|
US2616987A
|
|
Amplifying circuit arrangement with periodically varying load connected in the cathode circuit
|
|
GB628637A
|
|
Improvements in or relating to resonant bridge circuits for harmonic analysis
|
|
GB625927A
|
|
Improvements in or relating to frequency analysers
|
|
GB630327A
|
|
Improvements in or relating to impedance-inverting networks
|
|
GB636185A
|
|
Improvements in and relating to a system for locating a receiving station with respect to a transmitting station
|
|
GB610450A
|
|
Improved radio beacon system for the blind landing of aircraft
|
|
GB610449A
|
|
Improvements in or relating to electric supply devices comprising a transformer and an induction regulator
|
|
DE873425C
|
|
Measuring device for determining the distortion caused by higher harmonics in an alternating voltage with a bridge circuit
|
|
DE908750C
|
|
Impedance inverting network
|
|
DE905277C
|
|
Capacitive voltage divider made up of at least two capacitors connected in series
|
|
DE888871C
|
|
Circuit arrangement for supply transformers, which are gradually energized when switched on via a rotary transformer
|
|
ES155706A1
|
|
Radiobazilling system for the landing of blind aircraft
|
|
GB571239A
|
|
Improvements in or relating to radio transmitting devices for navigation purposes
|
|
GB532793A
|
|
Improvements in or relating to amplifiers with negative feedback
|
|
GB520821A
|
|
Improvements in or relating to directional radio transmitting devices
|
|
GB462843A
|
|
Improvements in short-wave transmitters for aerial and marine navigation
|
|
GB460642A
|
|
Improved radio system for giving bearings in air and marine navigation
|
|
GB399957A
|
|
Improvements in apparatus for determining the direction of magnetic or electro-magnetic fields
|
|
GB381724A
|
|
Improvements in or relating to radio electric receivers
|
|
GB375887A
|
|
Improvements in or relating to electromagnetic signalling for aerodromes
|
