Communications: electrical – Selective – Having indication or alarm
Patent
1975-01-13
1976-12-14
Caldwell, John W.
Communications: electrical
Selective
Having indication or alarm
325 29, 340 23, 343112CA, G08G 116
Patent
active
039978680
ABSTRACT:
A vehicle signaling arrangement in which emergency vehicles are provided with radio frequency signal generating means for generating a radio frequency signal and an antenna for transmitting the radio frequency signal to regions external the emergency vehicle. Preselected other vehicles, which may include passenger cars, trucks, and all other vehicles, and if desired, the emergency vehicles themselves, are provided with radio frequency signal receiver means for receiving the radio frequency signal. Indicator means are coupled to the radio frequency signal receiver means in the preselected other vehicles to indicate the reception of the radio frequency signal and thus indicate the presence of an emergency vehicle. Proximity indicating means may also be provided in the preselected other vehicles for indicating the relative proximity of the emergency vehicle thereto and, if desired, directional means may also be provided in the preselected other vehicles for indicating the relative direction of the emergency vehicle from the preselected other vehicles.
REFERENCES:
patent: 1983079 (1934-12-01), Hansen
patent: 2403603 (1946-07-01), Korn
patent: 3052882 (1962-09-01), Pidhayny et al.
patent: 3233217 (1966-02-01), Bost
patent: 3749893 (1973-07-01), Hileman
patent: 3778832 (1973-12-01), Carruthers
Gorenbein Steven M.
Ribnick Gerson D.
Caldwell John W.
Finkelstein Don B.
Groody James J.
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