DE908417C - Recording of basic noise-free sound recordings in A. push-pull sprout script - Google Patents

Recording of basic noise-free sound recordings in A. push-pull sprout script

Info

Publication number
DE908417C
DE908417C DEK5100D DEK0005100D DE908417C DE 908417 C DE908417 C DE 908417C DE K5100 D DEK5100 D DE K5100D DE K0005100 D DEK0005100 D DE K0005100D DE 908417 C DE908417 C DE 908417C
Authority
DE
Germany
Prior art keywords
push
pull
recording
sprout
script
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEK5100D
Other languages
German (de)
Inventor
Dipl-Ing Karl Schwarz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Klangfilm GmbH
Original Assignee
Klangfilm GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Klangfilm GmbH filed Critical Klangfilm GmbH
Priority to DEK5100D priority Critical patent/DE908417C/en
Application granted granted Critical
Publication of DE908417C publication Critical patent/DE908417C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor

Description

Das Patent Sod. 599 schützt eine Anordnung zur Aufnahme von Tonaufzeichnungen in A-Gegentakt-Schrift, die dadurch hergestellt werden, daß zwei gemäß der Umhüllenden der Tonströme gesteuerte Blenden gleichphasig und in gleicher Richtung über den Aufnahmespalt bewegt werden. Hierbei können die beiden Blenden aus einem einzigen Stück bestehen.The patent Sod. 599 protects an arrangement for recording sound recordings in A push-pull, which are produced by two according to the envelope the sound streams controlled diaphragms in phase and in the same direction across the Receiving gap are moved. Here, the two panels can be made from a single one Piece.

Gemäß der Erfindung wird vorgeschlagen, zur Erzielung einer grundgeräuschfreien A-Gegentakt-Sprossenschrift die gemäß der Umhüllenden gesteuerten Blenden als Graukeile auszubilden. Dabei können natürlich auch die Graukeile zu einem einzigen Graukeil zusammengefaßt werden. Ein derartiges Ausführungsbeispiel der Erfindung ist in der Abbildung dargestellt.According to the invention it is proposed to achieve a noise-free A push-pull bar font the diaphragms controlled according to the envelope as gray wedges to train. Of course, the gray wedges can also become a single gray wedge be summarized. One such embodiment of the invention is shown in FIG Figure shown.

Zur Erzielung einer A-Gegentakt-Sprossenschrift werden die Graukeile i und a gegenüber dem Aufnahmespalt 3 von den Tonströmen bewegt; hierbei liegen diese Graukeile in bezug auf ihre Lichtdurchlässigkeit umgekehrt zueinander. Ein weiterer Graukeil .1, der sich ebenfalls im Strahlengang des Aufzeichnungslichtes befindet, aber in der Darstellung der L'bersicht halber versetzt gezeichnet ist, wird gemäß der Umhüllenden der Tonströme bewegt, derart, daß an den Stellen kleiner Amplituden im Vorführfilm eine größere mittlere Schwärzung erzielt wird als an den Stellen großer Amplituden. Dieser Graukeil dient also dazu, den bekannten Reintoneffekt zu erzielen.The gray wedges are used to achieve an A push-pull bar font i and a moved opposite the receiving gap 3 by the sound streams; lie here these gray wedges are inversely to one another with regard to their light transmission. A Another gray wedge .1, which is also in the beam path of the recording light is located, but is drawn offset in the illustration for the sake of clarity, is moved according to the envelope of the sound currents, in such a way that smaller at the points Amplitudes in the projection film a greater mean density is achieved than in the Make large amplitudes. This gray wedge is used to create the well-known pure tone effect to achieve.

An Stelle eines Graukeils können natürlich auch zwei Graukeile verwendet werden, die dann gemäß der Erfindung gleichphasig und in gleicher Richtung über den Aufnahmespalt bewegt werden.Instead of one gray wedge, two gray wedges can of course also be used are then in phase and in the same direction over according to the invention the receiving gap can be moved.

An Stelle der Graukeile selbst können natürlich auch Halbschattengebiete zur Erzeugung der gewünschten Aufzeichnung Anwendung finden. Für die Frequenzaufzeichnung können die Graukeile getrennt oder aber auch aus einem Stück hergestellt sein.Instead of the gray wedges themselves, penumbra areas can of course also be used to create the desired recording application. For frequency recording the gray wedges can be made separately or in one piece.

Claims (2)

PATENTANSPRÜCHE: i. Anordnung zur Aufnahme von -rundgeräuschfreien Tonaufzeichnungen in A-Gegentakt-Sprossenschrift, bei der gemäß Patent 9o4 599 zwei gemäß der Umhüllenden gesteuerte Blenden gleichphasig und in gleicher Richtung über den Aufnahmespalt bewegt werden, dadurch gekennzeichnet, daß als Blenden Graukeile verwendet werden. PATENT CLAIMS: i. Arrangement for the inclusion of ambient noise-free Sound recordings in A-push-pull rung writing, in which according to patent 9o4 599 two according to the envelope controlled diaphragms in phase and in the same direction over the receiving gap are moved, characterized in that gray wedges are used as diaphragms be used. 2. Anordnung nach Anspruch i, dadurch gekennzeichnet, daß die beiden Blenden aus einem einzigen Stück bestehen.2. Arrangement according to claim i, characterized in that the both panels consist of a single piece.
DEK5100D 1939-02-02 1939-02-02 Recording of basic noise-free sound recordings in A. push-pull sprout script Expired DE908417C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK5100D DE908417C (en) 1939-02-02 1939-02-02 Recording of basic noise-free sound recordings in A. push-pull sprout script

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK5100D DE908417C (en) 1939-02-02 1939-02-02 Recording of basic noise-free sound recordings in A. push-pull sprout script

Publications (1)

Publication Number Publication Date
DE908417C true DE908417C (en) 1954-04-05

Family

ID=7210684

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK5100D Expired DE908417C (en) 1939-02-02 1939-02-02 Recording of basic noise-free sound recordings in A. push-pull sprout script

Country Status (1)

Country Link
DE (1) DE908417C (en)

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