US3639896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle speed responsive warning actuating system
Assignee: Ford Motor Co
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Filing: 1970-05-04
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Granted: 1972-02-01
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Expires: 1990-05-04
Abstract
Abstract Electronic control circuitry responds to vehicle speed to actuate sequentially a plurality of warning lamps when vehicle speed reaches predetermined values. Actuation of each warning lamp automatically extinguishes its preceding lamp. Other devices also can be operated by the system, which attains extremely high accuracy from conventional electrical components.
Inventors
- 👤 Michael Bozoian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:41
CPC Classifications
B; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/50; B60Q1/54; G; G01; G01P; G01P1/00; G01P1/07; G01P1/08; G01P1/10; G01P1/103
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
An electronic system for actuating a plurality of devices on a vehicle as functions of vehicle speed comPrising a source of electrical energy, an electrical signal generator driven rotatably at a speed representative of vehicle speed, first control circuit means coupled to the energy source and the signal generator for actuating a first device when vehicle speed reaches a first predetermined value, second control circuit means coupled to the energy source and the signal generator for actuating a second device when vehicle speed reaches a higher predetermined value, and means coupling the first control circuit means to the second control circuit means for deactuating the first device when the second device is actuated.
Claim 2
Dependent Claim
113 words
An electronic system for actuating a plurality of devices on a vehicle as functions of vehicle speed comPrising a source of electrical energy, an electrical signal generator driven rotatably at a speed representative of vehicle speed, first control circuit means coupled to the energy source and the signal generator for actuating a first device when vehicle speed reaches a first predetermined value, second control circuit means coupled to the energy source and the signal generator for actuating a second device when vehicle speed reaches a higher predetermined value, and means coupling the first control circuit means to the second control circuit means for deactuating the first device when the second device is actuated.
Claim 3
Dependent Claim
45 words
The system of claim 1 in which each control circuit means comprises a charging circuit for charging a capacitor to a voltage level representative of engine speed and a switching circuit for actuating one of said devices when the voltage level reaches a predetermined value.
Claim 4
Dependent Claim
50 words
The system of claim 2 in which the switching circuit decreases its switching level with increasing voltage of said source of electrical energy, and the charging circuit comprises a voltage reference diode in series with a resistor for increasing the voltage level on the capacitor to compensate for the decrease.
Claim 5
Dependent Claim
37 words
The system of claim 3 in which the means coupling the first and second control circuit means is a diode that becomes forward biased to deactuate the first device when the second control circuit means is actuated.
Claim 6
Dependent Claim
42 words
The system of claim 4 in which the diode connects the input of the switching circuit of the first control circuit means to a sense terminal in the second control circuit means that approaches ground potential when the second device is actuated.
Claim 7
Dependent Claim
37 words
The system of claim 1 in which the means coupling the first and second control circuit means is a diode that becomes forward biased to deactuate the first device when the second control circuit means is actuated.
References Cited (Backward Citations)
US3229249A
Cited
US3203501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |