Patent GB-1491056-A (GB)
Title: Magnetic tape recording and/or playback apparatus
IPC: G11B15/44
Filed: 1975-01-09
Abstract: 1491056 Cassette tape recorders FUNAI ELECTRIC CO Ltd 9 Jan 1975 [19 July 1974 (5)] 990/75 Heading G5R A reel-to-reel magnetic tape recorder and/or player has a motor 18 driving capstans 8, 9 and associated flywheels 19, 20 in opposite directions to one another for tape transport in selectively either direction, the tape reel shafts 5, 6 being selectively driven for tape take up during such transport by an idler 15 driven by motor 18, and an electromagnetic actuator 24 is energized in response to a sensor 25 sensing either end of the tape to move a plate 27 in a first direction into the path of a pin 28 on flywheel 19 whereby the pin 28 moves the plate 27 in a second direction, plate 27 then acting via a link plate 37 and a changeover plate 31 connected to idler 15 so that each successive movement of plate 27 in the second direction moves idler 15 from its current position driving one or the other of reel shafts 5, 6 to its other position to drive the other or the one of reel shafts 5, 6 respectively to reverse the tape winding direction. On insertion of a tape cassette 1 into a holder 76, Fig. 19, the cassette moves a plate 84 against action of spring 87 to release plate 84 from pin 85 whereupon springs 82, (81), Figs. 18, 20, 21 (not shown), pull holder 76 down to an operative position, such downward movement rotating a hook plate 68 whereby a shoulder 68a thereof is detached from a plate 66 to allow a spring 65, Fig. 13, to move plate 66 and a plate 64, carrying magnetic head 12 and pinch rollers 10, 11, to operative positions in which roller 11 co-operates with capstan 9 and idler roller 15 rotates reel shaft 6 to drive the magnetic tape 2 to the right. When a sensor 25, Fig. 1, senses the left end of the tape, actuator 24 is energized to pivot the plate 27, about an axis parallel to the plane of Fig. 1, into the path of pin 28 on capstan flywheel 19 so that pin 28 pivots plate 27 towards a holding magnetic yoke 30. Such movement of plate 27 shifts link plate 37 which acts through hooks 38, 39 thereon and pins 33, 34 on change-over plate 31 to pivot the latter whereby a pin (44), Fig. 5 (not shown), thereon disengages roller 11 from capstan 9 and engages pinch roller 10 with capstan 8 simultaneously with pivoting of a lever 35 to cause idler 15 to rotate reel shaft 5 via reversing roller 17 to drive the tape to the left. The tape drive direction is again reversed when sensor 25 senses the right end of the tape, and so on. Pushing in of fast wind slider 49 or 50, Fig. 13, disengages the capstan drive and head 12 from tape 2 and engages pairs of rollers 47 or 48, respectively, between flywheel 19 or 20, respectively, and reel shaft 5 or 6, respectively, for fast winding to the left or right. A locking arm 57 retains sliders 49, 50 in their operative position. Pushing in of one slider 49 or 50 while the other is in its operative position acts via interlock lever 61 to release the other slider. When during fast wind sensor 25 detects the tape end, the operation of actuator 24 causes pin 28 on flywheel 19 to pivot plate 27 which pivots a restoring plate (58), Fig. 9 (not shown), to shift locking arm 57 and allow slider 49 or 50 to be returned to its inoperative position by spring 55 or 56. Pushing in of a stop slider 71 first causes a part 72 thereof to shift arm 57 to release fast wind slider 49 or 50, if operated, then a part 74 of slider 71 engages a tongue 73 of plate 66 to move plate 66 into engagement with shoulder 68a of hook plate 68 and to move plate 64, and thus head 12 and pinch roller 10, 11, away from the cassette 1, and then a part 75, Fig. 19, of slider 71 pivots an ejecting arm 70 to raise holder 76 and cassette 1 therein from the operative position, and spring 87 then pulls plate 84 to eject the cassette 1 from holder 76.