发明授权
- 专利标题： Artificial underwater target
- 专利标题（中）： 人造水下目标
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申请号： US573577申请日： 1956-02-29
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公开(公告)号： US4200920A公开(公告)日： 1980-04-29
- 发明人: David J. Evans , Clark F. Bradley
- 申请人： David J. Evans , Clark F. Bradley
- 申请人地址： DC Washington
- 专利权人： The United States of America as represented by the Secretary of the Navy
- 当前专利权人： The United States of America as represented by the Secretary of the Navy
- 当前专利权人地址： DC Washington
- 主分类号： B06B1/02
- IPC分类号： B06B1/02 ; B63G8/22 ; B63G8/34 ; H04K3/00
摘要：
1. In combination in a free, underwater craft, a hull, means for carrying llast, means for discharging said ballast, depth responsive means, a timer providing two time intervals, control means operated by said timer for actuating said discharging means after a pre-set time interval, and other control means operated by both said timer and said depth reponsive means for actuating said discharge means after a shorter time interval if said craft attains a pre-set depth.
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