Control devices and valve constructions therefor or the like

Claim 1

A CONTROL DEVICE COMPRISING A CASING, SAID CASING HAVING A READING HEAD, SAID READING HEAD HAVING A READING SURFACE INTERRUPTED BY A PLURALITY OF PASSAGE MEANS, A BACKING MEMBER DISPOSED IN SAID CASING AND MOVABLE RELATIVE TO SAID READING SURFACE, A FLEXIBLE SHEET DISPOSED IN SLIDING ENGAGEMENT WITH SAID READING SURFACE, SAID SHEET HAVING A BLISTER PORTION PROVIDING A CHANNEL ADAPTED TO INTERCONNECT SAID PASSAGE MEANS WHEN SAID SHEET IS IN ONE POSITION THEREOF, SAID SHEET BEING OPERATIVELY INTERCONNECTED TO SAID BACKING MEMBER TO MOVE IN UNISON THEREWITH, A FLEXIBLE MEMBER DISPOSED BETWEEN SAID SHEET AND SAID BACKING MEMBER AND BEING UNDER COMPRESSION TO URGE SAID SHEET INTO SEALING RELATION WITH SAID READING SURFACE, AND A MOVABLE MEMBER CARRIED BY SAID CASING AND BEING ADAPTED TO ENGAGE AND MOVE SAID BACKING MEMBER RELATIVE TO SAID READING SURFACE, SAID MOVABLE MEMBER HAVING A LOST MOTION CONNECTED WITH SAID BACKING MAMBER WHEREBY SAID MOVABLE MEMBER INITIALLY MOVES RELATIVE TO SAID BACKING MEMBER BEFORE MOVING SAID VALVE MEMBER UPON FURTHER MOVEMENT OF SAID MOVABLE MEMBER.