Electromagnetic radiation valve

Claim 1

AN OPTICAL RADIATION VALVE FOR CONTROLLING THE TRANSMISSION OF OPTICAL RADIATION PASSING THERETHROUGH COMPRISING IN COMBINATION: (A) CONTAINER MEANS HAVING MEANS FOR PASSING OPTICAL RADIATION INTO AND OUT OF SAID CONTAINER, SAID CONTAINER BEING SUBSTANTIALLY IMPERMEABLE TO MAGNETIC FLUX, (B) A LIQIUID COLLOIDAL SOLUTION HELD WITHIN SAID CONTAINER MEANS, AT LEAST A PORTION OF SAID SOLUTION BEING LOCATED IN THE PATH OF SAID OPTICAL RADIATION AND COMPRISING A MAJOR PROPORTION OF A SOLVENT AND MAGNETIC METALLO-POLYMERIC, FERROMAGNETIC PARTICLES WHICH ARE POLYMERIC BACKBONES CONTAINING 10-6 TO 10-1 GRAMS OF MAGNETIC METAL PER CC. OF SOLVENT IN THE FORM OF CLUMPS, WHEREIN SAID MAGNETIC METAL IS SELECTED FROM THE GROUP CONSISTING OF IRON, COBALT AND NICKEL, AND WHICH CLUMPS ARE CHEMICALLY BONDED TO GROUP VIII TRANSITION METAL CARBONYL GROUPS ON SAID POLYMERIC BACKBONES, THE COMBINATION OF SAID METAL CLUMPS AND CARBONYL SUBSTITUTED POLYMER BEING RESISTANT TO SEPARATION AND SETTLEMENT TO THE BOTTOM OF THE COLLOIDAL SOLUTION, SAID SOLVENT BEING SUBSTANTIALLY PERMEABLE TO SAID OPTICAL RADIATION AND SAID SOLUTION HAVING THE PROPERTY OF RESPONDING TO AN APPLIED MAGNETIC FIELD TO VARY THE INTENSITY OF LIGHT TRANSMISSION THERETHROUGH FROM A LIGHT SOURCE, (C) A FIRST COIL MEANS CONNECTED TO A SOURCE OF EMF ENGAGING SAID CONTAINER MEANS WHEREIN CURRENT PASSING THROUGH SAID COIL CREATES A MAGNETIC FIELD WITHIN SAID SOLUTION AND WHEREIN VARIATIONS IN THE STRENGTH OF SAID MAGNETIC FIELD PROPORTIONATELY ALTER THE AMOUNT OF LIGHT TRANSMITTED THROUGH SAID SOLUTION.