Matsushita Electric Works, Ltd.

Makoto Morimoto

Mikio Kondo

Hirotoshi Watanabe

Shiro Mori

Kazuhito Kayanoki

Muneo Suzuki

Tatsuya Abe

Takahiro Yamanouchi

Masaharu Fukushima

Hideki Kawahara

The automatic gang switch having a heat ray sensor is fixedly mounted on a mounting frame having a generally rectangular opening. The length of a housing of the switch is approximately two thirds of that of the generally rectangular opening of the mounting frame, while the width of the housing is approximately equal to that of the generally rectangular opening of the mounting frame. The switch includes a human body detecting section for detecting heat rays emitted from a human body and a circuit section. The circuit section includes a control circuit for generating a control signal to turn a load on for a predetermined operation holding time when the human body detecting section generates a detection signal, a load control circuit connected to a power source and the load in series for turning on or off power supply to the load depending on the control signal, an off-time power circuit connected in parallel with the load control circuit and having an input impedance with which the load is not driven when the load control circuit is off, the off-time power circuit supplying an electric power to the control circuit when the load control circuit is off, and an on-time power circuit for supplying the electric power to the control circuit when the load control circuit is on. The switch further includes a time setting section for setting an operation holding time and a mode setting section for changing over an operation mode of the control circuit.

Automatic gang switch having a heat ray sensor

An infrared detector is arranged so that a detection-input processing circuit part including an infrared sensor mounted on a circuit board is housed as isolated from ambient air in a chamber inhibiting any ambient air inflow, for sensing infrared rays emitted from a human body or the like object as condensed by a condenser irrespective of the ambient air conditions, the sensing ability of the infrared sensor the accuracy of which is likely to be easily deteriorated even with a very small change in the ambient temperature can be thereby stabilized, and a highly accurate infrared detection can be constantly achieved.

Infrared detector

A passive infrared detector including an optical collector releasably attached to a base with a sensor on which incident infrared radiation directed through the optical collector is focused. The sensor is held by a joint member which is pivotally supported on the base and to which said optical collector is releasably attached, whereby the optical collector is rotatable together with the joint member relative to the base for adjustment of its angular position and the optical collector can be alone replaced as necessary without having to replace the base, the sensor and its associated electric circuitry.

Passive infrared detector

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Hisai, Japan

Makoto Morimoto