发明名称 |
PLEXOR |
摘要 |
A percussion instrument suitable for use in dental practice for determining the degree of looseness of teeth has a movably seated ram which is accelerated to a defined velocity by an electromagnetic drive means and is subsequently moved toward a test subject (such as a tooth) in free flight. The electromagnetic means also controls return of the ram to a rest position. The ram is comprised of a non-magnetic section and a section of low magnetic retentivity passing through a magnetic coil. Control electronics supplies current pulses to the coil. The velocity of the ram is detected by a measuring and evaluation unit and is maintained at a constant value after a comparison of a rated value with the actual velocity value. The current feed to the coil is discontinued when the rated velocity is reached. |
申请公布号 |
JPS58192536(A) |
申请公布日期 |
1983.11.10 |
申请号 |
JP19830072769 |
申请日期 |
1983.04.25 |
申请人 |
SIEMENS SCHUCKERTWERKE AG |
发明人 |
YURUGEN UOORUGEMUUTO;OIGEN HOOMAN |
分类号 |
A61B9/00;A61B5/11;A61C19/04;B06B1/04;G01N3/00;G01N3/30 |
主分类号 |
A61B9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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