Reversing alarm

Communications: electrical – Land vehicle alarms or indicators – External signal light system

Reexamination Certificate

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Details

C340S463000, C340S384720

Reexamination Certificate

active

06885295

ABSTRACT:
A reversing alarm for a vehicle emits an audible signal in the form of pulses of broad band sound when the vehicle is put into reverse gear. The broad band sound allows persons in the vicinity to locate the vehicle, as the human brain is able to process broad band sound to pinpoint the location of the sound source in a way which is not possible with single tone sounds. The alarm is implemented via a simple electronic circuit which uses a zener diode as a signal generator20to generate the broad band sound.

REFERENCES:
patent: 3905016 (1975-09-01), Peterson
patent: 3943507 (1976-03-01), Neal et al.
patent: 4030088 (1977-06-01), McCullough
patent: 4290053 (1981-09-01), Nemoto
patent: 4994800 (1991-02-01), Milliken
patent: 5105394 (1992-04-01), Percy
patent: 5650765 (1997-07-01), Park
patent: 6064302 (2000-05-01), Peterson et al.
patent: 2225002 (1998-06-01), None
patent: 2 040 092 (1980-08-01), None
patent: 2 318 662 (1998-04-01), None
patent: 2318662 (1998-04-01), None
patent: 0007506.9 (2000-05-01), None
patent: PCTGB 01/01196 (2001-07-01), None

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