| 摘要 |
952,605. Self-threading tape recorders. MINNESOTA MINING & MANUFACTURING CO. April 1, 1960 [May 18, 1959], No. 11612/60. Heading G5R. The take-up spool 21 of a magnetic tape recorder for narrow, pre-recorded tapes has bifurcate feelers 20 whose path intersects the outline of a a cassette 13 and engage a mouse 19 attached to the leading end of the tape and guide it to a recess 95 in the spool 21. Cut-outs 52, 53, 54, 57 in the canette admit a head 16, tape guides 55, 56 and a capstan 18 and pinch-roller 17, engaged therewith, when the handlever 28 is in the PLAY position. A drive motor 26 drives the capstan 18 via a drive-filter means 27 (detailed in Fig. 2, not shown) while a winding motor 22 is rocked into position to drive the spool 21 via the path 23, 24, 25, which includes slipping drive means. In the NEUTRAL position cam means (Fig. 4, not shown) retract the capstan 18 below the deck 11 and an arm 80 retracts the pinch-roller 17 for easy cassette loading. The take-up spool drive connection is also broken. In the REWIND position, the capstan and pinchroller remain retracted and the motor 22 provides fast rewind via the path 29, 30, 108, which also includes slipping drive means to prevent tearing off the mouse 19. The cassette contains a lightly sprung felt disc (Fig. 1B, not shown) which provides feed tension and prevents tape-spillage.
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