GB539534A - Improvements in or relating to sound recording - Google Patents
Improvements in or relating to sound recordingInfo
- Publication number
- GB539534A GB539534A GB783840A GB783840A GB539534A GB 539534 A GB539534 A GB 539534A GB 783840 A GB783840 A GB 783840A GB 783840 A GB783840 A GB 783840A GB 539534 A GB539534 A GB 539534A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- sound
- turntable
- recording
- inch
- 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
Links
Classifications
-
- 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
- G11B3/60—Turntables for record carriers
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Abstract
539,534. Sound recording. THOMPSON, L. May 1, 1940, No. 7838. [Class 40 (ii)] Sound is recorded on a disc 24, Fig. 2, of thin aluminium or like semi-rigid material of about 0.006 inch to 0.015 inch in thickness by resting the disc on a hard surface on a turntable or on a disc over a turntable and subjecting the disc to a recording stylus 19, Fig. 4, which is lightly loaded for example to a pressure of about four ounces whereby warping of the disc is substantially avoided, a driving connection being provided between the disc and the turntable spindle for example by means of a square-shaped central hole 27 in the disc fitting over a correspondingly shaped end of the turntable spindle. The recording causes ridges 31 to be formed along the edges of the sound groove. A ring-shaped area 33 and rectangular areas 34, 35, 36 may be etched in the surface within the area of the record grooves to receive pencil markings. Pencil markings may also be made on the grooves themselves without interfering with sound reproduction therefrom. U.S.A. Specifications 2,133,596 and 2,213,936 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB783840A GB539534A (en) | 1940-05-01 | 1940-05-01 | Improvements in or relating to sound recording |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB783840A GB539534A (en) | 1940-05-01 | 1940-05-01 | Improvements in or relating to sound recording |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB539534A true GB539534A (en) | 1941-09-15 |
Family
ID=9840736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB783840A Expired GB539534A (en) | 1940-05-01 | 1940-05-01 | Improvements in or relating to sound recording |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB539534A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4739426A (en) * | 1985-10-23 | 1988-04-19 | Kabushiki Kaisha Toshiba | Disk drive system |
-
1940
- 1940-05-01 GB GB783840A patent/GB539534A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4739426A (en) * | 1985-10-23 | 1988-04-19 | Kabushiki Kaisha Toshiba | Disk drive system |
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