Analog display having electroluminescent pointer

Details Analog display having electroluminescent pointer Analog display having electroluminescent pointer

1996-01-30

1997-12-16

Cuchlinski, Jr., William A.

Signals and indicators

Indicators

Rotary indicator with actuating means

116DIG6, 116DIG35, 116DIG36, 368226, 368238, G01D 1328, G01R 108, G04B 1932

Patent

active

056973225

ABSTRACT:
An analog display includes a dial and a movable EL pointer positioned adjacent the dial for indicating a measured value. The pointer is an elongated EL lamp having a conductive pin extending through one end of the lamp and about which the lamp pivots. The pin is mechanically secured to the lamp and is electrically connected to the front electrode of the lamp. A hole larger than cross-sectional diameter of the pin is formed in the rear electrode and in the phosphor layer to prevent the pin from shorting the front electrode to the rear electrode. A conductive spring rests on the pin to provide electrical power to the front electrode. Power is supplied to the rear electrode either through a conductive ferrule attached to the rear electrode or through a resilient wiper. The wiper can be attached to the pointer or to the face of the dial. For plural pointers, concentric conductive pins are used with a sliding contact for the rear electrodes.

REFERENCES:
patent: 2792803 (1957-05-01), Hardesty
patent: 3071105 (1963-01-01), Wertheimer
patent: 3094970 (1963-06-01), Zargarpur
patent: 3219008 (1965-11-01), Harris et al.
patent: 4163428 (1979-08-01), Isikawa
patent: 4995022 (1991-02-01), Ikeda et al.
patent: 5523922 (1996-06-01), Kato
patent: 5623456 (1997-04-01), Miyamoto et al.

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