GB304848A - Improvements in or relating to sound recording - Google Patents
Improvements in or relating to sound recordingInfo
- Publication number
- GB304848A GB304848A GB29045/27A GB2904527A GB304848A GB 304848 A GB304848 A GB 304848A GB 29045/27 A GB29045/27 A GB 29045/27A GB 2904527 A GB2904527 A GB 2904527A GB 304848 A GB304848 A GB 304848A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trace
- record
- blank
- support
- bulge
- 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
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/16—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by mechanical cutting, deforming or pressing
- G11B11/18—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by mechanical cutting, deforming or pressing with reproducing by optical means
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording 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
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
304,848. Mittell, B. E. G., Whitaker, A., and Gramophone Co., Ltd. Oct. 31, 1927. Optical records and apparatus.-Sound is recorded on transparent material such as celluloid by impressing by a smooth pointed stylus without removing any material, and such record is reproduced or duplicated by optical-electric means. If the blank is supported on a rigid support, an upstanding ridge is formed on each side of the sound groove, but if supported on a yielding support, the stylus depresses the blank below the trace into the support to form a bulge. Figs. 3 and 8 show means for reproducing a record 4 formed by depressing the trace into the support so as to form a bulge 6 on the back of the blank. The face of the blank is flooded with celluloid solution to fil up the trace, and the record if of disc form is rotated and traversed so that a parallel beam of light is 'directed through the bufge 6 and is focussed thereby on to, and transversely of, a slit 7 in a plate 8. The focussed beam which moves lengthwise of the slit 7 in accordance with the formation of the bulge 6 passes through a neutral tinted wedge 9, preferablv associated with a plain wedge 11 and falls with varying effect due. to the wedge, 9 on a photoelectric cell 10 which operates a sound emitter or an electromagnetic recorder for making a record. In reproducing a record with upstanding ridges on each side of the trace us produced by recording on a blank on a rigid support, the beam which is spread by the concave form of the trace is directed through a lens to focus it on the slit, and polarizers may be arranged in the path of the beam in front of and behind the slotted plate. Black lines may be produced on the record on each side of the trace by applying ink: this will not Bow into the polished indented trace, and a groove may be depressed between successive traces to limit the flow of the black lines in the other direction. A matt surface record facilitates the application of the black lines.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB29045/27A GB304848A (en) | 1927-10-31 | 1927-10-31 | Improvements in or relating to sound recording |
US315049A US1951198A (en) | 1927-10-31 | 1928-10-25 | Sound recording |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB29045/27A GB304848A (en) | 1927-10-31 | 1927-10-31 | Improvements in or relating to sound recording |
Publications (1)
Publication Number | Publication Date |
---|---|
GB304848A true GB304848A (en) | 1929-01-31 |
Family
ID=10285321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29045/27A Expired GB304848A (en) | 1927-10-31 | 1927-10-31 | Improvements in or relating to sound recording |
Country Status (2)
Country | Link |
---|---|
US (1) | US1951198A (en) |
GB (1) | GB304848A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3430966A (en) * | 1967-04-03 | 1969-03-04 | Gauss Electrophysics Inc | Transparent recording disc |
DE1903822C3 (en) * | 1969-01-23 | 1973-12-13 | Ted Bildplatten Ag Aeg-Telefunkenteldec, Zug (Schweiz) | Device for reproducing signals stored on a carrier, recording method for a carrier and carrier for reproducing with the device |
FR2069448A5 (en) * | 1969-11-15 | 1971-09-03 | Licentia Gmbh | |
FR2271617B1 (en) * | 1974-05-15 | 1976-10-15 | Thomson Brandt | |
US4839882A (en) * | 1977-11-21 | 1989-06-13 | U. S. Philips Corporation | Record carrier with an optically readable trackwise-arranged information structure |
-
1927
- 1927-10-31 GB GB29045/27A patent/GB304848A/en not_active Expired
-
1928
- 1928-10-25 US US315049A patent/US1951198A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1951198A (en) | 1934-03-13 |
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