GB447880A - Improvements in and relating to sound recording apparatus - Google Patents

Improvements in and relating to sound recording apparatus

Info

Publication number
GB447880A
GB447880A GB3251435A GB3251435A GB447880A GB 447880 A GB447880 A GB 447880A GB 3251435 A GB3251435 A GB 3251435A GB 3251435 A GB3251435 A GB 3251435A GB 447880 A GB447880 A GB 447880A
Authority
GB
United Kingdom
Prior art keywords
recording
recording apparatus
markings
focusing
mask
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
GB3251435A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3251435A priority Critical patent/GB447880A/en
Publication of GB447880A publication Critical patent/GB447880A/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
    • 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

Landscapes

  • Recording Measured Values (AREA)

Abstract

447,880. Optical sound recording apparatus. KOLB, O. K., 39, Beverley Court, Wellesley Road, Chiswick, London. Nov. 23, 1935, No. 32514. Drawings to Specification. [Class 40 (ii)] The mask or diaphragm having a slit or like recording aperture in optical sound-recording apparatus is provided with outlines, lines, scale graduations, reference marks or other visible markings in order that the dimensions, focusing, position and/or extent of vibration of the recording image can be directly or indirectly observed through a window, optical eyepiece, &c. mounted in or on the casing of the recording apparatus. The observation window may be constructed of non-actinic transparent material and the focusing and dimensioning markings on the mask may be of one colour whilst the amplitude indicating markings may be of another colour. A known form of adjustable volume control device may be associated with the oscillograph or like recording instrument in order to enable an observer to control, adjust or limit the vibration amplitude of the recording light beam.
GB3251435A 1935-11-23 1935-11-23 Improvements in and relating to sound recording apparatus Expired GB447880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3251435A GB447880A (en) 1935-11-23 1935-11-23 Improvements in and relating to sound recording apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3251435A GB447880A (en) 1935-11-23 1935-11-23 Improvements in and relating to sound recording apparatus

Publications (1)

Publication Number Publication Date
GB447880A true GB447880A (en) 1936-05-27

Family

ID=10339761

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3251435A Expired GB447880A (en) 1935-11-23 1935-11-23 Improvements in and relating to sound recording apparatus

Country Status (1)

Country Link
GB (1) GB447880A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754329C (en) * 1937-12-03 1953-04-27 Rca Corp Control arrangement in devices for recording tones
DE882499C (en) * 1939-05-09 1953-07-09 Grammophon G M B H Deutsche Device for measuring the level of vinyl recordings

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754329C (en) * 1937-12-03 1953-04-27 Rca Corp Control arrangement in devices for recording tones
DE882499C (en) * 1939-05-09 1953-07-09 Grammophon G M B H Deutsche Device for measuring the level of vinyl recordings

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