GB304848A - Improvements in or relating to sound recording - Google Patents

Improvements in or relating to sound recording

Info

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
Application number
GB29045/27A
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.)
Parlophone Records Ltd
Original Assignee
Gramophone Co Ltd
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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Priority to GB29045/27A priority Critical patent/GB304848A/en
Priority to US315049A priority patent/US1951198A/en
Publication of GB304848A publication Critical patent/GB304848A/en
Expired legal-status Critical Current

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.
GB29045/27A 1927-10-31 1927-10-31 Improvements in or relating to sound recording Expired GB304848A (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
US1951198A (en) 1934-03-13

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