NL78443C - - Google Patents

Info

Publication number
NL78443C
NL78443C NL78443DA NL78443C NL 78443 C NL78443 C NL 78443C NL 78443D A NL78443D A NL 78443DA NL 78443 C NL78443 C NL 78443C
Authority
NL
Netherlands
Application number
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.)
Publication of NL78443C publication Critical patent/NL78443C/xx

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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/265—Structure or manufacture of a head with more than one gap for erasing, recording or reproducing on the same track

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
NL78443D 1950-01-20 NL78443C (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US139759A US2594934A (en) 1950-01-20 1950-01-20 Erasing head for magnetic record members

Publications (1)

Publication Number Publication Date
NL78443C true NL78443C (fr)

Family

ID=22488158

Family Applications (1)

Application Number Title Priority Date Filing Date
NL78443D NL78443C (fr) 1950-01-20

Country Status (3)

Country Link
US (1) US2594934A (fr)
GB (1) GB678341A (fr)
NL (1) NL78443C (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068907B (de) * 1959-11-12 Aurigeno Ticino Giovanni Steinegger, (Schweiz) Löscheinrichtung für magnetisierbare Drähte
US2688053A (en) * 1950-11-09 1954-08-31 Ampro Corp Erasing magnet mounting and assembly
US2711445A (en) * 1951-03-27 1955-06-21 Steinegger Giovanni Sound recording and reproducing device
US2767254A (en) * 1951-09-28 1956-10-16 Rca Corp Magnetic recording
US2951127A (en) * 1955-02-24 1960-08-30 Kane Corp Du Magnetic recording and reproducing machine
US3024320A (en) * 1958-06-20 1962-03-06 James A Fraser Dictating machine erasure unit
US2997866A (en) * 1960-05-23 1961-08-29 Ashe Magnetic latch opener and demagnetizer
US3137003A (en) * 1960-12-05 1964-06-09 Litton Systems Inc Microwave process and apparatus
US3243784A (en) * 1960-09-29 1966-03-29 Litton Systems Inc Microwave process and apparatus
US3373250A (en) * 1964-04-06 1968-03-12 Clarence H. Adams Hand held multi-channel magnetic tape eraser
FR1543795A (fr) * 1966-12-30 Ibm Appareil de reproduction magnétique
US3610838A (en) * 1968-03-11 1971-10-05 Sony Corp Erasing apparatus for magnetic memory discs using two dc heads
US3665513A (en) * 1969-12-29 1972-05-23 Ibm Passive magnetic transfer of discrete magnetic information
US3699267A (en) * 1970-03-18 1972-10-17 Du Pont Apparatus for copying magnetic tapes
JPS549044B1 (fr) * 1970-05-21 1979-04-20
JPS531646B2 (fr) * 1973-10-02 1978-01-20
US3947891A (en) * 1973-10-02 1976-03-30 Sony Corporation Static magnetic erasing head
GB1575680A (en) * 1976-11-16 1980-09-24 Tokyo Shibaura Electric Co Tape recording apparatus including a multipolar erasing head and a manufacturing method for a multipolar erasing head
US4613919A (en) * 1981-12-15 1986-09-23 Matsushita Electric Industrial Co., Ltd. Magnetic erasing head

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US949351A (en) * 1907-08-08 1910-02-15 H M Cosh Electromagnetic ironing-board.
DE322252C (de) * 1914-01-03 1920-06-24 Ernest Wilson Verfahren zum Erhoehen der Empfindlichkeit besonders von solchen magnetischen Instrumenten und Apparaten, deren Wirkung von der Permeabilitaet von weichem Eisen oder aehnlichem magnetischen Material abhaengt
US1863308A (en) * 1928-06-12 1932-06-14 Bell Telephone Labor Inc Receiver

Also Published As

Publication number Publication date
US2594934A (en) 1952-04-29
GB678341A (en) 1952-09-03

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