Method and device for determining or for transmitting automatically, to a distance, the correction of parallax of apparatus to be laid from a remote observing station
GB492414A
Improvements in or relating to electric follow-up control systems
GB475459A
Improvements in and relating to devices for protecting rectifiers containing an ionised gas
GB493537A
Improved method for automatically comparing two electric alternating voltages of the same frequency and of the same phase or of opposed phases
GB417901A
Device for measuring periodical variations of fluid pressure
GB403126A
Improvements in and relating to high-voltage rectifiers having glass bulbs
GB413081A
Improvements in or relating to the control of vapour electric discharge devices
GB410880A
Improvements in and relating to control systems for vapour electric discharge devices
US2190353A
Control device for rectifiers with ionized vapor
US2140736A
Arrangement of two or more anodes for rectifiers provided with control electrodes
GB391792A
Improvements in or relating to current rectifiers
GB380872A
Improvements in or relating to the cooling of mercury rectifiers having glass envelopes
GB380863A
Improvements in or relating to the cooling of mercury rectifiers having glass envelopes
GB304228A
Improvements in or relating to mercury vapour apparatus
GB290597A
Improvements in or relating to means for operating mercury switches
GB272866A
Improvements in or relating to mercury switches
GB264837A
Improvements in or relating to mercury vapour apparatus
DE481294C
Mercury switch with tilting tube moved through a bimetal lamella and inert gas filling
GB249121A
Improvements in or relating to mercury vapour apparatus
