发明授权
- 专利标题： Rapidly changeable photographic and stage backdrop lifting device
- 专利标题（中）： 快速变化的摄影和舞台背景升降装置
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申请号： US11744220申请日： 2007-05-04
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公开(公告)号： US07480448B2公开(公告)日： 2009-01-20
- 发明人: Gary D. Clegg
- 申请人： Gary D. Clegg
- 代理商 Eric M Barzee
- 主分类号： G03B15/06
- IPC分类号： G03B15/06
摘要：
This invention relates to the use of suspended materials as a backdrop for photography or stage productions. The suspended materials may be stored on a spool device. Such spool devices may include tubes or spindles constructed of metal, of cardboard, of plastic or other lightweight and inexpensive materials. The spool device may also include means for attaching the tube or spindle to a lifting device. Such attachment means may include a pair of interconnectable coupling devices, one fixed to the spool and the second attached to the lifting device.
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