Patent US3914735A successfully refreshed from Google Patents.
US3914735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reliable safety alarm device for automotive vehicle with engine time delay stop and starter override
Assignee: Individual
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Filing: 1973-06-07
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Granted: 1975-10-21
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Expires: 1993-06-07
Abstract
Abstract A safety device for an automotive vehicle comprises one or several monitoring elements for monitoring one or several physical parameters of the vehicle, and control means coupled to a point in the electric ignition circuit of the vehicle. In response to an alarm signal produced by at least one of the monitoring elements, the safety device operates to cut off the electric supply to the vehicle ignition circuit. The safety device further comprises a time delay means connected between the monitoring elements and the control means to delay the alarm signal from at least one of said monitoring elements during a first predetermined time interval. Compensating circuit means including a second time delay operates in response to an electric signal generated when the starter is operated whereby a signal is applied to the control means input during a second, shorter predetermined time interval thereby to inhibit the action of the alarm signal from the first time delay output during the second time interval.
Inventors
- 👤 Leon Guillaume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:14
CPC Classifications
B; B60; B60K; B60K28/00; B60K28/10; G; G07; G07C; G07C5/00; G07C5/08; G07C5/0816; G07C5/0825
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
201 words
In an automotive vehicle including an engine, an ignition circuit for the engine, a source of electric current for the ignition circuit, starter means to energize the ignition circuit from said source of electric current, and a mechanism whose operation is governed by at least one physical parameter, a safety device comprising: a monitoring element for said at least one physical parameter to produce an alarm signal when the physical parameter sensed thereby reaches a predetermined threshold value, control means having an input and coupled to a point in said ignition circuit and responsive to said alarm signal from said monitoring element to disconnect the source of electric current from the ignition circuit, first time delay means connected between said monitoring element and said control means input to delay said alarm signal from said monitoring element during a first time interval, and second time delay means responsive to the operation of said starter means and connected to apply an inhibiting signal to said control means during a predetermined second time interval, said second time interval being shorter than said first time interval, thereby to inhibit the operation of said control means during said predetermined second time interval when starting the engine.
Claim 2
Dependent Claim
201 words
In an automotive vehicle including an engine, an ignition circuit for the engine, a source of electric current for the ignition circuit, starter means to energize the ignition circuit from said source of electric current, and a mechanism whose operation is governed by at least one physical parameter, a safety device comprising: a monitoring element for said at least one physical parameter to produce an alarm signal when the physical parameter sensed thereby reaches a predetermined threshold value, control means having an input and coupled to a point in said ignition circuit and responsive to said alarm signal from said monitoring element to disconnect the source of electric current from the ignition circuit, first time delay means connected between said monitoring element and said control means input to delay said alarm signal from said monitoring element during a first time interval, and second time delay means responsive to the operation of said starter means and connected to apply an inhibiting signal to said control means during a predetermined second time interval, said second time interval being shorter than said first time interval, thereby to inhibit the operation of said control means during said predetermined second time interval when starting the engine.
Claim 3
Dependent Claim
26 words
The device of claim 1, wherein said first time delay means comprises paralleled capacitor means and resistor means connected between the control means input and ground.
Claim 4
Dependent Claim
21 words
The device of claim 2 wherein a Zener diode is connected in parallel with the paralleled capacitor means and resistor means.
Claim 5
Dependent Claim
21 words
The device of claim 1 wherein a warning device is connected between said monitoring element and said first time delay means.
Claim 6
Dependent Claim
128 words
The device of claim 1, wherein said control means comprises: a silicon controlled rectifier having its cathode-to-anode junction connected between a point in said ignition circuit and ground, and having a gate electrode, a first transistor having base, emitter and collector terminals, the emitter terminal of said first transistor being coupled to the gate electrode of said silicon controlled rectifier, the collector and base terminals of said transistor being coupled to a positive voltage, and a second transistor having base, emitter and collector terminals, the base terminal of said second transistor being coupled to said first time delay means, the emitter terminal of said second transistor being coupled to ground, and the collector terminal of said second transistor being coupled to the base terminal of said first transistor.
Claim 7
Dependent Claim
50 words
The device of claim 5 further comprising biasing means connected to the base terminal of said second transistor and responsive to any failure in said safety device circuitry to remove the bias on the base terminal on said second transistor, thereby causing said silicon controlled rectifier to be gated on.
Claim 8
Dependent Claim
48 words
The device of claim 6 wherein said biasing means comprises: a source of biasing voltage, a first decoupling diode connected between said monitoring element and said source of biasing voltage, and a second decoupling diode connected between said source of biasing voltage and said first time delay 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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |