THERMO-SENSITIVE AUTOMATIC SWITCH FOR PUTTING ON/OFF OF ILLUMINATION DEVICE

摘要

PURPOSE:To permit a lighting fixture to be installed in any place and facilitate installation works by providing sensibility for infrared rays from a human body whereever the location is in a room. CONSTITUTION:The power supply side terminal of the body 1 of lighting fixture is inserted to the electrode of a recessed rosette and is connected electrically with lighting fixture 11 through a hook type ceiling rosette. When a heat ray emitted from a human body is sensed by a pyroelectric element (d), a relay output circuit (c) is driven with the output of a sensor circuit (b) so as to close a relay contact S, and the lighting fixture 11 is put on. Therein the scope of infrared sensibility covers the whole room to permit the fixture to be installed in any place, and also any fixture existing can be used, which facilitates the installation works.