发明授权
- 专利标题： Overhead projection apparatus
- 专利标题（中）： OVERHEAD投影设备
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申请号： US3711194D申请日： 1965-10-24
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公开(公告)号： US3711194A公开(公告)日： 1973-01-16
- 发明人: WILSON H
- 申请人： WILSON H
- 专利权人： H Wilson
- 当前专利权人： H Wilson
- 优先权： US50459865 1965-10-24
- 主分类号： G03B21/132
- IPC分类号： G03B21/132 ; G03B21/28
摘要：
Projection apparatus embodying a housing having a lamp casing therein for projecting a light beam onto a reflective surface that directs the beam upwardly through a film and into a lens assembly for ultimate projection of an image onto a screen, wherein the lens assembly is carried on a telescopic mast that may collapse into the housing and is adjustable to vary the angle of the projected image.
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