GB914247A - Improvements in or relating to magnetic transducing apparatus - Google Patents

Improvements in or relating to magnetic transducing apparatus

Info

Publication number
GB914247A
GB914247A GB232860A GB232860A GB914247A GB 914247 A GB914247 A GB 914247A GB 232860 A GB232860 A GB 232860A GB 232860 A GB232860 A GB 232860A GB 914247 A GB914247 A GB 914247A
Authority
GB
United Kingdom
Prior art keywords
jan
photo
control means
relating
record
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
GB232860A
Inventor
Charles Stanfield Rutherf Dain
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB232860A priority Critical patent/GB914247A/en
Publication of GB914247A publication Critical patent/GB914247A/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
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/04—Preventing, inhibiting, or warning against accidental erasing or double recording

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

914,247. Preventing accidental recording. ELECTRIC & MUSICAL INDUSTRIES Ltd. Jan. 18, 1961 [Jan. 22, 1960], No. 2328/60. Drawings to Specification. Class 40 (2). A magnetic record, or a magnetic tape spool may carry a detachable member, whose presence or absence is photo-electrically sensed to control means permitting or inhibiting recording. A logical circuit (the Fig. not shown), includes a bi-stable circuit arranged to prevent the initial instruction given by the control means from being countermanded if there is a subsequent variation in the photo-electric output while the record is running.
GB232860A 1960-01-22 1960-01-22 Improvements in or relating to magnetic transducing apparatus Expired GB914247A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB232860A GB914247A (en) 1960-01-22 1960-01-22 Improvements in or relating to magnetic transducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB232860A GB914247A (en) 1960-01-22 1960-01-22 Improvements in or relating to magnetic transducing apparatus

Publications (1)

Publication Number Publication Date
GB914247A true GB914247A (en) 1962-12-28

Family

ID=9737607

Family Applications (1)

Application Number Title Priority Date Filing Date
GB232860A Expired GB914247A (en) 1960-01-22 1960-01-22 Improvements in or relating to magnetic transducing apparatus

Country Status (1)

Country Link
GB (1) GB914247A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445199A (en) * 1980-07-15 1984-04-24 Fujitsu Fanuc Limited Portable bubble memory apparatus
US4459679A (en) * 1979-10-04 1984-07-10 Fujitsu Limited Magnetic bubble memory device cassette

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4459679A (en) * 1979-10-04 1984-07-10 Fujitsu Limited Magnetic bubble memory device cassette
US4445199A (en) * 1980-07-15 1984-04-24 Fujitsu Fanuc Limited Portable bubble memory apparatus

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