Title: Vehicle position indicator

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.

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Inventors: Marcus, Konrad H. (Holland, MI, US)

Application Number: 786293
Filing Date: 1977-04-11
Publication_date: 1979-03-20
Assignee: Prince Corporation (Holland, MI)
Primary Class(es): 340/988 377/17, 377/24.1, 377/45, 377/50, 377/52, 377/55, 701/200, 701/300, 702/97, 702/165
Other Classes:
US Patent Ref:

3226021	Dec, 1965	Dusinberre et al.	235/92.
3614617	Oct, 1971	Blake	324/166.
3865305	Feb, 1975	Sampey	235/92.
3947664	Mar, 1976	Cox et al.	235/92.
3984661	Oct, 1976	Mayer et al.	235/92.
4053749	Oct, 1977	Shinoda et al.	235/92.
4068307	Jan, 1978	Floyd	364/424.
4068308	Jan, 1978	Opper	364/449.
4074196	Feb, 1978	Webster	324/166.

Other Refs:
Primary Examiner: Thesz, Joseph M.
Assistant Examiner:
Attorney: Price, Heneveld, Huizenga & Cooper