Pyrometer 1
US4647775A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Mar 4, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/0896
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pyrometer adapted to be disposed remotely from a heated target employs a manually operated optical range finding device for measuring the distance between the target and the pyrometer. The device includes an objective lens mounted in a rotation-type focusing mechanism, split image effect prisms and a viewing screen. A split image appears on the screen when viewing until the mechanism is rotated to a unique angular position at which the image split disappears, the unique focusing position being a monotonic function of the distance. A mechanical gearing arrangement responsive to mechanism rotation is connected to a multi-turn potentiometer having oppositely disposed fixed contacts at each end and a movable contact. The movable contact is moved along the potentiometer in accordance with rotation of the mechanism. For each unique focusing position of the lens there is a corresponding unique position of the movable contact with respect to the end contacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.