Apparatus and method for detecting the presence of a heat-emitting body
US4386275A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1980 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Dec 9, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for detecting the presence of a heat emitting body within a region provides for the mounting of a cylindrical shroud having an apertured circumference within the fields of view of an infrared sensor responsive to changes in thermal energy received as a heat emitting body enters the fields of view. The motion of the heat emitting body through the fields of view provides different levels of radiation received at the sensor thereby developing a current imbalance at the output of the sensor which is used to actuate switching circuitry for controlling an appliance which is to be actuated upon entry of a heat emitting body into the field of view of the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.