Reducing camera

Claim 1

A REDUCING CAMERA FOR FORMING MICRO-IMAGES ON A TRANSPARENT PHOTOCHROMIC FILM, SAID CAMERA COMPRISING: A LONGITUDINAL BED; FIRST MEANS FOR SUPPORTING AN ORIGINAL RECORD ON SAID BED; A FIRST OPTICAL REDUCING SYSTEM HAVING A LIGHT SOURCE OF A FIRST WAVELENGTH BAND AND AN OBJECTIVE LENS MOUNTED ON ONE END OF SAID BED FOR PROJECTING A REDUCED IMAGE OF SAID ORIGINAL RECORD AT A FOCAL PLANE; A TRANSPARENT PHOTOCHROMIC FILM DISPOSED AT SAID FOCAL PLANE; SUPPORT MEANS MOUNTED ON SAID BED FOR SUPPORTING SAID PHOTOCHROMIC FILM AT SAID FOCAL PLANE; SECOND MEANS MOUNTED ON SAID OBJECTIVE LENS FOR JETTING A STREAM OF AIR AT A STEADY RATE OF SAID PHOTOCHROMIC FILM AND FOR FORMING AN AIR PRESSURE IN THE SUPPLY MEANS ON SAID AIR WHICH PRESSURE IS INVERSELY RELATED TO SPACING BETWEEN SAID OBJECTIVE LENS AND SAID PHOTOCHROMIC FILM; A SERVO-SYSTEM RESPONSIVE TO THE PRESSURE OF SAID AIR OF SAID SECOND MEANS TO MAINTAIN A SUBSTANTIALLY CONSTANT SPACING BETWEEN SAID OBJECTIVE LENS AND SAID FILM, SAID CONSTANT SPACING BEING CHOSEN OF A LENGTH SUCH THAT A PROPERLY FOCUSED REDUCED IMAGE OF SAID ORIGINAL RECORD IS FORMED ON SAID FILM; A SECOND OPTICAL REDUCING SYSTEM HAVING A LIGHT SOURCE OF A SECOND WAVELENGTH BAND MOUNTED ON THE OTHER END OF SAID BED OPPOSITE FROM SAID ONE END FOR PROJECTING A LIGHT SPOT ONTO SAID FILM TO PERMIT INSPECTION THEREOF AND TO PERMIT ERASURE OF SAID REDUCED IMAGE THEREON; AND INSPECTION MEANS FOR INTERCEPTING THE LIGHT OF SAID SECOND WAVELENGTH BAND TRANSMITTED THROUGH SAID FILM, WHEREBY THE IMAGE FORMED ON SAID FILM IS VISIBLE AND IS ABLE TO BE INSPECTED.