Overhead projector focus arm adjustment mechanism
US5245370A · kind A · utility
5Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Oct 22, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S353/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.