Temperature indicator and watch provided with such a temperature indicator
US5484205A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1994 |
| Grant date | Jan 16, 1996 |
| Priority date | — |
| Expiry date | Jun 9, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/165
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature indicator has a substrate (1) comprising several distinct juxtaposed zones (I to VIII), each being covered by a first thermosensitive material (A) and at least one second thermosensitive material (B, C) each of which reacts within a predetermined temperature range which is different for each zone but of constant scope. There is no overlapping of the temperature ranges of each material is within each zone. Each of the thermosensitive materials (A,B,C) has a portion of its range of reaction temperatures in common with a portion of the temperature range of one of the materials (A,B,C) of an adjacent zone. This overlapping is lower by one step in each of the temperature ranges. With three thermosensitive materials per zone, 24 sensing elements are available, which enables obtaining 18 times a single non-active sensor, namely 18 temperatures at the step resolution. The temperature is read at the side of the non-active zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.