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Publication of CH78847ApublicationCriticalpatent/CH78847A/en
G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
G04C23/14—Mechanisms continuously running to relate the operation(s) to the time of day
G04C23/16—Mechanisms continuously running to relate the operation(s) to the time of day acting only at one preselected time or during one adjustable time interval
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CH78847A1916-04-081916-04-08
Apparatus for automatically switching on and off at least one electric lamp at specified times
CH78847A
(en)