CLICK HERE FOR INDEX PAGE
 
JOHN HARRISON 1693-1776 ENGLAND

V.Ryan © 2018

 

John Harrison was a carpenter, who became obsessed with clocks and in particular clocks that could keep time accurately. He designed several long case clocks, which he claimed were accurate to a few seconds a month. In the seventeen hundreds, this was a remarkable achievement.
His clocks were very specially, because the mechanisms were comprised of different types of exotic woods, chosen to counter expansion and contraction and to avoid the need for additional lubrication. Harrison is known to have experimented in his own house, heating up a room to tropical temperatures, to test his clocks in warm conditions and then testing them in a room with the windows open, to test the same clock in cold / cool conditions.

Harrison developed many new and innovative designs for the mechanisms for clocks and timepieces.

John Harrison activity pursued the ‘Longitude Prize’, which was a very large cash prize offered by the British Government in 1714. The prize was for the designer / engineer, who developed a reliable precision timepiece for the navigation of the high seas. The motion and nature of the sea, meant that any clock / timepiece had to be shock proof and corrosion resistant. This was an era when Britain was expanded and exploring the oceans and a precision timepiece was required for accurate navigation. In 1761, after many decades of development, Harrison came up with H4, a marine chronometer or a precision sea watch.

Captain Cook took a copy of the timepiece H4 (called K4) on his trips of discovery, in the southern Pacific Ocean, creating very accurate charts as a result. Captain Cook called K4 ‘our faithful guide’.

 
 
 
 
 
 
CLICK HERE FOR "DESIGNERS WHO DESERVE RESPECT"
 
CLICK HERE FOR PRODUCT DESIGN INDEX PAGE
 
Google
 
Web www.technologystudent.com