US2137307A - Sound record for talking machines - Google Patents

Sound record for talking machines Download PDF

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Publication number
US2137307A
US2137307A US713834A US71383434A US2137307A US 2137307 A US2137307 A US 2137307A US 713834 A US713834 A US 713834A US 71383434 A US71383434 A US 71383434A US 2137307 A US2137307 A US 2137307A
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Prior art keywords
sound
sound record
talking machines
cadmium
metal
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Expired - Lifetime
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US713834A
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Rabald Willy
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/68—Record carriers
    • G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S29/00—Metal working
    • Y10S29/028—Magnetic recording digest

Definitions

  • This invention relates to a special construction of sound records to be employed on one side or on both sides for recording and reproducing sound of all kinds, and the'novelty of which consists in that as sound wave carrier cadmium metal is employed which is applied in a layer of suitable thickness on a flexible plate serving as carrier for the cadmium layer and made of metal or other substances suitable therefor.
  • the accompanying drawing shows in elevation, a sound record. Referring more in detail to the accompanying drawing, there is illustrated a layer I of suitable'thickness of cadmium metal that is applied to a flexible plate 2 made of metal or other material suitable to act asa carrier for the cadmium metal.
  • Cadmium is extremely resistant against atmos- 10 pheric influences, and possesses a hardness which is sufiicient for sound records to play them as often as desired. with a suitable needle of horn or wood.
  • a sound record for use in recording and reproducing sound, which presents a material comprising cadmium as a sound I'BOOIdil .greproducing medium.
  • a sound record for use in recording and 20 reproducing sound, which presents cadmium as sound recording-reproducing medium.

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  • Piezo-Electric Transducers For Audible Bands (AREA)

Description

New. 22, W. RAB LD 2,137,307
SOUND RECORD FOR TALKING MACHINES Filed March 3, 1934 Patented Nov. 22, 1938 UNl'lED STATES SOUND RECORD FOR. TALKING MACHINES Willy Rabald, Leipzig, Germany Application March 3, 1934, Serial No. 713,834 I In Germany March 3, 1933 2 Claims.
This invention relates to a special construction of sound records to be employed on one side or on both sides for recording and reproducing sound of all kinds, and the'novelty of which consists in that as sound wave carrier cadmium metal is employed which is applied in a layer of suitable thickness on a flexible plate serving as carrier for the cadmium layer and made of metal or other substances suitable therefor.
10 The accompanying drawing shows in elevation, a sound record. Referring more in detail to the accompanying drawing, there is illustrated a layer I of suitable'thickness of cadmium metal that is applied to a flexible plate 2 made of metal or other material suitable to act asa carrier for the cadmium metal.
A greatadvantage of cadmium consists in its a good cutting capability, which, as experiments have shown, is possible with no other metal whilst 20 obtaining the same advantages.
As compared with the pressing of record grooves in the metal the cutting thereof enables a higher tone frequency because the pressing requires a much higher recording pressure.
The'crystalline properties of cadmiumand the mirror-smooth tone grooves produced thereby reduce the recording noises to a minimum as compared with pressed plates. In known records made of metal or other material and serving for 5 direct recording and reproduction, a' preliminary or subsequent treatment is mostly necessary which is eliminated in case of the record according to the invention.
Cadmium is extremely resistant against atmos- 10 pheric influences, and possesses a hardness which is sufiicient for sound records to play them as often as desired. with a suitable needle of horn or wood.
1. A sound record, for use in recording and reproducing sound, which presents a material comprising cadmium as a sound I'BOOIdil .greproducing medium.
2. A sound record, for use in recording and 20 reproducing sound, which presents cadmium as sound recording-reproducing medium.
WILLY RABALD.
US713834A 1933-03-03 1934-03-03 Sound record for talking machines Expired - Lifetime US2137307A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2137307X 1933-03-03

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US2137307A true US2137307A (en) 1938-11-22

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563119A (en) * 1948-03-03 1951-08-07 Otis Pressure Control Inc Recorder chart for oil or gas well recording instruments
US4248438A (en) * 1978-03-18 1981-02-03 Teldec-Telefunken-Decca Schallplatten Gmbh Mechanical record cutting method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563119A (en) * 1948-03-03 1951-08-07 Otis Pressure Control Inc Recorder chart for oil or gas well recording instruments
US4248438A (en) * 1978-03-18 1981-02-03 Teldec-Telefunken-Decca Schallplatten Gmbh Mechanical record cutting method

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