Communications: electrical – Land vehicle alarms or indicators
Patent
1997-01-13
1998-06-16
Hofsass, Jeffery
Communications: electrical
Land vehicle alarms or indicators
340935, 340942, 180168, B60Q 100
Patent
active
057677654
ABSTRACT:
The motion detection system of the present invention includes a pair of signal reflectors positioned at a defined location for directing signals into the path of travel of an object. A corresponding pair of signal detecting devices positioned on the moving object detects the signals and produces responsive electrical signals. An electrical circuit is connected to receive these electrical signals and to provide an electrical output indicative of the direction of travel of said object.
REFERENCES:
patent: 2048740 (1936-07-01), Geffcken et al.
patent: 2400489 (1946-05-01), Dana et al.
patent: 3109157 (1963-10-01), Bolton
patent: 4549182 (1985-10-01), Gillet
patent: 5392034 (1995-02-01), Kuwagaki
Hofsass Jeffery
Toug Nina
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