Abstract: Disclosed is a foot switch apparatus which is connected to a tape recorder, the tape recorder having a mode control circuit which designates its operation mode. The foot switch has an automatic back spacing circuit coupled to the mode control circuit. When the foot switch operates, a recording tape on the tape recorder is rewound by a predetermined length in response to an operation of the automatic back spacing circuit.

Abstract: The disclosed automatic backspace device, in a tape recorder or transcriber or the like, is rewound for a specific period of time. A transistor is turned on by an electrical current from a time constant circuit in response to tape reproduction seen by an operating switch. The transistor charges a capacitor which discharges a constant electrical current through a parallel-connected transistor in a current mirror circuit whose other transistor is supplied with a predetermined electrical current. Another transistor is turned on by the discharge current of the capacitor to carry out the rewinding of the magnetic tape.

Abstract: A motor brake device comprises a plurality of transistors for shunting a circuit loop through which a back electromotive force current caused by an inertia rotation of the motor flows, in which some of these transistors are operated as an inversed transistor (a transistor operated in a state where the collector and the emitter are interchanged with each other). The brake current for the motor flows through the collector-emitter paths of the transistor and the reversed transistor, each of which exhibits a small voltage drop. Therefore, the electromagnetic brake may effectively be applied to the motor even at a considerably low back electromotive force of the motor.

Abstract: Disclosed is a cue signal-recording apparatus which includes a motor for driving a recording tape, a generator which is connected to the motor and produces a first signal whose frequency corresponds to the running speed of the tape, and a circuit which is connected to the generator and records a second signal synchronized with the first signal on the tape. The second signal is used as a cue signal for indicating the position of particular data recorded on the tape.

Abstract: In a tape recorder including a circuit for generating pulses according to the running of a tape, an electronic counter circuit is provided which includes a counter for counting pulses and a display section for displaying its count value. The electronic counter circuit further includes a control circuit for disconnecting a display section from a power supply source a predetermined time period after the running of the tape is stopped and a memory for storing the count value at all times.

Abstract: A tape cassette lid opening device for a magnetic recording tape driving apparatus provided with a tape cassette loading section for receiving a tape cassette and a capstan projecting from the bottom surface of said tape cassette loading section, comprises a tape cassette lid and a tape cassette lid opening mechanism. The tape cassette lid is pivotally mounted on the magnetic recording tape driving apparatus and is pivotable between a first position, in which the tape cassette lid covers the tape cassette loading section, and a second position, in which the tape cassette lid permits the loading of said tape cassette into the tape cassette loading section and unloading of the tape cassette from the tape cassette loading section. The tape cassette lid opening mechanism includes a motor which causes the pivotal motion of the tape cassette lid from said first position to said second position by means of the driving force of the motor.

Abstract: In a tape recorder including a circuit for generating a pulse signal corresponding to an amount of tape travel, an electronic counter circuit is provided which includes a counter for counting pulses and a display section for displaying a count value. The electronic counter circuit further includes a memory for receiving voltage at all times from a power supply and storing a count value and a control section adapted to maintain the energization of the display section for a predetermined time period after the operation of the tape recorder is stopped and to stop the energization of the display section thereafter, while inhibiting the resetting of the counter.

Abstract: In a tape recorder, which has a circuit for producing pulses according to the running of a tape, there is provided an electronic counter circuit having a counter for counting pulses produced from that circuit and a display section for displaying the count. The electronic counter circuit includes a missing-pulse detector for detecting the pulse interval of the output pulse signal of the pulse generating circuit and producing a detection signal when the detected pulse interval exceeds a predetermined interval, a circuit for producing an alarm for a predetermined period of time according to the output signal of the missing-pulse detector, and a circuit for supplying a rotation stop signal to a motor of the tape recorder according to the output signal of the missing-pulse detector.

Abstract: A tape end detection apparatus for a tape deck comprise a tape transport detection means which generates a first pulse in accordance with the transport of a tape. This apparatus further comprises a timer circuit means which does not operate to detect a terminal end of the tape during a period beginning from the start of a tape transport to the lapse of a first specified period of time, and which operates to detect, after the passage of the first specified period of time, the terminal end of the tape in accordance with the existence of the first pulse.

Abstract: A mode switching circuit has external terminals, a mode selection means for selecting a mode in accordance with the kind of a signal applied to the terminals, and a means for designating a mode selection state in the mode selection means by a mode selection signal. The external terminals are used commonly for a plural kinds of signals.

Abstract: A tape recorder with electronic counter having a counter portion (14) furnished with power from a first battery (18) and serving to display the extent of tape drive, a tape recorder portion (20) furnished with power from a second battery (22) and switched from one operation mode over to another according to the count value in the counter portion (14) and a switch (17) for permitting the power supply to the counter portion (14) from the second battery (22) when the counter portion (14) becomes inoperative with the exhaustion of the first battery (18).

Abstract: An operation mode display apparatus comprises first and second display means (LED1 and LED2) capable of being operated independently of each other and a display state specifying means for specifying the display states of said first and second display means corresponding to an operation mode of a tape recorder. At least three operation modes of said tape recorder can be displayed by corresponding combinations of the display states of the first and second display means (LED1 and LED2).