Patent GB-1421186-A (GB)
Title: Magnetic recording-reproducing device
IPC: G11B15/22
Filed: 1973-03-05
Abstract: 1421186 Controlling transport of record tapes; auto-stop devices; pause controls SHINSHIRASUNA ELECTRIC CORP 5 March 1973 10574/73 Heading G5R A cassette recorder having operating keys REW-FF each of which can be depressed and locked in an operative position to start a tape drive, includes an auto-stop mechanism which detects when one of reel spindles 15a, 15b has stopped and shuts off the tape drive by unlocking the operating keys. A pause control is also provided which, when operated, inhibits operation of the auto-stop mechanism. Auto-stop mechanism.-Rotation of the takeup spindle 15b is communicated by a belt 65, pulley 63 and a frictional member to pivot a member 62 about a shaft 61. The member 62 is also moved linearly parallel to an unlock bar 70 by a drive 53-60 from the tape drive motor 10, and pivoting the member 62 prevents a pin 66 thereon engaging an arm 77 of the unlock bar 70 during this linear motion. When the spindle 15b stops, the pin 66 confronts and engages the arm 77, sliding the bar 70 longitudinally. A pin 73 on the bar 70 causes a locking lever 11 to move in a perpendicular direction, releasing whichever key is depressed. In an alternative embodiment, Figs. 7A-7C (not shown), retraction of the unlock bar (170) causes pivotal movement of a member (94), which slides the lever 11 as above. Pause control.-On pivoting a pause control actuator 81, a rod 92 secured thereto pivots an arm 88 to engage a second pin 69 on the autcstop member 62, moving pin 66 to prevent engagement with the arm 77 and thus inhibiting the auto-stop. The actuator 81 also engages a pin 26a to disengage a pinch roller 21 from a capstan 18. A second pin 26b on the pinch roller assembly then engages a linkage 30 to disengage an idler 27 which transmits drive from the capstan 18 to the take-up reel 15b during normal forward transport. Fast forward or rewind transport.-On depressing the fast-forward key FF, a linkage 51, 52, Fig. 2, pulls a roller 38b into engagement with the capstan flywheel 19 and a coaxial roller (38a), Fig. 1 (not shown), into engagement with a roller 37 on the take-up spindle 15b, so that the latter is driven from the flywheel 19 rather than from the capstan 18. On depressing the rewind key REW, a linkage 44-47 again engages the roller 38b with the capstan flywheel 19, but coaxial roller (38a) now engages an idler (36), Fig. 1 (not shown), contacting a roller 35 on the supply spindle 15a, so that the latter is driven from the capstan flywheel 19. Other transport controls.-Depression of any key except the stop key STP pivots a plate (7), Fig. 1 (not shown), which via a rod (9) switches on the drive motor 10. The lever 11 has hooked portions 11a, 11b, 11d, 11e for locking any depressed key except the stop key, and depression of any key releases any previouslydepressed key; the stop key STP has no other function. Depression of the playback key PLY or record key REC moves heads (17), Fig. 1 (not shown), into engagement with the tape, and engages the pinch roller 21 with the capstan 18, and the idler roller 27 with the capstan 18 and with a roller 34 on the take-up spindle 15b.