Dynamic range modifier

Claim 1

APPARATUS FOR MODIFYING THE DYNAMIC RANGE OF AN ELECTRICAL SIGNAL COMPRISING: A FIRST ELECTRICAL CIRCUIT THROUGH WHICH SAID ELECTRICAL SIGNAL IS CONDUCTED, SAID CIRCUIT HAVING AN INPUT CIRCUT AND AN OUTPUT CIRCUIT INCLUDING AN OUTPUT RESISTANCE, AN INCANDESCENT SOURCE OF LUMINOUS ENERGY, A SECOND ELECTRICAL CIRCUIT HAVING AN INPUT CIRCUIT TO WHICH SAID ELECTRICAL SIGNAL IS APPLIED, SAID SECOND ELECTRICAL CIRCUIT HAVING AN OUTPUT CIRCUIT CONNECTED TO SAID SOURCE OF VARIABLE CONRTOLLING THE INTENSITY OF THE LUMINOUS ENERGY RADIATED BY SAID SOURCE AS A GENERALLY SMOOTH CONTINUOUS FUNCTION OF THE AMPLITUDE LEVER OF SAID ELECTRICAL SIGNAL OVER A SUBSTANTIAL RANGE OF AMPLITUDE LEVERS THEREOF, A LIGHT-SENSITIVE RESISTOR POSITIONED IN LIGHT-RECEIVING RELATIONSHIP WITH SAID POSITIONED IN LIGHT-RECEIVING SISTOR HAVING A RESISTANCE WHICH VARIES AS A FUNCTION OF THE INTENSITY OF THE LUMINOUS ENERGY IMPINGING THEREON, SAID LIGHT-SENSITIVE RESISTOR BEING CONNECTED IN SAID FIRST ELECTRICAL CIRCUIT TO VARY THE CONDUCTIVTY THEREOF AS A FUNCTION OF SAID INTENSITY, AND A SWITCH HAVING FIRST AND SECOND POSITIONS CONNECTED IN SAID FIRST ELECTRICAL CIRCUIT AND ADAPTED, WHEN IN SAID FIRST POSITION, TO PLACE SAID LIGHT ADAPTED, WHEN IN SAID PARALLEL WITH SAID OUTPUT RESISTANCE AND, WHEN IN SAID SECOND POSITION, TO PLACE SAID LIGHT-SENSITIVE RESISTOR IN SERIES WITH SAID OUTPUT RESISTANCE, WHEREBY SAID ELECTRICAL CIRCUIT FUNCTION, WITH SAID SWITCH IN SAID FROM POSITION, TO COMPRESS THE DYNAMIC RANGE OF THE ELECTRICAL SIGNAL CONDUCTED THROUGH SAID FIRST ELECTRICAL CIRCUIT AND, WITH SAID SWITCH IN SAID SECOND POSITION, TO EXPAND THE DYNAMIC RANGE OF THE ELECTRICAL SIGNAL CONDUCTED THROUGH SAID FIRST ELECTRICAL CIRCUIT.