20 | HISTORY
He could answer questions put to him by his colleagues when
they were faced with the difficulties involved in watch com-
plications. He could see at a glance the faults that prevented
his fellow-watchmakers from achieving their aims, and help
them to improve their precious time-keepers.
He spent his whole life firmly rooted to his family home. He
died in Le Locle in 1826 after working for almost 80 years to
perfect his art, the art of the watchmaker.
a
braham
-L
ouIs
P
erreLet
the
InVentor
For many years, he devoted most of his time to developing
a reliable and strong automatic winding mechanism (around
1760). He certainly cherished utopian ideas of perpetual
motion in this, but above all, he had the very practical aim
of eliminating the tedious task of rewinding pocket watches
with a key. Around 1770 Abraham-Louis Perrelet had already
developed and fitted several movements, with a so-called
"hammer" oscillating weight, using an initial version of the
automatic winding movement called the "jerking move-
ment".
A few years later – and after many resistance-related problems
associated with the shocks suffered by the movement when
the " hammer" weight reaches the end of its travel – he finally
developed an oscillating weight system, fixed onto the central
shaft of the movement, and now usually known as the
" rotor".
Summary of Contents for TURBINE DIVER Series
Page 2: ...CALIBRE P 331 TURBINE ...
Page 3: ...CALIBRE P 331 TURBINE DIVER ...
Page 148: ...146 ...
Page 166: ...Printed in Switzerland Imprimé en Suisse 04 2012 ...
