Title:
AUTOMATICALLY TURNING ON/OFF DEVICE
Document Type and Number:
Japanese Patent JPH10233289
Kind Code:
A
Abstract:
To keep constant light-out time and re-lighting time of a load L regardless of season.
An illuminance sensor PS, a first and a second timers 21, 22, and an output relay RL are provided. The first and the second timers 21, 22 are equipped with a common oscillator 20 for changing over an oscillation frequencies f1 and f2=2f1 depending on whether there is a daytime signal Sp and respective counters 21a, 22a, and control turning on/off of a load L via an OR gate, an AND gate, and the output relay RL. The counters 21a, 22a measure a total time of daytime hours and twice after-sunset hours and this total time is substantially constant regardless of season.
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Inventors:
NORIKI TOSHIKI
KONYA HIDENORI
SAKAMURO TOSHIO
IZUMI MASATOSHI
NIIZAKI HIROKI
KONYA HIDENORI
SAKAMURO TOSHIO
IZUMI MASATOSHI
NIIZAKI HIROKI
Application Number:
JP3213897A
Publication Date:
September 02, 1998
Filing Date:
February 17, 1997
Export Citation:
Assignee:
KAGA INC
International Classes:
H05B37/02; (IPC1-7): H05B37/02
Attorney, Agent or Firm:
Tadaaki Matsuda