Early form of mercury interrupter
1880
Mercury interrupter
1860-1890
Hammer break interrupter by Ducretet & Lejeune
Interrupter for induction coil (early form)
1870
Mercury interrupter and rectifier
1905-1909
App's clockwork interrupter
1890
Clockwork interrupter with wooden cover
1904
Electrical interrupter
Large interrupter by Alfred Apps, London
Mackenzie Davidson interrupter by Cox
1902
Jet interrupter with motor
1900
Electrical interrupter
Electrical interrupter
Mercury interrupter driven by an electric motor
1890-1899
Foucault-type mercury interrupter with twin Ruhmkorff commutators
Mercury interrupter
Four pole Wehnelt electrolytic interrupter
1910