Vehicle strobe warning light system

• US 4,127,844 A
• Filed: 03/23/1977
• Issued: 11/28/1978
• Est. Priority Date: 03/23/1977
• Status: Expired due to Term

• Current Assignee: Francis W. Purdy
• Original Assignee: Francis W. Purdy
• Inventors: Purdy, Francis W.
• Primary Examiner(s): Yusko, Donald J.
• Application Number:
  US05/780,356
• Time in Patent Office: 615 Days
• Field of Search: 340/66, 340/71, 340/72, 340/81 F, 340/81 R, 340/82, 340/87, 340/77
• US Class Current: 340/471
• CPC Class Codes: B60Q 1/44 for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
• CPC Class Codes: B60Q 1/46 for giving flashing caution signals during drive, other than signalling change of direction, e.g. flashing the headlights or hazard lights

Abstract

The warning light system comprises a high-intensity, electronic flash lamp used in combination with a highway vehicle'"'"'s conventional brake, turn signal, and emergency flasher light assemblies. The electronic flash lamp comprises a gas-filled lamp discharged across capacitors operating at about 800 to several thousand volts D.C. The flash lamp circuitry is tied into the existing brake light switch such that the capacitors will be discharged in response to actuation of the brake assembly when the brake initially is applied and the capacitors will not be discharged again until the brake assembly is actuated again. The resultant high-voltage pulse initiates a brilliant flash which lasts micro-seconds and which warns following drivers of an impending vehicle stop or slow-down. The high-intensity flash lamp circuitry also is tied into the turn signal and emergency flasher light assemblies so that a more positive indication of an impending turn or emergency is provided.

Claims

1. In a vehicle having a conventional headlight assembly, taillight assembly, and brake assembly, a method of warning a following driver, comprising the steps of:

(a) disposing an auxiliary flash lamp at the rear of the vehicle, the flash lamp capable of producing a high-intensity light of short duration;

(b) discharging the flash lamp in response to actuation of the brake assembly at the initiation of a braking operation; and

(c) discharging the lamp again only after a predetermined period of time has passed and in response to actuation of the brake assembly upon the initiation of another braking operation.

2. The method of claim 1, comprising the additional step of disposing a high-intensity flash lamp adjacent each brake lamp.

3. The method of claim 2, comprising the additional steps of:

(a) providing a turn signal assembly for the vehicle;

(b) disposing a high-intensity flash lamp adjacent each front turn signal lamp; and

(c) discharging the flash lamps on either side of the vehicle in response to actuation of the turn signal assembly at the initiation of a turn signaling operation and discharging the lamps again on that side only after;

(i) a predetermined period of time has passed;

(ii) the turn signaling operation is cancelled; and

(iii) a subsequent turn signaling operation is initiated.

4. The method of claim 3, comprising the additional steps of:

(a) providing an auxiliary flasher assembly for the vehicle; and

(b) discharging all the high-intensity flash lamps periodically at a predetermined frequency in response to actuation of the auxiliary flasher assembly to indicate an emergency condition.

5. The method of claim 3, comprising the additional step of dimming the auxiliary flash lamps under nighttime driving conditions.

6. A warning light system for use in a vehicle, comprising:

(a) a brake assembly;

(b) a brakelight assembly having a lamp illuminated in response to actuation of the brake assembly; and

(c) a flash lamp capable of producing a high-intensity light of short duration, the high-intensity lamp being flashed in response to actuation of the brake assembly at the initiation of a braking operation and being flashed again only after a predetermined period of time has passed and in response to actuation of the brake assembly upon initiation of another braking operation.

7. The apparatus of claim 6, wherein:

(a) a brakelight assembly is disposed on either side of the vehicle; and

(b) a high-intensity flash lamp is disposed adjacent each brake lamp.

8. A vehicle warning light system, comprising:

(a) a power source;

(b) brakelights disposed generally at the rear of the vehicle and in electrical communication with the power source;

(c) a brake switch connected intermediate the brake lights and the power source to control illumination of the brake lights;

(d) a high-intensity, electronic flash lamp disposed toward the rear of the vehicle and in electrical communication with the power source, the flash lamp comprising a lamp connected across capacitors and capable of producing a brilliant light on the order of 500,000 lumens for a period of approximately 30 milliseconds; and

(e) a trigger circuit to discharge the flash lamp only once for every time the trigger circuit is energized, the trigger circuit being in electrical communication with the brake switch and energizable only when the brake switch is closed, whereby initiation of a vehicle braking operation closes the brake switch and results in illumination of the brake lights and substantially simultaneous discharge of the flash lamp and whereby the trigger circuit cannot be re-energized until the brake switch is closed again.

9. The warning light system of claim 8, wherein the trigger circuit comprises:

(a) normally open contacts connected across the capacitors included as part of the flash lamp; and

(b) an actuator operatively connected to the contacts to close the contacts, the actuator being in electrical communication with the brake switch.

10. The warning light system of claim 8, wherein a dimming circuit is disposed intermediate the flash lamp and the power source, whereby the brilliance of the flash lamp may be decreased under nighttime driving conditions.

11. A vehicle warning light system, comprising:

(a) a power source;

(b) a plurality of turn signal lights disposed generally at corners of the vehicle and in electrical communication with the power source;

(c) a first flasher assembly connected intermediate the turn signal lights and the power source to control illumination of the turn signal lights, the first flasher assembly producing, in response to a steady input signal, a pulsed output signal having a frequency on the order of 60 to 100 cycles per minute;

(d) a first flasher switch connected intermediate the first flasher assembly and the power source to control operation of the first flasher assembly;

(e) a high-intensity, electronic flash lamp disposed adjacent each corner of the vehicle and in electrical communication with the power source, each flash lamp comprising a lamp connected across capacitors and capable of producing a brilliant light in the order of 500,000 lumens for a period of approximately 30 milliseconds;

(f) a second flasher assembly connected intermediate the flash lamps and the power source to control illumination of the flash lamps, the second flash assembly producing, in response to a steady input signal, a pulsed output signal having a frequency on the order of 30 cycles per minute;

(g) a second flasher switch connected intermediate the second flasher assembly and the power source to control operation of the second flasher assembly; and

(h) a trigger circuit to discharge each flash lamp, the trigger circuit being in electrical communication with the second flasher assembly, whereby actuation of the first flasher switch causes the turn signal lights to flash simultaneously at a frequency of about 60 to 100 cycles per minute and actuation of the second flasher switch causes the flash lamps to flash simultaneously at a frequency of about 30 cycles per minute.

12. The system of claim 11, wherein the trigger circuit comprises;

(a) normally open contacts connected across the capacitors included as part of the flash lamp; and

(b) an actuator operatively connected to the contacts to close the contacts, the actuator being in electrical communication with the second flasher switch.

13. The system of claim 11, wherein a dimming circuit is disposed intermediate each flash lamp and the power source, whereby the brilliance of the flash lamps may be decreased under selected conditions.

14. A vehicle warning light system, comprising:

(a) a power source;

(b) a plurality of turn signal lights disposed generally at corners of the vehicle and in electrical communication with the power source;

(c) a flasher assembly connected intermediate the turn signal lights and the power source to control illumination of the turn signal lights, the first flasher assembly producing, in response to a steady input signal, a pulsed output signal having a frequency on the order of 60 to 100 cycles per minute;

(d) a flasher switch connected intermediate the first flasher assembly and the power source to control operation of the flasher assembly;

(e) a high-intensity, electronic flash lamp disposed adjacent each corner of the vehicle and in electrical communication with the power source, each flash lamp comprising a lamp connected across capacitors and capable of producing a brilliant light on the order of 500,000 lumens for a period of approximately 30 milliseconds;

(f) a trigger circuit to discharge each flash lamp, the trigger circuit being in electrical communication with the flasher assembly; and

(g) a turn signal switch to discharge the turn signal lights, the turn signal switch being connected intermediate the flasher assembly and the turn signal lights, the turn signal switch also being connected intermediate a portion of the trigger circuit and the flasher assembly, whereby actuation of the turn signal switch causes the turn signal lights and the flash lamps to be illuminated.

15. The system of claim 14, wherein the trigger circuit comprises:

(a) normally open contacts connected across the capacitors included as part of the flash lamp;

(b) normally closed contacts in series with the normally open contacts, the normally closed contacts opening faster than the normally open contacts can close;

(c) a first actuator operatively connected to the normally open contacts to close the contacts, the first actuator being in electrical communication with the turn signal switch; and

(d) a second actuator operatively connected to the normally closed contacts to open the contacts, the second actuator being in electrical communication with the flasher assembly, whereby actuation of the turn signal switch alone will cause the turn signal lights to be illuminated and the flash lamps to flash but actuation of the flasher switch alone will cause only the turn signal lights to be illuminated.

16. The system of claim 14, wherein the flasher assembly pulses sufficiently frequently that the flash lamp capacitors cannot be recharged after the initial discharge.

17. The system of claim 14, wherein a dimming circuit is disposed intermediate each flash lamp and the power source, whereby the brilliance of the flash lamps may be decreased under selected conditions.

18. A vehicle warning light system, comprising:

(a) a power source;

(b) a plurality of turn signal lights disposed generally at corners of the vehicle and in electrical communication with the power source;

(c) a first flasher assembly connected intermediate the turn signal lights and the power source to control illumination of the turn signal lights, the first flasher assembly producing, in response to a steady input signal, a pulsed output signal having a frequency on the order of 60 to 100 cycles per minute;

(d) a first flasher switch connected intermediate the first flasher assembly and the power source to control operation of the first flasher assembly;

(e) brakelights disposed generally at the rear of the vehicle and in electrical communication with the power source;

(f) a brake switch connected intermediate the brake lights and the power source to control illumination of the brake lights;

(g) high-intensity, electronic flash lamps disposed generally at corners of the vehicle and in electrical communication with the power source, each flash lamp comprising a lamp connected across capacitors and capable of producing a brilliant light on the order of 500,000 lumens for a period of approximately 30 milliseconds;

(h) a trigger circuit to discharge the flash lamps, the trigger circuit being in electrical communication with the brake switch, whereby initiation of a vehicle braking operation closes the brake switch and results in illumination of the brake lights and substantially simultaneous discharge of the flash lamps disposed at the rear of the vehicle; and

(i) a turn signal switch to discharge the turn signal lights, the turn signal switch being connected intermediate the flasher assembly and the turn signal lights, the turn signal switch also being connected intermediate a portion of the trigger circuit and the first flasher assembly, whereby actuation of the turn signal switch causes the turn signal lights and the flash lamps to be illuminated.

19. The system of claim 18, additionally comprising:

(a) a second flasher assembly connected intermediate the flash lamps and the power source to control illumination of the flash lamps, the second flash assembly producing, in response to a steady input signal, a pulsed output signal having a frequency on the order of 30 cycles per minute; and

(b) a second flasher switch connected intermediate the second flasher assembly and the power source to control operation of the second flasher assembly, the second flasher assembly also being in electrical communication with the trigger circuit, whereby actuation of the first flasher switch causes the turn signal lights to flash simultaneously at a frequency of about 60 to 100 cycles per minutes and actuation of the second flasher switch causes the flash lamps to flash simultaneously at a frequency of about 30 cycles per minute.