Digital odometer

Claim 1

A digital odometer for a vehicle comprising mechanical encoder means located in the vicinity of and mechanically connected to be driven by the transmission of said vehicle, said encoder means including a plurality of rotatable encoder discs, means for incrementally rotating said discs by a predetermined amount for each unit of distance travelled by the vehicle, means for sensing and supplying digital electrical data signals corresponding to the rotational position of each of said discs as an indication of the total distance of travel of the vehicle, logic means including a first memory for receiving said data in digital form, and first digital indicator means for displaying data stored in said first memory, said indicator means being located for convenient viewing from the driver's area of the vehicle, said logic means and said first memory being wire connected to said transmission-located encoder, said logic means further including a second memory, manually controlled means for clearing said second memory, and program control means for incrementing the count stored in said second memory by a predetermined amount each time the contents of said first memory are incremented by such predetermined amount, and including second digital indicator means for displaying the count stored in said second memory.