Angle change detector
US4571844A · kind A · utility
87Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1983 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Jun 8, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C9/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An angle change detector which can also be used as an inclination angle detector comprises a pair of opposing magnets, a sector-shaped pendulum made of an electroconductive non-magnetic material and swingable past a spacing between the opposing magnets, and a pair of photosensors disposed on both side edges of the pendulum. Each photosensor comprises a light emitting diode and a phototransistor disposed on both sides of the pendulum. Output signals of the phototransistors are compared with a reference signal for producing an output signal corresponding to the degree of swinging of the pendulum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.