Patent · US Expired

Indicator tube combined with a temperature gauge

US4629335A · kind A · utility

6Cited by

5References

3Claims

0Family size

Assignee

DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventor

Wolfgang Eckstein · Sereetz, DE

Key dates

Filing date	Mar 15, 1983
Grant date	Dec 16, 1986
Priority date	—
Expiry date	Mar 15, 2003

Classification

Technology area (CPC G)Physics
CPC primaryG01N31/223
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An indicating tube for detecting gas type and characteristics comprises a hollow transparent tube having a passage therethrough for the passage of a gas to be detected and with a first material in the passage giving a visual indication of the gas characteristic and a second material in the passage which gives a visual indication of the temperature characteristic of the gas.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.