发明授权
US4098030A Method for forming a narrowed-electrode pickup stylus for video disc
systems
失效
用于形成用于视盘系统的变窄电极拾取针的方法
- 专利标题: Method for forming a narrowed-electrode pickup stylus for video disc systems
- 专利标题(中): 用于形成用于视盘系统的变窄电极拾取针的方法
-
申请号: US782019申请日: 1977-03-28
-
公开(公告)号: US4098030A公开(公告)日: 1978-07-04
- 发明人: Jack Selig Fuhrer , Eugene Orville Keizer
- 申请人: Jack Selig Fuhrer , Eugene Orville Keizer
- 申请人地址: NY New York
- 专利权人: RCA Corporation
- 当前专利权人: RCA Corporation
- 当前专利权人地址: NY New York
- 主分类号: B24B19/16
- IPC分类号: B24B19/16 ; G11B3/44 ; G11B9/07 ; B24B1/00
摘要:
A novel pickup stylus includes a tapering dielectric support element which has a tip defined by a prow and a relatively flat surface remote from the prow. The dielectric support element has an arrowhead-shaped cross-section in the region of its tip with the apex of the arrowhead-shape cross-section located on the prow and its base defined by the rear surface. The entire rear surface of the dielectric support element is covered with conductive material to form a narrow electrode in the region of its tip. To form a narrowed-electrode stylus, a tapering dielectric support element, having a prow and an electrode surface remote from the prow, is introduced in a trapezoidal abrasive groove while relative motion is established therebetween. The electrode face of the support element is gradually tilted toward the abrasive groove until it subtends a shallow angle therewith to form a portion having an arrowhead-shape cross-section in the region of its tip. The support element is lapped later to form a bottom surface defining a stylus shoe.
公开/授权文献
- US6142981A Hemostasis valve 公开/授权日:2000-11-07
信息查询