GB662462A - Improvements in and relating to magnetic sound recording and reproducing apparatus - Google Patents

Improvements in and relating to magnetic sound recording and reproducing apparatus

Info

Publication number
GB662462A
GB662462A GB550749A GB550749A GB662462A GB 662462 A GB662462 A GB 662462A GB 550749 A GB550749 A GB 550749A GB 550749 A GB550749 A GB 550749A GB 662462 A GB662462 A GB 662462A
Authority
GB
United Kingdom
Prior art keywords
reproducing apparatus
magnetic
relating
strip
film
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
GB550749A
Inventor
Otto Kurt Kolb
Eric Owen Smith
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.)
BRITISH ACOUSTIC FILMS Ltd
Original Assignee
BRITISH ACOUSTIC FILMS 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 BRITISH ACOUSTIC FILMS Ltd filed Critical BRITISH ACOUSTIC FILMS Ltd
Priority to GB550749A priority Critical patent/GB662462A/en
Publication of GB662462A publication Critical patent/GB662462A/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
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/10—Structure or manufacture of housings or shields for heads
    • G11B5/11—Shielding of head against electric or magnetic fields
    • G11B5/115—Shielding devices arranged between heads or windings
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/488—Disposition of heads

Abstract

662,462. Magnetic recording and reproducing apparatus. BRITISH ACOUSTIC FILMS. Ltd. March 1, 1949. No. 5507/49. Class 40 (ii), The drum 7 of a magnetic recording and reproducing apparatus having heads 6, 8 pressing on a film 1 is made of non-magnetic, preferably insulating, material (e.g. artificial resin) and has stationary screening shields 21, 22 of magnetically soft material extending into its interior. The strip,' consisting of a film 1 coated with magnetic material 2, is drawn by a power-driven sprocket 4 over drum 7 which is mounted on the same shaft as a flywheel 13 in order to maintain velocity stability. The recording head 6 and reproducing head 8 mounted within screening cans 14, 15 are pressed onto the strip by leaf springs 16, 17.
GB550749A 1949-03-01 1949-03-01 Improvements in and relating to magnetic sound recording and reproducing apparatus Expired GB662462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB550749A GB662462A (en) 1949-03-01 1949-03-01 Improvements in and relating to magnetic sound recording and reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB550749A GB662462A (en) 1949-03-01 1949-03-01 Improvements in and relating to magnetic sound recording and reproducing apparatus

Publications (1)

Publication Number Publication Date
GB662462A true GB662462A (en) 1951-12-05

Family

ID=9797518

Family Applications (1)

Application Number Title Priority Date Filing Date
GB550749A Expired GB662462A (en) 1949-03-01 1949-03-01 Improvements in and relating to magnetic sound recording and reproducing apparatus

Country Status (1)

Country Link
GB (1) GB662462A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787637A (en) * 1971-07-26 1974-01-22 Audichron Co Announcing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3787637A (en) * 1971-07-26 1974-01-22 Audichron Co Announcing system

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