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FLUORESCENT LAMP DESIGN FOR MERCURY STABILITY

IP.com Disclosure Number: IPCOM000025348D
Original Publication Date: 1984-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 46K

Publishing Venue

Xerox Disclosure Journal

Abstract

The figure shows a fluorescent lamp design which avoids undesirable deposition of mercury on the tube wall. As shown, a lamp 10 (end portion shown) contains a metering device consisting of a resistive metallic strip 12 having a mercury alloy bonded thereto. The strip is placed at the end of the lamp adjacent the lamp electrode 14.

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XEROX DISCLOSURE JOURNAL

FLUORESCENT LAMP DESIGN FOR MERCURY STABILITY
Thomas J. Hammond

Proposed Classification
U.S. Cl. 362/260 Int. Cl. F21k

a.

The figure shows a fluorescent lamp design which avoids undesirable deposition of mercury on the tube wall. As shown, a lamp 10 (end portion shown) contains a metering device consisting of a resistive metallic strip 12 having a mercury alloy bonded thereto. The strip is placed at the end of the lamp adjacent the lamp electrode 14. When power is applied to the heater strip, it warms up and, in turn, heats up the mercury alloy.

Output leads 16 connect the strip to a voltage source 18.

At the time of lamp manufacture, the lamp is loaded with the minimum amount of mercury needed to run the lamp. During lamp operation, as the output drops because of the depletion of free mercury, the metering strip 12 is powered after a sufficient time and a temperature to compensate for the mercury lost.

Volume 9 Number 5 September/October 1984 353

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XEROX 354 DISCLOSURE JOURNAL

Volume 9 Number 5 September/October 1984

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