US4053869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burglar alarm system
Assignee: Individual
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Filing: 1976-05-12
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Granted: 1977-10-11
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Expires: 1996-05-12
Abstract
Abstract A protective alarm system for a vehicle or the like wherein a protective switch initiates operation of a circuit combining two timing effects : effecting time delaying of an alarm device, and determining the duration of the alarm. Once initiated by the protective switch, the alarm is actuated after a predetermined delay and for a predetermined duration despite any action on the switch such as a periodical opening and closing. Circuitry operated by a key switch defeats instantaneously actuation of the alarm system when a further manually operated knob is on, which results in a necessary order of operation, involving the possession of the key, to inhibit definitely the alarm.
Inventors
- 👤 Charles Quercia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:14
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/10; B60R25/1003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
236 words
An alarm system for use in a vehicle to detect unauthorized entry into the vehicle, comprising: A. a first switch means positioned to be operated when a door of the vehicle is opened, B. a key-operated switch means having at least first and second switch conditions, normally being in the first condition when the vehicle is empty, and adapted to be placed in the second condition by insertion and operation of a key, C. a two-position switch means which is manually operable between first and second switch positions, D. alarm means for giving an alarm when operated, E. disabling means operative only when the key-operated switch is in the second condition and responsive to placement of the two-position switch in the second switch position for disabling the alarm system, F. first delay means, operative only when the two-position switch is in the first switch position, and responsive to the act of placing the key-operated switch in the first condition, for beginning to measure a first delay interval, G. second delay means, fully operative only after the first delay interval has been measured to its conclusion, and responsive to operation of the first switch means, for beginning to measure a second delay interval, and H. third delay means, operative unless and until inhibited by placement of the key-operated switch means in the second condition, for defining a third delay interval during which the alarm means is operated.
Claim 2
Dependent Claim
236 words
An alarm system for use in a vehicle to detect unauthorized entry into the vehicle, comprising: A. a first switch means positioned to be operated when a door of the vehicle is opened, B. a key-operated switch means having at least first and second switch conditions, normally being in the first condition when the vehicle is empty, and adapted to be placed in the second condition by insertion and operation of a key, C. a two-position switch means which is manually operable between first and second switch positions, D. alarm means for giving an alarm when operated, E. disabling means operative only when the key-operated switch is in the second condition and responsive to placement of the two-position switch in the second switch position for disabling the alarm system, F. first delay means, operative only when the two-position switch is in the first switch position, and responsive to the act of placing the key-operated switch in the first condition, for beginning to measure a first delay interval, G. second delay means, fully operative only after the first delay interval has been measured to its conclusion, and responsive to operation of the first switch means, for beginning to measure a second delay interval, and H. third delay means, operative unless and until inhibited by placement of the key-operated switch means in the second condition, for defining a third delay interval during which the alarm means is operated.
Claim 3
Dependent Claim
178 words
For use in a vehicle having a d.c. power supply, an alarm system for providing an alarm in response to unauthorized entry into the vehicle, said system comprising: A. switch means operated by said entry, B. alarm means, C. alarm energizing means connected to operate said alarm means, the energizing means being provided with an input terminal and, when activated by an activating signal to said input terminal, energizing said alarm means to produce said alarm, and D. activating means connected to said switch means for activating said alarm energizing means after a predetermined delay and during a predetermined duration in response to the operation of said switch means, wherein said activating means comprises 1. an input capacitor connected across the terminals of said power supply through a circuit including said switch means, 2. a first resistor shunting said input capacitor, 3. an output capacitor coupled to said input capacitor through a second resistor shunted by a diode, and 4. means for connecting said input terminal to the common terminal of said output capacitor and said second resistor.
Claim 4
Dependent Claim
178 words
For use in a vehicle having a d.c. power supply, an alarm system for providing an alarm in response to unauthorized entry into the vehicle, said system comprising: A. switch means operated by said entry, B. alarm means, C. alarm energizing means connected to operate said alarm means, the energizing means being provided with an input terminal and, when activated by an activating signal to said input terminal, energizing said alarm means to produce said alarm, and D. activating means connected to said switch means for activating said alarm energizing means after a predetermined delay and during a predetermined duration in response to the operation of said switch means, wherein said activating means comprises 1. an input capacitor connected across the terminals of said power supply through a circuit including said switch means, 2. a first resistor shunting said input capacitor, 3. an output capacitor coupled to said input capacitor through a second resistor shunted by a diode, and 4. means for connecting said input terminal to the common terminal of said output capacitor and said second resistor.
Claim 5
Dependent Claim
19 words
An alarm system according to claim 2, wherein at least one of the first and second resistors is adjustable.
Claim 6
Dependent Claim
125 words
An alarm system according to claim 3, wherein said alarm energizing means further comprises an exit delay means controlled by a key switch and by a manual switch, said exit delay means including an RC network comprising a third capacitor connected to said power supply, a third resistor shunted by a diode in series with said capacitor, and a fourth resistor connected to ground, said manual knob being inserted between said third and fourth resistor, said key switch having a first terminal connected to the common terminal of said manual knob and of said fourth resistor, and having a second terminal connected to said power supply, said exit delay means further including means to inhibit said alarm energizing means when said third capacitor is discharged.
References Cited (Backward Citations)
US3740713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |