TAPE DECK WITH TAKE-UP REEL ROTATION SENSOR CONFIGURED TO PREVENT TAPE WINDUP ON THE CAPSTAN OR PINCH ROLLER

摘要

PCT No. PCT/US83/01768 Sec. 371 Date Nov. 9, 1983 Sec. 102(e) Date Nov. 9, 1983 PCT Filed Nov. 9, 1983.A tape deck, which incorporates a non-contacting take-up reel rotation sensing means and associated sensing circuit for enabling the capstan and take-up reel drive mechanism. A magnetic field sensor is positioned across an air gap from a take-up reel mounted magnet to sense the pulsating magnetic field and control operation of the sensing circuit. A magnetic field interrupting means is caused to assume a non-interrupting position when the take-up reel is rotated in its proper direction and to assume a magnetic field interrupting position between the magnetic and the magnetic field sensor when the take-up reel and magnet are caused to be rotated in the opposite direction.