Tape fast feed control apparatus

Claim 2

A tape fast feed control apparatus for an endless magnetic tape cartridge player comprising an induction motor for driving the magnetic tape, said induction motor having a first and second coil generating rotary magnetic fields different from each other when energized by a source of alternating electric current, said induction motor being adapted to drive the tape at normal speed when said first coil is energized by said source of electric current and to drive the tape at fast speed when said second coil is energized by said source of electric current; electric switch means for selecting one of said first or second coils, said electrical switch means being normally in a first position where said source of electric current is connected to said first coil, said electrical switch means being adapted to be manually changed over from said first position to a second position where said source of electric current is connected to said second coil; magnetic means for maintaining said electrical switch in said second position; and sensing means for detecting a nonsignal zone on the magnetic tape, and signal generating means responsive to said sensing means for generating a signal when said nonsignal zone is detected, said magnetic means being adapted to release retention of said electrical switch means in response to said signal to return said switch means from said second position to said first position.

Claim 3

A tape fast feed control apparatus for an endless magnetic tape cartridge player in accordance with claim 1 wherein said magnetic means comprises a pushbutton lever adapted to manually operate said electrical switch means, a permanent magnet secured to said pushbutton lever, two oppositely facing yokes attached to opposite pole-faces of said permanent magnet, a fixed mild steel plate normally spaced from the edges of said yokes, and an exciting coil wound to said fixed mild steel, said mild steel plate being adapted to be magnetically attracted to said yokes at their edges when said pushbutton lever is depressed to maintain said electrical switch means in said second position, and said mild steel plate being adapted to be released from magnetic attraction of said yokes to return said electrical switch means to said first position.

Claim 4

A tape fast feed control apparatus for an endless magnetic tape cartridge player in accordance with claim 1 wherein said magnetic means comprises a pushbutton lever adapted to manually operate said electrical switch means, a mild steel plate secured to said pushbutton lever, and fixed electromagnet means normally spaced from said mild steel plate, said mild steel plate being adapted to be magnetically attracted to said fixed electromagnet means when said pushbutton lever is depressed to maintain said electrical switch means in said second position, the magnetic force of said fixed electromagnet means being extinguished in response to said signal to return said electrical switch means to said first position.

Claim 5

A tape fast feed control apparatus for an endless magnetic tape cartridge plAyer comprising an induction motor for driving the magnetic tape, said induction motor having a first and second coil generating rotatory magnetic fields different from each other when energized by a source of alternating electric current, said induction motor being adapted to drive the tape at normal speed when said first coil is energized by said source of electric current, and to drive the tape at fast speed when said second coil is energized by said source of electric current; electrical switch means for selecting one of said first or second coils, said electrical switch means being normally in a first position where said source of electric power current is connected to said first coil, said electrical switch means being adapted to be manually changed over from said first position to a second position where said source of electric current is connected to said second coil; a lever for controlling actuation of said electrical switch means, said lever being secured to rotary shaft, said lever being adapted to move between an effective position to maintain said electrical switch means in said first position and a noneffective position to maintain said electrical switch means in said second position, said lever being adapted to be manually moved from said effective position to said noneffective position by manual rotation of said rotary shaft; lever return means connected to said rotary shaft for rotating said lever with said rotary shaft from said noneffective position to said effective position at a predetermined angle, said lever return means including solenoid means; and sensing means for detecting a nonsignal zone on the magnetic tape, and signal generating means responsive to said sensing means for generating a signal when said nonsignal zone is detected, said solenoid being adapted to rotate said rotary shaft through said predetermined angle each time said signal is applied to the solenoid to return said lever to said effective position, the lever return means being adapted to determine the number of signals to be applied to said solenoid in accordance with the degree of manual rotation of said lever away from said effective position.

Claim 6

A tape fast feed control apparatus for an endless magnetic tape cartridge plAyer comprising an induction motor for driving the magnetic tape, said induction motor having a first and second coil generating rotatory magnetic fields different from each other when energized by a source of alternating electric current, said induction motor being adapted to drive the tape at normal speed when said first coil is energized by said source of electric current, and to drive the tape at fast speed when said second coil is energized by said source of electric current; electrical switch means for selecting one of said first or second coils, said electrical switch means being normally in a first position where said source of electric power current is connected to said first coil, said electrical switch means being adapted to be manually changed over from said first position to a second position where said source of electric current is connected to said second coil; a lever for controlling actuation of said electrical switch means, said lever being secured to rotary shaft, said lever being adapted to move between an effective position to maintain said electrical switch means in said first position and a noneffective position to maintain said electrical switch means in said second position, said lever being adapted to be manually moved from said effective position to said noneffective position by manual rotation of said rotary shaft; lever return means connected to said rotary shaft for rotating said lever with said rotary shaft from said noneffective position to said effective position at a predetermined angle, said lever return means including solenoid means; and sensing means for detecting a nonsignal zone on the magnetic tape, and signal generating means responsive to said sensing means for generating a signal when said nonsignal zone is detected, said solenoid being adapted to rotate said rotary shaft through said predetermined angle each time said signal is applied to the solenoid to return said lever to said effective position, the lever return means being adapted to determine the number of signals to be applied to said solenoid in accordance with the degree of manual rotation of said lever away from said effective position.

Claim 7

A tape fast feed control apparatus for an endless magnetic tape cartridge player comprising an induction motor for driving the magnetic tape, said induction motor having a first and second coil generating rotatory magnetic fields different from each other when energized by a source of alternating electric current, said induction motor being adapted to drive the tape at normal speed when said first coil is energized by said source of electric current, and to drive the tape at fast speed when said second coil is energized by said source of electric current; electrical switch means for selecting one of said first or second coils, said electrical switch means being normally in a first position where said source of electric current is connected to said first coil, said electrical switch means being adapted to be manually changed over from said first position to a second position where said source of electric current is connected to said second coil; a rotary shaft rotatable by said induction motor and being also manually rotatable; and a lever for controlling actuation of said electrical switch means secured to said rotary shaft, said lever being adapted to be moved between an effective position to maintain said electrical switch means in said first position and a noneffective position to maintain said electrical switch means in said second position, said lever being adapted to be moved from said effective position to said noneffective position by manual rotation of said rotary shaft to thereby result in fast feed of the tape, said rotary shaft being adapted to be rotated with rotation of said induction motor to allow said lever to return from said noneffective position to said effective position to thereby result in normal feed of the tape.

Claim 8

A tape fast feed control apparatus for an endless magnetic tape cartridge player comprising an induction motor for driving the magnetic tape, said induction motor having a first and second coil generating rotatory magnetic fields different from each other when energized by a source of alternating electric current, said induction motor being adapted to drive the tape at normal speed when said first coil is energized by said source of electric current, and to drive the tape at fast speed when said second coil is energized by said source of electric current; electrical switch means for selecting one of said first or second coils, said electrical switch means being normally in a first position where said source of electric current is connected to said first coil, said electrical switch means being adapted to be manually changed over from said first position to a second position where said source of electric current is connected to said second coil; a rotary shaft rotatable by said induction motor and being also manually rotatable; and a lever for controlling actuation of said electrical switch means secured to said rotary shaft, said lever being adapted to be moved between an effective position to maintain said electrical switch means in said first position and a noneffective position to maintain said electrical switch means in said second position, said lever being adapted to be moved from said effective position to said noneffective position by manual rotation of said rotary shaft to thereby result in fast feed of the tape, said rotary shaft being adapted to be rotated with rotation of said induction motor to allow said lever to return from said noneffective position to said effective position to thereby result in normal feed of the tape.