Patent · US Expired

Field-of-operation illuminating device accommodating incandescent and discharge lamps

US5743628A · kind A · utility

11Cited by

6References

17Claims

0Family size

Assignee

Heraeus Med GmbH · DE

Inventors

Stefan Greif · Fulda, DE
Jorg Eduard Hartge · Gelnhausen, DE
Till Schmeling · Wipperfürth, DE

Key dates

Filing date	Feb 12, 1996
Grant date	Apr 28, 1998
Priority date	—
Expiry date	Feb 12, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S362/804
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A field-of-operation illuminating device has at least one discharge lamp concentrically surrounded by several halide incandescent lamps at its bottom, which faces the field of operation. The discharge lamp is accommodated in a stationary reflector and illuminates the recesses of the field. The incandescent lamps are mounted in reflectors that can be adjusted so that their beams will overlap in the field. In the event of power outage or failure of the mains, power is supplied to the lamps from a battery-supported substitute source. The incandescent lamps, due to their thermal inertia, continue to burn almost uninterruptedly, whereas the discharge lamp remains off long enough to cool-down before being restarted. The advantages are less heat during normal operation and immediate availability of the incandescent lamps in an emergency.

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