Abstract:
A magnetic memory comprises a base (11), a spindle (31) upstanding therefrom, a motor comprising a stator 34 and a rotor 52, 56, a hub 37 mounted on bearings 41, 42 to rotate relative to the spindle, a pack of magnetic discs mounted on the hub, magneitc heads 65 for recording or playing back information on the disc, a drum 71 mounted on the hub and magnetic heads 81 mounted on the spindle, for recording or playing back tracks on a tape supported by the drum.
Abstract:
A magnetic tape drive for reading and writing data on magnetic tape in a cartridge (10) of the type in which a driven roller (11) in the cartridge (10) moves tape towards a read/write head (13) and the drive has a one-piece molded chassis (17). The chassis (17) is suspended at three points in a pan (19). At each point an interference fit between a planar mounting member (20, 22, 24) on the chassis and a slot (25-27) in a support member (28-30) in the pan (19) provides an easy snap-in mounting for the chassis (17).
Abstract:
An apparatus of the helical scan type is disclosed for reproducing a digital video signal from slant tracks (T) on a record carrier (20). The digital video signal has been recorded in first track portions (TP1) of the tracks. In an edit mode, said digital video signal is reproduced from said first track portions and a corresponding digital audio signal is recorded in second track portions (TP2) of the tracks. The apparatus comprises at least one read head (RH) for reading the digital video signal recorded in said first track portions of the tracks and at least one write head (WH) for writing the second channel signal in said second track portions. The read head (RH) and the write head (WH) are positioned on a rotatable head drum (44) at such a location relative to each other that when the read head reads the digital video signal from a first track portion of a first track (Ti+24), the write head writes said second channel signal in a second track portion in a second track (Ti), said second track being spaced a specified number (24) of tracks away from said first track.
Abstract:
A magnetic tape (2) and an apparatus (1) for cooperation with this magnetic tape (2) are configured in such a manner that video signals and audio signals can be stored in an inclined-track zone (67) and that a control signal (D-CTL signal) of a given frequency f1 can be stored in a first longitudinal track (24), which is in fact intended for recording analog audio signals, and that an additional control signal (X-CTL signal) of another frequency f2 can be stored in a second longitudinal track (26) on the magnetic tape (2), the additional control signal (X-CTL signal) being reproduced from the second longitudinal track (26) when such a magnetic tape (2) is loaded into a video recorder (1) in accordance with the VHS standard or into a video recorder (1) in accordance with the invention, which is also capable of recording and reproducing analog video signals in accordance with the VHS standard in inclined tracks, which reproduced additional control signal is applied to a speed control device for a capstan, which results in a tape speed deviating from normal operation and precludes an undesirable signal reproduction.
Abstract:
A magnetic tape (2) and an apparatus (1) for cooperation with this magnetic tape (2) are configured in such a manner that video signals and audio signals can be stored in an inclined-track zone (67) and that a control signal (D-CTL signal) can be stored in a control signal track (26) on the magnetic tape (2), for which the length L(D) of a recorded signal period is equal to the value, divided by N, of the distance D(D) in the longitudinal direction (3) of the tape between two inclined tracks (63) which can be scanned by the same magnetic head (D3), the control signal (D-CTL signal) being reproduced from the control signal track (26) when such a magnetic tape (2) is loaded into a video recorder (1) in accordance with the VHS standard or into a video recorder (1) in accordance with the invention, which is also capable of recording and reproducing analog video signals in accordance with the VHS standard, which reproduced control signal is applied to a speed control device for a capstan, which results in a tape speed deviating from normal operation and precludes undesirable signal reproduction.
Abstract:
Disclosed is a reading apparatus (Figure 4) capable of reading information recorded on a first longitudinal recording medium, according to a first format, at a first track pitch and having a first track width, the information being read at a given tape velocity, whereby the information can be read from the first medium at a first bit rate. Immediately adjacent tracks exhibit mutually different ones of a first and a second azimuth angles and pilot tones are recorded in information tracks, the frequency of the recorded tones cycling through at least two different frequencies (f1, f2), the reading apparatus comprising at least one read head (11) having the first azimuth angle and at least one read head (12) having the second azimuth angle. The reading apparatus is further adapted to read information recorded on a second longitudinal recording medium, in accordance with a second format (Figure 3) in which the information track pitch is substantially twice the first track pitch, the information track width is greater than the first track width, the tracks on the second medium being read by the reading apparatus at said given velocity, whereby the information may be read from the second medium at substantially half the first bit rate, all of the information tracks on the second medium exhibiting the same azimuth angle, this angle being one of the first and second azimuth angles, all of the information tracks having a pilot tone recorded therein, immediately adjacent tracks containing pilot tones having mutually different ones of at least two frequencies (f1, f2). The adaptation to read information recorded in accordance with the second format comprises the provision of control means (470) which control the apparatus to read information using only the read head (11) exhibiting the same azimuth angle as the information tracks present on the second medium, and to use the other read head (12) only to provide tracking control. A tape in the new format (Figure 3), and a recording apparatus (Figure 5) for producing a tape in the new format are also disclosed.
Abstract:
For the recording and/or reading of magnetic tracks in a magnetic tape apparatus with a rotary head wheel (1) displaced transversely with respect to the unwinding direction of the tape and on which are arranged 2n magnetic heads (K), the rotary head wheel is moved by a control by means of an electromagnetic converter (3) in the direction of its rotational axis.