Communications: electrical – Selective – Having indication or alarm
Patent
1975-07-01
1976-08-31
Habecker, Thomas B.
Communications: electrical
Selective
Having indication or alarm
180 98, 246 29R, G08G 100, B60T 1718
Patent
active
039784479
ABSTRACT:
A safety transmitting device for warning a motor vehicle at a railroad crossing of the approach of a train includes a tuning fork mechanically communicating with the tracks, wherein the vibrations of the tracks causes the fork to transmit sound waves. The sound waves are converted to the electro-magnetic waves by a transmitter unit. The fork and transmitter unit are positioned at a predetermined distance from the crossing. The electromagnetic waves are picked up by a receiver unit in the motor vehicle and converted to the electrical energy which causes activation of a sound device and flashing light unit in the interior of the motor vehicle as well as activation of an electrical pump in the brake line assembly of the vehicle which causes automatic slow application of the brakes.
REFERENCES:
patent: 1808022 (1931-06-01), Prete
patent: 1978286 (1934-10-01), Sommer
patent: 2208016 (1940-07-01), Cowles
patent: 3854119 (1974-12-01), Friedman
Habecker Thomas B.
Lawrence Peska Associates Inc.
Nanfeldt Richard E.
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