| 发明名称 |
TRANSMITTING AND RECEIVING DEVICE FORULTRASONIC PULSE SWITCH |
| 摘要 |
PURPOSE:To provide a transmitting and receiving device for an ultrasonic pulse switch, in which ultrasonic horns having different directivities are mounted to an automatic door or the like so as to obtain any detecting area. |
| 申请公布号 |
JPS5273019(A) |
申请公布日期 |
1977.06.18 |
| 申请号 |
JP19750149809 |
申请日期 |
1975.12.15 |
| 申请人 |
MATSUSHITA ELECTRIC WORKS LTD |
发明人 |
KATAYAMA SUSUMU;INOUE HIRONOBU;OOHASHI HIROSHI |
| 分类号 |
H04R1/30;B06B1/00;G10K11/02 |
主分类号 |
H04R1/30 |
| 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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