Today I demonstrated a prototype of the e-Jones Counter which meets the above requirements at least over a limited range of about 30 metres with my old push bike turned upside down and the wheel rocked back and forth by hand.
e-Jones Counter zeroed when the Jones Counter read 10000

Move wheel backwards and forwards- no counts lost:

Continue backwards and forwards reaching a maximum of 326 counts:

Turn wheel backwards to reach zero:

Conclusion: The e-Jones Counter prototype tracks perfectly the count on the Jones Counter.
Tomorrow I am going to have my electrically assisted measuring bike fitted with suitable mounting points for the e-Jones Counter. This will involve having a suitable new front wheel built to carry the sensor targets. Once this has been done I can start to package my prototype electronics in a form suitable for handle bar mounting, and test on the road at higher measuring speeds.
The e-Jones Counter with its large LCD display will be capable of providing the following characteristics:
- Easily visible on the handle bars - no more peering at an axle mounted Jones
- Since the count is held in the electronics it will be possible to provide an additional readout on the LCD directly in metres or miles (using the working constant) with a resolution of 1 e-Jones count (0.1 metres)
- There is room on the LCD to display the intermediate distances in metres, or a count down in metres to the next split location.
- The e-Jones counts at the splits could be stored electronically for readout after the measurement into a spreadsheet ready to be used for the measurement report