DK651874
An improved photocontrol system for electrical lamps comprising the combination of photoelectric means responsive to the intensity of the ambient light for controlling the turning the lamps on and off, and an electronic timer for turning off the lamps at a preset time interval, after they have been...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
11.08.1975
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Edition | 2 |
Subjects | |
Online Access | Get full text |
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