Device for keeping the current constant in the secondary circuits of step transformers by means of iron resistors connected upstream of the individual winding steps
DE466042C
Arrangement for AC voltage test
DE486017C
Voltage divider circuit for starting two metal wire incandescent lamps at the nominal voltage on overlapping areas of the voltage divider
DE483648C
Automatic switching device for electric metal filament lamps
DE481533C
Arrangement for checking and regulating mains voltages using the difference method
DE532559C
AC voltage divider
DE469979C
Container for electrical connection cables
DE475835C
Arrangement for current measurement in electric light bulbs using the bolometer principle
DE617473C
Switch assembly consisting of a controller and a toggle switch
DE482733C
Switching device for quickly matching the temperatures of two metal filament incandescent lamps connected one behind the other and in series with a short-circuitable series resistor