[go: up one dir, main page]

CH290942A - Device for erasing recordings on magnetic sound carriers with a plurality of sound tracks lying directly next to one another. - Google Patents

Device for erasing recordings on magnetic sound carriers with a plurality of sound tracks lying directly next to one another.

Info

Publication number
CH290942A
CH290942A CH290942DA CH290942A CH 290942 A CH290942 A CH 290942A CH 290942D A CH290942D A CH 290942DA CH 290942 A CH290942 A CH 290942A
Authority
CH
Switzerland
Prior art keywords
sound
another
directly next
lying directly
carriers
Prior art date
Application number
Other languages
German (de)
Inventor
Treuunternehmen Promundo
Original Assignee
Treuunternehmen Promundo
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 Treuunternehmen Promundo filed Critical Treuunternehmen Promundo
Publication of CH290942A publication Critical patent/CH290942A/en

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
    • G11B5/024—Erasing
CH290942D 1950-10-16 1950-09-14 Device for erasing recordings on magnetic sound carriers with a plurality of sound tracks lying directly next to one another. CH290942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US190357A US2766328A (en) 1950-10-16 1950-10-16 Device for the erasure of recordings on magnetic sound carriers in the form of discsor endless tapes

Publications (1)

Publication Number Publication Date
CH290942A true CH290942A (en) 1953-05-31

Family

ID=22701004

Family Applications (1)

Application Number Title Priority Date Filing Date
CH290942D CH290942A (en) 1950-10-16 1950-09-14 Device for erasing recordings on magnetic sound carriers with a plurality of sound tracks lying directly next to one another.

Country Status (2)

Country Link
US (1) US2766328A (en)
CH (1) CH290942A (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975239A (en) * 1954-12-24 1961-03-14 Ibm Electromagnetic eraser
US2987582A (en) * 1955-08-12 1961-06-06 Sperry Rand Corp Multichannel magnetic erasing heads
DE1296199C2 (en) * 1957-02-13 1974-06-12 IBM Deutschland Internationale Büro-Maschinen GmbH, 7032 Sindelfingen CIRCUIT ARRANGEMENT FOR MAGNETIC RECORDING / SENSORING AND FOR DELETING DATA ON A MAGNETIC RECORDING CARRIER
US3060278A (en) * 1957-08-07 1962-10-23 Victor Comptometer Corp Dictating machine
US3023670A (en) * 1959-08-31 1962-03-06 Romero Cora Lora Automatic symbol reproducing device
GB1020522A (en) * 1963-10-15 1966-02-16 Amos Of Exeter Ltd Bulk-tape eraser
US3610838A (en) * 1968-03-11 1971-10-05 Sony Corp Erasing apparatus for magnetic memory discs using two dc heads
US3711750A (en) * 1969-07-02 1973-01-16 Huffman And Baker And Grosslig Dynamic anhysteretic demagnetization apparatus having pole faces perpendicular to the rotational axis
US3723668A (en) * 1970-03-27 1973-03-27 Ampex Method of erasing signals from magnetic discs using dc pulses which persist for one disc revolution
JPS517876Y1 (en) * 1970-08-31 1976-03-02
JPS513216B1 (en) * 1970-08-31 1976-02-02
US3801969A (en) * 1972-07-24 1974-04-02 Itel Corp Erase feature for data recording device
US4462055A (en) * 1982-01-04 1984-07-24 Ldj Electronics, Inc. Bulk tape erasing system
DE3337845A1 (en) * 1983-10-18 1985-04-25 Nixdorf Computer Ag, 4790 Paderborn HARD DISK DRIVE
US4970711A (en) * 1988-02-05 1990-11-13 Tandy Corporation Bulk eraser for optical memory media
US5721665A (en) * 1995-08-18 1998-02-24 Data Security, Inc. Modulated magnet field bulk degaussing system
US6731491B2 (en) 2001-06-15 2004-05-04 Data Security, Inc. Bulk degausser with fixed arrays of magnet poles
US7164569B1 (en) 2004-06-30 2007-01-16 Data Security, Inc. Mechanism for automated permanent magnet degaussing
US20060018075A1 (en) * 2004-07-23 2006-01-26 Data Security, Inc. Permanent magnet bulk degausser
US7701656B2 (en) * 2006-07-14 2010-04-20 Data Security, Inc. Method and apparatus for permanent magnet erasure of magnetic storage media
US7715166B2 (en) * 2006-07-14 2010-05-11 Data Security, Inc. Method and reciprocating apparatus for permanent magnet erasure of magnetic storage media
US7706102B1 (en) 2006-08-14 2010-04-27 Lockheed Martin Corporation Secure data storage
US20090284890A1 (en) * 2008-05-16 2009-11-19 Thiel Leroy D Mechanism and Method for Permanent Magnet Degaussing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US873084A (en) * 1907-05-02 1907-12-10 American Telegraphone Company Telegraphone.
US1166925A (en) * 1908-01-08 1916-01-04 Frank Somes Ober Apparatus for recording and reproducing sound.
US2188650A (en) * 1938-04-23 1940-01-30 Rca Corp Magnetic recording
US2531141A (en) * 1947-02-07 1950-11-21 Gen Electric Demagnetization of electromagnetic recording heads

Also Published As

Publication number Publication date
US2766328A (en) 1956-10-09

Similar Documents

Publication Publication Date Title
CH290942A (en) Device for erasing recordings on magnetic sound carriers with a plurality of sound tracks lying directly next to one another.
CH319415A (en) Device for checking information recorded on a recording medium
CH320548A (en) Device for recording electrical digit signals
NL176208B (en) MAGNETIC TAPE DEVICE WITH OPERATABLE PAUSE DEVICES.
CH341047A (en) Drill head
NL81692C (en) Circuitry for a signaling system with a transposition device common to a number of recording devices
SE138014C1 (en) Device for gramophones for inserting the tone arm needle to the correct initial position on a disc
AT178472B (en) Drive for magnetic sound devices
CH287606A (en) Magnetic head for a magnetic recorder.
AT181974B (en) Ring magnetic head for magnetic sound devices, in particular with tape-shaped sound carriers
FR1106676A (en) Magnetic modulator
CH333273A (en) Drill head
CH300656A (en) Device on magnetic sound recorders to find specific soundtrack locations on sound carriers.
CH290351A (en) Device for automatically reversing the direction of travel of magnetic recorders.
FR1088779A (en) Carriers
FR1074662A (en) Further training for carriers
NL179319B (en) MAGNETORESISTIVE READ HEAD.
AT199897B (en) Sound device for playing tape-shaped sound carriers
FR1085599A (en) Carriers
AT184382B (en) Drive device for tape-shaped phonograms
FR1052814A (en) Further training for carriers
FR1114340A (en) Breeder ordered by perforated labels
CH320396A (en) Record player
FR1089035A (en) Further training for carriers
AT182895B (en) Device for recording characters