Device for determining angles
US4112580A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1977 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Apr 11, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B3/56
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device particularly suited for use in optics, having a planar sine plate mounted for rotation about a lateral axis, with the sine plate being capable of holding an optical device such as a diffraction grating. A pivot arm member is mounted for rotation about an axis perpendicular to the axis of rotation of the sine plate, and is in contact with the end of the plate over a portion of its rotational displacement. A calibrated drive such as a micrometer is mounted in position to make contact with the pivot arm near the end thereof, to drive the pivot arm inwardly and outwardly a determinable longitudinal distance. The distance that the pivot arm is driven by the micrometer is related to the angle of the plate as it rotates in contact with the pivot arm. Means are provided for minimizing frictional resistance at the contact between the pivot arm and the plate and between the pivot arm and the drive member of the micrometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.