Combined light meter and sighting device

Claim 1

A LIGHT METER, COMPRISING A HOUSING HAVING AN OBJECTIVE LENS AT ONE OF ITS ENDS ADAPTED TO FOCUS THE LIGHT FROM AN OBJECT TO BE MEASURED THROUGH SAID HOUSING, A PHOTOCONDUCTIVE ELEMENT CARRIED IN SAID HOUSING IN THE PATH OF THE FOCUSED LIGHT OF SAID OBJECTIVE LENS, AN EYE-PIECE MOUNTED AT THE HOUSING END OPPOSITE THE OBJECTIVE LENS IN SPACED RELATION TO SAID PHOTO-CONDUCTIVE ELEMENT, THE INNER WALLS OF SAID HOUSING BEING COATED WITH FELT FLOX BETWEEN SAID OBJECTIVE LENS AND THE PHOTO-CONDUCTIVE ELEMENT, AND AN INDICATING CIRCUIT CONNECTED TO SAID PHOTOCONDUCTIVE ELEMENT AND INCLUDING A MICRO-AMMETER HAVING A SCALE IN THE LINE OF SIGHT THROUGH SAID HOUSING AND AN ELECTRIC POWER SOURCE WHEREBY ACTUATION OF SAID PHOTOCONDUCTIVE ELEMENT BY THE FOCUSED LIGHT WILL DIRECTLY CONTROL THE AMOUNT OF CURRENT FLOWING TO SAID MICROAMMETER FROM THE POWER SOURCE TO PRODUCE A MICROAMMETER READING PROPORTIONAL TO THE INTENSITY OF THE FOCUSED LIGHT ENERGIZING THE PHOTO-CONDUCTIVE ELEMENT, SAID POWER SOURCE INCLUDING A PLURALITY OF INDIVIDUALLY CONTROLLABLE BATTERIES WIRED IN PARALLEL AND HAVING DIFFERENT VOLTAGES TO IMPOSE DIFFERENT ELECTRICAL POTENTIALS ON THE INDICATING CIRCUIT FOR MEASURING A PLURALITY OF RANGES OF LIGHT INTENSITIES.