Method and apparatus for measurement of temperature

Claim 1

A DEVICE FOR MEASURING THE TEMPERATURE OF A FURNACE CHARGE BY RADIATION FROM A PREDETERMINED RADIATION SURFACE AREA WHICH COMPRISES A CLOSED RECTANGULAR CASING HAVING END AND SIDE WALLS AND A PARTITION IN PARALLEL ADJACENT RELATION TO ONE OF SAID END WALLS, A LENS MOUNTED IN SAID PARTITION, A WINDOW IN SAID END WALL ADJACENT SAID PARTITION IN LONGITUDINAL ALIGNMENT WITH SAID LENS TO PERMIT PASSAGE THERETHROUGH OF A RADIATION BEAM FROM SAID CHARGE VARIABLE IN CROSS-SECTIONAL AREA IN ACCORDANCE WITH THE OPTICAL DISTANCE TO SAID RADIATION SURFACE AREA FOR RECEPTION BY SAID LENS, A LIGHT SENSITIVE DEVICE HAVING AN EXCITATION SURFACE MOUNTED ON THE OTHER OF SAID END WALLS IN SPACED RELATION THERETO HAVING A RECEIVING AREA OF A PREDETERMINED PROPORTIONAL TO SAID RADIATION SURFACE AREA, BEAM REFLECTING MEANS IN SAID CASING FOR DIRECTING SAID BEAM ONTO SAID EXCITATION SURFACE TO EFFECTIVELY INCREASE THE OPTICAL DISTANCE BETWEEN SAID EXCITATION SURFACE AND SAID LENS, MEANS FOR ADJUSTING THE POSITION OF SAID LIGHT SENSITIVE DEVICE WITH RESPECT TO SAID OTHER END WALL TO VARY THE EFFECTIVE DISTANCE OF SAID EXCITATION SURFACE FROM SAID LENS TO MAINTAIN A PREDETERMINED DISTANCE RATIO FROM SAID LENS TO EXCITATION SURFACE AND LENS TO RADIATION SURFACE AREA, A VALVE MEMBER MOUNTED DIRECTLY ON SAID LIGHT SENSITIVE DEVICE AND HAVING A PORTION OVERLYING SAID EXCITATION SURFACE AND AN APERTURE IN SAID PORTION IN AXIAL ALIGNMENT WITH SAID EXCITATION SURFACE TO DEFINE SAID RECEIVING AREA, SAID APERTURE THEREBY HAVING A SMALLER CROSS SECTIONAL RECEIVING AREA THAN THAT OF SAID EXCITATION SURFACE, AND MEANS, FOR SIGHTING SAID LIGHT SENSITIVE DEVICE COMPRISING A TUBULAR EXTENSION EXTENDING ANGULARLY FROM ONE OF SAID SIDE WALLS AND HAVING AN AXIS INTERSECTING THE AXIS OF SAID LIGHT SENSITIVE DEVICE, AND A WINDOW IN SAID EXTENSION IN AXIAL ALIGNMENT WITH THE AXIS THEREOF.

Claim 2

A DEVICE FOR MEASURING THE TEMPERATURE OF A FURNACE CHARGE BY RADIATION FROM A PREDETERMINED RADIATION SURFACE AREA WHICH COMPRISES A CLOSED RECTANGULAR CASING HAVING END AND SIDE WALLS AND A PARTITION IN PARALLEL ADJACENT RELATION TO ONE OF SAID END WALLS, A LENS MOUNTED IN SAID PARTITION, A WINDOW IN SAID END WALL ADJACENT SAID PARTITION IN LONGITUDINAL ALIGNMENT WITH SAID LENS TO PERMIT PASSAGE THERETHROUGH OF A RADIATION BEAM FROM SAID CHARGE VARIABLE IN CROSS-SECTIONAL AREA IN ACCORDANCE WITH THE OPTICAL DISTANCE TO SAID RADIATION SURFACE AREA FOR RECEPTION BY SAID LENS, A LIGHT SENSITIVE DEVICE HAVING AN EXCITATION SURFACE MOUNTED ON THE OTHER OF SAID END WALLS IN SPACED RELATION THERETO HAVING A RECEIVING AREA OF A PREDETERMINED PROPORTIONAL TO SAID RADIATION SURFACE AREA, BEAM REFLECTING MEANS IN SAID CASING FOR DIRECTING SAID BEAM ONTO SAID EXCITATION SURFACE TO EFFECTIVELY INCREASE THE OPTICAL DISTANCE BETWEEN SAID EXCITATION SURFACE AND SAID LENS, MEANS FOR ADJUSTING THE POSITION OF SAID LIGHT SENSITIVE DEVICE WITH RESPECT TO SAID OTHER END WALL TO VARY THE EFFECTIVE DISTANCE OF SAID EXCITATION SURFACE FROM SAID LENS TO MAINTAIN A PREDETERMINED DISTANCE RATIO FROM SAID LENS TO EXCITATION SURFACE AND LENS TO RADIATION SURFACE AREA, A VALVE MEMBER MOUNTED DIRECTLY ON SAID LIGHT SENSITIVE DEVICE AND HAVING A PORTION OVERLYING SAID EXCITATION SURFACE AND AN APERTURE IN SAID PORTION IN AXIAL ALIGNMENT WITH SAID EXCITATION SURFACE TO DEFINE SAID RECEIVING AREA, SAID APERTURE THEREBY HAVING A SMALLER CROSS SECTIONAL RECEIVING AREA THAN THAT OF SAID EXCITATION SURFACE, AND MEANS, FOR SIGHTING SAID LIGHT SENSITIVE DEVICE COMPRISING A TUBULAR EXTENSION EXTENDING ANGULARLY FROM ONE OF SAID SIDE WALLS AND HAVING AN AXIS INTERSECTING THE AXIS OF SAID LIGHT SENSITIVE DEVICE, AND A WINDOW IN SAID EXTENSION IN AXIAL ALIGNMENT WITH THE AXIS THEREOF.