| 发明名称 |
SOUND PLAYBACK DEVICE WITH IMPROVED COIL SPRING PICK-UP ARM |
| 摘要 |
A phonograph has a pivoted pick-up arm and a switch comprising a first contact member protruding from said arm and arcuately movable over at least one second contact member. Operation of said switch actuates circuits for the function of auxiliary devices during playback.
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| 申请公布号 |
US3668343(A) |
申请公布日期 |
1972.06.06 |
| 申请号 |
USD3668343 |
申请日期 |
1970.01.30 |
| 申请人 |
CORRADO RAFFAELI;GUILIANA SOMIGLI |
发明人 |
CORRADO RAFFAELI;GUILIANA SOMIGLI |
| 分类号 |
G11B33/06;(IPC1-7):H01H1/22 |
主分类号 |
G11B33/06 |
| 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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