device for warning after exploration loop buffer pneumatic chambers in magnetic tape apparatus

摘要

1344311 Tape transport device SIEMENS AG 21 Sept 1971 [22 Sept 1970] 40267/71 Heading G3R A magnetic tape transport device has pneumatic buffer chambers 1, each with at least one pneumatic detector 2 controlling an associated tape reel drive, and a further two pneumatic detectors 3, which brake the tape and/or switch off the device upon under- or overloading of the chamber, a pressure differential switch 7 being connected to the two further detectors 3 to monitor their condition, operating to give a logic 'O' output when the loop is between said detectors 3. A signal to indicate that the loop is not between the detectors 3 may be obtained from an AND gate 9 Fig. 3 connected between the pressure differential switch 7 and a vacuum monitoring switch 8.