Patent · US Expired

Apparatus for measuring the position of a light source disposed inside a lighthouse

US4630909A · kind A · utility

2Cited by

1References

6Claims

0Family size

Assignee

Standard Elektrik Lorenz AG · DE

Inventors

Dieter Forker · Eßlingen, DE
Joachim Hassler · Eßlingen, DE
Bernhard Lau · Langenau, DE
Rolf Schmidt · Waldbronn, DE

Key dates

Filing date	Feb 14, 1985
Grant date	Dec 23, 1986
Priority date	—
Expiry date	Feb 14, 2005

Classification

Technology area (CPC H)Electricity
CPC primaryH01J9/2272
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Measuring apparatus for measuring the position of a light source inside a lighthouse as used in the manufacture of phosphor screens of color picture tubes comprises a base plate and two optical projection devices which are directed on to the light source, and which each contain at least two position diodes. An evaluating circuit connected thereto ascertains the position of the light source and the result is fed to a display device.

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