Exploding wire high-speed shutter for protecting a human viewer

Claim 1

AN LIGHT VALVE ADAPTED TO UNDERGO RAPID TRANSITION FROM AN OPEN CONDITION, WHEREIN A LIGHT TRANSMISSION PATH IS PROVIDED THERETHROUGH, TO A CLOSED CONDITION, WHEREIN SAID LIGHT TRANSMISSION PATH IS INTERRUPTED, IN RESPONSE TO AN INTENSE LIGHT FLASH ALONG THE LIGHT TRANSMISSION PATH EXTERNALLY OF SAID VALVE; SAID VALVE COMPRISING: AN OPAQUE HOUSING HAVING A PAIR OF AT LEAST PARTIALLY OPEN ENDS DISPOSED IN LIGHT TRANSMITTING RELATIONSHIP TO EACH OTHER; FIRST AND SECOND TRANSPARENT WINDOWS POSITIONED RESPECTIVELY IN SAID PAIR OF OPEN ENDS TO PROVIDE A LIGHT TRANSMISSION PATH THROUGH SAID HOUSING; A CONDUCTIVE WIRE COMPOSED OF MATERIAL WHICH VAPORIZES UPON APPLICATION OF HIGH CURRENT THERETO, AND DISPOSED WITHIN SAID HOUSING RELATIVE TO AT LEAST ONE OF SAID FIRST AND SECOND WINDOWS SUCH THAT SAID MATERIAL IS DEPOSITED ON SAID AT LEAST ONE OF SAID WINDOWS IN THE FORM OF AN APAQUE COATING UPON VAPORIZATION OF SAID MATERIAL WHICH SERVES TO STOP THE LIGHT TRANSMISSION AND SO DISPOSED RELATIVE TO THE OTHER OF SAID FIRST AND SECOND WINDOWS THAT SAID OPAQUE HOUSING PREVENTS LIGHT TRANSMISSION FROM SAID WIRE TO SAID OTHER OF SAID FIRST AND SECOND WINDOWS; MEANS HERMETICALLY SEALING SAID HOUSING; MEANS FOR EVACUATING SAID HOUSING; AND MEANS RESPONSIVE TO SAID INTENSE LIGHT FLASH FOR SUBSTANTIALLY INSTANTANEOUSLY APPLYING INCLUDING AN TO SAID WIRE, SAID MEANS FOR APPLYING INCLUDING AN ELECTRICAL POWER SUPPLY, AN ELECTRIC CIRCUIT COUPLING SAID POWER SUPPLY TO SAID WIRE IN NORMALLY OPEN CIRCUIT RELATIONSHIP, AND PHOTOELECTRIC MEANS TO ENERGIZE SAID ELECTRIC CIRCUIT IN RESPONSE TO SAID INTENSE LIGHT FLASH SO THAT CURRENT DERIVED FROM SAID POWER SUPPLY IS SUBSTANTIALLY INSTANTANEOUSLY APPLIED TO SAID WIRE.