A device for holding a surveying instrument plumb and level. The device is attached to a tripod, and a clamp holds a slide bar which, in turn, is affixed to a clip bar. A range pole or other surveying instrument is held by the clip bar and a level is also affixed to the clip bar.
申请公布号
US4290207(A)
申请公布日期
1981.09.22
申请号
US19800127826
申请日期
1980.03.06
申请人
BROWNING, JAMES S.;PFEILER, PETER F.;LOWERY, VERNON
发明人
BROWNING, JAMES S.;PFEILER, PETER F.;LOWERY, VERNON