| 摘要 |
A magnetic tape recorder, particularly of the tape cassette type, has support spindles for the tape carrier reels, and these support spindles are provided with driving pulleys which are coupled to a rotary driving element, during forward and reverse movement of the tape, by intermediate driving gear connected with the driving pulleys. A torque responsive clutch is included in at least the intermediate driving gear connected to the support spindle operable to effect forward movement of the tape. The torque responsive clutch includes a driven member fixed to the support spindle and a driving member freely rotatable on the driven member. The driving and driven members are interconnected by a spring wire having one end conformingly fitted in a slot in one member and the other end extending into an annular recess in the other member and bent to engage detent recesses in the other member. When the two members slip over each other, they form an acoustic signal device warning that the tape has been completely unwound from one or the other of the two tape carrier reels. |
