发明名称 |
MOTOR CONTROLLED MAGNETIC TAPE PLAYBACK MACHINES |
摘要 |
The application discloses an improved three-motor tape playback machine intended primarily for the teaching of languages. The machine is provided with relays which act to render the amplifier circuits of the machine inoperative when the operating push buttons are operated, so reducing at least to a very low level switching and other noises from the sound output. The arrangement also reduces mechanical noise from the machine.
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申请公布号 |
US3693061(A) |
申请公布日期 |
1972.09.19 |
申请号 |
USD3693061 |
申请日期 |
1970.12.16 |
申请人 |
HER MAJESTY THE QUEEN IN RIGHT OF CANADA AS REPRESENTED BY THE SECRETARY OF STATE |
发明人 |
WILHELM MANFRED KAHLE |
分类号 |
G11B5/02;G11B15/44;(IPC1-7):H02P7/00 |
主分类号 |
G11B5/02 |
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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