Vehicle position indicator with selectable position alarm means

Details Vehicle position indicator with selectable position alarm means Vehicle position indicator with selectable position alarm means

1977-08-04

1980-10-21

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

235 92DN, 235 92EV, 235 92PL, 235 92PE, 364424, 364460, G08G 2100, G06F 1520

Patent

active

042297249

ABSTRACT:
A position indicator for automobiles, trucks, and other vehicles includes a numerical display of the vehicle position with respect to an interstate highway by providing a readout of the mile marker location of the vehicle. The display is actuated by an electrical circuit including a presettable up/down counter in which the initial location of the vehicle with respect to a reference marker along the highway is stored. Subsequent vehicle movement increments or decrements the stored count in response to the receipt of vehicle movement pulses from a pulse generator. A calibration circuit is provided to accurately calibrate the system for different vehicles. In one embodiment, a digital keyboard is provided for entering the initial vehicle position information as well as position information as to events along the roadway. A memory circuit is employed to store, for subsequent recall and display, the event locations. A warning system is provided to alert the driver with a visual and/or audible alarm when the vehicle approaches one of the stored event locations.

REFERENCES:
patent: 2928186 (1960-03-01), Hirsch
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patent: 3596010 (1971-07-01), Patterson
patent: 3711653 (1973-01-01), Barbier
patent: 3824534 (1974-07-01), Straumsues
patent: 3845289 (1974-10-01), French
patent: 4028531 (1977-06-01), Cottin et al.
patent: 4068307 (1978-01-01), Floyd et al.
patent: 4068308 (1978-01-01), Opper
patent: 4103332 (1978-07-01), Floyd et al.
patent: 4145605 (1979-03-01), Marcus

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