Radiation detection devices

Claim 1

A PHOTOGRAPHIC DEVICE FOR RECORDING RADIATION DOSES, SAID DEVICE COMPRISING A HOUSING HAVING A FRONT PORTION, AN INTERMEDIATE PORTION AND A REAR PORTION, GUIDE MEANS ON SAID FRONT PORTION FOR PREDETERMINEDLY POSITIONING A PHOTOSENSITIVE SHEET WITHIN SAID HOUSING, SAID INTERMEDIATE PORTION BEING PIVOTALLY MOUNTED ON SAID FRONT PORTION ONE SIDE OF SAID GUIDE MEANS, SAID REAR PORTION BEING PIVOTALLY MOUNTED ON SAID FRONT PORTION ON THE OTHER SIDE OF SAID GUIDE MEANS, SAID FRONT PORTION, SAID INTERMEDIATE PORTION AND SAID REAR PORTION BEING COMPOSED OF MATERIALS WHICH DO NOT APPRECIABLY ALTER THE ACTINIC EFFECT OF X AND GAMMA RADIATION ON SAID PHOTOSENSITIVE SHEET. A FIRST GROUP OF RADIATION-DISCRIMINATING ELEMENTS MOUNTED ON SAID FRONT PORTION, SAID RADIATION-DISCRIMATING ELEMENTS IN SAID FIRST GROUP HAVING SURFACES DISPOSED SUBSTANTIALLY IN A FIRST PLANE, A SECOND GROUP OF RADIATIONDISCRIMINATING ELEMENTS MOUNTED ON SAID INTERMEDIATE PORTION, SAID SECOND GROUP OF RADIATION-DISCRIMINATING ELEMENTS HAVING SURFACES DISPOSED SUBSTANTIALLY IN A SECOND PLANE, AT LEAST ONE OF SAID ELEMENTS OF SAID FIRST GROUP AND AT LEAST ONE OF SAID ELEMENTS OF SAID SECOND GROUP BEING COMPOSED OF A MATERIAL WHICH APPRECIABLY DIMINISHES THE ACTINIC EFFECT OF X- AND GAMMA RADIATION ON SAID PHOTOSENSITIVE SHEET, AT LEAST ONE OF SAID ELEMENTS OF SAID FIRST GROUP AND AT LEAST ONE OF SAID ELEMENTS OF SAID SECOND GROUP BEING COMPOSED OF A MATERIAL WHICH APPRECIABLY INCREASES THE ACTINIC EFFECT OF X- AND GAMMA RADIATION ON SAID PHOTOSENSITIVE SHEET, A PAIR OF PRESSURE-APPLYING MEMBERS, ONE OF SAID PRESSURE-APPLYING MEMBERS BEING MOUNTED ON SAID INTERMEDIATE PORTION, THE OTHER OF SAID PRESSURE-APPLYING MEMBERS BEING MOUNTED ON SAID REAR PORTION, SAID REAR PORTION, PROVIDING ACCESS TO THE INTERIOR WHEN IN OPEN POSITION, PROVIDING ACCESS TO THE INTERIOR OF SAID HOUSING, SAID INTERMEDIATE PORTION, WHEN IN CLOSED POSITION, DEFINING, IN CONJUNCTION WITH SAID FRONT PORTION, AN EXPOSURE CHAMBER, SAID FIRST PLANE AND SAID SECOND PLANE BEING CLOSELY SUPERPOSED WITHIN SAID EXPOSURE CHAMBER AND GIVEN RADIATION-DISCRIMINATING ELEMENTS OF SAID FIRST GROUP BEING ALIGNED WITH SIMILAR RADIATION-DISCRIMINATING ELEMENTS OF SAID SECOND GROUP WHEN SAID INTERMEDIATE PORTION IS IN CLOSED POSITION, SAID PRESSUREAPPLYING MEMBERS, WHEN SAID REAR PORTION AND SAID INTERMEDIATE PORTION ARE IN CLOSED POSITION, BEING CAPABLE OF RECEIVING THEREBETWEEN OTHER SHEET IN SUPERPOSED RELATION AND BEING CAPABLE OF FORMING THEREFROM A SANDWICH BY SPREADING A THIN LAYER OF PROCESSING COMPOSITION BETWEEN SAID SHEETS, SAID REAR PORTION AND SAID INTERMEDIATE PORTION, WHEN IN CLOSED POSITION, DEFINING A PROCESSING CHAMBER ADAPTED TO RECEIVE SAID SANDWICH FROM SAID PRESSURE-APPLYING MEMBERS, SAID PROCESSING CHAMBER HAVING A MOUTH AT SAID OPPOSITE SIDE OF SAID FRONT PORTION THROUGH WHICH SAID SANDWICH MAY BE REMOVED FROM SAID PROCESSING CHAMBER.