said vehicle; theft detection means for detecting a theft act associated with said vehicle; and a control device supplied with power without passing through an ignition switch from a battery mounted on the vehicle for actuating the alarm device upon detection of the theft act by the theft detection means, said control device including: manual manipulation means for setting said control device in armed mode and resetting said control device in disarmed mode, memory means for storing one of the armed and disarmed modes, said memory means having a capacitor and a charging and discharging circuit, one of a charging operation and a discharging operation of said charging and discharging circuit being controlled in accordance with the mode set by said manual manipulation means so that a charge accumulating condition of said capacitor is set, power supply start detection means for detecting a recovery from intentional disconnection of power to said control device from a battery mounted on said vehicle and for generating a pulse signal for a predetermined time, and alarm signal generating means for identifying the pulse signal from the power supply start detection means and for generating an alarm signal for actuating the alarm device regardless of the detection condition of said theft detection means when the armed mode is stored in said memory means.
Claim 9
Dependent Claim
23 words
An antitheft system according to claim 6, wherein said alarm signal generating means generates said alarm signal for a predetermined period of time.
Claim 10
Dependent Claim
43 words
An antitheft system according to claim 6, wherein said alarm signal generating means generates the alarm signal regardless of whether said control device is in a set condition or a reset condition when a detection signal is received from said theft detection means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |