DE1036527B - Setup on home magnetic tape recorders - Google Patents

Description

GERMAN

The invention relates to improvements in apparatus for magnetic sound recording and reproduction, especially with the use of ribbons.

For lifelike sound reproduction, which is achieved through perfect reproduction of overtones, in particular of harmonic vibrations, it is necessary that the gap of the playback head be the same Assumes position to the magnetic tape as the gap of the recording head when recording the Sound vibrations on the magnetic tape.

The larger devices used for commercial purposes, for example in sound films, are used the column of the recording or playback heads exactly perpendicular to the direction of movement of the tape set. Since these devices are largely similar in their structure, the one is lifelike Reproduction of a recorded sound with a similar device is essentially guaranteed.

In the case of devices intended for private use, this is by no means the case, because the adjustment of the gap is different for the different device versions. There are also adjustment devices known for magnetic heads of any device. These usually have a complicated structure and several Adjustment organs, which makes them unsuitable for home appliances.

Therefore, for home magnetic tape recorders, a device is used to manually cut the head gap in one To adjust level, provided, which is characterized by an adjustment knob for the recording and Playback head which is arranged easily accessible on an outer surface of the device and a setting of the head by hand by the user of the device.

The recording or playback head of the device is arranged so that it is at least in small Limits can be moved back and forth by means of an externally accessible control element in order to thereby if necessary, the position of the recording or playback head in relation to the tape guide device especially for the purpose of being able to change the correct position of the magnetic gap to bring about this head.

In order to be able to adjust the magnetic head from the outside, the recording resp. Play head be arranged pivotable about a horizontal axis and the pivoting movement of the bar Head around this axis are caused with special control means.

For this purpose, for example, a spring can be used, which presses the side of the pivot axis on the head until it hits an adjustable stop on device
on home magnetic tape recorders

Applicant:
Gabriel Carpentier, Brussels

Representative: Dr.-Ing. W. Höger, Dr.-Ing. E. Maier

and Dipl.-Ing. M. Sc. W. Stellrecht, patent attorneys,

Stuttgart-O, Uhlandstr. 16

Claimed priority:
Belgium from November 25, 1953

Gabriel Carpentier, Brussels,
has been named as the inventor

lies. In this way, a very precise fine adjustment of the magnetic gap can be achieved.

Preferably, the pivot axis and the spring acting eccentrically on the head is below the Arranged head.

A preferred embodiment of the arrangement according to the invention is that the head on a pivoted plate is arranged, the inclination of which is adjustable in height Shoulder of a threaded axle is determined. The plate lies against this shoulder under the action of a spring. The height adjustment of this shoulder can be done by means of a Axis clamped rotary knob, which protrudes only a little over the cover plate of the housing.

In order to facilitate the adjustment of the head, the adjustment element for the adjustment of the head can be used be provided with a mark which, if permanently affixed to the device in accordance with another Brand is brought, which indicates the central or starting position of the head.

Further details of the arrangement according to the invention emerge from the drawing and FIG this referring description.

Fig. 1 shows a side view of part of the device partly in section;

Fig. 2 shows part of the device in plan view.

The recording and playback head 1 is pivotably arranged on an axis 2 so that its position in relation to that indicated by dashed lines 3

809 597/299

Claims (4)

Magnetic tape can be changed. In this way the gap of this head can always be vertical to the direction of movement of the magnetic tape can be adjusted, whereby a lifelike reproduction of the Tones recorded on the magnetic tape are guaranteed. Under the head 1, a compression spring 4 is provided, which tends to the head in the sense to swivel the clockwise around axis 2. A standing under the action of this compression spring, with the head rigidly connected plate 5 rests against the stop 6 of an axis 7, which at its lower End carries a thread and is screwed into the base plate 13 with this. It is easy to see that by rotating the axis 7, the plate 5 by means of the stop 6 on one side is raised. In the opposite sense, the plate 5 follows the descending stop 6 below the Action of the compression spring 4. In this way, the head 1 can be pivoted in one sense or the other will. As a rule, however, the amplitude of this pivoting movement must not assume any large values. Around To avoid this and to enable fine adjustment of the head, there is a rotary knob 9 on the axis 7 attached, which rises only a little above the surface of the cover plate 10. That way, this one can Button can practically only be operated with one finger, so that inadvertent adjustment of the Turning knob to avoid too large an angle. In order to facilitate the setting of the rotary knob 9, both the rotary knob itself and on the cover plate of the device each a brand 11 and 12 attached. In this way, even if in In a certain case an adjustment of the head 1 was necessary, the head easily back into its starting position be brought back by bringing the two marks 11 and 12 into alignment will. The arrangement according to the invention has the particular advantage that a control of the recording or Reproduction head is possible by means of organs attached to the surface of the device without the sensitive organs located inside the device must be touched. Pa τ ε ν τ α ν s i> η ccn E .- ίο 1. Setup on home magnetic tape recorders, to adjust the head gap by hand in one plane, characterized by a rotary knob (9) for the recording and playback head (1), which is easily accessible on an outer surface of the device is arranged and an adjustment of the head (1) by hand by the user of the device enables. 2. Device according to claim 1, characterized in that the head under the action a compression spring (4) causing a tilting movement of the head is standing and the tilting movement is carried out a stop (6) which can be adjusted by means of the rotary knob (9) is limited. 3. Device according to claims 1 and 2, characterized in that the adjustable stop (6) through a shoulder of a threaded knob bearing the rotary knob (9) Axis (7) is formed. 4. Device according to claims 1 to 3, characterized in that the rotary knob (9) with a mark (11) is provided, which in connection with a corresponding, attached to the device Mark (12) indicates the starting or normal position of the head. Considered publications:
German Patent No. 828 014;
Brochure Duoton sales Ges. Re. Opta magnetic tape heads. 1 sheet of drawings