Patent GB-1505660-A (GB)
Title: Cassette type magnetic tape recorder
IPC: G11B15/18
Filed: 1975-04-04
Abstract: 1505660 Cassette tape recorders AUTOVOX SpA 4 April 1975 [5 April 1974] 13915/75 Heading G5R A magnetic tape cassette recorder has a single manually operable control 13, Fig. 1, to effect mode selection; a cassette inserting and ejecting means 16, 18, 23 operable to automatically insert a cassette in response to partial insertion thereof and operable to eject the cassette; lowering and lifting means 27, 28, 37 capable of lowering a fully inserted cassette into its operating position and of lifting the cassette from its operating position; and means (72), Fig. 4 (not shown), responsive to relative movement between control 13 and a reciprocable slide 8 supporting control 13, for controlling the tape drive mechanism and the position of magnetic heads 49, 50 and a pinch roller 52. In a stop mode without a cassette 35 inserted, slide 8 is latched by anchor 96 in a pushed-in position with a pin 55 on a pivoted arm 48, which carries pinch roller 52 and heads 49, 50, in a narrower, forward part of slot 57 in slide 8. On inserting a cassette 35 via a slot (36), Fig. 2 (not shown), the cassette strikes an arm 21 of a cassette gripper 18, pivoted at 17 on a lever 16 (then at the dotted line position in Fig. 1) and rotates gripper 18 about pin 17 so that a front part (19), Fig. 4, of gripper 18 engages an edge of a side opening in cassette 35, the insertion of which also pivots lever 16 until a spring 23 goes over-centre thereby pivoting lever 16 to the full-line position, Fig. 1, and drawing in the cassette by gripper 18. Movement of the gripper 18 unlatches anchor 96 whereupon spring 11 moves slide 8 outwardly firstly causing a pin 45 thereon to rotate a member 37 to lower cassette 35 to its operative position, and then acting via pin 55 and slot 57 to pivot arm 48 to engage heads 49, 50 and pinch roller 52 with the tape and to cause a screw 91 on arm 48 to pivot a lever 90 to engage a friction clutch between a gear 88 and a take-up reel drive disc 87, the last part of the outward movement of slide 8 operating a microswitch to energize a motor 14 to drive capstan flywheel 84 and idler 85 via belt 86, idler 85 having a gear 89 driving disc 87 via gear 88 and said clutch. Recording is selected by pulling out, and then releasing, control handle 13 relative to slide 8 to change the electronic circuitry to record. Fast forward is selected by pivoting the front of handle 13 to the right relative to slide 8, whereby a hook (81) of a lever (72), Figs. 4, 11, 15 (not shown), pivots arm 48 to disengage the clutch and the heads 49, 50 and the pinch roller 52, and a pin 82, Fig. 14, on lever (72) pivots an arm 95 whereby gears 93, (94), Fig. 15, thereon engage disc 87 and flywheel 84 respectively, for fast drive of disc 87. Rewind is selected by pivoting handle 13 to the left relative to slide 8, whereby lever (72) pivots arm 48, to disengage the clutch, heads 49, 50 and pinch roller 52, and pivots arm 95 so that gears (94), 93, respectively, engage idler 85 and supply reel drive disc 92 for drive of the latter. Cassette ejection is effected by pushing in slide 8 whereby motor 14 is first de-energized, then slot 57 acts on pin 55 to retract arm 48 and thus disengage the clutch, heads 49, 50 and pinch roller 52, then pin 45 on slide 8 releases member 37 so that a spring 42 pivots the latter to a horizontal position thereby allowing springs 33, 34 to pivot C-shaped cross-pieces 27, 28 about pivots 29, 30 and 31, 32 to raise the cassette from its operative position, and then pin 26 on slide 8 rotates a cam 25 thereby loading spring 23 which thus pivots lever 16 causing cassette ejection by means of the arm 21 of the gripper 18 thereon, the forward movement of gripper 18 releasing anchor 96 so that the latter is caused by its spring to engage and latch slide 8 in the inward stop position thereof.