The regular sound of Big Ben chimes stopped, midday on 21 August 2017, before the start of repair work expected to last a few years.
The history of the Big Ben Clock Tower at Westminster dates back to the 13th Century but the tower as we now know it has its roots in 19th Century Britain.
His achievement is all the more impressive because he wasn’t even a professional clock maker. To him, it was a part-time hobby between life as a barrister and an MP.
George Airy had issued requirements that many clock makers had found fanciful and impossible to achieve. Among those conditions was a desire for complete precision in the clock’s time-keeping.
Denison's ‘Double Three-Legged Gravity Escapement’ guaranteed the clock’s accuracy by ensuring that the pendulum was impervious to external factors. It provided the best gap between the pendulum and the clock mechanism, thus assuring its dependability.
The clock is famous for its reliability and has steadily kept time over the years with very few exceptions: