- A very Rare DARKE INDICATOR made by ELLIOTT Bros of London Patent No11413
- similar version is on display In the Greenwich Maritime Museum.
- This particular example No 565 dates from the mid 1800's
- This. is boxed in its original wooden box and is as far as I can see complete even has the roll of paper for the read out.
- '' The Simplicity of the Tabor system influenced Edward Darke of London whose minimalist design was patented in Britain in 1879.
- Made exclusively by Elliott Brother's In 'small pattern' the Dark patent High Speed Indicator had only one fixed pivoting a swivelling link connecting the piston-rod extension to the pointer bar.
- The role of the other fixed pivot was taken by a vertical slot cut in a plate on the cylinder body.
- Great condition
- g34