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公开(公告)号：US3912857A
公开(公告)日：1975-10-14
申请号：US39369573
申请日：1973-08-31
Applicant: RCA CORP
Inventor： MILLER MICHAEL EVANS
CPC classification number: G11B3/38
Abstract: A stylus arm pivot coupling comprises a plug having a tapered end with circular cross section, and a support member with a circular opening having dimensions permitting only a partial entry of, and presenting annular surfaces for smooth engagement with the tapered end of the plug. The plug is attached to the stylus arm and the support member is attached to a stylus arm carrying structure.
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2.发明授权Stereophonic phonograph pickup with single pad for piezoelectric element coupling, support and damping 失效用于压电元件联轴器，支撑和阻尼的单垫片的立体声波纹
公开(公告)号：US3610840A
公开(公告)日：1971-10-05
申请号：US3610840D
申请日：1969-12-24
Applicant: RCA CORP
Inventor： MILLER MICHAEL EVANS
IPC: H04R17/08
CPC classification number: H04R17/08
Abstract: A phonograph pickup includes a case having a top section and a bottom section. A single piece elastomer member includes a stylus beam coupler, a damping block, and two interconnecting support elements mounted in the case. A transducing element is positioned on each of the support elements, with the ends of the transducing elements inserted into apertures in the beam coupler and damping block. Electrical terminals are positioned on opposing surfaces of the transducing elements. When the top and bottom case sections are secured together, female receptacles are formed. Each female receptacle includes one of the electrical terminals positioned on the transducing elements. A guard member having a channel in its underside is secured to the housing. The guard member is positioned such that a predetermined force applied to the pickup stylus deflects the stylus carrying beam into the guard member channel.
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公开(公告)号：US3699268A
公开(公告)日：1972-10-17
申请号：US3699268D
申请日：1971-03-08
Applicant: RCA CORP
Inventor： MILLER MICHAEL EVANS
CPC classification number: H04R17/08
Abstract: A phonograph pickup includes a case having a top section and a bottom section. A single piece elastomer member includes a stylus beam coupler, a damping block, and two interconnecting support elements mounted in the case. A transducing element is positioned on each of the support elements, with the ends of the transducing elements inserted into apertures in the beam coupler and damping block. Electrical terminals are positioned on opposing surfaces of the transducing elements. When the top and bottom case sections are secured together, female receptacles are formed. Each female receptacle includes one of the electrical terminals positioned on the transducing elements. A guard member having a channel in its underside is secured to the housing. The guard member is positioned such that a predetermined force applied to the pickup stylus deflects the stylus carrying beam into the guard member channel.
Abstract translation: 留声机拾音器包括具有顶部和底部的壳体。 单件弹性体构件包括触针梁联接器，阻尼块和安装在壳体中的两个互连支撑元件。 换能元件定位在每个支撑元件上，换能元件的端部插入光束耦合器和阻尼块中的孔中。 电端子定位在换能元件的相对表面上。 当顶部和底部壳体部分固定在一起时，形成插座。 每个母插座包括位于换能元件上的电气端子中的一个。
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公开(公告)号：GB2130426A
公开(公告)日：1984-05-31
申请号：GB8328685
申请日：1983-10-27
Applicant: RCA CORP
Inventor： MILLER MICHAEL EVANS
Abstract: Assembly of a video disc signal recovery stylus apparatus is facilitated by utilizing a stylus holder having a vertical cylindrical end. A conductive leaf spring is inserted in the cylinder followed by a conductive torroidal elastomer. The stylus is then inserted in a hole in the elastomer, all of the parts being held in place by the compressive forces exerted by the elastomer. The second end of the leaf spring is secured to a terminal element which is releasably secured to the stylus arm to provide mobility of the foregoing subassembly during manufacturing. When the subassembly is inserted into a cartridge the terminal element is detached from the stylus arm and inserted into a conformal cavity in the cartridge affording accurate positioning and orientation of the leaf spring.
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公开(公告)号：FR2466929A1
公开(公告)日：1981-04-10
申请号：FR8021128
申请日：1980-10-02
Applicant: RCA CORP
Inventor： ALLEN JAMES AUSTIN , MILLER MICHAEL EVANS
Abstract: A mechanism for retracting a stylus from engagement with the surface of a video disc record. A lever arm arranged parallel to the stylus arm and normally biased to a first position has a filament attached to a free end thereof, the filament being normally disposed to straddle and engage the stylus carrying arm proximate to the stylus to lift and hold the stylus from the record surface. A force which is selectively imparted to the lever arm pivots the lever arm to a second position permitting disengagement of the filament and stylus arm permitting the stylus to engage the record.
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Patent Agency Ranking
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公开(公告)号：AU6767674A
公开(公告)日：1975-10-09
申请号：AU6767674
申请日：1974-04-09
Applicant: RCA CORP
Inventor： AMERY JOHN GORDON , MILLER MICHAEL EVANS
Abstract: 1461848 Pickup positioning device RCA CORPORATION 10 April 1974 [16 April 1973] 15792/74 Heading G5R To oppose undesired cyclic variations, within a given error frequency range, in the relative velocity between a pickup stylus (12), Fig. 1 (not shown), and a rotating grooved record disc 4, a transducer 24 is mechanically coupled to the stylus to vary the position thereof in response to a correction signal, the transducer having an electrical winding 80 located on a first portion and energizable by said signal to produce relative movement between said first portion and a magnetic flux-generating second portion coupled by resilient means 72 to the first portion, and electrical damping means 78 operative to oppose such movement, the transducer having a natural mechanical resonance at a frequency within said error frequency range. The movable member of the transducer comprises a non-magnetic, non-electrically conductive cylinder 56 joined to a stylus support arm 22 by a coupling, which is rigid longitudinally of arm 22 but allows vertical and lateral movement thereof, and connected by resilient annular member 72 to a sleeve 70 fixed on an arm 50 projecting from a permanent, or electro-, magnet 42 providing a flux gap 48 in combination with iron members 40, 46. The winding 80 is provided around or under a closed loop metal band forming the damping means 78. The transducer 24 is located in a conductive housing driven so that the stylus (12) on arm 22 tracks a video disc 4 radially. The disc 4 comprises a dielectric coating (6), Fig. 2 (not shown), over an electrically conductive layer (8) on a dielectric substrate (10) and has a spiral groove engaged by stylus (12) which carries a conductive electrode (14) forming a varying capacitance with layers (6), (8) to effect playback. To correct for errors due to the disc turntable speed, disc eccentricity or recording errors, winding 80 is supplied with an error voltage provided by a frequency discriminator/amplifier circuit responsive to deviations from a norm in the horizontal sync. pulse frequency of the replay signal. Alternatively, if only turntable speed errors are to be corrected, the error voltage may be provided by an optical detector in conjunction with a deflecting pattern on the turntable. The arrangement may be applied to apparatus having a nominally constant turntable angular speed, e.g. 450 r.p.m., or one in which the turntable speed varies to maintain a nominally constant groove velocity at the stylus (12).
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公开(公告)号：GB2130426B
公开(公告)日：1985-10-23
申请号：GB8328685
申请日：1983-10-27
Applicant: RCA CORP
Inventor： MILLER MICHAEL EVANS
Abstract: Assembly of a video disc signal recovery stylus apparatus is facilitated by utilizing a stylus holder having a vertical cylindrical end. A conductive leaf spring is inserted in the cylinder followed by a conductive torroidal elastomer. The stylus is then inserted in a hole in the elastomer, all of the parts being held in place by the compressive forces exerted by the elastomer. The second end of the leaf spring is secured to a terminal element which is releasably secured to the stylus arm to provide mobility of the foregoing subassembly during manufacturing. When the subassembly is inserted into a cartridge the terminal element is detached from the stylus arm and inserted into a conformal cavity in the cartridge affording accurate positioning and orientation of the leaf spring.
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公开(公告)号：GB2104709A
公开(公告)日：1983-03-09
申请号：GB8222990
申请日：1982-08-10
Applicant: RCA CORP
Inventor： MILLER MICHAEL EVANS
Abstract: A playback stylus comprising a dielectric support element having a conical end, two flats in the conical end, and a constricted terminal portion defined by side surfaces, shoulders interconnecting the side surfaces and the flats, a prow defined by a first region between the flats, a second region remote from the prow and a disc engaging surface defined by the prow, side surfaces, and the second region.
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公开(公告)号：FR2480476A1
公开(公告)日：1981-10-16
申请号：FR8107150
申请日：1981-04-09
Applicant: RCA CORP
Inventor： MILLER MICHAEL EVANS
Abstract: In a video disc player of the type having a signal pickup stylus engaging a disc record for recovering prerecorded information signals, an electromechanical transducer is arranged to cooperate with the signal pickup stylus to regulate the bearing pressure between the stylus and the disc in response to the signal strength of the recovered signal. The arrangement tends to extend the life of the stylus.
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