Several other watch makers most notably Thomas Earnshaw had started to copy Arnold's work, the latter around 1780 modifying his detent escapement by mounting the detent on a spring and creating the spring detent escapement.
Around 1780, Earnshaw modifyied his detent escapement by mounting the detent on a spring to create the spring detent escapement. Several other watch makers, most notably Thomas Earnshaw, had started to copy Arnold's work.
Several other watch makers, most notably Thomas Earnshaw, had started to copy Arnold's work. Around 1780, Earnshaw modifyied his detent escapement by mounting the detent on a spring to create the spring detent escapement.
Several other watch makers, most notably Thomas Earnshaw, had started to copy Arnold's work. Around 1780, Earnshaw modifyied his detent escapement by mounting the detent on a spring to create the spring detent escapement.