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公开(公告)号：AU523195B2
公开(公告)日：1982-07-15
申请号：AU4559079
申请日：1979-03-29
Applicant: SONY CORP
Inventor： OMURA YOSHIMOTO
Abstract: A record player includes an electro-magnetic member for applying to its tone arm an outside force which is varied to effectively cancel the inside force generated when the stylus located on the tone arm rides upon a rotating record disc. The record player further includes a detecting device for detecting the rotational position of the tone arm, and a computer which, as a function of the rotational position of the tone arm determined from a detecting signal supplied by the detecting device, generates an outside force control voltage which is sufficient, when supplied to the electro-magnetic member, to cancel the inside force. An additional electro-magnetic member may be used to apply a stylus pressure to the tone arm in response to a stylus pressure control voltage. The outside force control voltage may also be varied as a function of such a stylus pressure control voltage.
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公开(公告)号：AU3789078A
公开(公告)日：1980-01-17
申请号：AU3789078
申请日：1978-07-10
Applicant: SONY CORP
Inventor： OMURA YOSHIMOTO , HARA HIDEO , KAWASHIMA ISAO , SEKIGUCHI KEISUKE , SHINO KUNINORI
Abstract: A tone arm assembly for record players has first and second electro-magnetic motors operable for swinging a tone arm in vertical and horizontal directions, respectively, in respect to a record disc on a turntable, and a control circuit for controlling the first and second motors in such a manner that the tone arm is moved from a raised inoperative position to a lowered playing position, or from the lowered playing position to the raised inoperative position in response to control signals.
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公开(公告)号：AU4559079A
公开(公告)日：1979-10-18
申请号：AU4559079
申请日：1979-03-29
Applicant: SONY CORP
Inventor： OMURA YOSHIMOTO
Abstract: A record player includes an electro-magnetic member for applying to its tone arm an outside force which is varied to effectively cancel the inside force generated when the stylus located on the tone arm rides upon a rotating record disc. The record player further includes a detecting device for detecting the rotational position of the tone arm, and a computer which, as a function of the rotational position of the tone arm determined from a detecting signal supplied by the detecting device, generates an outside force control voltage which is sufficient, when supplied to the electro-magnetic member, to cancel the inside force. An additional electro-magnetic member may be used to apply a stylus pressure to the tone arm in response to a stylus pressure control voltage. The outside force control voltage may also be varied as a function of such a stylus pressure control voltage.
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公开(公告)号：DE2718984A1
公开(公告)日：1977-11-17
申请号：DE2718984
申请日：1977-04-28
Applicant: SONY CORP
Inventor： NAKAJIMA HEITARO , OMURA YOSHIMOTO , KAWASHIMA ISAO
IPC: C08L23/00 , B05D3/10 , B05D7/14 , B29C55/00 , B29C65/00 , B29C65/70 , B32B15/08 , B32B15/085 , C08J5/12 , C08L7/00 , C08L21/00 , C08L23/26 , C08L51/00 , C08L51/02 , C08L101/00 , C09J5/02 , C23C22/00 , C23C22/07 , G11B3/10 , G11B3/12 , G11B3/16 , G11B3/30 , G11B3/32 , G11B3/36 , G11B3/38
Abstract: A tone arm assembly for record players having a first motor for rotating a tone arm in the vertical direction, a second motor for rotating the tone arm in the horizontal direction with respect to a record disc, respectively, a detector for detecting low frequency vertical and horizontal vibrations of the tone arm during the reproduction of a record disc and feeding back an output signal of the detector to the motors so as to cancel the vibrations, whereby high fidelity reproduction of sounds can be performed. Further, the stylus pressure adjustment and elevation angle adjustment of the tone arm are also performed.
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公开(公告)号：CA1097571A
公开(公告)日：1981-03-17
申请号：CA307023
申请日：1978-07-07
Applicant: SONY CORP
Inventor： OMURA YOSHIMOTO , HARA HIDEO , KAWASHIMA ISAO , SEKIGUCHI KEISUKE , SHINO KUNINORI
Abstract: A tone arm assembly for record players having a first motor for rotating a tone arm in the vertical direction, a second motor for rotating the tone arm in the horizontal direction, with respect to a record disc, respectively, and a control means for controlling the first and second motors in such a manner that the tone arm is moved from a raised inoperative position to a lowered playing position, or from the lowered playing position to the raised inoperative position in response to control signals.
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Patent Agency Ranking
公开(公告)号：DE2913304A1
公开(公告)日：1979-10-11
申请号：DE2913304
申请日：1979-04-03
Applicant: SONY CORP
Inventor： OMURA YOSHIMOTO
Abstract: A record player includes an electro-magnetic member for applying to its tone arm an outside force which is varied to effectively cancel the inside force generated when the stylus located on the tone arm rides upon a rotating record disc. The record player further includes a detecting device for detecting the rotational position of the tone arm, and a computer which, as a function of the rotational position of the tone arm determined from a detecting signal supplied by the detecting device, generates an outside force control voltage which is sufficient, when supplied to the electro-magnetic member, to cancel the inside force. An additional electro-magnetic member may be used to apply a stylus pressure to the tone arm in response to a stylus pressure control voltage. The outside force control voltage may also be varied as a function of such a stylus pressure control voltage.
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公开(公告)号：DE2830466A1
公开(公告)日：1979-02-01
申请号：DE2830466
申请日：1978-07-11
Applicant: SONY CORP
Inventor： OMURA YOSHIMOTO , HARA HIDEO , KAWASHIMA ISAO , SEKIGUCHI KEISUKE , SHINO KUNIORI
Abstract: A tone arm assembly for record players has first and second electro-magnetic motors operable for swinging a tone arm in vertical and horizontal directions, respectively, in respect to a record disc on a turntable, and a control circuit for controlling the first and second motors in such a manner that the tone arm is moved from a raised inoperative position to a lowered playing position, or from the lowered playing position to the raised inoperative position in response to control signals.
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8.发明专利
公开(公告)号：CH636465A5
公开(公告)日：1983-05-31
申请号：CH753678
申请日：1978-07-11
Applicant: SONY CORP
Inventor： OMURA YOSHIMOTO , HARA HIDEO , KAWASHIMA ISAO , SEKIGUCHI KEISUKE , SHINO KUNINORI
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公开(公告)号：AU521865B2
公开(公告)日：1982-05-06
申请号：AU3789078
申请日：1978-07-10
Applicant: SONY CORP
Inventor： OMURA YOSHIMOTO , HARA HIDEO , KAWASHIMA ISAO , SEKIGUCHI KEISUKE , SHINO KUNINORI
Abstract: A tone arm assembly for record players has first and second electro-magnetic motors operable for swinging a tone arm in vertical and horizontal directions, respectively, in respect to a record disc on a turntable, and a control circuit for controlling the first and second motors in such a manner that the tone arm is moved from a raised inoperative position to a lowered playing position, or from the lowered playing position to the raised inoperative position in response to control signals.
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公开(公告)号：CA1096778A
公开(公告)日：1981-03-03
申请号：CA356074
申请日：1980-07-11
Applicant: SONY CORP
Inventor： OMURA YOSHIMOTO , HARA HIDEO , KAWASHIMA ISAO , SEKIGUCHI KEISUKE , SHINO KUNINORI
IPC: G11B17/06
Abstract: A tone arm assembly for record players having a first motor for rotating a tone arm in the vertical direction, a second motor for rotating the tone arm in the horizontal direction, with respect to a record disc, respectively, and a control means for controlling the first and second motors in such a manner that the tone arm is moved from a raised inoperative position to a lowered playing position, or from the lowered playing position to the raised inoperative position in response to control signals.
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