Electric installation permitting of selecting and controlling local electric circuits from a distance
DE447291C
Spring switch for electromagnetic winding devices on clockworks
GB246478A
Improvements in electric signalling apparatus
GB224872A
Means for sending into an electric circuit intermittent currents always of equal duration, separated by periods of interruption of current of the same duration
DE399355C
Electric winding device for clocks
DE413989C
Electric installations for the remote setting of display devices, in particular devices for displaying exchange rates
DE404991C
Device for sending intermittent currents of always the same duration interruption in an electrical circuit
