EP0010094A1 - Reproduction sonore amelioree des disques de tourne-disques - Google Patents

Reproduction sonore amelioree des disques de tourne-disques

Info

Publication number
EP0010094A1
EP0010094A1 EP79900136A EP79900136A EP0010094A1 EP 0010094 A1 EP0010094 A1 EP 0010094A1 EP 79900136 A EP79900136 A EP 79900136A EP 79900136 A EP79900136 A EP 79900136A EP 0010094 A1 EP0010094 A1 EP 0010094A1
Authority
EP
European Patent Office
Prior art keywords
record
negatively charged
charged ions
ions
emitters
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.)
Withdrawn
Application number
EP79900136A
Other languages
German (de)
English (en)
Inventor
Donald Maynard Chave
David James Powell
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.)
MILTY PRODUCTS Ltd
Original Assignee
MILTY PRODUCTS 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 MILTY PRODUCTS Ltd filed Critical MILTY PRODUCTS Ltd
Publication of EP0010094A1 publication Critical patent/EP0010094A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/58—Cleaning record carriers or styli, e.g. removing shavings or dust or electrostatic charges
    • G11B3/5809—Cleaning record carriers or styli, e.g. removing shavings or dust or electrostatic charges during transducing operation
    • G11B3/5818—Cleaning record carriers or styli, e.g. removing shavings or dust or electrostatic charges during transducing operation for record carriers
    • G11B3/5854—Cleaning record carriers or styli, e.g. removing shavings or dust or electrostatic charges during transducing operation for record carriers using means not contacting the record carrier
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • H05F3/04—Carrying-off electrostatic charges by means of spark gaps or other discharge devices

Definitions

  • the invention concerns the alleviation of the adverse effects of electrostatic charges present on gramophone 5. records.
  • th ' e positively 15. charged and negatively charged ions are emitted by respective emission means, and are emitted continuously ' and simultaneously by such means.
  • the invention also includes apparatus for practising the method as aforesaid and which comprises emission means 20. adapted to create positively charged and negatively charged ions.
  • Fig. 1 is a diagrammatic side elevation of a device constructed in accordance with the invention as positioned for use relative to a record disc on a gramophone turntable;
  • Fig. 2 is a perspective view of the device shown in
  • Fig. 1; and Fig. 3 is a diagrammatic perspective view of the 5. pins of the device of Figs. 1 and 2.
  • a device for the neutralisation or substantial neutralisation of the electrostatic field arising from an electrostatic charge 10. at the surface of a record disc 11 on a gramophone turn ⁇ table 12 comprises spaced electrodes 13, 14 arranged in side-by-side disposition within a box 15 mounted adjacen the said turntable, the electrodes 13, 14 being connecte with respective high voltage sources via leads 16, 17. 15.
  • the electrodes 13, 14 each comprise a pin of 38*s gauge wire, such pins being approximately two and a half centimetres long and being mounted in parallel dispositi at one and a half centimetres centres in a perspex block to extend forwardly therefrom by approximately three- 20. quarters of their length.
  • the rearward ends of the pins are connected with the respective leads 16, 17 directl adjacent the back of the block.
  • the box 15, which box is conveniently fabricated from synthetic plastics material, for example ABS, is of 25. rectangular form, and has a window at its forward end, the pins being arranged perpendicular to the plane of the window and the perspex block being secured to the box with the forward ends of the pins positioned rear- wardly of the window respectively to emit positive and 30. negative ions therethrough.
  • such box is mounted on a base plate 18 by means of an articulated linkage 19, such linkage being so connected 35. with the base plate 18 or box 15 as to provide for a relative rotation between the box and base plate if desired.
  • the device may be free-standing relative to the turntable 12 or may be secured in position relative thereto, the base plate in the former case, preferably 5. being weighted for stability purposes.
  • the device is positioned adjacent the periphery of the record disc 11, say two and a half centimetres from the line of such periphery, with the common plane of the electrodes 13, 14 approximately
  • the electrodes 13, 14 are connected with a positive source of 4.43 KV and a negative source of 3.55 KV respectively.
  • the electrode emitting the positive ions is preferably placed forwardly of that electrode
  • the pins be positioned to define a plane parallel to the plane of the record disc and slightly above such plane.
  • the device as hereinbefore described represents a convenient, effective and aesthetically 5. pleasing structure for reducing contamination of the playing surface of the revolving disc by dust, for minimising variations in the weight trackability of the pick-up arm and stylus and for alleviating other problems arising from any electrostatic charge at the record
  • arrangement there may be a row of from two to twelve pins arranged at say, two and a half centimetres centres for the emission of positive ions and a further similar row of pins for the emission of negative ions, the two rows being arranged in parallel disposition and lying in
  • each emitter takes the form of a rod or wire arranged tangentially of the disc or
  • wire lengths of between two and a half and thirty centimetres having given satisfactory results.

Landscapes

  • Elimination Of Static Electricity (AREA)

Abstract

Methode et moyens d'attenuation des effets adverses produits par les charges electrostatiques et le champ electrostatique qui se cree sur un disque de tourne-disques pendant qu'il passe, comprenant l'emission simultanee d'ions positifs et d'ions ne tifs dans l'espace situe au-dessus du disque au moyen d'electrodes d'emission (13, 14) respectives disposees a cote de la peripherie du disque, les voltages appliques aux electrodes d'emission respectives etant differents et l'electrode positive etant, de preference, placee avant l'electrode negative dans le sens de rotation du disque de facon que tout point de la peripherie du disque rencontre d'abord l'electrode positive.
EP79900136A 1978-02-08 1979-08-28 Reproduction sonore amelioree des disques de tourne-disques Withdrawn EP0010094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB508978 1978-02-08
GB5089/78A GB1596577A (en) 1978-02-08 1978-02-08 Enhanced sound reproduction from gramophone records

Publications (1)

Publication Number Publication Date
EP0010094A1 true EP0010094A1 (fr) 1980-04-30

Family

ID=9789569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79900136A Withdrawn EP0010094A1 (fr) 1978-02-08 1979-08-28 Reproduction sonore amelioree des disques de tourne-disques

Country Status (8)

Country Link
EP (1) EP0010094A1 (fr)
JP (1) JPS55500342A (fr)
BE (1) BE873988A (fr)
DK (1) DK420179A (fr)
GB (1) GB1596577A (fr)
IT (1) IT1110419B (fr)
NL (1) NL7900896A (fr)
WO (1) WO1979000603A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4556795A (en) * 1982-11-19 1985-12-03 Ensign-Bickford Industries, Inc. Corona discharge device
ATE118956T1 (de) * 1990-12-26 1995-03-15 Eastman Kodak Co System und verfahren zum elektrostatischen entladen eines bandes.
DE102006020035A1 (de) 2006-04-26 2007-10-31 B. Braun Melsungen Ag Herstellung und Verwendung von Poly(hydroxyethylstärke)chitin- und Poly(Carboxymethylstärke)chitin-Verbindungen
TWI393484B (zh) * 2007-11-02 2013-04-11 Hon Hai Prec Ind Co Ltd 靜電消除裝置及塑膠產品表面消除靜電之方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE174292C (fr) * 1905-05-15
US2582939A (en) * 1947-04-15 1952-01-15 Dictaphone Corp Record chip removal apparatus
FR1229405A (fr) * 1959-07-07 1960-09-07 Neutralisation des charges électro-statiques par application de champs coercitifs
AU412176B2 (en) * 1967-05-15 1971-04-06 The Commonwealth Of Australia Charging xerographic images
US3730753A (en) * 1971-07-30 1973-05-01 Eastman Kodak Co Method for treating a web
US3942072A (en) * 1974-10-18 1976-03-02 Burlington Industries, Inc. Method and system for maintaining an electrically neutral atmosphere
US3968405A (en) * 1975-04-14 1976-07-06 Testone Anthony Quintin Static electricity suppressor with patterned coating and method of making
DE2632265C2 (de) * 1976-07-17 1978-07-20 Ruthard 5630 Remscheid Marowsky Einrichtung an einem Plattenspieler mit einer Quelle ionisierender Strahlung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO7900603A1 *

Also Published As

Publication number Publication date
WO1979000603A1 (fr) 1979-08-23
IT7920023A0 (it) 1979-02-08
JPS55500342A (fr) 1980-06-19
IT1110419B (it) 1985-12-23
NL7900896A (nl) 1979-08-10
GB1596577A (en) 1981-08-26
DK420179A (da) 1979-10-05
BE873988A (fr) 1979-05-29

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): FR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn
RIN1 Information on inventor provided before grant (corrected)

Inventor name: CHAVE, DONALD, MAYNARD

Inventor name: POWELL, DAVID, JAMES