GB775050A - Improvements in or relating to methods of recording signals - Google Patents

Improvements in or relating to methods of recording signals

Info

Publication number
GB775050A
GB775050A GB9765/55A GB976555A GB775050A GB 775050 A GB775050 A GB 775050A GB 9765/55 A GB9765/55 A GB 9765/55A GB 976555 A GB976555 A GB 976555A GB 775050 A GB775050 A GB 775050A
Authority
GB
United Kingdom
Prior art keywords
record
layer
relating
methods
april
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
GB9765/55A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB775050A publication Critical patent/GB775050A/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
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/03—Biasing

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

775,050. Magnetic recording apparatus. PHILIPS ELECTRICAL INDUSTRIES, Ltd. April 4, 1955 [April 5, 1954], No. 9765/55. Class 40 (2). A method of manufacturing magnetic records, comprises recording firstly the low frequencies in conjunction with a high-frequency bias current, and superimposing on said record the high frequencies in conjunction with a bias current smaller than that used for the low frequencies. The method is carried out by means of a magnetic head, Fig. 2, having a core with two gaps, the low-frequency signals being applied at one gap by means of a coil 6 to produce a record layer 3, and the high-frequency signals being applied at the other gap by means of a coil 7 to produce a record in the layer 3 and layer 2.
GB9765/55A 1954-04-05 1955-04-04 Improvements in or relating to methods of recording signals Expired GB775050A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL775050X 1954-04-05

Publications (1)

Publication Number Publication Date
GB775050A true GB775050A (en) 1957-05-15

Family

ID=19829960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9765/55A Expired GB775050A (en) 1954-04-05 1955-04-04 Improvements in or relating to methods of recording signals

Country Status (1)

Country Link
GB (1) GB775050A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1116421B (en) * 1960-03-10 1961-11-02 Wolfgang Bogen Arrangement for magnetic recording of frequency mixtures divided into frequency ranges
US3070670A (en) * 1960-02-23 1962-12-25 Ampex Magnetic record head assembly
NL1015834C2 (en) * 2000-07-28 2002-01-29 Onstream B V Method for writing information at different depths in a magnetic tape.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3070670A (en) * 1960-02-23 1962-12-25 Ampex Magnetic record head assembly
DE1116421B (en) * 1960-03-10 1961-11-02 Wolfgang Bogen Arrangement for magnetic recording of frequency mixtures divided into frequency ranges
NL1015834C2 (en) * 2000-07-28 2002-01-29 Onstream B V Method for writing information at different depths in a magnetic tape.
WO2002011129A1 (en) * 2000-07-28 2002-02-07 Onstream Holding B.V. Method for writing information into a magnetic tape at different depth

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