发明名称 |
Pulse generating circuit means for depth sounder alarm and transmitter |
摘要 |
Circuit means for keying the transmitter of a flasher type depth sounder when the flasher arm motor is off. An alarm circuit is included in the depth sounder which sounds an alarm if the vessel moves away from a preset depth. When the flasher arm motor is on, a pulse is supplied by a magnet on the flasher arm passing over a pickup coil in the circuit. When the flasher arm motor is off, the pulse generating circuit is designed to provide a transmitter keying signal as well as to reset the alarm.
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申请公布号 |
US4184142(A) |
申请公布日期 |
1980.01.15 |
申请号 |
US19770865539 |
申请日期 |
1977.12.29 |
申请人 |
A B ELECTRONIC SYSTEMS |
发明人 |
BURCH, JOHN;WELLS, PAUL W |
分类号 |
G01S15/08;(IPC1-7):G01S9/68;G01S7/56 |
主分类号 |
G01S15/08 |
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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