Sigmund Riefler
1847 - 1912
Sigmund Riefler was born in Munich and died in 1912. He was 65. He invented a form of compensated pendulum and escapement for observatory clocks in 1891. These astronomical clocks were recognized as the time standard from 1904 through 1929, when the Shortt clock replaced it.
Riefler (S.). - Die Precisions-Uhren mit vollkommen freien Echappement und neuem Quecksilber-Compensationspendel. Munich, 1894