发明授权
- 专利标题： Overhead projector focus arm adjustment mechanism
- 专利标题（中）： 架空投影机对焦臂调节机构
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申请号： US960562申请日： 1992-10-22
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公开(公告)号： US5245370A公开(公告)日： 1993-09-14
- 发明人: James E. Peterson
- 申请人： James E. Peterson
- 申请人地址： MN St. Paul
- 专利权人： Minnesota Mining and Manufacturing Company
- 当前专利权人： Minnesota Mining and Manufacturing Company
- 当前专利权人地址： MN St. Paul
- 主分类号： G03B21/132
- IPC分类号： G03B21/132
摘要：
An adjustment mechanism for use with an overhead projector having a post extending upwardly to support a projection head attached to the attachment mechanism incudes a wear pad partially surrounding the post, a friction pad disposed opposite the wear pad with respect to the post and a spring for urging the friction pad into the post.
公开/授权文献
- USD253858S Shoulder bag 公开/授权日：1980-01-08