Variable intensity warning light

Details Variable intensity warning light Variable intensity warning light

1975-05-22

1976-11-02

Mullins, James B.

Electric lamp and discharge devices: systems

With radiant energy sensitive control means

Plural load devices

315158, 340 81R, H05B 3702

Patent

active

039899802

ABSTRACT:
An automatic variable lighting device is provided with light responsive means, such as a photocell, for controlling the voltage applied to the lamp in response to ambient light conditions so that a nearly constant contrast between lamp intensity and ambient light intensity results.

REFERENCES:
patent: 3144561 (1964-08-01), Farrell
patent: 3366834 (1968-01-01), Potter

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