Method of checking collinearity
US4880306A · kind A · utility
1Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Nov 30, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/27
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For a device having first and second, centrally-bored conduits in substantially collinear alignment along a longitudinal axis, the method checks collinearity of the conduits. Each conduit has a discrete inside diameter, and the method comprises directing light through the conduit which has the greatest inside diameter and displaying the light on a planar surface, downstream thereof, as a circular image. Then, light is directed through a second of said conduit create an emerging beam, and displaying the beam on the planar surface to ascertain its central, or offset, impingement relative to the circular image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.