US3605087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle alarm system
Assignee: Curtis Dyna Products Corp
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Filing: 1969-08-06
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Granted: 1971-09-14
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Expires: 1989-08-06
Abstract
Abstract A sensitive current detector includes the vehicle ammeter and is responsive to current therein to activate a first pulser which sets a monostable multivibrator which activates another pulser having an output to the vehicle horn relay to sound the horn at a 2-cycle per second (Hz.) frequency. The monostable multivibrator resets after 1 minute of sounding of the horn to deactivate the horn unless the current detector continues to sense current. A delay timer responds to a key-operated switch or a remote disable switch to inhibit, for 15 seconds, activation of the sound pulser by the monostable. The monostable multivibrator can also be set by mechanically operable switches.
Inventors
- 👤 Philip L Nine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:51
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/08; B; B60; B60R; B60R25/00; B60R25/10; B60R25/1004; H; H03; H03K; H03K17/00; H03K17/28; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/284; B60R2025/1013; B60R25/1003
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
In a vehicle having an electrical system, an alarm system comprising: a current sensor coupled to said electrical system and responsive to a current change therein to produce an output signal; a first pulser having an input coupled to said sensor and responsive to said signal to produce output pulses; first switching means coupled to said first pulser and responsive to a pulse therefrom to produce an output signal for a first predetermined period of time; a second pulser having an input coupled to said first switching means and responsive to said output signal therefrom to produce output pulses; and alarm means coupled to said second pulser anD activated thereby.
Claim 2
Dependent Claim
110 words
In a vehicle having an electrical system, an alarm system comprising: a current sensor coupled to said electrical system and responsive to a current change therein to produce an output signal; a first pulser having an input coupled to said sensor and responsive to said signal to produce output pulses; first switching means coupled to said first pulser and responsive to a pulse therefrom to produce an output signal for a first predetermined period of time; a second pulser having an input coupled to said first switching means and responsive to said output signal therefrom to produce output pulses; and alarm means coupled to said second pulser anD activated thereby.
Claim 3
Dependent Claim
27 words
The alarm system of claim 1 wherein: said current sensor is responsive to steady state current levels different from a predetermined level to produce said output signal.
Claim 4
Dependent Claim
43 words
The alarm system of claim 1 wherein: said first pulser includes a first delay means to avoid said pulse output thereof in response to said current sensor output signal unless said sensor output signal persists longer than a second predetermined period of time.
Claim 5
Dependent Claim
24 words
The alarm system of claim 1 wherein: said current sensor includes a signal-translating device in series with a portion of said vehicle electrical system.
Claim 6
Dependent Claim
14 words
The alarm system of claim 1 wherein: said alarm means include the vehicle horn.
Claim 7
Dependent Claim
63 words
The alarm system of claim 1 and further comprising: second switching means coupled to said first switching means and operable, when actuated, to produce a signal input to said first switching means for activation thereof independent of said sensor means, said switching means being connected to a mechanically operable vehicle component for activating said alarm means in response to movement of said component.
Claim 8
Dependent Claim
41 words
The alarm system of claim 1 and further comprising: delay means coupled to the output of said first switching means and inhibiting the output of a signal from said first switching means to said second pulser for a predetermined delay period.
Claim 9
Dependent Claim
33 words
The alarm system of claim 7 wherein: said delay means include a key-operated switch for arming and disarming the alarm system, and a remotely operable switch for temporary disablement of the alarm system.
Claim 10
Dependent Claim
30 words
The alarm system of claim 1 wherein: said first pulser is an astable multivibrator; said first switching means is a monostable multivibrator; said second pulser is a second astable multivibrator.
Claim 11
Dependent Claim
97 words
The alarm system of claim 1 wherein: said sensor includes a constant current source having a diode-connected biasing transistor with the emitter-collector path thereof in series with a first impedance means across an energy supply, and a current source transistor having its base coupled to the collector of said biasing transistor and biased thereby, and having its emitter-collector path coupled in series with a second impedance means and a portion of said vehicle electrical system and to said energy supply, the said current source transistor having an output conductor coupled thereto to produce said output signal thereon.
Claim 12
Dependent Claim
29 words
The alarm system of claim 10 wherein: said vehicle electrical system portion is one in common circuit relationship with a plurality of electrical devices of the vehicle electrical system.
Claim 13
Dependent Claim
33 words
The alarm system of claim 11 wherein: said first pulser includes an electrically operable switch having a control electrode coupled to said output conductor, and switchable by said output signal of said sensor.
Claim 14
Dependent Claim
55 words
The alarm system of claim 12 wherein: said sensor includes in the series coupling of the emitter-collector path of said current source transistor and said second impedance means and said electrical system portion, third impedance means to establish the level of said sensor signal output in response to current flowing in said electrical system portion.
Claim 15
Dependent Claim
15 words
The alarm system of claim 13 wherein: said electrical system portion is the vehicle ammeter.
References Cited (Backward Citations)
US3422398A
Cited
US3533064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |