发明名称 |
STROBOSKOPANORDNING PA EN SKIVSPELARE |
摘要 |
A stroboscope device for a record player for monitoring at least two speeds such as 331/3 and 45 r.p.m. A turntable rim may be provided with a single stroboscope pattern for the relevant speeds. As they pass a light pulse generator, the marks of the stroboscope pattern are optically comparable with light pulse trains produced by a light pulse generator at one of a plurality of frequencies obtained from a given or a-c mains frequency. |
申请公布号 |
SE7811128(A) |
申请公布日期 |
1979.04.30 |
申请号 |
SE19780011128 |
申请日期 |
1978.10.26 |
申请人 |
NV * PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
A * SEITZ |
分类号 |
G01P3/40;G11B19/28;(IPC1-7):G11B19/28 |
主分类号 |
G01P3/40 |
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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