Indexing film adapter for camera

Claim 1

MEANS TO INDEX THE SHIFT OF A FILM ADAPTER RELATIVE TO A CAMERA BODY IN RELATIVELY SMALL INCREMENTS AND IN RELATIVELY LARGE INCREMENTS SELECTIVELY TO DIVIDE FILM IN THE ADAPTER INTO IMAGE AREAS OF TWO DIFFERENT SIZED SELECTIVELY, COMPRISING: A FIRST INDEX MEANS ON ONE OF THE ADAPTER AND THE BODY ADJACENT ONE SIDE OF THE PATH OF RELATIVE MOVEMENT BETWEEN THE ADAPTER AND THE BODY: A SECOND INDEX MEANS ON SAID ONE OF THE ADAPTER AND THE BODY ADJACENT THE OTHER SIDE OF THE PATH OF RELATIVE MOVEMENT; AND A THIRD INDEX MEANS ON THE OTHER OF THE ADAPTER AND THE BODY FOR COOPERATION WITH THE FIRST AND SECOND INDEX MEANS SELECTIVELY, SAID THIRD INDEX MEANS BEING LOCATED ON ONE SIDE OF SAID OTHER OF SAID ADAPTER AND SAID BODY TO COOPERATE WITH THE FIRST INDEX MEANS AT ONE LONGITUDINAL ORIENTATION OF THE ADAPTED RELATIVE TO THE PATH AND TO COOPERATE WITH THE SECOND INDEX MEANS AT THE OTHER LONGITUDINAL ORIENTATION OF THE FILM ADAPTER RELATIVE TO THE PATH, EACH OF SAID FIRST AND SECOND INDEX MEANS FORMING A LONGITUDINAL CHANNEL WITH A LONGITUDINAL SERIES OF INDEX ELEMENTS ADJACENT ONE SIDE OF THE CHANNEL, THE SPACING OF THE SUCCESSIVE ELEMENTS OF ONE SIRIES BEING LARGER THAN THE SPACING OF THE SUCCESSIVE ELEMENTS OF THE OTHER SERIES, SAID THIRD INDEX MEANS HAVING AN INDEX MEMBER PIVOTED FOR ARCUATE MOVEMENT OF RELEASABLY ENGAGE THE INDEX ELEMENTS SELECTIVELY, EACH OF SAID CHANNELS BEING DIMENSIONED TO CURTAIL THE ARCUATE RELEASE MOVEMENT OF THE INDEX MEMBER TO PREVENT REMOVAL OF THE INDEX MEMBER FROM THE CHANNEL THEREBY TO LIMIT THE RANGE OF RELATIVE SHIFT OF THE FILM ADAPTER TO THE LENGTH OF THE CHANNEL; AND MANUALLY OPERABLE MEANS TO RELEASE THE INDEX MEMBER FROM EACH OF THE TWO CHANNELS TO PERMIT THE ADAPTED TO BE SHIFTED OUT OF ENGAGEMENT WITH THE CAMMERA BODY.