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1.发明授权Magnetic head with tape-contacting guard surface and pole tips of similar iron-based materials 失效磁带头与带状接触保护表面和类似的铁基材料的提示
公开(公告)号：US3598925A
公开(公告)日：1971-08-10
申请号：US3598925D
申请日：1968-10-17
Applicant: SONY CORP
Inventor： SAKAI YOSHIO , NAKAMURA ZENKICHI , TAKAHASHI KATSUMASA , SASADA NAOTOSHI
CPC classification number: G11B5/255
Abstract: A magnetic head for video tape recorders having adjacent its iron-silicon-aluminum alloy pole tips a guard member of an ironsilicon-aluminum alloy providing a tape contact surface having a hardness substantially equal to or a little less than that of the pole tips over the operating temperature range, but which guard material is substantially nonmagnetic under working conditions. It is preferred to have the constituent elements of the material of the guard member similar to those of the pole tip material. The guard member may also be of a nonmagnetic iron-aluminummolybdenum alloy with pole tips of an iron-silicon-aluminum alloy for example.
Abstract translation: 一种用于磁带录像机的磁头，其具有与其铁氧体磁极尖相邻的类似的铁氧体材料的防护构件，其提供在工作温度范围内硬度基本上等于或稍小于磁极尖端的硬度的磁带接触表面，但是哪个 防护材料在工作条件下基本上是非磁性的。 优选的是具有与极尖材料类似的防护构件的材料的物理性质如摩擦系数，热膨胀系数等。
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公开(公告)号：DE2616119A1
公开(公告)日：1976-10-28
申请号：DE2616119
申请日：1976-04-13
Applicant: SONY CORP
Inventor： SHIMADA OSAMU , TAKAHASHI KATSUMASA
Abstract: A rotary head assembly, for example, for recording and/or reproducing video signals on a recording tape which is wrapped about at least a portion of the circumference of a tape guide drum, includes a primary support member moved in a circular path which is concentric with the guide drum, an intermediate support member, a first spring or springs connecting the primary and intermediate support members for yieldably resisting centrifugal movement of the intermediate support member relative to the primary support member, and a recording and/or reproducing head member or transducer connected to the intermediate support member by a second spring or springs providing the head member with a natural frequency of movement relative to the intermediate support member which is suitable to cause the head member to follow high frequency vibration of the tape and to reduce hunching of the latter at the location where the head member first contacts the tape, and which is substantially greater than the natural frequency of the centrifugal movement of the intermediate support member relative to the primary support member so that such centrifugal movement can ensure the adequate contact of the head member with the tape in response to movement of the primary support member in its circular path.
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公开(公告)号：DE2231191A1
公开(公告)日：1973-01-18
申请号：DE2231191
申请日：1972-06-26
Applicant: SONY CORP
Inventor： OZAWA KAZUNORI , TAKAHASHI KATSUMASA
Abstract: A single crystal ferrite material magnetic head for a video tape recorder or other device which is formed with a pair of half-cores with an opening between them for winding and in which the magnetic gap by which the magnetic tape passes is formed of surfaces which are uniform and which have minimum breakage and roughness due to the fact that the planes on which the ferrite single crystal material is cut coincides with the orientation of the crystals of the material which gives the minimum breakage and cracking. Experimental tests have indicated that single crystal ferrite material may be cut or ground on certain planes with greater ease thus resulting in less breakage, fracture and cracking than on other planes, and, the present invention provides magnetic cores which are so formed that the transducing gap takes advantage of these discoveries and results in improved magnetic heads.
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公开(公告)号：CA1077168A
公开(公告)日：1980-05-06
申请号：CA253592
申请日：1976-05-28
Applicant: SONY CORP
Inventor： TAKAHASHI KATSUMASA , SAITO ETSURO
Abstract: A rotary head assembly, for example, for recording and/ or reproducing video signals on a recording tape which is wrapped about at least a portion of the periphery of a tape guide drum. A head member is secured to the other ends of the resilient cantilevered support arms so that centrifugal movement of the head member through a gap of the guide drum thereby to engage with the tape wrapped about the drum and is resiliently resisted by flexing of the cantilevered support arms. The rotary assembly includes a support moved in a circular path concentric with the guide drum, for example, by being secured to a rotated part of the guide drum. The support has a radially outward directed portion and parallel, resilient cantilevered support arms which are secured at one end to the radial body portion at spaced apart locations along the latter so as to extend from such body portion substantially at right angles to the latter.
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公开(公告)号：CA1047641A
公开(公告)日：1979-01-30
申请号：CA225487
申请日：1975-04-25
Applicant: SONY CORP
Inventor： KIHARA NOBUTOSHI , TAKAHASHI KATSUMASA
Abstract: ROTARY HEAD ASSEMBLY A rotary head assembly is disclosed including a transducer for recording information on and reproducing information from a record medium. The transducer is resiliently supported by a resilient support member which, in turn, is secured to a transducer receiving structure, the latter being coupled to a rotary drive device for rotating the transducer about an axis of rotation to thereby permit information to be recorded on and reproduced from the record medium which is contacted by the transducer. In addition to resiliently supporting the transducer, the transducer receiving member also exerts a restraining force on the transducer which is opposite to the cetnrifugal force exerted thereon when the transducer is rotated.
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Patent Agency Ranking
公开(公告)号：DE2518262A1
公开(公告)日：1975-11-06
申请号：DE2518262
申请日：1975-04-24
Applicant: SONY CORP
Inventor： KIHARA NOBUTOSHI , TAKAHASHI KATSUMASA
Abstract: A rotary head assembly is disclosed including a transducer for recording information on and reproducing information from a record medium. The transducer is resiliently supported by a resilient support member which, in turn, is secured to a transducer receiving structure, the latter being coupled to a rotary drive device for rotating the transducer about an axis of rotation to thereby permit information to be recorded on and reproduced from the record medium which is contacted by the transducer. In addition to resiliently supporting the transducer, the transducer receiving member also exerts a restraining force on the transducer which is opposite to the centrifugal force exerted thereon when the transducer is rotated.
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公开(公告)号：CA950803A
公开(公告)日：1974-07-09
申请号：CA145808
申请日：1972-06-27
Applicant: SONY CORP
Inventor： OZAWA KAZUNORI , TAKAHASHI KATSUMASA
IPC: G11B5/133
Abstract: A single crystal ferrite material magnetic head for a video tape recorder or other device which is formed with a pair of half-cores with an opening between them for winding and in which the magnetic gap by which the magnetic tape passes is formed of surfaces which are uniform and which have minimum breakage and roughness due to the fact that the planes on which the ferrite single crystal material is cut coincides with the orientation of the crystals of the material which gives the minimum breakage and cracking. Experimental tests have indicated that single crystal ferrite material may be cut or ground on certain planes with greater ease thus resulting in less breakage, fracture and cracking than on other planes, and, the present invention provides magnetic cores which are so formed that the transducing gap takes advantage of these discoveries and results in improved magnetic heads.
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公开(公告)号：CA1075358A
公开(公告)日：1980-04-08
申请号：CA250201
申请日：1976-04-13
Applicant: SONY CORP
Inventor： SHIMADA OSAMU , TAKAHASHI KATSUMASA
Abstract: The present invention relates to a rotary head assembly, for example, a rotary head assembly for recording or reproducing video signals on a recording tape wrapped at least partially around the tape guide drum of a video tape recorder. The head assembly includes a primary support, an intermediate support and a recording and/or reproducing head. The primary support is moved in a circular path concentric with the guide drum. The intermediate support is connected to the primary support by a first spring which yieldably resists centrifugal movement of the intermediate support relative to the primary support. The recording and/or reproducing head is connected to the intermediate support by a second spring which provides the head with a natural frequency of movement relative to the intermediate support. This natural frequency of movement is substantially greater than the natural frequency of the centrifugal movement of the intermediate support relative to the primary support. As a result the rotation of the primary support at operating speed causes the intermediate support to move against the bias of the first spring so as to place the head against the tape, while *he head can move rapidly relative to the intermediate support so as to follow high frequency vibration of the tape and to reduce hunching of the tape at the locations where the head first contact it.
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公开(公告)号：DE2624115A1
公开(公告)日：1976-12-16
申请号：DE2624115
申请日：1976-05-28
Applicant: SONY CORP
Inventor： TAKAHASHI KATSUMASA , SAITO ETSURO
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公开(公告)号：CA874116A
公开(公告)日：1971-06-22
申请号：CA874116D
Applicant: SONY CORP
Inventor： TAKAHASHI KATSUMASA , NAKAMURA ZENKICHI , SAKAI YOSHIO , SASADA NAOTOSHI
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