再颁专利
- 专利标题： Tribrach device
- 专利标题（中）： Tribrach设备
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申请号： US08825365申请日： 1997-03-28
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公开(公告)号： USRE37318E1公开(公告)日： 2001-08-14
- 发明人: Sonny J. Porter
- 申请人： Sonny J. Porter
- 主分类号： G01C500
- IPC分类号： G01C500
摘要：
An improved tribrach device for attaching an optical sighting instrument to a support such as a tripod. The tribrach device includes a pivotable locking ring for securing the legs of the sighting instrument to the tribrach. The locking ring is biased towards its locked position and is easily unlocked when desired. A laser beam is projected upwardly and downwardly along a vertical axis.
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