Air core gauge with expanded pointer range
US3946311A · kind A · utility
20Cited by
3References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1974 |
| Grant date | Mar 23, 1976 |
| Priority date | — |
| Expiry date | Apr 29, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P1/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An air core gauge is provided with a plurality of angularly oriented coils. Switching means are connected to the coils in order to control the flow of current therethrough. Pulse generators responsive to variations in frequency of electrical signals representative of a condition, such as vehicle speed or engine RPM, control the switching means so as to cause excitation of the coils to produce a resultant mmf vector, the angular position of which is related to the frequency of the signals. The resultant mmf vector causes a magnet and associated pointer to rotate to thereby provide an indication of the value of the condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.