Heliotropic device with thermocouple sensors

Claim 1

A HELIOTROPIC DEVICE FOR MAINTAINING THE OPTICAL AXIS OF A SOLAR RADIATION RECEPTOR IN ALIGNMENT WITH THE CENTER OF THE SUN, COMPRISING: A PAIR OF SERVOMOTORS FOR ROTATING SAID RECEPTOR IN EITHER DIRECTION ABOUT A PAIR OF ORTHOGONAL AXES; AN ELECTRO-OPTICAL ALIGNMENT ERROR SENSOR RIGIDLY ATTACHED TO SAID RECEPTOR; SAID SENSOR COMPRISING A FOCUSING MEANS, HAVING AN OPTICAL AXIS PARALLEL TO THE OPTICAL AXIS OF SAID RECEPTOR, FOR BRINGING THE SOLAR RAYS TO FOCUS AT A FOCAL PLANE, THE RAYS BEING BROUGHT TO FOCUS DEFINING AND BEING CONTAINED WITHIN A TRUNCATED CONE EXTENDING FROM SAID FOCUSING MEANS TO SAID FOCAL PLANE AND CENTERED ON THE OPTICAL AXIS OF SAID FOCUSING MEANS WHEN SAID AXIS HAS ZERO ALIGNMENT ERROR WITH THE CENTER OF THE SUN; FOUR THERMOCOUPLE TRANSDUCERS LOCATED ON THE CIRCUMFERENCE OF A CIRCLE THAT IS CENTERED ON AND NORMAL TO THE OPTICAL AXIS OF SAID FOCUSING MEANS THAT IS SITUATED BETWEEN SAID FOCUSING MEANS AND SAID FOCAL PLANE AND THAT HAS A DIAMETER ONLY SLIGHTLY GREATER THAN THE DIAMETER OF SAID CONE AT SAID CIRCLE, SAID TRANSDUCERS BEING LOCATED ON THE CIRCUMFERENCE OF SAID CIRCLE AT THE POINTS OF INTERSECTION THEREWITH OF TWO ORTHOGONAL DIAMETERS OF SAID CIRCLE EACH NORMAL TO ONE OF SAID ORTHOGONAL AXES; A PAIR OF CONTROL CIRCUITS FOR SAID SERVOMOTORS; AND A PAIR OF ERROR SIGNAL CIRCUITS EACH CONTAINING TWO DIAMETRICALLY OPPOSITE TRANSDUCERS CONNECTED IN SERIES OPPOSED RELATIONSHIP AND EACH CONNECTED TO ONE OF SAID SERVOMOTOR CONTROL CIRCUITS TO SUPPLY AN ERROR SIGNAL THERETO.