GB1404320A - Recording tape devices - Google Patents

Abstract

1404320 Guiding endless record tapes DEFENCE SECRETARY OF STATE FOR 24 Nov 1972 [25 Nov 1971] 54816/71 Heading G5R An endless tape 3 is wound on a hollow spool 2 and is withdrawn from the inner turn to a guide assembly 4 which directs the tape out of the spool hollow to a second assembly 5 outside the spool, the assembly 5 restoring the tape to a path wherein its edges are coplanar with the edges of the tape on the spool and further being adjustable in position. The two guide assemblies 4, 5 include, in addition to 45 degree-inclined bars 14, 18, horizontal rollers 15, 17 which alter the plane of the tape so that it travels parallel to the spool between the assemblies 4, 5. The assembly 5 further includes a vertical roller 19. The tape is wound on a circular array of rollers 12. The apparatus includes first and second drives 6, 8 flanking two transducers 27, 28, each drive comprising a plurality of wheels 22-25, 30-33 driven by belts 26, 34. The tape 3 is sandwiched between belt 26 and wheel 22, and between belt 34 and wheel 30, the latter wheel being driven slightly faster than the former. Drive is transmitted from a motor 9 by a belt-and-pulley system, Fig. 3 (not shown), which also has provision for application of an external drive at a slotted shaft (56). Two pulleys (43, 44) between the shaft (56) and motor pulley (40) are interconnected by a ratchet-and-pawl device (60, 61), Figs. 4, 5 (not shown), which is such that the pawls are rotated by a high-speed external drive and under centrifugal force become disengaged, against spring bias (63), from the ratchet wheel (60), thus isolating the motor 9.