Humidistat
US4150571A · kind A · utility
3Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1975 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | May 23, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N19/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An humidistat has an element movable in response to ambient relative humidity operatively connected to a core of a linearly variable differential transformer for moving the core. The core is supported within a body portion of the transformer for minimal friction of movement relative to the body portion. The body portion has a primary winding and two secondary windings. An oscillator excites the primary winding to provide output signals from the secondary windings proportioned to movement of the core in the body portion and, therefore, indicative of the relative humidity sensed by the element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.