Combined digital display speedometer and log

Claim 1

A combined digital readout speedometer and log comprising in combination: a. a voltage sensor having a D.C. voltage output proportional to the speed of a vessel, b. means for converting said voltage to a frequency wherein said frequency is directly proportional to speed, c. means for taking a first output from said voltage converter to a divider and first accumulator wherein a count is accumulated in said first accumulator representing distance, d. means for taking a second output from said voltage converter and sampling said frequency for a precise period of time and accumulating said count in a second accumulator wherein said count represents speed, e. means to selectively interrogate said distance and speed counts in said first and second accumulators comprising a plurality of pairs of electronic AND gates connected to the outputs of said first and second accumulators and a switchable biasing means operatively connected to each AND gate of said pairs of electronic AND gates to selectively enable certain AND gates to interrogate said outputs of said accumulators, and f. a single digital display means connected to the outputs of said pairs of electronic AND gates, said single digital display means for said first and second outputs employed to indicate both distance and speed.