| 摘要 |
A new Clock Style Counter Attachment for providing a playing time readout of magnetic tape cassettes using an analog clock timer facing. The inventive device includes an add on gear disposed around a rotating drive shaft of a cassette playing device, a transmission drive shaft having a transmission gear at one end and a drive slot gear at its other end, and a timer having a timing gear system and a time display mechanism. The transmission gear operatively engaging the add on gear to rotate the transmission drive, and the drive slot gear operatively engaging a timing gear system. The timing gear system is operatively connected to the time display mechanism which displays the length of time a magnetic tape cassette has played in the magnetic tape cassette playing device.
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