Patent GB-1478528-A (GB)
Title: Mode selecting devices for tape recording and/or reproducing apparatus
IPC: G11B15/10
Filed: 1974-11-19
Abstract: 1478528 Mode selection in tape recorders SONY CORP 19 Nov 1974 [24 Nov 1973] 50121/74 Heading G5R Depression of any selected one of a plurality of mode selecting push-buttons (1) to (4), Figs. 1 to 4 (not shown), in a tape recording and/or playback apparatus causes a corresponding one of a plurality of interlocking members 64 to 67, Fig. 8, to effect engagement between a corresponding one of a plurality of mode selecting members 53 to 56 and an operating member 57a, 57b, whereby movement of the member 57a, 57b by means of an electrically energizable driving means 84, Fig. 10, causes movement of the selected member 53 to 56 to bring about the selected mode of operation. Depression of any one of a fast forward (1),  normal forward (2), rewind (3) and tape-cassette eject button (4) moves a corresponding slider 7, 8, 9 or 10, Fig. 7, down to become locked in its operative position by a locking member 13 on the slider engaging a pivoted locking bar 14, and the slider movement shifts one or the other of two malfunction preventing slides 22, 23 which operate to prevent depression of another pushbutton while the selected one is locked in its operative position, and to prevent two simultaneously depressed pushbuttons becoming locked in their operative positions. Operation of the selected slider 7, 8, 9 or 10 acts via a link 69 between the corresponding member 13 and the corresponding interlocking member 64, 65, 66 or 67 so that a stub 64b, 65b 66b or 67b Fig, 8, thereof, engages in a corresponding hole 79 of an upper plate 57a of the operating member, and a pin 64a, 65a, 66a or 67a thereof, sliding in a cylindrical part 74, 75, 76 or 77 fixed to the corresponding mode selector 53, 54, 55 or 56, engages in a corresponding hole 80 of a lower plate 57b of the operating member whereby movement of the operating member by a solenoid 84, Fig. 10, forming the driving means effects sliding of the selected member 53, 54, 55 or 56. The selectors 53 to 56 have end parts 53a to 56a coupled to relevant parts of the tape recorder to bring about the corresponding operating mode. The depression of the selected slider 7, 8, 9 or 10 pivots, via projections 44 and fingers 41a, Fig. 7, a plate 41 whereby a spring 45 closes a microswitch MSW. Depression of slider 7, 8, 9 or 10 also closes a corresponding switch SW 1 , SW 2 , SW 3  or SW 4  due to an operating member SW<SP>1</SP> 1 , SW<SP>1</SP> 2 , SW<SP>1</SP> 3  or SW<SP>1</SP> 4  engaging in an aperture 49 in such slider. Switches SW 1  to SW 4  are in parallel with one another and in series with switch MSW. Solenoid 84 is engergized via a transistorized circuit, Fig. 11 (not shown), when one of SW 1  to SW 4  is closed simultaneously with MSW and pivots an interlocking plate 86, Fig. 10, about pin 85 so that the operating member 57a, 57b and the engaged selector 53, 54, 55 or 56 are moved in direction c to put the tape recorder in the corresponding mode, such position being locked by a pin 99 on a stop plate 96 engaging a hook 100 pivoted on plate 86. So that continued energization of solenoid 84 is not required. When a stop button (S) is depressed, a stop slide 11 pivots the locking bar 14 to release the selected one of sliders 7 to 10 for return by spring 12 to its rest position, and a solenoid 95, Fig. 10, is momentarily energized to pivot stop plate 96 thus putting the tape recorder in the stop mode via parts (not shown) coupled to plate 96 and releasing pin 99 from hook 100 whereby spring 92 pviots plate 86 to return operating member 57a, 57b and the engaged selector 53, 54, 55, or 56 in direction d to their rest position, a spring 73, Fig. 7, then acting on the corresponding link 69 to withdraw pin 64a, 65a, 66a or 67a from hole 80 in plate 57b and stub 64b, 65b, 66b or 67b from the hole 79 in plate 57a to disengage the relevant one of selectors 53 to 56 from operating member 57a, 57b.