Photographic spark generator having a very high frequency bridge trigger

Claim 1

DEVICE FOR DETECTING THE PASSAGE OF A PROJECTILE MOVING AT A VERY HIGH VELOCITY AND FOR PHOTOGRAPHING SAID PROJECTILE WHICH COMPRISES TWO VERY HIGH FREQUENCY ANTENNAS NAMELY A TRANSMITTING ANTANNAND A RECEVING ANTENNA DISPOSED ON OPPOSITE SIDES OF THE PATH OF TRAVEL OF SAID PROJECTILE, A VERY HIGH FREQUENCY GENERATOR HAVING AN OUTPUT WITH A WAVELENGTH NOT EXCEEDING THE DIAMETER OF SAID PROJECTILE, A DIRECTIONAL COUPLER CONNECTED TO THE OUTPUT OF SAID VERY HIGH FREQUENCY GENERATOR AND HAVING A FIRST SECTION AND A SECOND SECTION, A MAGIC T HAVING A FIRST ARM AND A SECOND ARM, A CRYSTAL DETECTOR CARRIED BY SAID MAGIC T, AND A CLOSED ELECTROMAGNETIC CIRCUIT COMPRISING A FIRST BRANCH AND A SECOND BRANCH CONNECTED IN PARALLEL WITH ONE ANOTHER BETWEEN SAID DIRECTIONAL COUPLER AND SAID MAGIC T, SAID FIRST GRANCH CONSISTING ESSENTIALLY OF SAID ANTENNAS, FIRST WAVE GUIDE MEANS CONNECTING SAID FIRST SECTION OF SAID DIRECTIONAL COUPLER TO SAID TRANSMITTING ANTENNA AND SECOND WAVEGUIDE MEANS CONNECTING SAID RECEIVING ANTENNA TO SAID FIRST ARM OF SAID MAGIC T TO PROVIDE A FIRST PATH OF TRAVEL OF ELECTROMAGNETIC WAVES FROM SAID FIRST SECTION OF SAID DIRECTIONAL COUPLER THROUGH SAID FIRST WAVEGUIDE MEANS, SAID TRANSMITTING ANTENNA, SAID RECEIVING ANTENNA AND SAID SECOND WAVE GUIDE MEANS TO SAID FIRST ARM OF SAID MAGIC T, AND SAID SECOND BRANCH CONSISTING ESSENTIALLY OF AN ADJUSTABLE PHASE CONVERTER, AN ADJUSTABLE ATTENUATOR AND THIRD WAVE GUIDE MEANS CONNECTING SAID PHASE CONVERTER AND ATTENUATOR IN SERIES BETWEEN SAID SECOND SECTION OF SAID DIRECTIONAL COUPLER AND SAID SECOND ARM OF SAID MAGIC T TO PROVIDE A SECOND PATH OF TRAVEL OF ELECTROMAGNETIC WAVES FROM SAID SECOND SECTION OF SAID DIRECTIONAL COUPLER THROUGH SAID PHASE CONVERTER AND ATTENUATOR TO SAID SECOND ARM OF SAID MAGIC T, AN AMPLIFIER CONNECTED TO SAID DETECTOR CRYSTAL AND A SPARK GENERATOR CONNECTED TO SAID AMPLIFIER FOR PHOTOGRAPHING SAID PROJECTILE WHEN IT IS CAUSED TO PASS BETWEEN SAID ANTENNAS.