Counterbalancing apparatus for use in an optical instrument
US4685648A · kind A · utility
38Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 1985 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | May 17, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus for counterbalancing the weight of the movable member in a precision instrument includes a resilient member which is coupled, by way of a non-elastic member, over an eccentric surface of a rotatable member to the movable member. Rotation of the eccentric member causes the resilient member to deform an amount proportional to the eccentricity of the member and a nearly constant counterbalancing force may be applied to the movable member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.