Hitachi, Ltd.

Hajime Yokota

Takao Terayama

Masashi Yoshida

Noboru Katohno

Hideo Nishijima

Masahiko Ibamoto

Nobuyuki Kaku

Isao Fukushima

Kazuo Sakai

Hideki Asano

Masao Okayama

Tatsuya Shigemura

Yoshihiro Shibata

Takamasa Hori

Mitsuji Aman

A magnetic tape loading apparatus has a rotatable cylindrical drum, tape guides, tape pulling movable members and guide members. The guide members guide the tape guide and control a posture of the tape guide by changing the position and the inclination.

Guide mechanism for positioning tape guides in a magnetic tape loading

A magnetic tape loading apparatus includes a magnetic tape take-out device slidingly movable on a base and tape take-out device control means of cam type provided on such a base, in order to maintain a predetermined positional relation between the magnetic tape and a rotational cylinder, when the magnetic tape contained within the cassette is taken out helically wound around the rotational cylinder or is stored into the cassette.

Guide mechanism for optimizing the position of a tape take-out device in

A magnetic tape loading apparatus includes a magnetic tape take-out device slidingly movable on a base and tape take-out device control means of cam type provided on such a base, in order to maintain a predetermined positional relation between the magnetic tape and a rotational cylinder, when the magnetic tape contained within the cassette is taken out as helically wound around the rotational cylinder or it is stored into the cassette.

A light-emitting element and light-receiving elements are embedded upright in a single printed wiring board for cooperating with one another in detecting the leader tape portion of a magnetic tape. Such a printed wiring board is fixed to a chassis by means of which a magnetic tape cassette is held in position. This arrangement enables a reduction in the number of leads and connectors, and hence greatly decreases the number of connections to the body of a magnetic recording and reproducing apparatus, thereby improving its adaptability with respect to automated assembly.

Magnetic recording and reproducing apparatus

A plurality of optical guide paths are built in a guide path plate. A plurality of optical guide posts are erected on the guide path plate so that each may oppose to one end of the corresponding optical guide path. The other end of at least one of the optical guide paths is optically connected to a light projecting portion, and the other end of at least another of the optical guide paths is optically connected to a light receiving portion. A part to-be-sensed which is movable is located between the distal ends of the optical guide posts whose base ends are connected to the corresponding optical guide paths. The presence of the part to-be-sensed is detected in such a way that the part to-be-sensed interrupts or transmits light which passes between the distal ends of the optical guide posts.

Photosensor employing optical guide posts to detect an object in the path

A magnetic recording and reproducing apparatus including a reel drive system having a first transmitting path for high-speed magnetic tape feed, and a second transmitting path for constant-speed magnetic tape feed. The first transmitting path includes a drive pulley for driving a pair of magnetic tape reels through oscillating idler means which is supported on a support shaft located on a bisector perpendicular to the center of the pair of magnetic tape reels to directly transmit the rotation of a reversible motor to the drive pulley. The second transmitting path transmits the rotation of the reversible motor through a slip mechanism to obtain a predetermined output torque. One of the two transmitting path is selected for each operation mode as switching of the operation modes is effected.

Reel drive system of magnetic recording and reproducing apparatus

A magnetic recording and reproducing apparatus having a single electromagnet for driving an idler mechanism for driving a take-up reel mount in a forward playback operation, a brake mechanism for a supply reel in a forward playback operation and a brake mechanism for the take-up reel mount. A high speed capstan-driven tape transport in both forward and reverse directions is attained by a simple construction.

Magnetic recording and reproducing apparatus enabling tape transport in

When operation mode is switched from recording to pause mode, a magnetic tape on which signals were recorded previously is slightly rewound backward by a predetermined length and is maintained in the pause mode operation state. When the pause condition is released, reproducing operation is performed to detect a phase difference between the reproduced control signal and a control signal of a video signal to be newly recorded. The tape speed is rapidly changed in accordance with the detected phase difference, so that the phase difference between the reproduced control signal and the control signal to be recorded is reduced to zero. Then, when a discontinuous scene recording is performed by switching from pause to recording operation mode, the phase coincidence has been achieved thereby enabling the phase-coincidence recording of video signals. Thus, upon reproducing, a clear picture with no disturbance can be presented even at the interconnection of signals for different scenes.

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Katsuta, Japan

Hajime Yokota