Boots – shoes – and leggings
Patent
1986-10-03
1988-05-24
Lall, Parshotam S.
Boots, shoes, and leggings
34087015, 340902, 340906, 364460, 364550, G06F 1520, G01C 1520
Patent
active
047470640
ABSTRACT:
An approaching vehicle informing system and method for informing the driver of a vehicle of the presence of a relatively approaching emergency vehicle and providing the driver with information regarding the amount of time until vehicles meet. Included are a transmitting station for simultaneously emitting periodic electromagnetic and sound pulses of preselected frequencies located on the emergency vehicle, and a receiving station located on the driver's vehicle. The receiving station includes circuitry to receive the electromagnetic and sound pulses and discriminate signals of the preselected frequencies. A microcomputer is programmed to measure the time interval between simultaneously emitted electromagnetic and sound pulses, determines the Doppler frequency shift of the received sound pulse, and calculates the time until vehicles meet, which is displayed in numerical form to the driver in the event the Doppler frequency of received sound pulses exceeds the frequency of emitted sound pulses.
REFERENCES:
patent: 3566348 (1971-02-01), Leyden et al.
patent: 3731273 (1973-05-01), Hunt
patent: 3735342 (1973-05-01), Helliker et al.
patent: 3784970 (1974-01-01), Simpkin
patent: 3796864 (1974-03-01), Sampey
patent: 3873963 (1975-03-01), Neal et al.
patent: 4075892 (1978-02-01), Burckhardt
patent: 4095551 (1978-06-01), Paul et al.
patent: 4238778 (1980-12-01), Ohsumi
patent: 4380004 (1983-04-01), Coats et al.
patent: 4468746 (1984-08-01), Davis
patent: 4543577 (1985-09-01), Tachibana et al.
patent: 4573049 (1986-02-01), Obeck
patent: 4674073 (1987-06-01), Naruse
Lall Parshotam S.
Teska Kevin J.
Wood Craig A.
LandOfFree
Approaching vehicle informing system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Approaching vehicle informing system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Approaching vehicle informing system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1062762